soc: infineon: Support for power management on 20829

	- Initial changes in board, dts, and soc files to support
	system power management

Signed-off-by: Sreeram Tatapudi <[email protected]>

boards/infineon/cyw920829m2evk_02/cyw920829m2evk_02.dts

@@ -81,6 +81,10 @@ uart2: &scb2 {
 	status = "okay";
 };
 
+&mcwdt0 {
+	status = "okay";
+};
+
 &bluetooth {
 	status = "okay";
 };

boards/infineon/cyw920829m2evk_02/cyw920829m2evk_02_defconfig

@@ -4,7 +4,6 @@
 #
 
 # General configuration
-CONFIG_CORTEX_M_SYSTICK=y
 CONFIG_BUILD_OUTPUT_HEX=y
 CONFIG_BUILD_OUTPUT_BIN=y
 

dts/arm/infineon/cat1b/cyw20829/cyw20829.dtsi

@@ -16,6 +16,21 @@
 			device_type = "cpu";
 			compatible = "arm,cortex-m33";
 			reg = <0>;
+			cpu-power-states = <&idle &suspend_to_ram>;
+		};
+	};
+
+	power-states {
+		idle: idle {
+			compatible = "zephyr,power-state";
+			power-state-name = "suspend-to-idle";
+			min-residency-us = <1000000>;
+		};
+
+		suspend_to_ram: suspend_to_ram {
+			compatible = "zephyr,power-state";
+			power-state-name = "suspend-to-ram";
+			min-residency-us = <2000000>;
 		};
 	};
 

modules/hal_infineon/mtb-pdl-cat1/CMakeLists.txt

@@ -84,6 +84,8 @@ if(CONFIG_SOC_FAMILY_INFINEON_CAT1B)
   zephyr_library_sources(${pdl_drv_dir}/source/cy_systick_v2.c)
   zephyr_library_sources(${pdl_drv_dir}/source/cy_syspm_v2.c)
   zephyr_library_sources(${pdl_drv_dir}/source/cy_syspm_btss.c)
+  zephyr_library_sources(${pdl_drv_dir}/source/cy_syspm_ppu.c)
+  zephyr_library_sources(${pdl_drv_dir}/source/ppu_v1.c)
 endif()
 zephyr_library_sources(${pdl_drv_dir}/source/cy_syslib.c)
 zephyr_library_sources(${pdl_drv_dir}/source/cy_syspm.c)

soc/infineon/cat1b/cyw20829/CMakeLists.txt

@@ -5,6 +5,8 @@ zephyr_sources(soc.c)
 zephyr_sources(app_header.c)
 zephyr_include_directories(.)
 
+zephyr_sources_ifdef(CONFIG_PM ./power.c)
+
 # CAT1B family defines
 zephyr_compile_definitions_ifdef(CONFIG_SOC_FAMILY_INFINEON_CAT1 CY_USING_HAL)
 zephyr_compile_definitions_ifdef(CONFIG_SOC_FAMILY_INFINEON_CAT1B COMPONENT_CAT1B)

soc/infineon/cat1b/cyw20829/Kconfig

@@ -12,3 +12,4 @@ config SOC_SERIES_CYW20829
 	select CPU_HAS_FPU
 	select DYNAMIC_INTERRUPTS
 	select HAS_SEGGER_RTT if ZEPHYR_SEGGER_MODULE
+	select HAS_PM

soc/infineon/cat1b/cyw20829/Kconfig.defconfig

@@ -6,6 +6,13 @@
 
 if SOC_DIE_CYW20829
 
+config INFINEON_CAT1_LP_TIMER
+	bool
+	default n
+
+config CORTEX_M_SYSTICK
+	default n if INFINEON_CAT1_LP_TIMER
+
 config NUM_IRQS
 	default 70
 

