1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Pinctrl GPIO driver for Intel Baytrail
4 *
5 * Copyright (c) 2012-2013, Intel Corporation
6 * Author: Mathias Nyman <mathias.nyman@linux.intel.com>
7 */
8
9#include <linux/acpi.h>
10#include <linux/array_size.h>
11#include <linux/bitops.h>
12#include <linux/cleanup.h>
13#include <linux/gpio/driver.h>
14#include <linux/init.h>
15#include <linux/interrupt.h>
16#include <linux/io.h>
17#include <linux/module.h>
18#include <linux/types.h>
19#include <linux/platform_device.h>
20#include <linux/pm.h>
21#include <linux/property.h>
22#include <linux/seq_file.h>
23#include <linux/string_helpers.h>
24
25#include <linux/pinctrl/pinctrl.h>
26#include <linux/pinctrl/pinmux.h>
27#include <linux/pinctrl/pinconf.h>
28#include <linux/pinctrl/pinconf-generic.h>
29
30#include "pinctrl-intel.h"
31
32/* memory mapped register offsets */
33#define BYT_CONF0_REG 0x000
34#define BYT_CONF1_REG 0x004
35#define BYT_VAL_REG 0x008
36#define BYT_DFT_REG 0x00c
37#define BYT_INT_STAT_REG 0x800
38#define BYT_DIRECT_IRQ_REG 0x980
39#define BYT_DEBOUNCE_REG 0x9d0
40
41/* BYT_CONF0_REG register bits */
42#define BYT_IODEN BIT(31)
43#define BYT_DIRECT_IRQ_EN BIT(27)
44#define BYT_TRIG_MASK GENMASK(26, 24)
45#define BYT_TRIG_NEG BIT(26)
46#define BYT_TRIG_POS BIT(25)
47#define BYT_TRIG_LVL BIT(24)
48#define BYT_DEBOUNCE_EN BIT(20)
49#define BYT_GLITCH_FILTER_EN BIT(19)
50#define BYT_GLITCH_F_SLOW_CLK BIT(17)
51#define BYT_GLITCH_F_FAST_CLK BIT(16)
52#define BYT_PULL_STR_SHIFT 9
53#define BYT_PULL_STR_MASK GENMASK(10, 9)
54#define BYT_PULL_STR_2K (0 << BYT_PULL_STR_SHIFT)
55#define BYT_PULL_STR_10K (1 << BYT_PULL_STR_SHIFT)
56#define BYT_PULL_STR_20K (2 << BYT_PULL_STR_SHIFT)
57#define BYT_PULL_STR_40K (3 << BYT_PULL_STR_SHIFT)
58#define BYT_PULL_ASSIGN_MASK GENMASK(8, 7)
59#define BYT_PULL_ASSIGN_DOWN BIT(8)
60#define BYT_PULL_ASSIGN_UP BIT(7)
61#define BYT_PIN_MUX GENMASK(2, 0)
62
63/* BYT_VAL_REG register bits */
64#define BYT_DIR_MASK GENMASK(2, 1)
65#define BYT_INPUT_EN BIT(2) /* 0: input enabled (active low)*/
66#define BYT_OUTPUT_EN BIT(1) /* 0: output enabled (active low)*/
67#define BYT_LEVEL BIT(0)
68
69#define BYT_CONF0_RESTORE_MASK (BYT_DIRECT_IRQ_EN | BYT_TRIG_MASK | BYT_PIN_MUX)
70#define BYT_VAL_RESTORE_MASK (BYT_DIR_MASK | BYT_LEVEL)
71
72/* BYT_DEBOUNCE_REG bits */
73#define BYT_DEBOUNCE_PULSE_MASK GENMASK(2, 0)
74#define BYT_DEBOUNCE_PULSE_375US 1
75#define BYT_DEBOUNCE_PULSE_750US 2
76#define BYT_DEBOUNCE_PULSE_1500US 3
77#define BYT_DEBOUNCE_PULSE_3MS 4
78#define BYT_DEBOUNCE_PULSE_6MS 5
79#define BYT_DEBOUNCE_PULSE_12MS 6
80#define BYT_DEBOUNCE_PULSE_24MS 7
81
82#define BYT_NGPIO_SCORE 102
83#define BYT_NGPIO_NCORE 28
84#define BYT_NGPIO_SUS 44
85
86#define BYT_SCORE_ACPI_UID "1"
87#define BYT_NCORE_ACPI_UID "2"
88#define BYT_SUS_ACPI_UID "3"
89
90/*
91 * This is the function value most pins have for GPIO muxing. If the value
92 * differs from the default one, it must be explicitly mentioned. Otherwise, the
93 * pin control implementation will set the muxing value to default GPIO if it
94 * does not find a match for the requested function.
95 */
96#define BYT_DEFAULT_GPIO_MUX 0
97#define BYT_ALTER_GPIO_MUX 1
98
99struct intel_pad_context {
100 u32 conf0;
101 u32 val;
102};
103
104#define COMMUNITY(p, n, map) \
105 { \
106 .pin_base = (p), \
107 .npins = (n), \
108 .pad_map = (map),\
109 }
110
111/* SCORE pins, aka GPIOC_<pin_no> or GPIO_S0_SC[<pin_no>] */
112static const struct pinctrl_pin_desc byt_score_pins[] = {
113 PINCTRL_PIN(0, "SATA_GP0"),
114 PINCTRL_PIN(1, "SATA_GP1"),
115 PINCTRL_PIN(2, "SATA_LED#"),
116 PINCTRL_PIN(3, "PCIE_CLKREQ0"),
117 PINCTRL_PIN(4, "PCIE_CLKREQ1"),
118 PINCTRL_PIN(5, "PCIE_CLKREQ2"),
119 PINCTRL_PIN(6, "PCIE_CLKREQ3"),
120 PINCTRL_PIN(7, "SD3_WP"),
121 PINCTRL_PIN(8, "HDA_RST"),
122 PINCTRL_PIN(9, "HDA_SYNC"),
123 PINCTRL_PIN(10, "HDA_CLK"),
124 PINCTRL_PIN(11, "HDA_SDO"),
125 PINCTRL_PIN(12, "HDA_SDI0"),
126 PINCTRL_PIN(13, "HDA_SDI1"),
127 PINCTRL_PIN(14, "GPIO_S0_SC14"),
128 PINCTRL_PIN(15, "GPIO_S0_SC15"),
129 PINCTRL_PIN(16, "MMC1_CLK"),
130 PINCTRL_PIN(17, "MMC1_D0"),
131 PINCTRL_PIN(18, "MMC1_D1"),
132 PINCTRL_PIN(19, "MMC1_D2"),
133 PINCTRL_PIN(20, "MMC1_D3"),
134 PINCTRL_PIN(21, "MMC1_D4"),
135 PINCTRL_PIN(22, "MMC1_D5"),
136 PINCTRL_PIN(23, "MMC1_D6"),
137 PINCTRL_PIN(24, "MMC1_D7"),
138 PINCTRL_PIN(25, "MMC1_CMD"),
139 PINCTRL_PIN(26, "MMC1_RST"),
140 PINCTRL_PIN(27, "SD2_CLK"),
141 PINCTRL_PIN(28, "SD2_D0"),
142 PINCTRL_PIN(29, "SD2_D1"),
143 PINCTRL_PIN(30, "SD2_D2"),
144 PINCTRL_PIN(31, "SD2_D3_CD"),
145 PINCTRL_PIN(32, "SD2_CMD"),
146 PINCTRL_PIN(33, "SD3_CLK"),
147 PINCTRL_PIN(34, "SD3_D0"),
148 PINCTRL_PIN(35, "SD3_D1"),
149 PINCTRL_PIN(36, "SD3_D2"),
150 PINCTRL_PIN(37, "SD3_D3"),
151 PINCTRL_PIN(38, "SD3_CD"),
152 PINCTRL_PIN(39, "SD3_CMD"),
153 PINCTRL_PIN(40, "SD3_1P8EN"),
154 PINCTRL_PIN(41, "SD3_PWREN#"),
155 PINCTRL_PIN(42, "ILB_LPC_AD0"),
156 PINCTRL_PIN(43, "ILB_LPC_AD1"),
157 PINCTRL_PIN(44, "ILB_LPC_AD2"),
158 PINCTRL_PIN(45, "ILB_LPC_AD3"),
159 PINCTRL_PIN(46, "ILB_LPC_FRAME"),
160 PINCTRL_PIN(47, "ILB_LPC_CLK0"),
161 PINCTRL_PIN(48, "ILB_LPC_CLK1"),
162 PINCTRL_PIN(49, "ILB_LPC_CLKRUN"),
163 PINCTRL_PIN(50, "ILB_LPC_SERIRQ"),
164 PINCTRL_PIN(51, "PCU_SMB_DATA"),
165 PINCTRL_PIN(52, "PCU_SMB_CLK"),
166 PINCTRL_PIN(53, "PCU_SMB_ALERT"),
167 PINCTRL_PIN(54, "ILB_8254_SPKR"),
168 PINCTRL_PIN(55, "GPIO_S0_SC55"),
169 PINCTRL_PIN(56, "GPIO_S0_SC56"),
170 PINCTRL_PIN(57, "GPIO_S0_SC57"),
171 PINCTRL_PIN(58, "GPIO_S0_SC58"),
172 PINCTRL_PIN(59, "GPIO_S0_SC59"),
173 PINCTRL_PIN(60, "GPIO_S0_SC60"),
174 PINCTRL_PIN(61, "GPIO_S0_SC61"),
175 PINCTRL_PIN(62, "LPE_I2S2_CLK"),
176 PINCTRL_PIN(63, "LPE_I2S2_FRM"),
177 PINCTRL_PIN(64, "LPE_I2S2_DATAIN"),
178 PINCTRL_PIN(65, "LPE_I2S2_DATAOUT"),
179 PINCTRL_PIN(66, "SIO_SPI_CS"),
180 PINCTRL_PIN(67, "SIO_SPI_MISO"),
181 PINCTRL_PIN(68, "SIO_SPI_MOSI"),
182 PINCTRL_PIN(69, "SIO_SPI_CLK"),
183 PINCTRL_PIN(70, "SIO_UART1_RXD"),
184 PINCTRL_PIN(71, "SIO_UART1_TXD"),
185 PINCTRL_PIN(72, "SIO_UART1_RTS"),
186 PINCTRL_PIN(73, "SIO_UART1_CTS"),
187 PINCTRL_PIN(74, "SIO_UART2_RXD"),
188 PINCTRL_PIN(75, "SIO_UART2_TXD"),
189 PINCTRL_PIN(76, "SIO_UART2_RTS"),
190 PINCTRL_PIN(77, "SIO_UART2_CTS"),
191 PINCTRL_PIN(78, "SIO_I2C0_DATA"),
192 PINCTRL_PIN(79, "SIO_I2C0_CLK"),
193 PINCTRL_PIN(80, "SIO_I2C1_DATA"),
194 PINCTRL_PIN(81, "SIO_I2C1_CLK"),
195 PINCTRL_PIN(82, "SIO_I2C2_DATA"),
