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drivers: spi: cc13xx_cc26xx: add power management support

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Add a dependency on the SSI resource in the TI Power module, and add
support for device PM.

Signed-off-by: Vincent Wan <vincent.wan@linaro.org>
This commit is contained in:
Vincent Wan 2019-11-01 11:16:56 -07:00 • committed by Anas Nashif
commit ddfb1b5ec7
1 changed files with 116 additions and 0 deletions
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116
drivers/spi/spi_cc13xx_cc26xx.c
View file

@ -9,11 +9,15 @@
LOG_MODULE_REGISTER(spi_cc13xx_cc26xx);
#include <drivers/spi.h>
#include <power/power.h>
#include <driverlib/prcm.h>
#include <driverlib/ssi.h>
#include <driverlib/ioc.h>
#include <ti/drivers/Power.h>
#include <ti/drivers/power/PowerCC26X2.h>
#include "spi_context.h"
struct spi_cc13xx_cc26xx_config {
@ -26,6 +30,9 @@ struct spi_cc13xx_cc26xx_config {
struct spi_cc13xx_cc26xx_data {
struct spi_context ctx;
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
u32_t pm_state;
#endif
};
static inline struct spi_cc13xx_cc26xx_data *get_dev_data(struct device *dev)
@ -137,6 +144,10 @@ static int spi_cc13xx_cc26xx_transceive(struct device *dev,
spi_context_lock(ctx, false, NULL);
#ifdef CONFIG_SYS_POWER_MANAGEMENT
sys_pm_ctrl_disable_state(SYS_POWER_STATE_SLEEP_2);
#endif
err = spi_cc13xx_cc26xx_configure(dev, config);
if (err) {
goto done;
@ -169,6 +180,9 @@ static int spi_cc13xx_cc26xx_transceive(struct device *dev,
spi_context_cs_control(ctx, false);
done:
#ifdef CONFIG_SYS_POWER_MANAGEMENT
sys_pm_ctrl_enable_state(SYS_POWER_STATE_SLEEP_2);
#endif
spi_context_release(ctx, err);
return err;
}
@ -191,6 +205,72 @@ static int spi_cc13xx_cc26xx_release(struct device *dev,
return 0;
}
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
static int spi_cc13xx_cc26xx_set_power_state(struct device *dev,
u32_t new_state)
{
int ret = 0;
if ((new_state == DEVICE_PM_ACTIVE_STATE) &&
(new_state != get_dev_data(dev)->pm_state)) {
if (get_dev_config(dev)->base ==
DT_TI_CC13XX_CC26XX_SPI_40000000_BASE_ADDRESS) {
Power_setDependency(PowerCC26XX_PERIPH_SSI0);
} else {
Power_setDependency(PowerCC26XX_PERIPH_SSI1);
}
get_dev_data(dev)->pm_state = new_state;
} else {
__ASSERT_NO_MSG(new_state == DEVICE_PM_LOW_POWER_STATE ||
new_state == DEVICE_PM_SUSPEND_STATE ||
new_state == DEVICE_PM_OFF_STATE);
if (get_dev_data(dev)->pm_state == DEVICE_PM_ACTIVE_STATE) {
SSIDisable(get_dev_config(dev)->base);
/*
* Release power dependency
*/
if (get_dev_config(dev)->base ==
DT_TI_CC13XX_CC26XX_SPI_40000000_BASE_ADDRESS) {
Power_releaseDependency(
PowerCC26XX_PERIPH_SSI0);
} else {
Power_releaseDependency(
PowerCC26XX_PERIPH_SSI1);
}
get_dev_data(dev)->pm_state = new_state;
}
}
return ret;
}
static int spi_cc13xx_cc26xx_pm_control(struct device *dev, u32_t ctrl_command,
void *context, device_pm_cb cb, void *arg)
{
int ret = 0;
if (ctrl_command == DEVICE_PM_SET_POWER_STATE) {
u32_t new_state = *((const u32_t *)context);
if (new_state != get_dev_data(dev)->pm_state) {
ret = spi_cc13xx_cc26xx_set_power_state(dev,
