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regulator: cp9314: Prevents reset while switching

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Configures and initializes the EN GPIO to inactive prior
to calling the soft reset sequence during probe. The EN
pin may have been left asserted by the hardware on some systems.

Signed-off-by: Ricardo Rivera-Matos <rriveram@opensource.cirrus.com>
This commit is contained in:
Ricardo Rivera-Matos 2024-03-18 21:56:38 +00:00 committed by David Leach
parent dbbe9d07b5
commit 64a959c922
1 changed files with 18 additions and 11 deletions
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29
drivers/regulator/regulator_cp9314.c
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@ -155,6 +155,7 @@ LOG_MODULE_REGISTER(CP9314, CONFIG_REGULATOR_LOG_LEVEL);
#define CP9314_STS_ADDR_LVL GENMASK(3, 0) #define CP9314_STS_ADDR_LVL GENMASK(3, 0)
#define CP9314_SOFT_RESET_DELAY_MSEC 200 #define CP9314_SOFT_RESET_DELAY_MSEC 200
#define CP9314_EN_DEBOUNCE_USEC 3000
#define CP9314_DEVICE_MODE_HOST_4GANG_0x78 0x0 #define CP9314_DEVICE_MODE_HOST_4GANG_0x78 0x0
#define CP9314_DEVICE_MODE_HOST_4GANG_0x72 0x1 #define CP9314_DEVICE_MODE_HOST_4GANG_0x72 0x1
@ -410,6 +411,23 @@ static int regulator_cp9314_init(const struct device *dev)
return -ENOTSUP; return -ENOTSUP;
} }
if (config->en_pin.port != NULL) {
if (!gpio_is_ready_dt(&config->en_pin)) {
return -ENODEV;
}
ret = gpio_pin_configure_dt(&config->en_pin, GPIO_OUTPUT_INACTIVE);
if (ret < 0) {
return ret;
}
#ifdef CONFIG_MULTITHREADING
k_usleep(CP9314_EN_DEBOUNCE_USEC);
#else
k_busy_wait(CP9314_EN_DEBOUNCE_USEC);
#endif
}
ret = cp9314_do_soft_reset(dev); ret = cp9314_do_soft_reset(dev);
if (ret < 0) { if (ret < 0) {
return ret; return ret;
@ -440,17 +458,6 @@ static int regulator_cp9314_init(const struct device *dev)
return ret; return ret;
} }
if (config->en_pin.port != NULL) {
if (!gpio_is_ready_dt(&config->en_pin)) {
return -ENODEV;
}
ret = gpio_pin_configure_dt(&config->en_pin, GPIO_OUTPUT_INACTIVE);
if (ret < 0) {
return ret;
}
}
ret = i2c_reg_update_byte_dt(&config->i2c, CP9314_REG_CTRL4, CP9314_FRC_OP_MODE, ret = i2c_reg_update_byte_dt(&config->i2c, CP9314_REG_CTRL4, CP9314_FRC_OP_MODE,
CP9314_FRC_OP_MODE); CP9314_FRC_OP_MODE);
if (ret < 0) { if (ret < 0) {