196 PINCTRL_PIN(83, "SIO_I2C2_CLK"),
197 PINCTRL_PIN(84, "SIO_I2C3_DATA"),
198 PINCTRL_PIN(85, "SIO_I2C3_CLK"),
199 PINCTRL_PIN(86, "SIO_I2C4_DATA"),
200 PINCTRL_PIN(87, "SIO_I2C4_CLK"),
201 PINCTRL_PIN(88, "SIO_I2C5_DATA"),
202 PINCTRL_PIN(89, "SIO_I2C5_CLK"),
203 PINCTRL_PIN(90, "SIO_I2C6_DATA"),
204 PINCTRL_PIN(91, "SIO_I2C6_CLK"),
205 PINCTRL_PIN(92, "GPIO_S0_SC92"),
206 PINCTRL_PIN(93, "GPIO_S0_SC93"),
207 PINCTRL_PIN(94, "SIO_PWM0"),
208 PINCTRL_PIN(95, "SIO_PWM1"),
209 PINCTRL_PIN(96, "PMC_PLT_CLK0"),
210 PINCTRL_PIN(97, "PMC_PLT_CLK1"),
211 PINCTRL_PIN(98, "PMC_PLT_CLK2"),
212 PINCTRL_PIN(99, "PMC_PLT_CLK3"),
213 PINCTRL_PIN(100, "PMC_PLT_CLK4"),
214 PINCTRL_PIN(101, "PMC_PLT_CLK5"),
215};
216
217static const unsigned int byt_score_pins_map[BYT_NGPIO_SCORE] = {
218 85, 89, 93, 96, 99, 102, 98, 101, 34, 37,
219 36, 38, 39, 35, 40, 84, 62, 61, 64, 59,
220 54, 56, 60, 55, 63, 57, 51, 50, 53, 47,
221 52, 49, 48, 43, 46, 41, 45, 42, 58, 44,
222 95, 105, 70, 68, 67, 66, 69, 71, 65, 72,
223 86, 90, 88, 92, 103, 77, 79, 83, 78, 81,
224 80, 82, 13, 12, 15, 14, 17, 18, 19, 16,
225 2, 1, 0, 4, 6, 7, 9, 8, 33, 32,
226 31, 30, 29, 27, 25, 28, 26, 23, 21, 20,
227 24, 22, 5, 3, 10, 11, 106, 87, 91, 104,
228 97, 100,
229};
230
231/* SCORE groups */
232static const unsigned int byt_score_uart1_pins[] = { 70, 71, 72, 73 };
233static const unsigned int byt_score_uart2_pins[] = { 74, 75, 76, 77 };
234static const unsigned int byt_score_uart3_pins[] = { 57, 61 };
235
236static const unsigned int byt_score_pwm0_pins[] = { 94 };
237static const unsigned int byt_score_pwm1_pins[] = { 95 };
238
239static const unsigned int byt_score_sio_spi_pins[] = { 66, 67, 68, 69 };
240
241static const unsigned int byt_score_i2c5_pins[] = { 88, 89 };
242static const unsigned int byt_score_i2c6_pins[] = { 90, 91 };
243static const unsigned int byt_score_i2c4_pins[] = { 86, 87 };
244static const unsigned int byt_score_i2c3_pins[] = { 84, 85 };
245static const unsigned int byt_score_i2c2_pins[] = { 82, 83 };
246static const unsigned int byt_score_i2c1_pins[] = { 80, 81 };
247static const unsigned int byt_score_i2c0_pins[] = { 78, 79 };
248
249static const unsigned int byt_score_ssp0_pins[] = { 8, 9, 10, 11 };
250static const unsigned int byt_score_ssp1_pins[] = { 12, 13, 14, 15 };
251static const unsigned int byt_score_ssp2_pins[] = { 62, 63, 64, 65 };
252
253static const unsigned int byt_score_sdcard_pins[] = {
254 7, 33, 34, 35, 36, 37, 38, 39, 40, 41,
255};
256static const unsigned int byt_score_sdcard_mux_values[] = {
257 2, 1, 1, 1, 1, 1, 1, 1, 1, 1,
258};
259
260static const unsigned int byt_score_sdio_pins[] = { 27, 28, 29, 30, 31, 32 };
261
262static const unsigned int byt_score_emmc_pins[] = {
263 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,
264};
265
266static const unsigned int byt_score_ilb_lpc_pins[] = {
267 42, 43, 44, 45, 46, 47, 48, 49, 50,
268};
269
270static const unsigned int byt_score_sata_pins[] = { 0, 1, 2 };
271
272static const unsigned int byt_score_plt_clk0_pins[] = { 96 };
273static const unsigned int byt_score_plt_clk1_pins[] = { 97 };
274static const unsigned int byt_score_plt_clk2_pins[] = { 98 };
275static const unsigned int byt_score_plt_clk3_pins[] = { 99 };
276static const unsigned int byt_score_plt_clk4_pins[] = { 100 };
277static const unsigned int byt_score_plt_clk5_pins[] = { 101 };
278
279static const unsigned int byt_score_smbus_pins[] = { 51, 52, 53 };
280
281static const struct intel_pingroup byt_score_groups[] = {
282 PIN_GROUP_GPIO("uart1_grp", byt_score_uart1_pins, 1),
283 PIN_GROUP_GPIO("uart2_grp", byt_score_uart2_pins, 1),
284 PIN_GROUP_GPIO("uart3_grp", byt_score_uart3_pins, 1),
285 PIN_GROUP_GPIO("pwm0_grp", byt_score_pwm0_pins, 1),
286 PIN_GROUP_GPIO("pwm1_grp", byt_score_pwm1_pins, 1),
287 PIN_GROUP_GPIO("ssp2_grp", byt_score_ssp2_pins, 1),
288 PIN_GROUP_GPIO("sio_spi_grp", byt_score_sio_spi_pins, 1),
289 PIN_GROUP_GPIO("i2c5_grp", byt_score_i2c5_pins, 1),
290 PIN_GROUP_GPIO("i2c6_grp", byt_score_i2c6_pins, 1),
291 PIN_GROUP_GPIO("i2c4_grp", byt_score_i2c4_pins, 1),
292 PIN_GROUP_GPIO("i2c3_grp", byt_score_i2c3_pins, 1),
293 PIN_GROUP_GPIO("i2c2_grp", byt_score_i2c2_pins, 1),
294 PIN_GROUP_GPIO("i2c1_grp", byt_score_i2c1_pins, 1),
295 PIN_GROUP_GPIO("i2c0_grp", byt_score_i2c0_pins, 1),
296 PIN_GROUP_GPIO("ssp0_grp", byt_score_ssp0_pins, 1),
297 PIN_GROUP_GPIO("ssp1_grp", byt_score_ssp1_pins, 1),
298 PIN_GROUP_GPIO("sdcard_grp", byt_score_sdcard_pins, byt_score_sdcard_mux_values),
299 PIN_GROUP_GPIO("sdio_grp", byt_score_sdio_pins, 1),
300 PIN_GROUP_GPIO("emmc_grp", byt_score_emmc_pins, 1),
301 PIN_GROUP_GPIO("lpc_grp", byt_score_ilb_lpc_pins, 1),
302 PIN_GROUP_GPIO("sata_grp", byt_score_sata_pins, 1),
303 PIN_GROUP_GPIO("plt_clk0_grp", byt_score_plt_clk0_pins, 1),
304 PIN_GROUP_GPIO("plt_clk1_grp", byt_score_plt_clk1_pins, 1),
305 PIN_GROUP_GPIO("plt_clk2_grp", byt_score_plt_clk2_pins, 1),
306 PIN_GROUP_GPIO("plt_clk3_grp", byt_score_plt_clk3_pins, 1),
307 PIN_GROUP_GPIO("plt_clk4_grp", byt_score_plt_clk4_pins, 1),
308 PIN_GROUP_GPIO("plt_clk5_grp", byt_score_plt_clk5_pins, 1),
309 PIN_GROUP_GPIO("smbus_grp", byt_score_smbus_pins, 1),
310};
311
312static const char * const byt_score_uart_groups[] = {
313 "uart1_grp", "uart2_grp", "uart3_grp",
314};
315static const char * const byt_score_pwm_groups[] = {
316 "pwm0_grp", "pwm1_grp",
317};
318static const char * const byt_score_ssp_groups[] = {
319 "ssp0_grp", "ssp1_grp", "ssp2_grp",
320};
321static const char * const byt_score_spi_groups[] = { "sio_spi_grp" };
322static const char * const byt_score_i2c_groups[] = {
323 "i2c0_grp", "i2c1_grp", "i2c2_grp", "i2c3_grp", "i2c4_grp", "i2c5_grp",
324 "i2c6_grp",
325};
326static const char * const byt_score_sdcard_groups[] = { "sdcard_grp" };
327static const char * const byt_score_sdio_groups[] = { "sdio_grp" };
328static const char * const byt_score_emmc_groups[] = { "emmc_grp" };
329static const char * const byt_score_lpc_groups[] = { "lpc_grp" };
330static const char * const byt_score_sata_groups[] = { "sata_grp" };
331static const char * const byt_score_plt_clk_groups[] = {
332 "plt_clk0_grp", "plt_clk1_grp", "plt_clk2_grp", "plt_clk3_grp",
333 "plt_clk4_grp", "plt_clk5_grp",
334};
335static const char * const byt_score_smbus_groups[] = { "smbus_grp" };
336static const char * const byt_score_gpio_groups[] = {
337 "uart1_grp_gpio", "uart2_grp_gpio", "uart3_grp_gpio", "pwm0_grp_gpio",