new_state);
}
} else {
__ASSERT_NO_MSG(ctrl_command == DEVICE_PM_GET_POWER_STATE);
*((u32_t *)context) = get_dev_data(dev)->pm_state;
}
if (cb) {
cb(dev, ret, context, arg);
}
return ret;
}
#endif /* CONFIG_DEVICE_POWER_MANAGEMENT */
#if defined(CONFIG_SPI_0) || defined(CONFIG_SPI_1)
static const struct spi_driver_api spi_cc13xx_cc26xx_driver_api = {
.transceive = spi_cc13xx_cc26xx_transceive,
@ -203,6 +283,14 @@ static const struct spi_driver_api spi_cc13xx_cc26xx_driver_api = {
#ifdef CONFIG_SPI_0
static int spi_cc13xx_cc26xx_init_0(struct device *dev)
{
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
get_dev_data(dev)->pm_state = DEVICE_PM_ACTIVE_STATE;
#endif
#ifdef CONFIG_SYS_POWER_MANAGEMENT
/* Set Power dependencies & constraints */
Power_setDependency(PowerCC26XX_PERIPH_SSI0);
#else
/* Enable SSI0 power domain */
PRCMPowerDomainOn(PRCM_DOMAIN_SERIAL);
@ -223,6 +311,7 @@ static int spi_cc13xx_cc26xx_init_0(struct device *dev)
PRCM_DOMAIN_POWER_ON) {
continue;
}
#endif
spi_context_unlock_unconditionally(&get_dev_data(dev)->ctx);
@ -246,15 +335,32 @@ static struct spi_cc13xx_cc26xx_data spi_cc13xx_cc26xx_data_0 = {
SPI_CONTEXT_INIT_SYNC(spi_cc13xx_cc26xx_data_0, ctx),
};
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
DEVICE_DEFINE(spi_cc13xx_cc26xx_0, DT_TI_CC13XX_CC26XX_SPI_40000000_LABEL,
spi_cc13xx_cc26xx_init_0,
spi_cc13xx_cc26xx_pm_control,
&spi_cc13xx_cc26xx_data_0, &spi_cc13xx_cc26xx_config_0,
POST_KERNEL, CONFIG_SPI_INIT_PRIORITY,
&spi_cc13xx_cc26xx_driver_api);
#else
DEVICE_AND_API_INIT(spi_cc13xx_cc26xx_0, DT_TI_CC13XX_CC26XX_SPI_40000000_LABEL,
spi_cc13xx_cc26xx_init_0, &spi_cc13xx_cc26xx_data_0,
&spi_cc13xx_cc26xx_config_0, POST_KERNEL,
CONFIG_SPI_INIT_PRIORITY, &spi_cc13xx_cc26xx_driver_api);
#endif
#endif /* CONFIG_SPI_0 */
#ifdef CONFIG_SPI_1
static int spi_cc13xx_cc26xx_init_1(struct device *dev)
{
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
get_dev_data(dev)->pm_state = DEVICE_PM_ACTIVE_STATE;
#endif
#ifdef CONFIG_SYS_POWER_MANAGEMENT
/* Set Power dependencies & constraints */
Power_setDependency(PowerCC26XX_PERIPH_SSI1);
#else
/* Enable SSI1 power domain */
PRCMPowerDomainOn(PRCM_DOMAIN_PERIPH);
@ -275,6 +381,7 @@ static int spi_cc13xx_cc26xx_init_1(struct device *dev)
PRCM_DOMAIN_POWER_ON) {
continue;
}
#endif
spi_context_unlock_unconditionally(&get_dev_data(dev)->ctx);
@ -298,8 +405,17 @@ static struct spi_cc13xx_cc26xx_data spi_cc13xx_cc26xx_data_1 = {
SPI_CONTEXT_INIT_SYNC(spi_cc13xx_cc26xx_data_1, ctx),
};
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
DEVICE_DEFINE(spi_cc13xx_cc26xx_1, DT_TI_CC13XX_CC26XX_SPI_40008000_LABEL,
spi_cc13xx_cc26xx_init_1,
spi_cc13xx_cc26xx_pm_control,
&spi_cc13xx_cc26xx_data_1, &spi_cc13xx_cc26xx_config_1,
POST_KERNEL, CONFIG_SPI_INIT_PRIORITY,
&spi_cc13xx_cc26xx_driver_api);
#else
DEVICE_AND_API_INIT(spi_cc13xx_cc26xx_1, DT_TI_CC13XX_CC26XX_SPI_40008000_LABEL,
spi_cc13xx_cc26xx_init_1, &spi_cc13xx_cc26xx_data_1,
&spi_cc13xx_cc26xx_config_1, POST_KERNEL,
CONFIG_SPI_INIT_PRIORITY, &spi_cc13xx_cc26xx_driver_api);
#endif
#endif /* CONFIG_SPI_1 */