soc/infineon/cat1b/cyw20829/power.c

@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2021 Cypress Semiconductor Corporation (an Infineon company) or
+ * an affiliate of Cypress Semiconductor Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+#include <zephyr/device.h>
+#include <zephyr/pm/pm.h>
+#include <zephyr/logging/log.h>
+
+#include <cyhal_syspm.h>
+#include <cyhal_lptimer.h>
+
+LOG_MODULE_REGISTER(soc_power, CONFIG_SOC_LOG_LEVEL);
+
+static uint32_t sleep_attempt_counts;
+static uint32_t sleep_counts;
+static uint32_t deepsleep_attempt_counts;
+static uint32_t deepsleep_counts;
+static int64_t last_sleep_start;
+static int64_t last_sleep_duration;
+
+void get_sleep_info(uint32_t *sleepattempts, uint32_t *sleepcounts, uint32_t *deepsleepattempts,
+		    uint32_t *deepsleepcounts, int64_t *sleeptime)
+{
+	*sleepattempts = sleep_attempt_counts;
+	*sleepcounts = sleep_counts;
+	*deepsleepattempts = deepsleep_attempt_counts;
+	*deepsleepcounts = deepsleep_counts;
+	*sleeptime = last_sleep_duration;
+}
+
+/*
+ * Called from pm_system_suspend(int32_t ticks) in subsys/power.c
+ * For deep sleep pm_system_suspend has executed all the driver
+ * power management call backs.
+ */
+__weak void pm_state_set(enum pm_state state, uint8_t substate_id)
+{
+	ARG_UNUSED(substate_id);
+
+	/* Set BASEPRI to 0 */
+	irq_unlock(0);
+
+	switch (state) {
+	case PM_STATE_SUSPEND_TO_IDLE:
+		LOG_DBG("Entering PM state suspend to idle");
+		sleep_attempt_counts++;
+		last_sleep_start = k_uptime_ticks();
+		if (cyhal_syspm_sleep() == CY_RSLT_SUCCESS) {
+			sleep_counts++;
+		}
+
+		break;
+	case PM_STATE_SUSPEND_TO_RAM:
+		LOG_DBG("Entering PM state suspend to RAM");
+		deepsleep_attempt_counts++;
+		last_sleep_start = k_uptime_ticks();
+		if (cyhal_syspm_deepsleep() == CY_RSLT_SUCCESS) {
+			deepsleep_counts++;
+		}
+
+		/*
+		 * The HAL function doesn't clear this bit.  It is a problem
+		 * if the Zephyr idle function executes the wfi instruction
+		 * with this bit set.  We will always clear it here to avoid
+		 * that situation.
+		 */
+		SCB_SCR &= (uint32_t)~SCB_SCR_SLEEPDEEP_Msk;
+		break;
+	default:
+		LOG_DBG("Unsupported power state %u", state);
+		break;
+	}
+}
+
+__weak void pm_state_exit_post_ops(enum pm_state state, uint8_t substate_id)
+{
+	ARG_UNUSED(substate_id);
+
+	switch (state) {
+	case PM_STATE_SUSPEND_TO_IDLE:
+	case PM_STATE_SUSPEND_TO_RAM:
+		last_sleep_duration = last_sleep_start - k_uptime_ticks();
+		break;
+
+	default:
+		break;
+	}
+}
+
+static int ifx_pm_init(void)
+{
+#if defined(CONFIG_BOARD_CYW920829M2EVK_02)
+
+	/* System Domain Idle Power Mode Configuration */
+	Cy_SysPm_SetDeepSleepMode(CY_SYSPM_MODE_DEEPSLEEP);
+
+#endif
+
+	return cyhal_syspm_init();
+}
+
+SYS_INIT(ifx_pm_init, PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);

soc/infineon/cat1b/cyw20829/power.h

@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2021 Cypress Semiconductor Corporation (an Infineon company) or
+ * an affiliate of Cypress Semiconductor Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef __IFX_POWER_H
+#define __IFX_POWER_H
+
+void get_sleep_info(uint32_t *sleepattempts, uint32_t *sleepcounts, uint32_t *deepsleepattempts,
+		    uint32_t *deepsleepcounts, int64_t *sleeptime);
+
+#endif