338 "pwm1_grp_gpio", "ssp0_grp_gpio", "ssp1_grp_gpio", "ssp2_grp_gpio",
339 "sio_spi_grp_gpio", "i2c0_grp_gpio", "i2c1_grp_gpio", "i2c2_grp_gpio",
340 "i2c3_grp_gpio", "i2c4_grp_gpio", "i2c5_grp_gpio", "i2c6_grp_gpio",
341 "sdcard_grp_gpio", "sdio_grp_gpio", "emmc_grp_gpio", "lpc_grp_gpio",
342 "sata_grp_gpio", "plt_clk0_grp_gpio", "plt_clk1_grp_gpio",
343 "plt_clk2_grp_gpio", "plt_clk3_grp_gpio", "plt_clk4_grp_gpio",
344 "plt_clk5_grp_gpio", "smbus_grp_gpio",
345};
346
347static const struct intel_function byt_score_functions[] = {
348 FUNCTION("uart", byt_score_uart_groups),
349 FUNCTION("pwm", byt_score_pwm_groups),
350 FUNCTION("ssp", byt_score_ssp_groups),
351 FUNCTION("spi", byt_score_spi_groups),
352 FUNCTION("i2c", byt_score_i2c_groups),
353 FUNCTION("sdcard", byt_score_sdcard_groups),
354 FUNCTION("sdio", byt_score_sdio_groups),
355 FUNCTION("emmc", byt_score_emmc_groups),
356 FUNCTION("lpc", byt_score_lpc_groups),
357 FUNCTION("sata", byt_score_sata_groups),
358 FUNCTION("plt_clk", byt_score_plt_clk_groups),
359 FUNCTION("smbus", byt_score_smbus_groups),
360 FUNCTION("gpio", byt_score_gpio_groups),
361};
362
363static const struct intel_community byt_score_communities[] = {
364 COMMUNITY(0, BYT_NGPIO_SCORE, byt_score_pins_map),
365};
366
367static const struct intel_pinctrl_soc_data byt_score_soc_data = {
368 .uid = BYT_SCORE_ACPI_UID,
369 .pins = byt_score_pins,
370 .npins = ARRAY_SIZE(byt_score_pins),
371 .groups = byt_score_groups,
372 .ngroups = ARRAY_SIZE(byt_score_groups),
373 .functions = byt_score_functions,
374 .nfunctions = ARRAY_SIZE(byt_score_functions),
375 .communities = byt_score_communities,
376 .ncommunities = ARRAY_SIZE(byt_score_communities),
377};
378
379/* SUS pins, aka GPIOS_<pin_no> or GPIO_S5[<pin_no>] */
380static const struct pinctrl_pin_desc byt_sus_pins[] = {
381 PINCTRL_PIN(0, "GPIO_S50"),
382 PINCTRL_PIN(1, "GPIO_S51"),
383 PINCTRL_PIN(2, "GPIO_S52"),
384 PINCTRL_PIN(3, "GPIO_S53"),
385 PINCTRL_PIN(4, "GPIO_S54"),
386 PINCTRL_PIN(5, "GPIO_S55"),
387 PINCTRL_PIN(6, "GPIO_S56"),
388 PINCTRL_PIN(7, "GPIO_S57"),
389 PINCTRL_PIN(8, "GPIO_S58"),
390 PINCTRL_PIN(9, "GPIO_S59"),
391 PINCTRL_PIN(10, "GPIO_S510"),
392 PINCTRL_PIN(11, "PMC_SUSPWRDNACK"),
393 PINCTRL_PIN(12, "PMC_SUSCLK0"),
394 PINCTRL_PIN(13, "GPIO_S513"),
395 PINCTRL_PIN(14, "USB_ULPI_RST"),
396 PINCTRL_PIN(15, "PMC_WAKE_PCIE0#"),
397 PINCTRL_PIN(16, "PMC_PWRBTN"),
398 PINCTRL_PIN(17, "GPIO_S517"),
399 PINCTRL_PIN(18, "PMC_SUS_STAT"),
400 PINCTRL_PIN(19, "USB_OC0"),
401 PINCTRL_PIN(20, "USB_OC1"),
402 PINCTRL_PIN(21, "PCU_SPI_CS1"),
403 PINCTRL_PIN(22, "GPIO_S522"),
404 PINCTRL_PIN(23, "GPIO_S523"),
405 PINCTRL_PIN(24, "GPIO_S524"),
406 PINCTRL_PIN(25, "GPIO_S525"),
407 PINCTRL_PIN(26, "GPIO_S526"),
408 PINCTRL_PIN(27, "GPIO_S527"),
409 PINCTRL_PIN(28, "GPIO_S528"),
410 PINCTRL_PIN(29, "GPIO_S529"),
411 PINCTRL_PIN(30, "GPIO_S530"),
412 PINCTRL_PIN(31, "USB_ULPI_CLK"),
413 PINCTRL_PIN(32, "USB_ULPI_DATA0"),
414 PINCTRL_PIN(33, "USB_ULPI_DATA1"),
415 PINCTRL_PIN(34, "USB_ULPI_DATA2"),
416 PINCTRL_PIN(35, "USB_ULPI_DATA3"),
417 PINCTRL_PIN(36, "USB_ULPI_DATA4"),
418 PINCTRL_PIN(37, "USB_ULPI_DATA5"),
419 PINCTRL_PIN(38, "USB_ULPI_DATA6"),
420 PINCTRL_PIN(39, "USB_ULPI_DATA7"),
421 PINCTRL_PIN(40, "USB_ULPI_DIR"),
422 PINCTRL_PIN(41, "USB_ULPI_NXT"),
423 PINCTRL_PIN(42, "USB_ULPI_STP"),
424 PINCTRL_PIN(43, "USB_ULPI_REFCLK"),
425};
426
427static const unsigned int byt_sus_pins_map[BYT_NGPIO_SUS] = {
428 29, 33, 30, 31, 32, 34, 36, 35, 38, 37,
429 18, 7, 11, 20, 17, 1, 8, 10, 19, 12,
430 0, 2, 23, 39, 28, 27, 22, 21, 24, 25,
431 26, 51, 56, 54, 49, 55, 48, 57, 50, 58,
432 52, 53, 59, 40,
433};
434
435static const unsigned int byt_sus_usb_over_current_pins[] = { 19, 20 };
436static const unsigned int byt_sus_usb_over_current_mode_values[] = { 0, 0 };
437static const unsigned int byt_sus_usb_over_current_gpio_mode_values[] = { 1, 1 };
438
439static const unsigned int byt_sus_usb_ulpi_pins[] = {
440 14, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43,
441};
442static const unsigned int byt_sus_usb_ulpi_mode_values[] = {
443 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
444};
445static const unsigned int byt_sus_usb_ulpi_gpio_mode_values[] = {
446 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
447};
448
449static const unsigned int byt_sus_pcu_spi_pins[] = { 21 };
450static const unsigned int byt_sus_pcu_spi_mode_values[] = { 0 };
451static const unsigned int byt_sus_pcu_spi_gpio_mode_values[] = { 1 };
452
453static const unsigned int byt_sus_pmu_clk1_pins[] = { 5 };
454static const unsigned int byt_sus_pmu_clk2_pins[] = { 6 };
455
456static const struct intel_pingroup byt_sus_groups[] = {
457 PIN_GROUP("usb_oc_grp", byt_sus_usb_over_current_pins, byt_sus_usb_over_current_mode_values),
458 PIN_GROUP("usb_ulpi_grp", byt_sus_usb_ulpi_pins, byt_sus_usb_ulpi_mode_values),
459 PIN_GROUP("pcu_spi_grp", byt_sus_pcu_spi_pins, byt_sus_pcu_spi_mode_values),
460 PIN_GROUP("usb_oc_grp_gpio", byt_sus_usb_over_current_pins, byt_sus_usb_over_current_gpio_mode_values),
461 PIN_GROUP("usb_ulpi_grp_gpio", byt_sus_usb_ulpi_pins, byt_sus_usb_ulpi_gpio_mode_values),
462 PIN_GROUP("pcu_spi_grp_gpio", byt_sus_pcu_spi_pins, byt_sus_pcu_spi_gpio_mode_values),
463 PIN_GROUP_GPIO("pmu_clk1_grp", byt_sus_pmu_clk1_pins, 1),
464 PIN_GROUP_GPIO("pmu_clk2_grp", byt_sus_pmu_clk2_pins, 1),
465};
466
467static const char * const byt_sus_usb_groups[] = {
468 "usb_oc_grp", "usb_ulpi_grp",
469};
470static const char * const byt_sus_spi_groups[] = { "pcu_spi_grp" };
471static const char * const byt_sus_pmu_clk_groups[] = {
472 "pmu_clk1_grp", "pmu_clk2_grp",
473};
474static const char * const byt_sus_gpio_groups[] = {
475 "usb_oc_grp_gpio", "usb_ulpi_grp_gpio", "pcu_spi_grp_gpio",
476 "pmu_clk1_grp_gpio", "pmu_clk2_grp_gpio",
477};
478
479static const struct intel_function byt_sus_functions[] = {
480 FUNCTION("usb", byt_sus_usb_groups),
481 FUNCTION("spi", byt_sus_spi_groups),
482 FUNCTION("gpio", byt_sus_gpio_groups),
483 FUNCTION("pmu_clk", byt_sus_pmu_clk_groups),
484};
485
486static const struct intel_community byt_sus_communities[] = {
487 COMMUNITY(0, BYT_NGPIO_SUS, byt_sus_pins_map),
488};
489
490static const struct intel_pinctrl_soc_data byt_sus_soc_data = {
491 .uid = BYT_SUS_ACPI_UID,
492 .pins = byt_sus_pins,
493 .npins = ARRAY_SIZE(byt_sus_pins),
494 .groups = byt_sus_groups,
