| 1 | // SPDX-License-Identifier: GPL-2.0+ |
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| 2 | /* |
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| 3 | * Hardware monitoring driver for STMicroelectronics digital controller PM6764TR |
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| 4 | */ |
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| 5 | |
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| 6 | #include <linux/err.h> |
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| 7 | #include <linux/i2c.h> |
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| 8 | #include <linux/init.h> |
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| 9 | #include <linux/kernel.h> |
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| 10 | #include <linux/module.h> |
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| 11 | #include <linux/pmbus.h> |
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| 12 | #include "pmbus.h" |
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| 13 | |
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| 14 | #define PM6764TR_PMBUS_READ_VOUT 0xD4 |
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| 15 | |
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| 16 | static int pm6764tr_read_word_data(struct i2c_client *client, int page, int phase, int reg) |
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| 17 | { |
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| 18 | int ret; |
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| 19 | |
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| 20 | switch (reg) { |
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| 21 | case PMBUS_VIRT_READ_VMON: |
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| 22 | ret = pmbus_read_word_data(client, page, phase, PM6764TR_PMBUS_READ_VOUT); |
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| 23 | break; |
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| 24 | default: |
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| 25 | ret = -ENODATA; |
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| 26 | break; |
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| 27 | } |
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| 28 | return ret; |
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| 29 | } |
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| 30 | |
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| 31 | static struct pmbus_driver_info pm6764tr_info = { |
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| 32 | .pages = 1, |
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| 33 | .format[PSC_VOLTAGE_IN] = linear, |
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| 34 | .format[PSC_VOLTAGE_OUT] = vid, |
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| 35 | .format[PSC_TEMPERATURE] = linear, |
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| 36 | .format[PSC_CURRENT_OUT] = linear, |
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| 37 | .format[PSC_POWER] = linear, |
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| 38 | .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN | PMBUS_HAVE_PIN | |
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| 39 | PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | PMBUS_HAVE_VMON | |
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| 40 | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_VOUT | |
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| 41 | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
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| 42 | .read_word_data = pm6764tr_read_word_data, |
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| 43 | }; |
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| 44 | |
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| 45 | static int pm6764tr_probe(struct i2c_client *client) |
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| 46 | { |
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| 47 | return pmbus_do_probe(client, info: &pm6764tr_info); |
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| 48 | } |
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| 49 | |
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| 50 | static const struct i2c_device_id pm6764tr_id[] = { |
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| 51 | {"pm6764tr" , 0}, |
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| 52 | {} |
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| 53 | }; |
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| 54 | MODULE_DEVICE_TABLE(i2c, pm6764tr_id); |
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| 55 | |
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| 56 | static const struct of_device_id __maybe_unused pm6764tr_of_match[] = { |
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| 57 | {.compatible = "st,pm6764tr" }, |
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| 58 | {} |
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| 59 | }; |
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| 60 | |
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| 61 | /* This is the driver that will be inserted */ |
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| 62 | static struct i2c_driver pm6764tr_driver = { |
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| 63 | .driver = { |
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| 64 | .name = "pm6764tr" , |
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| 65 | .of_match_table = of_match_ptr(pm6764tr_of_match), |
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| 66 | }, |
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| 67 | .probe = pm6764tr_probe, |
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| 68 | .id_table = pm6764tr_id, |
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| 69 | }; |
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| 70 | |
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| 71 | module_i2c_driver(pm6764tr_driver); |
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| 72 | |
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| 73 | MODULE_AUTHOR("Charles Hsu" ); |
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| 74 | MODULE_DESCRIPTION("PMBus driver for ST PM6764TR" ); |
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| 75 | MODULE_LICENSE("GPL" ); |
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| 76 | MODULE_IMPORT_NS(PMBUS); |
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| 77 | |
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