drivers: spi: cc13xx_cc26xx: add power management support
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>
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41cc9b2c2a
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ddfb1b5ec7
1 changed files with 116 additions and 0 deletions
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@ -9,11 +9,15 @@
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LOG_MODULE_REGISTER(spi_cc13xx_cc26xx);
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#include <drivers/spi.h>
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#include <power/power.h>
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#include <driverlib/prcm.h>
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#include <driverlib/ssi.h>
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#include <driverlib/ioc.h>
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#include <ti/drivers/Power.h>
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#include <ti/drivers/power/PowerCC26X2.h>
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#include "spi_context.h"
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struct spi_cc13xx_cc26xx_config {
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@ -26,6 +30,9 @@ struct spi_cc13xx_cc26xx_config {
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struct spi_cc13xx_cc26xx_data {
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struct spi_context ctx;
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#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
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u32_t pm_state;
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#endif
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};
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static inline struct spi_cc13xx_cc26xx_data *get_dev_data(struct device *dev)
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@ -137,6 +144,10 @@ static int spi_cc13xx_cc26xx_transceive(struct device *dev,
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spi_context_lock(ctx, false, NULL);
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#ifdef CONFIG_SYS_POWER_MANAGEMENT
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sys_pm_ctrl_disable_state(SYS_POWER_STATE_SLEEP_2);
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#endif
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err = spi_cc13xx_cc26xx_configure(dev, config);
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if (err) {
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goto done;
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@ -169,6 +180,9 @@ static int spi_cc13xx_cc26xx_transceive(struct device *dev,
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spi_context_cs_control(ctx, false);
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done:
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#ifdef CONFIG_SYS_POWER_MANAGEMENT
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sys_pm_ctrl_enable_state(SYS_POWER_STATE_SLEEP_2);
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#endif
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spi_context_release(ctx, err);
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return err;
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}
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@ -191,6 +205,72 @@ static int spi_cc13xx_cc26xx_release(struct device *dev,
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return 0;
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}
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#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
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static int spi_cc13xx_cc26xx_set_power_state(struct device *dev,
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u32_t new_state)
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{
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int ret = 0;
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if ((new_state == DEVICE_PM_ACTIVE_STATE) &&
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(new_state != get_dev_data(dev)->pm_state)) {
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if (get_dev_config(dev)->base ==
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DT_TI_CC13XX_CC26XX_SPI_40000000_BASE_ADDRESS) {
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Power_setDependency(PowerCC26XX_PERIPH_SSI0);
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} else {
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Power_setDependency(PowerCC26XX_PERIPH_SSI1);
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}
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get_dev_data(dev)->pm_state = new_state;
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} else {
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__ASSERT_NO_MSG(new_state == DEVICE_PM_LOW_POWER_STATE ||
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new_state == DEVICE_PM_SUSPEND_STATE ||
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new_state == DEVICE_PM_OFF_STATE);
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if (get_dev_data(dev)->pm_state == DEVICE_PM_ACTIVE_STATE) {
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SSIDisable(get_dev_config(dev)->base);
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/*
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* Release power dependency
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*/
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if (get_dev_config(dev)->base ==
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DT_TI_CC13XX_CC26XX_SPI_40000000_BASE_ADDRESS) {
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Power_releaseDependency(
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PowerCC26XX_PERIPH_SSI0);
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} else {
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Power_releaseDependency(
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PowerCC26XX_PERIPH_SSI1);
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}
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get_dev_data(dev)->pm_state = new_state;
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}
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}
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return ret;
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}
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static int spi_cc13xx_cc26xx_pm_control(struct device *dev, u32_t ctrl_command,
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void *context, device_pm_cb cb, void *arg)
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{
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int ret = 0;
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if (ctrl_command == DEVICE_PM_SET_POWER_STATE) {
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u32_t new_state = *((const u32_t *)context);
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if (new_state != get_dev_data(dev)->pm_state) {
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ret = spi_cc13xx_cc26xx_set_power_state(dev,
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new_state);
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}
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} else {