495 .ngroups = ARRAY_SIZE(byt_sus_groups),
496 .functions = byt_sus_functions,
497 .nfunctions = ARRAY_SIZE(byt_sus_functions),
498 .communities = byt_sus_communities,
499 .ncommunities = ARRAY_SIZE(byt_sus_communities),
500};
501
502static const struct pinctrl_pin_desc byt_ncore_pins[] = {
503 PINCTRL_PIN(0, "HV_DDI0_HPD"),
504 PINCTRL_PIN(1, "HV_DDI0_DDC_SDA"),
505 PINCTRL_PIN(2, "HV_DDI0_DDC_SCL"),
506 PINCTRL_PIN(3, "PANEL0_VDDEN"),
507 PINCTRL_PIN(4, "PANEL0_BKLTEN"),
508 PINCTRL_PIN(5, "PANEL0_BKLTCTL"),
509 PINCTRL_PIN(6, "HV_DDI1_HPD"),
510 PINCTRL_PIN(7, "HV_DDI1_DDC_SDA"),
511 PINCTRL_PIN(8, "HV_DDI1_DDC_SCL"),
512 PINCTRL_PIN(9, "PANEL1_VDDEN"),
513 PINCTRL_PIN(10, "PANEL1_BKLTEN"),
514 PINCTRL_PIN(11, "PANEL1_BKLTCTL"),
515 PINCTRL_PIN(12, "GP_INTD_DSI_TE1"),
516 PINCTRL_PIN(13, "HV_DDI2_DDC_SDA"),
517 PINCTRL_PIN(14, "HV_DDI2_DDC_SCL"),
518 PINCTRL_PIN(15, "GP_CAMERASB00"),
519 PINCTRL_PIN(16, "GP_CAMERASB01"),
520 PINCTRL_PIN(17, "GP_CAMERASB02"),
521 PINCTRL_PIN(18, "GP_CAMERASB03"),
522 PINCTRL_PIN(19, "GP_CAMERASB04"),
523 PINCTRL_PIN(20, "GP_CAMERASB05"),
524 PINCTRL_PIN(21, "GP_CAMERASB06"),
525 PINCTRL_PIN(22, "GP_CAMERASB07"),
526 PINCTRL_PIN(23, "GP_CAMERASB08"),
527 PINCTRL_PIN(24, "GP_CAMERASB09"),
528 PINCTRL_PIN(25, "GP_CAMERASB10"),
529 PINCTRL_PIN(26, "GP_CAMERASB11"),
530 PINCTRL_PIN(27, "GP_INTD_DSI_TE2"),
531};
532
533static const unsigned int byt_ncore_pins_map[BYT_NGPIO_NCORE] = {
534 19, 18, 17, 20, 21, 22, 24, 25, 23, 16,
535 14, 15, 12, 26, 27, 1, 4, 8, 11, 0,
536 3, 6, 10, 13, 2, 5, 9, 7,
537};
538
539static const struct intel_community byt_ncore_communities[] = {
540 COMMUNITY(0, BYT_NGPIO_NCORE, byt_ncore_pins_map),
541};
542
543static const struct intel_pinctrl_soc_data byt_ncore_soc_data = {
544 .uid = BYT_NCORE_ACPI_UID,
545 .pins = byt_ncore_pins,
546 .npins = ARRAY_SIZE(byt_ncore_pins),
547 .communities = byt_ncore_communities,
548 .ncommunities = ARRAY_SIZE(byt_ncore_communities),
549};
550
551static const struct intel_pinctrl_soc_data *byt_soc_data[] = {
552 &byt_score_soc_data,
553 &byt_sus_soc_data,
554 &byt_ncore_soc_data,
555 NULL
556};
557
558static DEFINE_RAW_SPINLOCK(byt_lock);
559
560static void __iomem *byt_gpio_reg(struct intel_pinctrl *vg, unsigned int offset,
561 int reg)
562{
563 const struct intel_community *comm;
564 u32 reg_offset;
565
566 comm = intel_get_community(pctrl: vg, pin: offset);
567 if (!comm)
568 return NULL;
569
570 offset -= comm->pin_base;
571 switch (reg) {
572 case BYT_INT_STAT_REG:
573 reg_offset = (offset / 32) * 4;
574 break;
575 case BYT_DEBOUNCE_REG:
576 reg_offset = 0;
577 break;
578 default:
579 reg_offset = comm->pad_map[offset] * 16;
580 break;
581 }
582
583 return comm->pad_regs + reg_offset + reg;
584}
585
586static const struct pinctrl_ops byt_pinctrl_ops = {
587 .get_groups_count = intel_get_groups_count,
588 .get_group_name = intel_get_group_name,
589 .get_group_pins = intel_get_group_pins,
590};
591
592static void byt_set_group_simple_mux(struct intel_pinctrl *vg,
593 const struct intel_pingroup group,
594 unsigned int func)
595{
596 int i;
597
598 guard(raw_spinlock_irqsave)(l: &byt_lock);
599
600 for (i = 0; i < group.grp.npins; i++) {
601 void __iomem *padcfg0;
602 u32 value;
603
604 padcfg0 = byt_gpio_reg(vg, offset: group.grp.pins[i], BYT_CONF0_REG);
605 if (!padcfg0) {
606 dev_warn(vg->dev, "Group %s, pin %i not muxed (can't retrieve CONF0)\n",
607 group.grp.name, i);
608 continue;
609 }
610
611 value = readl(addr: padcfg0);
612 value &= ~BYT_PIN_MUX;
613 value |= func;
614 writel(val: value, addr: padcfg0);
615 }
616}
617
618static void byt_set_group_mixed_mux(struct intel_pinctrl *vg,
619 const struct intel_pingroup group,
620 const unsigned int *func)
621{
622 int i;
623
624 guard(raw_spinlock_irqsave)(l: &byt_lock);
625
626 for (i = 0; i < group.grp.npins; i++) {
627 void __iomem *padcfg0;
628 u32 value;
629
630 padcfg0 = byt_gpio_reg(vg, offset: group.grp.pins[i], BYT_CONF0_REG);
631 if (!padcfg0) {
632 dev_warn(vg->dev, "Group %s, pin %i not muxed (can't retrieve CONF0)\n",
633 group.grp.name, i);
634 continue;
635 }
636
637 value = readl(addr: padcfg0);
638 value &= ~BYT_PIN_MUX;
639 value |= func[i];
640 writel(val: value, addr: padcfg0);
641 }
642}
643
644static int byt_set_mux(struct pinctrl_dev *pctldev, unsigned int func_selector,
645 unsigned int group_selector)
646{
647 struct intel_pinctrl *vg = pinctrl_dev_get_drvdata(pctldev);
648 const struct intel_function func = vg->soc->functions[func_selector];
649 const struct intel_pingroup group = vg->soc->groups[group_selector];
650
651 if (group.modes)
652 byt_set_group_mixed_mux(vg, group, func: group.modes);
653 else if (!strcmp(func.func.name, "gpio"))
654 byt_set_group_simple_mux(vg, group, BYT_DEFAULT_GPIO_MUX);
655 else
656 byt_set_group_simple_mux(vg, group, func: group.mode);
657
658 return 0;
659}
660
661static u32 byt_get_gpio_mux(struct intel_pinctrl *vg, unsigned int offset)
662{
663 /* SCORE pin 92-93 */
664 if (!strcmp(vg->soc->uid, BYT_SCORE_ACPI_UID) &&
665 offset >= 92 && offset <= 93)
666 return BYT_ALTER_GPIO_MUX;
667
668 /* SUS pin 11-21 */
669 if (!strcmp(vg->soc->uid, BYT_SUS_ACPI_UID) &&
670 offset >= 11 && offset <= 21)
671 return BYT_ALTER_GPIO_MUX;
672
673 return BYT_DEFAULT_GPIO_MUX;
674}
675
676static void byt_gpio_clear_triggering(struct intel_pinctrl *vg, unsigned int offset)
677{
678 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG);
679 u32 value;
680
681 guard(raw_spinlock_irqsave)(l: &byt_lock);
682
683 value = readl(addr: reg);
684
685 /* Do not clear direct-irq enabled IRQs (from gpio_disable_free) */
686 if (!(value & BYT_DIRECT_IRQ_EN))
687 value &= ~(BYT_TRIG_POS | BYT_TRIG_NEG | BYT_TRIG_LVL);
688
689 writel(val: value, addr: reg);
690}
691
692static int byt_gpio_request_enable(struct pinctrl_dev *pctl_dev,
693 struct pinctrl_gpio_range *range,
694 unsigned int offset)
695{
696 struct intel_pinctrl *vg = pinctrl_dev_get_drvdata(pctldev: pctl_dev);
697 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG);
698 u32 value, gpio_mux;
699
700 guard(raw_spinlock_irqsave)(l: &byt_lock);
701
702 /*
703 * In most cases, func pin mux 000 means GPIO function.
704 * But, some pins may have func pin mux 001 represents
705 * GPIO function.
706 *
707 * Because there are devices out there where some pins were not
708 * configured correctly we allow changing the mux value from
709 * request (but print out warning about that).
