lib: acpi: Enable poweroff feature (5bdd670e) · Commits · Wenxi XU / zephyr

include/zephyr/acpi/acpi.h

+16 −1

Original line number	Diff line number	Diff line
		@@ -299,4 +299,19 @@ ACPI_MADT_LOCAL_APIC *acpi_local_apic_get(int cpu_num);
		*/
		int acpi_invoke_method(char path, ACPI_OBJECT_LIST arg_list, ACPI_OBJECT *ret_obj);

		#endif
		#if defined(CONFIG_ACPI_POWEROFF) \|\| defined(__DOXYGEN__)
		/**
		* @brief system level poweroff by setting it to soft off.
		* Requires @kconfig{CONFIG_ACPI_POWEROFF} to be enabled.
		*
		* @return -EINVAL if the pm1_cnt address is not available.
		*/
		int acpi_poweroff(void);
		#else
		static inline int acpi_poweroff(void)
		{
		return -ENOTSUP;
		}
		#endif /* CONFIG_ACPI_POWEROFF */

		#endif /* ZEPHYR_INCLUDE_DRIVERS_ACPI_H_ */

+5 −0

Original line number	Diff line number	Diff line
		@@ -34,6 +34,11 @@ config ACPI_SHELL
		help
		Enable commands for debugging ACPI using the built-in shell.

		config ACPI_POWEROFF
		bool "Power off functionality by setting system to S5 power state"
		help
		Enable support for system power off through ACPI.

		config ACPI_DEV_MAX
		int "maximum child devices"
		default 1000

+48 −0

Original line number	Diff line number	Diff line
		@@ -14,6 +14,23 @@
		#include <zephyr/logging/log.h>
		LOG_MODULE_REGISTER(ACPI, CONFIG_ACPI_LOG_LEVEL);

		#if defined(CONFIG_ACPI_POWEROFF)

		/* PM1_CNT register */
		#if (defined(CONFIG_BOARD_QEMU_X86_64) \|\| defined(CONFIG_BOARD_QEMU_X86))
		#define PM1_CNT_SLP_TYP_S5 0x00 /* S5 SLP_TYP is 0 in QEMU */
		#elif defined(CONFIG_ACRN_COMMON)
		#define PM1_CNT_SLP_TYP_S5 0x05 /* S5 SLP_TYP is 5 in ACRN */
		#else
		#define PM1_CNT_SLP_TYP_S5 0x07 /* S5 SLP_TYP is 7 in other platforms*/
		#endif

		#define PM1_CNT_SLP_TYP_SHFT 0x0A /* SLP_TYP bits(10-12) in PM1_CNT */

		#define PM1_CNT_SLP_EN BIT(13) /* Sets SLP_EN bit13 */

		#endif /* CONFIG_ACPI_POWEROFF */

		static struct {
		struct acpi_dev child_dev[CONFIG_ACPI_DEV_MAX];
		int num_dev;
		@@ -974,3 +991,34 @@ static int acpi_init(void)
		exit:
		return status;
		}

		#if defined(CONFIG_ACPI_POWEROFF)

		int acpi_poweroff(void)
		{
		ACPI_STATUS status;
		uintptr_t pm1_cnt_addr;
		uint32_t pm1_cnt;

		if (!acpi.early_init) {
		status = acpi_early_init();
		if (status) {
		LOG_ERR("ACPI early init failed");
		return -ENODEV;
		}
		}

		if (!AcpiGbl_FADT.Pm1aControlBlock) {
		return -EINVAL;
		}

		pm1_cnt_addr = AcpiGbl_FADT.Pm1aControlBlock;

		pm1_cnt = sys_in16(pm1_cnt_addr);
		pm1_cnt \|= ((PM1_CNT_SLP_TYP_S5 << PM1_CNT_SLP_TYP_SHFT) \| PM1_CNT_SLP_EN);
		sys_out16(pm1_cnt, pm1_cnt_addr);

		return 0;
		}

		#endif /* CONFIG_ACPI_POWEROFF */

+13 −0

Original line number	Diff line number	Diff line
		@@ -346,6 +346,16 @@ static int read_table(const struct shell sh, size_t argc, char *argv)
		return 0;
		}

		#if defined(CONFIG_ACPI_POWEROFF)

		static void cmd_acpi_poweroff(const struct shell *sh)
		{
		if (acpi_poweroff()) {
		shell_print(sh, "ACPI poweroff failed due to invalid PM1_CNT address");
		}
		}
		#endif

		SHELL_STATIC_SUBCMD_SET_CREATE(
		sub_acpi,
		SHELL_CMD(crs, NULL,
		@@ -366,6 +376,9 @@ SHELL_STATIC_SUBCMD_SET_CREATE(
		get_acpi_dev_resource),
		SHELL_CMD(rd_table, NULL, "read ACPI table (eg: acpi read_table APIC)",
		read_table),
		#if defined(CONFIG_ACPI_POWEROFF)
		SHELL_CMD(poweroff, NULL, "poweroff the platform", cmd_acpi_poweroff),
		#endif
		SHELL_SUBCMD_SET_END /* Array terminated. */
		);