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drivers: spi: pm: Add power management support for Ambiq Apollo3 SoCs SPI

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Add power management support for Apollo3/Apollo3P SPI, and
automatically enables device runtime power management

Signed-off-by: Zhengwei Wang <zwang@ambiq.com>
This commit is contained in:
Zhengwei Wang 2024-02-06 15:17:55 +08:00 committed by Henrik Brix Andersen
parent 2cbf3b9365
commit 4a7adb3d9d
3 changed files with 64 additions and 2 deletions
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54
drivers/spi/spi_ambiq.c
View file

@ -13,6 +13,10 @@ LOG_MODULE_REGISTER(spi_ambiq);
#include <zephyr/drivers/pinctrl.h>
#include <zephyr/kernel.h>
#include <zephyr/sys/byteorder.h>
#include <zephyr/pm/device.h>
#include <zephyr/pm/policy.h>
#include <zephyr/pm/device_runtime.h>
#include <stdlib.h>
#include <errno.h>
#include "spi_context.h"
@ -344,6 +348,12 @@ static int spi_ambiq_transceive(const struct device *dev, const struct spi_confi
return 0;
}
ret = pm_device_runtime_get(dev);
if (ret < 0) {
LOG_ERR("pm_device_runtime_get failed: %d", ret);
}
/* context setup */
spi_context_lock(&data->ctx, false, NULL, NULL, config);
@ -360,6 +370,15 @@ static int spi_ambiq_transceive(const struct device *dev, const struct spi_confi
spi_context_release(&data->ctx, ret);
/* Use async put to avoid useless device suspension/resumption
* when doing consecutive transmission.
*/
ret = pm_device_runtime_put_async(dev, K_MSEC(2));
if (ret < 0) {
LOG_ERR("pm_device_runtime_put failed: %d", ret);
}
return ret;
}
@ -421,6 +440,35 @@ end:
return ret;
}
#ifdef CONFIG_PM_DEVICE
static int spi_ambiq_pm_action(const struct device *dev, enum pm_device_action action)
{
struct spi_ambiq_data *data = dev->data;
uint32_t ret;
am_hal_sysctrl_power_state_e status;
switch (action) {
case PM_DEVICE_ACTION_RESUME:
status = AM_HAL_SYSCTRL_WAKE;
break;
case PM_DEVICE_ACTION_SUSPEND:
status = AM_HAL_SYSCTRL_DEEPSLEEP;
break;
default:
return -ENOTSUP;
}
ret = am_hal_iom_power_ctrl(data->iom_handler, status, true);
if (ret != AM_HAL_STATUS_SUCCESS) {
LOG_ERR("am_hal_iom_power_ctrl failed: %d", ret);
return -EPERM;
} else {
return 0;
}
}
#endif /* CONFIG_PM_DEVICE */
#define AMBIQ_SPI_INIT(n) \
PINCTRL_DT_INST_DEFINE(n); \
static int pwr_on_ambiq_spi_##n(void) \
@ -448,7 +496,9 @@ end:
.pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(n), \
.irq_config_func = spi_irq_config_func_##n, \
.pwr_func = pwr_on_ambiq_spi_##n}; \
DEVICE_DT_INST_DEFINE(n, spi_ambiq_init, NULL, &spi_ambiq_data##n, &spi_ambiq_config##n, \
POST_KERNEL, CONFIG_SPI_INIT_PRIORITY, &spi_ambiq_driver_api);
PM_DEVICE_DT_INST_DEFINE(n, spi_ambiq_pm_action); \
DEVICE_DT_INST_DEFINE(n, spi_ambiq_init, PM_DEVICE_DT_INST_GET(n), &spi_ambiq_data##n, \
&spi_ambiq_config##n, POST_KERNEL, CONFIG_SPI_INIT_PRIORITY, \
&spi_ambiq_driver_api);
DT_INST_FOREACH_STATUS_OKAY(AMBIQ_SPI_INIT)

6
dts/arm/ambiq/ambiq_apollo3_blue.dtsi
View file

@ -196,6 +196,7 @@
interrupts = <6 0>;
status = "disabled";
ambiq,pwrcfg = <&pwrcfg 0x8 0x2>;
zephyr,pm-device-runtime-auto;
};
spi1: spi@50005000 {
@ -205,6 +206,7 @@
interrupts = <7 0>;
status = "disabled";
ambiq,pwrcfg = <&pwrcfg 0x8 0x4>;
zephyr,pm-device-runtime-auto;
};
spi2: spi@50006000 {
@ -214,6 +216,7 @@
interrupts = <8 0>;
status = "disabled";
ambiq,pwrcfg = <&pwrcfg 0x8 0x8>;
zephyr,pm-device-runtime-auto;
};
spi3: spi@50007000 {
@ -223,6 +226,7 @@
interrupts = <9 0>;
status = "disabled";
ambiq,pwrcfg = <&pwrcfg 0x8 0x10>;
zephyr,pm-device-runtime-auto;
};
spi4: spi@50008000 {
@ -232,6 +236,7 @@
interrupts = <10 0>;
status = "disabled";
ambiq,pwrcfg = <&pwrcfg 0x8 0x20>;
zephyr,pm-device-runtime-auto;
};
spi5: spi@50009000 {
@ -241,6 +246,7 @@
interrupts = <11 0>;
status = "disabled";
ambiq,pwrcfg = <&pwrcfg 0x8 0x40>;
zephyr,pm-device-runtime-auto;
};
i2c0: i2c@50004000 {

6
dts/arm/ambiq/ambiq_apollo3p_blue.dtsi
View file

@ -214,6 +214,7 @@
interrupts = <6 0>;
status = "disabled";
ambiq,pwrcfg = <&pwrcfg 0x8 0x2>;
zephyr,pm-device-runtime-auto;
};
spi1: spi@50005000 {
@ -223,6 +224,7 @@
interrupts = <7 0>;
status = "disabled";
ambiq,pwrcfg = <&pwrcfg 0x8 0x4>;
zephyr,pm-device-runtime-auto;
};
spi2: spi@50006000 {
@ -232,6 +234,7 @@
interrupts = <8 0>;
status = "disabled";
ambiq,pwrcfg = <&pwrcfg 0x8 0x8>;
zephyr,pm-device-runtime-auto;
};
spi3: spi@50007000 {
@ -241,6 +244,7 @@
interrupts = <9 0>;
status = "disabled";
ambiq,pwrcfg = <&pwrcfg 0x8 0x10>;
zephyr,pm-device-runtime-auto;
};
spi4: spi@50008000 {
@ -250,6 +254,7 @@
interrupts = <10 0>;
status = "disabled";
ambiq,pwrcfg = <&pwrcfg 0x8 0x20>;
zephyr,pm-device-runtime-auto;
};
spi5: spi@50009000 {
@ -259,6 +264,7 @@
interrupts = <11 0>;
status = "disabled";
ambiq,pwrcfg = <&pwrcfg 0x8 0x40>;
zephyr,pm-device-runtime-auto;
};
i2c0: i2c@50004000 {