710 */
711 value = readl(addr: reg) & BYT_PIN_MUX;
712 gpio_mux = byt_get_gpio_mux(vg, offset);
713 if (gpio_mux == value)
714 return 0;
715
716 value = readl(addr: reg) & ~BYT_PIN_MUX;
717 value |= gpio_mux;
718 writel(val: value, addr: reg);
719
720 dev_warn(vg->dev, FW_BUG "Pin %i: forcibly re-configured as GPIO\n", offset);
721
722 return 0;
723}
724
725static void byt_gpio_disable_free(struct pinctrl_dev *pctl_dev,
726 struct pinctrl_gpio_range *range,
727 unsigned int offset)
728{
729 struct intel_pinctrl *vg = pinctrl_dev_get_drvdata(pctldev: pctl_dev);
730
731 byt_gpio_clear_triggering(vg, offset);
732}
733
734static void byt_gpio_direct_irq_check(struct intel_pinctrl *vg,
735 unsigned int offset)
736{
737 void __iomem *conf_reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG);
738
739 /*
740 * Before making any direction modifications, do a check if gpio is set
741 * for direct IRQ. On Bay Trail, setting GPIO to output does not make
742 * sense, so let's at least inform the caller before they shoot
743 * themselves in the foot.
744 */
745 if (readl(addr: conf_reg) & BYT_DIRECT_IRQ_EN)
746 dev_info_once(vg->dev,
747 "Potential Error: Pin %i: forcibly set GPIO with DIRECT_IRQ_EN to output\n",
748 offset);
749}
750
751static int byt_gpio_set_direction(struct pinctrl_dev *pctl_dev,
752 struct pinctrl_gpio_range *range,
753 unsigned int offset,
754 bool input)
755{
756 struct intel_pinctrl *vg = pinctrl_dev_get_drvdata(pctldev: pctl_dev);
757 void __iomem *val_reg = byt_gpio_reg(vg, offset, BYT_VAL_REG);
758 u32 value;
759
760 guard(raw_spinlock_irqsave)(l: &byt_lock);
761
762 value = readl(addr: val_reg);
763 value &= ~BYT_DIR_MASK;
764 if (input)
765 value |= BYT_OUTPUT_EN;
766 else
767 byt_gpio_direct_irq_check(vg, offset);
768
769 writel(val: value, addr: val_reg);
770
771 return 0;
772}
773
774static const struct pinmux_ops byt_pinmux_ops = {
775 .get_functions_count = intel_get_functions_count,
776 .get_function_name = intel_get_function_name,
777 .get_function_groups = intel_get_function_groups,
778 .set_mux = byt_set_mux,
779 .gpio_request_enable = byt_gpio_request_enable,
780 .gpio_disable_free = byt_gpio_disable_free,
781 .gpio_set_direction = byt_gpio_set_direction,
782};
783
784static void byt_get_pull_strength(u32 reg, u16 *strength)
785{
786 switch (reg & BYT_PULL_STR_MASK) {
787 case BYT_PULL_STR_2K:
788 *strength = 2000;
789 break;
790 case BYT_PULL_STR_10K:
791 *strength = 10000;
792 break;
793 case BYT_PULL_STR_20K:
794 *strength = 20000;
795 break;
796 case BYT_PULL_STR_40K:
797 *strength = 40000;
798 break;
799 }
800}
801
802static int byt_set_pull_strength(u32 *reg, u16 strength)
803{
804 *reg &= ~BYT_PULL_STR_MASK;
805
806 switch (strength) {
807 case 1: /* Set default strength value in case none is given */
808 case 2000:
809 *reg |= BYT_PULL_STR_2K;
810 break;
811 case 10000:
812 *reg |= BYT_PULL_STR_10K;
813 break;
814 case 20000:
815 *reg |= BYT_PULL_STR_20K;
816 break;
817 case 40000:
818 *reg |= BYT_PULL_STR_40K;
819 break;
820 default:
821 return -EINVAL;
822 }
823
824 return 0;
825}
826
827static void byt_gpio_force_input_mode(struct intel_pinctrl *vg, unsigned int offset)
828{
829 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_VAL_REG);
830 u32 value;
831
832 value = readl(addr: reg);
833 if (!(value & BYT_INPUT_EN))
834 return;
835
836 /*
837 * Pull assignment is only applicable in input mode. If
838 * chip is not in input mode, set it and warn about it.
839 */
840 value &= ~BYT_INPUT_EN;
841 writel(val: value, addr: reg);
842 dev_warn(vg->dev, "Pin %i: forcibly set to input mode\n", offset);
843}
844
845static int byt_pin_config_get(struct pinctrl_dev *pctl_dev, unsigned int offset,
846 unsigned long *config)
847{
848 struct intel_pinctrl *vg = pinctrl_dev_get_drvdata(pctldev: pctl_dev);
849 enum pin_config_param param = pinconf_to_config_param(config: *config);
850 void __iomem *conf_reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG);
851 void __iomem *val_reg = byt_gpio_reg(vg, offset, BYT_VAL_REG);
852 void __iomem *db_reg = byt_gpio_reg(vg, offset, BYT_DEBOUNCE_REG);
853 u32 conf, pull, val, debounce;
854 u16 arg = 0;
855
856 scoped_guard(raw_spinlock_irqsave, &byt_lock) {
857 conf = readl(addr: conf_reg);
858 val = readl(addr: val_reg);
859 }
860
861 pull = conf & BYT_PULL_ASSIGN_MASK;
862
863 switch (param) {
864 case PIN_CONFIG_BIAS_DISABLE:
865 if (pull)
866 return -EINVAL;
867 break;
868 case PIN_CONFIG_BIAS_PULL_DOWN:
869 /* Pull assignment is only applicable in input mode */
870 if ((val & BYT_INPUT_EN) || pull != BYT_PULL_ASSIGN_DOWN)
871 return -EINVAL;
872
873 byt_get_pull_strength(reg: conf, strength: &arg);
874
875 break;
876 case PIN_CONFIG_BIAS_PULL_UP:
877 /* Pull assignment is only applicable in input mode */
878 if ((val & BYT_INPUT_EN) || pull != BYT_PULL_ASSIGN_UP)
879 return -EINVAL;
880
881 byt_get_pull_strength(reg: conf, strength: &arg);
882
883 break;
884 case PIN_CONFIG_INPUT_DEBOUNCE:
885 if (!(conf & BYT_DEBOUNCE_EN))
886 return -EINVAL;
887
888 scoped_guard(raw_spinlock_irqsave, &byt_lock)
889 debounce = readl(addr: db_reg);
890
891 switch (debounce & BYT_DEBOUNCE_PULSE_MASK) {
892 case BYT_DEBOUNCE_PULSE_375US:
893 arg = 375;
894 break;
895 case BYT_DEBOUNCE_PULSE_750US:
896 arg = 750;
897 break;
898 case BYT_DEBOUNCE_PULSE_1500US:
899 arg = 1500;
900 break;
901 case BYT_DEBOUNCE_PULSE_3MS:
902 arg = 3000;
903 break;
904 case BYT_DEBOUNCE_PULSE_6MS:
905 arg = 6000;
906 break;
907 case BYT_DEBOUNCE_PULSE_12MS:
908 arg = 12000;
909 break;
910 case BYT_DEBOUNCE_PULSE_24MS:
911 arg = 24000;
912 break;
913 default:
914 return -EINVAL;
915 }
916
917 break;
918 default:
919 return -ENOTSUPP;
920 }
921
922 *config = pinconf_to_config_packed(param, argument: arg);
923
924 return 0;
925}
926
927static int byt_pin_config_set(struct pinctrl_dev *pctl_dev,
928 unsigned int offset,
929 unsigned long *configs,
930 unsigned int num_configs)
931{
932 struct intel_pinctrl *vg = pinctrl_dev_get_drvdata(pctldev: pctl_dev);
933 void __iomem *conf_reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG);
934 void __iomem *db_reg = byt_gpio_reg(vg, offset, BYT_DEBOUNCE_REG);
935 u32 conf, db_pulse, debounce;
936 enum pin_config_param param;
937 int i, ret;
938 u32 arg;
939
940 guard(raw_spinlock_irqsave)(l: &byt_lock);
941
942 conf = readl(addr: conf_reg);
943
944 for (i = 0; i < num_configs; i++) {
945 param = pinconf_to_config_param(config: configs[i]);
946 arg = pinconf_to_config_argument(config: configs[i]);
947
948 switch (param) {
949 case PIN_CONFIG_BIAS_DISABLE:
950 conf &= ~BYT_PULL_ASSIGN_MASK;
951 break;
952 case PIN_CONFIG_BIAS_PULL_DOWN:
953 byt_gpio_force_input_mode(vg, offset);
954
955 conf &= ~BYT_PULL_ASSIGN_MASK;
956 conf |= BYT_PULL_ASSIGN_DOWN;
957 ret = byt_set_pull_strength(reg: &conf, strength: arg);
958 if (ret)
959 return ret;
960
961 break;
962 case PIN_CONFIG_BIAS_PULL_UP:
