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drivers: i3c: i3c_dw: add pinctrl support

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Adds pinctrl support on init and on PM actions. General PM support is added
to the driver to enable the later.

Signed-off-by: Corey Wharton <xodus7@cwharton.com>
This commit is contained in:
Corey Wharton 2025-03-11 14:12:32 -07:00 committed by Benjamin Cabé
parent c6bc09223e
commit 6ed98bfc42
1 changed files with 72 additions and 3 deletions
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75
drivers/i3c/i3c_dw.c
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@ -8,9 +8,14 @@
#include <zephyr/logging/log.h>
#include <zephyr/drivers/i3c.h>
#include <zephyr/drivers/clock_control.h>
#include <zephyr/pm/device.h>
#include <zephyr/sys/util.h>
#include <assert.h>
#if defined(CONFIG_PINCTRL)
#include <zephyr/drivers/pinctrl.h>
#endif
#define NANO_SEC 1000000000ULL
#define BYTES_PER_DWORD 4
@ -365,6 +370,10 @@ struct dw_i3c_config {
uint32_t od_tlow_min_ns;
void (*irq_config_func)();
#if defined(CONFIG_PINCTRL)
const struct pinctrl_dev_config *pcfg;
#endif
};
struct dw_i3c_data {
@ -2204,6 +2213,27 @@ static int dw_i3c_target_unregister(const struct device *dev, struct i3c_target_
return 0;
}
static int dw_i3c_pinctrl_enable(const struct device *dev, bool enable)
{
#ifdef CONFIG_PINCTRL
const struct dw_i3c_config *config = dev->config;
uint8_t state = enable ? PINCTRL_STATE_DEFAULT : PINCTRL_STATE_SLEEP;
int ret;
ret = pinctrl_apply_state(config->pcfg, state);
if (ret == -ENOENT) {
/* State not defined; ignore and return success. */
ret = 0;
}
return ret;
#else
ARG_UNUSED(dev);
ARG_UNUSED(enable);
return 0;
#endif
}
static int dw_i3c_init(const struct device *dev)
{
const struct dw_i3c_config *config = dev->config;
@ -2229,6 +2259,8 @@ static int dw_i3c_init(const struct device *dev)
k_sem_init(&data->sem_xfer, 0, 1);
k_mutex_init(&data->mt);
dw_i3c_pinctrl_enable(dev, true);
data->mode = i3c_bus_mode(&config->common.dev_list);
/* reset all */
@ -2309,6 +2341,32 @@ static int dw_i3c_init(const struct device *dev)
return 0;
}
#if defined(CONFIG_PM_DEVICE)
static int dw_i3c_pm_ctrl(const struct device *dev, enum pm_device_action action)
{
const struct dw_i3c_config *config = dev->config;
LOG_DBG("PM action: %d", (int)action);
switch (action) {
case PM_DEVICE_ACTION_SUSPEND:
dw_i3c_enable_controller(config, false);
dw_i3c_pinctrl_enable(dev, false);
break;
case PM_DEVICE_ACTION_RESUME:
dw_i3c_pinctrl_enable(dev, true);
dw_i3c_enable_controller(config, true);
break;
default:
return -ENOTSUP;
}
return 0;
}
#endif
static DEVICE_API(i3c, dw_i3c_api) = {
.i2c_api.transfer = dw_i3c_i2c_api_transfer,
@ -2348,8 +2406,17 @@ static DEVICE_API(i3c, dw_i3c_api) = {
irq_enable(DT_INST_IRQN(n)); \
}
#if defined(CONFIG_PINCTRL)
#define I3C_DW_PINCTRL_DEFINE(n) PINCTRL_DT_INST_DEFINE(n)
#define I3C_DW_PINCTRL_INIT(n) .pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(n),
#else
#define I3C_DW_PINCTRL_DEFINE(n)
#define I3C_DW_PINCTRL_INIT(n)
#endif
#define DEFINE_DEVICE_FN(n) \
I3C_DW_IRQ_HANDLER(n) \
I3C_DW_PINCTRL_DEFINE(n); \
static struct i3c_device_desc dw_i3c_device_array_##n[] = I3C_DEVICE_ARRAY_DT_INST(n); \
static struct i3c_i2c_device_desc dw_i3c_i2c_device_array_##n[] = \
I3C_I2C_DEVICE_ARRAY_DT_INST(n); \
@ -2368,9 +2435,11 @@ static DEVICE_API(i3c, dw_i3c_api) = {
.common.dev_list.num_i3c = ARRAY_SIZE(dw_i3c_device_array_##n), \
.common.dev_list.i2c = dw_i3c_i2c_device_array_##n, \
.common.dev_list.num_i2c = ARRAY_SIZE(dw_i3c_i2c_device_array_##n), \
}; \
DEVICE_DT_INST_DEFINE(n, dw_i3c_init, NULL, &dw_i3c_data_##n, &dw_i3c_cfg_##n, \
POST_KERNEL, CONFIG_I3C_CONTROLLER_INIT_PRIORITY, &dw_i3c_api);
I3C_DW_PINCTRL_INIT(n)}; \
PM_DEVICE_DT_INST_DEFINE(n, dw_i3c_pm_action); \
DEVICE_DT_INST_DEFINE(n, dw_i3c_init, PM_DEVICE_DT_INST_GET(n), &dw_i3c_data_##n, \
&dw_i3c_cfg_##n, POST_KERNEL, CONFIG_I3C_CONTROLLER_INIT_PRIORITY, \
&dw_i3c_api);
#define DT_DRV_COMPAT snps_designware_i3c
DT_INST_FOREACH_STATUS_OKAY(DEFINE_DEVICE_FN);