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__ASSERT_NO_MSG(ctrl_command == DEVICE_PM_GET_POWER_STATE);
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*((u32_t *)context) = get_dev_data(dev)->pm_state;
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}
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if (cb) {
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cb(dev, ret, context, arg);
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}
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return ret;
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}
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#endif /* CONFIG_DEVICE_POWER_MANAGEMENT */
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#if defined(CONFIG_SPI_0) || defined(CONFIG_SPI_1)
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static const struct spi_driver_api spi_cc13xx_cc26xx_driver_api = {
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.transceive = spi_cc13xx_cc26xx_transceive,
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@ -203,6 +283,14 @@ static const struct spi_driver_api spi_cc13xx_cc26xx_driver_api = {
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#ifdef CONFIG_SPI_0
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static int spi_cc13xx_cc26xx_init_0(struct device *dev)
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{
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#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
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get_dev_data(dev)->pm_state = DEVICE_PM_ACTIVE_STATE;
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#endif
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#ifdef CONFIG_SYS_POWER_MANAGEMENT
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/* Set Power dependencies & constraints */
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Power_setDependency(PowerCC26XX_PERIPH_SSI0);
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#else
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/* Enable SSI0 power domain */
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PRCMPowerDomainOn(PRCM_DOMAIN_SERIAL);
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@ -223,6 +311,7 @@ static int spi_cc13xx_cc26xx_init_0(struct device *dev)
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PRCM_DOMAIN_POWER_ON) {
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continue;
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}
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#endif
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spi_context_unlock_unconditionally(&get_dev_data(dev)->ctx);
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@ -246,15 +335,32 @@ static struct spi_cc13xx_cc26xx_data spi_cc13xx_cc26xx_data_0 = {
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SPI_CONTEXT_INIT_SYNC(spi_cc13xx_cc26xx_data_0, ctx),
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};
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#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
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DEVICE_DEFINE(spi_cc13xx_cc26xx_0, DT_TI_CC13XX_CC26XX_SPI_40000000_LABEL,
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spi_cc13xx_cc26xx_init_0,
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spi_cc13xx_cc26xx_pm_control,
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&spi_cc13xx_cc26xx_data_0, &spi_cc13xx_cc26xx_config_0,
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POST_KERNEL, CONFIG_SPI_INIT_PRIORITY,
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&spi_cc13xx_cc26xx_driver_api);
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#else
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DEVICE_AND_API_INIT(spi_cc13xx_cc26xx_0, DT_TI_CC13XX_CC26XX_SPI_40000000_LABEL,
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spi_cc13xx_cc26xx_init_0, &spi_cc13xx_cc26xx_data_0,
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&spi_cc13xx_cc26xx_config_0, POST_KERNEL,
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CONFIG_SPI_INIT_PRIORITY, &spi_cc13xx_cc26xx_driver_api);
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#endif
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#endif /* CONFIG_SPI_0 */
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#ifdef CONFIG_SPI_1
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static int spi_cc13xx_cc26xx_init_1(struct device *dev)
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{
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#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
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get_dev_data(dev)->pm_state = DEVICE_PM_ACTIVE_STATE;
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#endif
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#ifdef CONFIG_SYS_POWER_MANAGEMENT
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/* Set Power dependencies & constraints */
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Power_setDependency(PowerCC26XX_PERIPH_SSI1);
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#else
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/* Enable SSI1 power domain */
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PRCMPowerDomainOn(PRCM_DOMAIN_PERIPH);
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@ -275,6 +381,7 @@ static int spi_cc13xx_cc26xx_init_1(struct device *dev)
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PRCM_DOMAIN_POWER_ON) {
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continue;
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}
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#endif
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spi_context_unlock_unconditionally(&get_dev_data(dev)->ctx);
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@ -298,8 +405,17 @@ static struct spi_cc13xx_cc26xx_data spi_cc13xx_cc26xx_data_1 = {
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SPI_CONTEXT_INIT_SYNC(spi_cc13xx_cc26xx_data_1, ctx),
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};
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#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
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DEVICE_DEFINE(spi_cc13xx_cc26xx_1, DT_TI_CC13XX_CC26XX_SPI_40008000_LABEL,
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spi_cc13xx_cc26xx_init_1,
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spi_cc13xx_cc26xx_pm_control,
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&spi_cc13xx_cc26xx_data_1, &spi_cc13xx_cc26xx_config_1,
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POST_KERNEL, CONFIG_SPI_INIT_PRIORITY,
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&spi_cc13xx_cc26xx_driver_api);
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#else
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DEVICE_AND_API_INIT(spi_cc13xx_cc26xx_1, DT_TI_CC13XX_CC26XX_SPI_40008000_LABEL,
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spi_cc13xx_cc26xx_init_1, &spi_cc13xx_cc26xx_data_1,
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&spi_cc13xx_cc26xx_config_1, POST_KERNEL,
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CONFIG_SPI_INIT_PRIORITY, &spi_cc13xx_cc26xx_driver_api);
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#endif
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#endif /* CONFIG_SPI_1 */
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