963 byt_gpio_force_input_mode(vg, offset);
964
965 conf &= ~BYT_PULL_ASSIGN_MASK;
966 conf |= BYT_PULL_ASSIGN_UP;
967 ret = byt_set_pull_strength(reg: &conf, strength: arg);
968 if (ret)
969 return ret;
970
971 break;
972 case PIN_CONFIG_INPUT_DEBOUNCE:
973 switch (arg) {
974 case 0:
975 db_pulse = 0;
976 break;
977 case 375:
978 db_pulse = BYT_DEBOUNCE_PULSE_375US;
979 break;
980 case 750:
981 db_pulse = BYT_DEBOUNCE_PULSE_750US;
982 break;
983 case 1500:
984 db_pulse = BYT_DEBOUNCE_PULSE_1500US;
985 break;
986 case 3000:
987 db_pulse = BYT_DEBOUNCE_PULSE_3MS;
988 break;
989 case 6000:
990 db_pulse = BYT_DEBOUNCE_PULSE_6MS;
991 break;
992 case 12000:
993 db_pulse = BYT_DEBOUNCE_PULSE_12MS;
994 break;
995 case 24000:
996 db_pulse = BYT_DEBOUNCE_PULSE_24MS;
997 break;
998 default:
999 return -EINVAL;
1000 }
1001
1002 if (db_pulse) {
1003 debounce = readl(addr: db_reg);
1004 debounce = (debounce & ~BYT_DEBOUNCE_PULSE_MASK) | db_pulse;
1005 writel(val: debounce, addr: db_reg);
1006
1007 conf |= BYT_DEBOUNCE_EN;
1008 } else {
1009 conf &= ~BYT_DEBOUNCE_EN;
1010 }
1011
1012 break;
1013 default:
1014 return -ENOTSUPP;
1015 }
1016 }
1017
1018 writel(val: conf, addr: conf_reg);
1019
1020 return 0;
1021}
1022
1023static const struct pinconf_ops byt_pinconf_ops = {
1024 .is_generic = true,
1025 .pin_config_get = byt_pin_config_get,
1026 .pin_config_set = byt_pin_config_set,
1027};
1028
1029static const struct pinctrl_desc byt_pinctrl_desc = {
1030 .pctlops = &byt_pinctrl_ops,
1031 .pmxops = &byt_pinmux_ops,
1032 .confops = &byt_pinconf_ops,
1033 .owner = THIS_MODULE,
1034};
1035
1036static int byt_gpio_get(struct gpio_chip *chip, unsigned int offset)
1037{
1038 struct intel_pinctrl *vg = gpiochip_get_data(gc: chip);
1039 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_VAL_REG);
1040 u32 val;
1041
1042 scoped_guard(raw_spinlock_irqsave, &byt_lock)
1043 val = readl(addr: reg);
1044
1045 return !!(val & BYT_LEVEL);
1046}
1047
1048static void byt_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
1049{
1050 struct intel_pinctrl *vg = gpiochip_get_data(gc: chip);
1051 void __iomem *reg;
1052 u32 old_val;
1053
1054 reg = byt_gpio_reg(vg, offset, BYT_VAL_REG);
1055 if (!reg)
1056 return;
1057
1058 guard(raw_spinlock_irqsave)(l: &byt_lock);
1059
1060 old_val = readl(addr: reg);
1061 if (value)
1062 writel(val: old_val | BYT_LEVEL, addr: reg);
1063 else
1064 writel(val: old_val & ~BYT_LEVEL, addr: reg);
1065}
1066
1067static int byt_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
1068{
1069 struct intel_pinctrl *vg = gpiochip_get_data(gc: chip);
1070 void __iomem *reg;
1071 u32 value;
1072
1073 reg = byt_gpio_reg(vg, offset, BYT_VAL_REG);
1074 if (!reg)
1075 return -EINVAL;
1076
1077 scoped_guard(raw_spinlock_irqsave, &byt_lock)
1078 value = readl(addr: reg);
1079
1080 if (!(value & BYT_OUTPUT_EN))
1081 return GPIO_LINE_DIRECTION_OUT;
1082 if (!(value & BYT_INPUT_EN))
1083 return GPIO_LINE_DIRECTION_IN;
1084
1085 return -EINVAL;
1086}
1087
1088static int byt_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
1089{
1090 struct intel_pinctrl *vg = gpiochip_get_data(gc: chip);
1091 void __iomem *val_reg = byt_gpio_reg(vg, offset, BYT_VAL_REG);
1092 u32 reg;
1093
1094 guard(raw_spinlock_irqsave)(l: &byt_lock);
1095
1096 reg = readl(addr: val_reg);
1097 reg &= ~BYT_DIR_MASK;
1098 reg |= BYT_OUTPUT_EN;
1099 writel(val: reg, addr: val_reg);
1100
1101 return 0;
1102}
1103
1104/*
1105 * Note despite the temptation this MUST NOT be converted into a call to
1106 * pinctrl_gpio_direction_output() + byt_gpio_set() that does not work this
1107 * MUST be done as a single BYT_VAL_REG register write.
1108 * See the commit message of the commit adding this comment for details.
1109 */
1110static int byt_gpio_direction_output(struct gpio_chip *chip,
1111 unsigned int offset, int value)
1112{
1113 struct intel_pinctrl *vg = gpiochip_get_data(gc: chip);
1114 void __iomem *val_reg = byt_gpio_reg(vg, offset, BYT_VAL_REG);
1115 u32 reg;
1116
1117 guard(raw_spinlock_irqsave)(l: &byt_lock);
1118
1119 byt_gpio_direct_irq_check(vg, offset);
1120
1121 reg = readl(addr: val_reg);
1122 reg &= ~BYT_DIR_MASK;
1123 if (value)
1124 reg |= BYT_LEVEL;
1125 else
1126 reg &= ~BYT_LEVEL;
1127
1128 writel(val: reg, addr: val_reg);
1129
1130 return 0;
1131}
1132
1133static void byt_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
1134{
1135 struct intel_pinctrl *vg = gpiochip_get_data(gc: chip);
1136 int i;
1137 u32 conf0, val;
1138
1139 for (i = 0; i < vg->soc->npins; i++) {
1140 const struct intel_community *comm;
1141 void __iomem *conf_reg, *val_reg;
1142 const char *pull_str = NULL;
1143 const char *pull = NULL;
1144 unsigned int pin;
1145
1146 pin = vg->soc->pins[i].number;
1147
1148 conf_reg = byt_gpio_reg(vg, offset: pin, BYT_CONF0_REG);
1149 if (!conf_reg) {
1150 seq_printf(m: s, fmt: "Pin %i: can't retrieve CONF0\n", pin);
1151 continue;
1152 }
1153
1154 val_reg = byt_gpio_reg(vg, offset: pin, BYT_VAL_REG);
1155 if (!val_reg) {
1156 seq_printf(m: s, fmt: "Pin %i: can't retrieve VAL\n", pin);
1157 continue;
1158 }
1159
1160 scoped_guard(raw_spinlock_irqsave, &byt_lock) {
1161 conf0 = readl(addr: conf_reg);
1162 val = readl(addr: val_reg);
1163 }
1164
1165 comm = intel_get_community(pctrl: vg, pin);
1166 if (!comm) {
1167 seq_printf(m: s, fmt: "Pin %i: can't retrieve community\n", pin);
1168 continue;
1169 }
1170
1171 char *label __free(kfree) = gpiochip_dup_line_label(gc: chip, offset: i);
1172 if (IS_ERR(ptr: label))
1173 continue;
1174
1175 switch (conf0 & BYT_PULL_ASSIGN_MASK) {
1176 case BYT_PULL_ASSIGN_UP:
1177 pull = "up";
1178 break;
1179 case BYT_PULL_ASSIGN_DOWN:
1180 pull = "down";
1181 break;
1182 }
1183
1184 switch (conf0 & BYT_PULL_STR_MASK) {
1185 case BYT_PULL_STR_2K:
1186 pull_str = "2k";
1187 break;
1188 case BYT_PULL_STR_10K:
1189 pull_str = "10k";
1190 break;
1191 case BYT_PULL_STR_20K:
1192 pull_str = "20k";
1193 break;
1194 case BYT_PULL_STR_40K:
1195 pull_str = "40k";
1196 break;
1197 }
1198
1199 seq_printf(m: s,
1200 fmt: " gpio-%-3d (%-20.20s) %s %s %s pad-%-3d offset:0x%03x mux:%d %s%s%s",
1201 pin,
1202 label ?: "Unrequested",
1203 val & BYT_INPUT_EN ? " " : "in",
1204 val & BYT_OUTPUT_EN ? " " : "out",
1205 str_hi_lo(v: val & BYT_LEVEL),
1206 comm->pad_map[i], comm->pad_map[i] * 16,
1207 conf0 & 0x7,
1208 conf0 & BYT_TRIG_NEG ? " fall" : " ",
1209 conf0 & BYT_TRIG_POS ? " rise" : " ",
1210 conf0 & BYT_TRIG_LVL ? " level" : " ");
1211
1212 if (pull && pull_str)
1213 seq_printf(m: s, fmt: " %-4s %-3s", pull, pull_str);
1214 else
1215 seq_puts(m: s, s: " ");
1216
1217 if (conf0 & BYT_IODEN)
1218 seq_puts(m: s, s: " open-drain");
1219
1220 seq_puts(m: s, s: "\n");
1221 }
1222}
1223
1224static const struct gpio_chip byt_gpio_chip = {
1225 .owner = THIS_MODULE,
1226 .request = gpiochip_generic_request,
1227 .free = gpiochip_generic_free,
1228 .get_direction = byt_gpio_get_direction,
1229 .direction_input = byt_gpio_direction_input,
