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ITE: drivers/i2c: Add a property selecting to drive I2C recovery mode

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Add a property to select the push-pull GPIO output type to drive the
I2C recovery. The default is open-drain.

Signed-off-by: Tim Lin <tim2.lin@ite.corp-partner.google.com>
This commit is contained in:
Tim Lin 2024-03-21 16:30:38 +08:00 committed by Fabio Baltieri
parent 9a133aedcc
commit 0967f13c3f
3 changed files with 18 additions and 4 deletions
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8
drivers/i2c/i2c_ite_enhance.c
View file

@ -75,6 +75,7 @@ struct i2c_enhance_config {
uint32_t clock_gate_offset;
bool target_enable;
bool target_pio_mode;
bool push_pull_recovery;
};
enum i2c_pin_fun {
@ -1267,10 +1268,12 @@ static int i2c_enhance_recover_bus(const struct device *dev)
const struct i2c_enhance_config *config = dev->config;
int i, status;
/* Output type selection */
gpio_flags_t flags = GPIO_OUTPUT | (config->push_pull_recovery ? 0 : GPIO_OPEN_DRAIN);
/* Set SCL of I2C as GPIO pin */
gpio_pin_configure_dt(&config->scl_gpios, GPIO_OUTPUT | GPIO_OPEN_DRAIN);
gpio_pin_configure_dt(&config->scl_gpios, flags);
/* Set SDA of I2C as GPIO pin */
gpio_pin_configure_dt(&config->sda_gpios, GPIO_OUTPUT | GPIO_OPEN_DRAIN);
gpio_pin_configure_dt(&config->sda_gpios, flags);
/*
* In I2C recovery bus, 1ms sleep interval for bitbanging i2c
@ -1492,6 +1495,7 @@ BUILD_ASSERT(IS_ENABLED(CONFIG_I2C_TARGET_BUFFER_MODE),
.pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(inst), \
.target_enable = DT_INST_PROP(inst, target_enable), \
.target_pio_mode = DT_INST_PROP(inst, target_pio_mode), \
.push_pull_recovery = DT_INST_PROP(inst, push_pull_recovery), \
}; \
\
static struct i2c_enhance_data i2c_enhance_data_##inst; \

8
drivers/i2c/i2c_ite_it8xxx2.c
View file

@ -53,6 +53,7 @@ struct i2c_it8xxx2_config {
const struct pinctrl_dev_config *pcfg;
uint32_t clock_gate_offset;
bool fifo_enable;
bool push_pull_recovery;
};
enum i2c_pin_fun {
@ -1190,10 +1191,12 @@ static int i2c_it8xxx2_recover_bus(const struct device *dev)
const struct i2c_it8xxx2_config *config = dev->config;
int i, status;
/* Output type selection */
gpio_flags_t flags = GPIO_OUTPUT | (config->push_pull_recovery ? 0 : GPIO_OPEN_DRAIN);
/* Set SCL of I2C as GPIO pin */
gpio_pin_configure_dt(&config->scl_gpios, GPIO_OUTPUT | GPIO_OPEN_DRAIN);
gpio_pin_configure_dt(&config->scl_gpios, flags);
/* Set SDA of I2C as GPIO pin */
gpio_pin_configure_dt(&config->sda_gpios, GPIO_OUTPUT | GPIO_OPEN_DRAIN);
gpio_pin_configure_dt(&config->sda_gpios, flags);
/*
* In I2C recovery bus, 1ms sleep interval for bitbanging i2c
@ -1302,6 +1305,7 @@ DT_INST_FOREACH_STATUS_OKAY(I2C_IT8XXX2_CHECK_SUPPORTED_CLOCK)
.clock_gate_offset = DT_INST_PROP(inst, clock_gate_offset), \
.pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(inst), \
.fifo_enable = DT_INST_PROP(inst, fifo_enable), \
.push_pull_recovery = DT_INST_PROP(inst, push_pull_recovery), \
}; \
\
static struct i2c_it8xxx2_data i2c_it8xxx2_data_##inst; \

6
dts/bindings/i2c/ite,common-i2c.yaml
View file

@ -102,3 +102,9 @@ properties:
pinctrl-names:
required: true
push-pull-recovery:
type: boolean
description: |
This property is enabled when selecting the push-pull GPIO output
type to drive the I2C recovery. The default is open-drain.