diff options
Diffstat (limited to 'drivers/mfd/lp87565.c')
| -rw-r--r-- | drivers/mfd/lp87565.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/drivers/mfd/lp87565.c b/drivers/mfd/lp87565.c index 4a5c8ade4ae0..a52ab76febb3 100644 --- a/drivers/mfd/lp87565.c +++ b/drivers/mfd/lp87565.c @@ -1,10 +1,11 @@ // SPDX-License-Identifier: GPL-2.0-only /* - * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/ + * Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/ * * Author: Keerthy <j-keerthy@ti.com> */ +#include <linux/gpio/consumer.h> #include <linux/interrupt.h> #include <linux/mfd/core.h> #include <linux/module.h> @@ -27,6 +28,10 @@ static const struct mfd_cell lp87565_cells[] = { static const struct of_device_id of_lp87565_match_table[] = { { .compatible = "ti,lp87565", }, { + .compatible = "ti,lp87524-q1", + .data = (void *)LP87565_DEVICE_TYPE_LP87524_Q1, + }, + { .compatible = "ti,lp87565-q1", .data = (void *)LP87565_DEVICE_TYPE_LP87565_Q1, }, @@ -60,6 +65,24 @@ static int lp87565_probe(struct i2c_client *client, return ret; } + lp87565->reset_gpio = devm_gpiod_get_optional(lp87565->dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(lp87565->reset_gpio)) { + ret = PTR_ERR(lp87565->reset_gpio); + if (ret == -EPROBE_DEFER) + return ret; + } + + if (lp87565->reset_gpio) { + gpiod_set_value_cansleep(lp87565->reset_gpio, 1); + /* The minimum assertion time is undocumented, just guess */ + usleep_range(2000, 4000); + + gpiod_set_value_cansleep(lp87565->reset_gpio, 0); + /* Min 1.2 ms before first I2C transaction */ + usleep_range(1500, 3000); + } + ret = regmap_read(lp87565->regmap, LP87565_REG_OTP_REV, &otpid); if (ret) { dev_err(lp87565->dev, "Failed to read OTP ID\n"); @@ -79,6 +102,13 @@ static int lp87565_probe(struct i2c_client *client, NULL, 0, NULL); } +static void lp87565_shutdown(struct i2c_client *client) +{ + struct lp87565 *lp87565 = i2c_get_clientdata(client); + + gpiod_set_value_cansleep(lp87565->reset_gpio, 1); +} + static const struct i2c_device_id lp87565_id_table[] = { { "lp87565-q1", 0 }, { }, @@ -91,6 +121,7 @@ static struct i2c_driver lp87565_driver = { .of_match_table = of_lp87565_match_table, }, .probe = lp87565_probe, + .shutdown = lp87565_shutdown, .id_table = lp87565_id_table, }; module_i2c_driver(lp87565_driver); |