1230 .direction_output = byt_gpio_direction_output,
1231 .get = byt_gpio_get,
1232 .set = byt_gpio_set,
1233 .set_config = gpiochip_generic_config,
1234 .dbg_show = byt_gpio_dbg_show,
1235};
1236
1237static void byt_irq_ack(struct irq_data *d)
1238{
1239 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1240 struct intel_pinctrl *vg = gpiochip_get_data(gc);
1241 irq_hw_number_t hwirq = irqd_to_hwirq(d);
1242 void __iomem *reg;
1243
1244 reg = byt_gpio_reg(vg, offset: hwirq, BYT_INT_STAT_REG);
1245 if (!reg)
1246 return;
1247
1248 guard(raw_spinlock)(l: &byt_lock);
1249
1250 writel(BIT(hwirq % 32), addr: reg);
1251}
1252
1253static void byt_irq_mask(struct irq_data *d)
1254{
1255 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1256 struct intel_pinctrl *vg = gpiochip_get_data(gc);
1257 irq_hw_number_t hwirq = irqd_to_hwirq(d);
1258
1259 byt_gpio_clear_triggering(vg, offset: hwirq);
1260 gpiochip_disable_irq(gc, offset: hwirq);
1261}
1262
1263static void byt_irq_unmask(struct irq_data *d)
1264{
1265 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1266 struct intel_pinctrl *vg = gpiochip_get_data(gc);
1267 irq_hw_number_t hwirq = irqd_to_hwirq(d);
1268 void __iomem *reg;
1269 u32 value;
1270
1271 gpiochip_enable_irq(gc, offset: hwirq);
1272
1273 reg = byt_gpio_reg(vg, offset: hwirq, BYT_CONF0_REG);
1274 if (!reg)
1275 return;
1276
1277 guard(raw_spinlock_irqsave)(l: &byt_lock);
1278
1279 value = readl(addr: reg);
1280
1281 switch (irqd_get_trigger_type(d)) {
1282 case IRQ_TYPE_LEVEL_HIGH:
1283 value |= BYT_TRIG_LVL;
1284 fallthrough;
1285 case IRQ_TYPE_EDGE_RISING:
1286 value |= BYT_TRIG_POS;
1287 break;
1288 case IRQ_TYPE_LEVEL_LOW:
1289 value |= BYT_TRIG_LVL;
1290 fallthrough;
1291 case IRQ_TYPE_EDGE_FALLING:
1292 value |= BYT_TRIG_NEG;
1293 break;
1294 case IRQ_TYPE_EDGE_BOTH:
1295 value |= (BYT_TRIG_NEG | BYT_TRIG_POS);
1296 break;
1297 }
1298
1299 writel(val: value, addr: reg);
1300}
1301
1302static int byt_irq_type(struct irq_data *d, unsigned int type)
1303{
1304 struct intel_pinctrl *vg = gpiochip_get_data(gc: irq_data_get_irq_chip_data(d));
1305 irq_hw_number_t hwirq = irqd_to_hwirq(d);
1306 void __iomem *reg;
1307 u32 value;
1308
1309 reg = byt_gpio_reg(vg, offset: hwirq, BYT_CONF0_REG);
1310 if (!reg)
1311 return -EINVAL;
1312
1313 guard(raw_spinlock_irqsave)(l: &byt_lock);
1314
1315 value = readl(addr: reg);
1316
1317 WARN(value & BYT_DIRECT_IRQ_EN,
1318 "Bad pad config for IO mode, force DIRECT_IRQ_EN bit clearing");
1319
1320 /* For level trigges the BYT_TRIG_POS and BYT_TRIG_NEG bits
1321 * are used to indicate high and low level triggering
1322 */
1323 value &= ~(BYT_DIRECT_IRQ_EN | BYT_TRIG_POS | BYT_TRIG_NEG |
1324 BYT_TRIG_LVL);
1325 /* Enable glitch filtering */
1326 value |= BYT_GLITCH_FILTER_EN | BYT_GLITCH_F_SLOW_CLK |
1327 BYT_GLITCH_F_FAST_CLK;
1328
1329 writel(val: value, addr: reg);
1330
1331 if (type & IRQ_TYPE_EDGE_BOTH)
1332 irq_set_handler_locked(data: d, handler: handle_edge_irq);
1333 else if (type & IRQ_TYPE_LEVEL_MASK)
1334 irq_set_handler_locked(data: d, handler: handle_level_irq);
1335
1336 return 0;
1337}
1338
1339static const struct irq_chip byt_gpio_irq_chip = {
1340 .name = "BYT-GPIO",
1341 .irq_ack = byt_irq_ack,
1342 .irq_mask = byt_irq_mask,
1343 .irq_unmask = byt_irq_unmask,
1344 .irq_set_type = byt_irq_type,
1345 .flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_SET_TYPE_MASKED | IRQCHIP_IMMUTABLE,
1346 GPIOCHIP_IRQ_RESOURCE_HELPERS,
1347};
1348
1349static void byt_gpio_irq_handler(struct irq_desc *desc)
1350{
1351 struct irq_data *data = irq_desc_get_irq_data(desc);
1352 struct intel_pinctrl *vg = gpiochip_get_data(gc: irq_desc_get_handler_data(desc));
1353 struct irq_chip *chip = irq_data_get_irq_chip(d: data);
1354 u32 base, pin;
1355 void __iomem *reg;
1356 unsigned long pending;
1357
1358 chained_irq_enter(chip, desc);
1359
1360 /* check from GPIO controller which pin triggered the interrupt */
1361 for (base = 0; base < vg->chip.ngpio; base += 32) {
1362 reg = byt_gpio_reg(vg, offset: base, BYT_INT_STAT_REG);
1363
1364 if (!reg) {
1365 dev_warn(vg->dev, "Pin %i: can't retrieve INT_STAT%u\n", base / 32, base);
1366 continue;
1367 }
1368
1369 scoped_guard(raw_spinlock, &byt_lock)
1370 pending = readl(addr: reg);
1371 for_each_set_bit(pin, &pending, 32)
1372 generic_handle_domain_irq(domain: vg->chip.irq.domain, hwirq: base + pin);
1373 }
1374
1375 chained_irq_exit(chip, desc);
1376}
1377
1378static bool byt_direct_irq_sanity_check(struct intel_pinctrl *vg, int pin, u32 conf0)
1379{
1380 int direct_irq, ioapic_direct_irq_base;
1381 u8 *match, direct_irq_mux[16];
1382 u32 trig;
1383
1384 memcpy_fromio(direct_irq_mux, vg->communities->pad_regs + BYT_DIRECT_IRQ_REG,
1385 sizeof(direct_irq_mux));
1386 match = memchr(p: direct_irq_mux, c: pin, size: sizeof(direct_irq_mux));
1387 if (!match) {
1388 dev_warn(vg->dev, FW_BUG "Pin %i: DIRECT_IRQ_EN set but no IRQ assigned, clearing\n", pin);
1389 return false;
1390 }
1391
1392 direct_irq = match - direct_irq_mux;
1393 /* Base IO-APIC pin numbers come from atom-e3800-family-datasheet.pdf */
1394 ioapic_direct_irq_base = (vg->communities->npins == BYT_NGPIO_SCORE) ? 51 : 67;
1395 dev_dbg(vg->dev, "Pin %i: uses direct IRQ %d (IO-APIC %d)\n", pin,
1396 direct_irq, direct_irq + ioapic_direct_irq_base);
1397
1398 /*
1399 * Testing has shown that the way direct IRQs work is that the combination of the
1400 * direct-irq-en flag and the direct IRQ mux connect the output of the GPIO's IRQ
1401 * trigger block, which normally sets the status flag in the IRQ status reg at
1402 * 0x800, to one of the IO-APIC pins according to the mux registers.
1403 *
1404 * This means that:
1405 * 1. The TRIG_MASK bits must be set to configure the GPIO's IRQ trigger block
1406 * 2. The TRIG_LVL bit *must* be set, so that the GPIO's input value is directly
1407 * passed (1:1 or inverted) to the IO-APIC pin, if TRIG_LVL is not set,
1408 * selecting edge mode operation then on the first edge the IO-APIC pin goes
1409 * high, but since no write-to-clear write will be done to the IRQ status reg
1410 * at 0x800, the detected edge condition will never get cleared.
1411 */
1412 trig = conf0 & BYT_TRIG_MASK;
1413 if (trig != (BYT_TRIG_POS | BYT_TRIG_LVL) &&
1414 trig != (BYT_TRIG_NEG | BYT_TRIG_LVL)) {
1415 dev_warn(vg->dev,
1416 FW_BUG "Pin %i: DIRECT_IRQ_EN set without trigger (CONF0: %#08x), clearing\n",
1417 pin, conf0);
1418 return false;
1419 }
1420
1421 return true;
1422}
1423
1424static void byt_init_irq_valid_mask(struct gpio_chip *chip,
1425 unsigned long *valid_mask,
1426 unsigned int ngpios)
1427{
1428 struct intel_pinctrl *vg = gpiochip_get_data(gc: chip);
1429 void __iomem *reg;
1430 u32 value;
1431 int i;
1432
1433 /*
1434 * Clear interrupt triggers for all pins that are GPIOs and
1435 * do not use direct IRQ mode. This will prevent spurious
1436 * interrupts from misconfigured pins.
1437 */
1438 for (i = 0; i < vg->soc->npins; i++) {
1439 unsigned int pin = vg->soc->pins[i].number;
1440
1441 reg = byt_gpio_reg(vg, offset: pin, BYT_CONF0_REG);
1442 if (!reg) {
1443 dev_warn(vg->dev, "Pin %i: could not retrieve CONF0\n", i);
1444 continue;
1445 }
1446
1447 value = readl(addr: reg);
1448 if (value & BYT_DIRECT_IRQ_EN) {
1449 if (byt_direct_irq_sanity_check(vg, pin: i, conf0: value)) {
1450 clear_bit(nr: i, addr: valid_mask);
1451 } else {
1452 value &= ~(BYT_DIRECT_IRQ_EN | BYT_TRIG_POS |
1453 BYT_TRIG_NEG | BYT_TRIG_LVL);
1454 writel(val: value, addr: reg);
1455 }
1456 } else if ((value & BYT_PIN_MUX) == byt_get_gpio_mux(vg, offset: i)) {
1457 byt_gpio_clear_triggering(vg, offset: i);
1458 dev_dbg(vg->dev, "disabling GPIO %d\n", i);
1459 }
1460 }
1461}
1462
1463static int byt_gpio_irq_init_hw(struct gpio_chip *chip)
1464{
1465 struct intel_pinctrl *vg = gpiochip_get_data(gc: chip);
1466 void __iomem *reg;
1467 u32 base, value;
1468
1469 /* clear interrupt status trigger registers */
1470 for (base = 0; base < vg->soc->npins; base += 32) {
1471 reg = byt_gpio_reg(vg, offset: base, BYT_INT_STAT_REG);
1472
1473 if (!reg) {
1474 dev_warn(vg->dev, "Pin %i: can't retrieve INT_STAT%u\n", base / 32, base);
1475 continue;
1476 }
1477
1478 writel(val: 0xffffffff, addr: reg);
1479 /* make sure trigger bits are cleared, if not then a pin
1480 might be misconfigured in bios */
1481 value = readl(addr: reg);
1482 if (value)
1483 dev_err(vg->dev,
1484 "GPIO interrupt error, pins misconfigured. INT_STAT%u: %#08x\n",
1485 base / 32, value);
1486 }
1487
1488 return 0;
1489}
1490
1491static int byt_gpio_add_pin_ranges(struct gpio_chip *chip)
1492{
1493 struct intel_pinctrl *vg = gpiochip_get_data(gc: chip);
1494 struct device *dev = vg->dev;
1495 int ret;
1496
1497 ret = gpiochip_add_pin_range(gc: chip, pinctl_name: dev_name(dev), gpio_offset: 0, pin_offset: 0, npins: vg->soc->npins);
1498 if (ret)
1499 dev_err(dev, "failed to add GPIO pin range\n");
1500
1501 return ret;
1502}
1503
1504static int byt_gpio_probe(struct intel_pinctrl *vg)
1505{
1506 struct platform_device *pdev = to_platform_device(vg->dev);
1507 struct gpio_chip *gc;
1508 int irq, ret;
1509
1510 /* Set up gpio chip */
1511 vg->chip = byt_gpio_chip;
1512 gc = &vg->chip;
1513 gc->label = dev_name(dev: vg->dev);
1514 gc->base = -1;
1515 gc->can_sleep = false;
1516 gc->add_pin_ranges = byt_gpio_add_pin_ranges;
1517 gc->parent = vg->dev;
1518 gc->ngpio = vg->soc->npins;
1519
1520#ifdef CONFIG_PM_SLEEP
1521 vg->context.pads = devm_kcalloc(dev: vg->dev, n: gc->ngpio, size: sizeof(*vg->context.pads),
1522 GFP_KERNEL);
1523 if (!vg->context.pads)
1524 return -ENOMEM;
1525#endif
1526
1527 /* set up interrupts */
1528 irq = platform_get_irq_optional(pdev, 0);
1529 if (irq > 0) {
1530 struct gpio_irq_chip *girq;
1531
1532 girq = &gc->irq;
1533 gpio_irq_chip_set_chip(girq, chip: &byt_gpio_irq_chip);
1534 girq->init_hw = byt_gpio_irq_init_hw;
1535 girq->init_valid_mask = byt_init_irq_valid_mask;
1536 girq->parent_handler = byt_gpio_irq_handler;
1537 girq->num_parents = 1;
1538 girq->parents = devm_kcalloc(dev: vg->dev, n: girq->num_parents,
1539 size: sizeof(*girq->parents), GFP_KERNEL);
1540 if (!girq->parents)
1541 return -ENOMEM;
1542 girq->parents[0] = irq;
1543 girq->default_type = IRQ_TYPE_NONE;
1544 girq->handler = handle_bad_irq;
1545 }
1546
1547 ret = devm_gpiochip_add_data(vg->dev, gc, vg);
1548 if (ret)
1549 dev_err(vg->dev, "failed adding byt-gpio chip\n");
1550
1551 return ret;
1552}
1553
1554static int byt_set_soc_data(struct intel_pinctrl *vg,
1555 const struct intel_pinctrl_soc_data *soc)
1556{
1557 struct platform_device *pdev = to_platform_device(vg->dev);
1558 int i;
1559
1560 vg->soc = soc;
1561
1562 vg->ncommunities = vg->soc->ncommunities;
1563 vg->communities = devm_kmemdup_array(dev: vg->dev, src: vg->soc->communities, n: vg->ncommunities,
1564 size: sizeof(*vg->soc->communities), GFP_KERNEL);
1565 if (!vg->communities)
1566 return -ENOMEM;
1567
1568 for (i = 0; i < vg->soc->ncommunities; i++) {
1569 struct intel_community *comm = vg->communities + i;
1570
1571 comm->pad_regs = devm_platform_ioremap_resource(pdev, index: 0);
1572 if (IS_ERR(ptr: comm->pad_regs))
1573 return PTR_ERR(ptr: comm->pad_regs);
1574 }
1575
1576 return 0;
1577}
1578
1579static const struct acpi_device_id byt_gpio_acpi_match[] = {
1580 { "INT33B2", (kernel_ulong_t)byt_soc_data },
1581 { "INT33FC", (kernel_ulong_t)byt_soc_data },
1582 { }
1583};
1584
1585static int byt_pinctrl_probe(struct platform_device *pdev)
1586{
1587 const struct intel_pinctrl_soc_data *soc_data;
1588 struct device *dev = &pdev->dev;
1589 struct intel_pinctrl *vg;
1590 int ret;
1591
1592 soc_data = intel_pinctrl_get_soc_data(pdev);
1593 if (IS_ERR(ptr: soc_data))
1594 return PTR_ERR(ptr: soc_data);
1595
1596 vg = devm_kzalloc(dev, size: sizeof(*vg), GFP_KERNEL);
1597 if (!vg)
1598 return -ENOMEM;
1599
1600 vg->dev = dev;
1601 ret = byt_set_soc_data(vg, soc: soc_data);
1602 if (ret) {
1603 dev_err(dev, "failed to set soc data\n");
1604 return ret;
1605 }
1606
1607 vg->pctldesc = byt_pinctrl_desc;
1608 vg->pctldesc.name = dev_name(dev);
1609 vg->pctldesc.pins = vg->soc->pins;
1610 vg->pctldesc.npins = vg->soc->npins;
1611
1612 vg->pctldev = devm_pinctrl_register(dev, pctldesc: &vg->pctldesc, driver_data: vg);
1613 if (IS_ERR(ptr: vg->pctldev)) {
1614 dev_err(dev, "failed to register pinctrl driver\n");
1615 return PTR_ERR(ptr: vg->pctldev);
1616 }
1617
1618 ret = byt_gpio_probe(vg);
1619 if (ret)
1620 return ret;
1621
1622 platform_set_drvdata(pdev, data: vg);
1623
1624 return 0;
1625}
1626
1627static int byt_gpio_suspend(struct device *dev)
1628{
1629 struct intel_pinctrl *vg = dev_get_drvdata(dev);
1630 int i;
1631
1632 guard(raw_spinlock_irqsave)(l: &byt_lock);
1633
1634 for (i = 0; i < vg->soc->npins; i++) {
1635 void __iomem *reg;
1636 u32 value;
1637 unsigned int pin = vg->soc->pins[i].number;
1638
1639 reg = byt_gpio_reg(vg, offset: pin, BYT_CONF0_REG);
1640 if (!reg) {
1641 dev_warn(vg->dev, "Pin %i: can't retrieve CONF0\n", i);
1642 continue;
1643 }
1644 value = readl(addr: reg) & BYT_CONF0_RESTORE_MASK;
1645 vg->context.pads[i].conf0 = value;
1646
1647 reg = byt_gpio_reg(vg, offset: pin, BYT_VAL_REG);
1648 if (!reg) {
1649 dev_warn(vg->dev, "Pin %i: can't retrieve VAL\n", i);
1650 continue;
1651 }
1652 value = readl(addr: reg) & BYT_VAL_RESTORE_MASK;
1653 vg->context.pads[i].val = value;
1654 }
1655
1656 return 0;
1657}
1658
1659static int byt_gpio_resume(struct device *dev)
1660{
1661 struct intel_pinctrl *vg = dev_get_drvdata(dev);
1662 int i;
1663
1664 guard(raw_spinlock_irqsave)(l: &byt_lock);
1665
1666 for (i = 0; i < vg->soc->npins; i++) {
1667 void __iomem *reg;
1668 u32 value;
1669 unsigned int pin = vg->soc->pins[i].number;
1670
1671 reg = byt_gpio_reg(vg, offset: pin, BYT_CONF0_REG);
1672 if (!reg) {
1673 dev_warn(vg->dev, "Pin %i: can't retrieve CONF0\n", i);
1674 continue;
1675 }
1676 value = readl(addr: reg);
1677 if ((value & BYT_CONF0_RESTORE_MASK) !=
1678 vg->context.pads[i].conf0) {
1679 value &= ~BYT_CONF0_RESTORE_MASK;
1680 value |= vg->context.pads[i].conf0;
1681 writel(val: value, addr: reg);
1682 dev_info(dev, "restored pin %d CONF0 %#08x", i, value);
1683 }
1684
1685 reg = byt_gpio_reg(vg, offset: pin, BYT_VAL_REG);
1686 if (!reg) {
1687 dev_warn(vg->dev, "Pin %i: can't retrieve VAL\n", i);
1688 continue;
1689 }
1690 value = readl(addr: reg);
1691 if ((value & BYT_VAL_RESTORE_MASK) !=
1692 vg->context.pads[i].val) {
1693 u32 v;
1694
1695 v = value & ~BYT_VAL_RESTORE_MASK;
1696 v |= vg->context.pads[i].val;
1697 if (v != value) {
1698 writel(val: v, addr: reg);
1699 dev_dbg(dev, "restored pin %d VAL %#08x\n", i, v);
1700 }
1701 }
1702 }
1703
1704 return 0;
1705}
1706
1707static const struct dev_pm_ops byt_gpio_pm_ops = {
1708 LATE_SYSTEM_SLEEP_PM_OPS(byt_gpio_suspend, byt_gpio_resume)
1709};
1710
1711static struct platform_driver byt_gpio_driver = {
1712 .probe = byt_pinctrl_probe,
1713 .driver = {
1714 .name = "byt_gpio",
1715 .pm = pm_sleep_ptr(&byt_gpio_pm_ops),
1716 .acpi_match_table = byt_gpio_acpi_match,
1717 .suppress_bind_attrs = true,
1718 },
1719};
1720
1721static int __init byt_gpio_init(void)
1722{
1723 return platform_driver_register(&byt_gpio_driver);
1724}
1725subsys_initcall(byt_gpio_init);
1726
1727MODULE_IMPORT_NS("PINCTRL_INTEL");
1728

source code of linux/drivers/pinctrl/intel/pinctrl-baytrail.c