[PATCH v2 5/7] sysreset: Support reset via Renesas RAA215300 PMIC
Paul Barker
paul.barker.ct at bp.renesas.com
Mon Feb 26 16:05:34 CET 2024
This patch adds support for resetting a board via the RAA215300 PMIC.
Note that the RAA215300 documentation names the available reset types
differently to u-boot:
* A "warm" reset via the RAA215300 PMIC will fully reset the SoC
(CPU & GPIOs), so this corresponds to SYSRESET_COLD.
* A "cold" reset via the RAA215300 PMIC will cycle all power supply
rails, so this corresponds to SYSRESET_POWER.
Signed-off-by: Paul Barker <paul.barker.ct at bp.renesas.com>
---
drivers/sysreset/Kconfig | 6 +++
drivers/sysreset/Makefile | 1 +
drivers/sysreset/sysreset_raa215300.c | 58 +++++++++++++++++++++++++++
3 files changed, 65 insertions(+)
create mode 100644 drivers/sysreset/sysreset_raa215300.c
diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig
index 0e52f996283c..49c0787b26d8 100644
--- a/drivers/sysreset/Kconfig
+++ b/drivers/sysreset/Kconfig
@@ -229,6 +229,12 @@ config SYSRESET_MPC83XX
help
Reboot support for NXP MPC83xx SoCs.
+config SYSRESET_RAA215300
+ bool "Support sysreset via Renesas RAA215300 PMIC"
+ depends on PMIC_RAA215300
+ help
+ Add support for the system reboot via the Renesas RAA215300 PMIC.
+
endif
endmenu
diff --git a/drivers/sysreset/Makefile b/drivers/sysreset/Makefile
index c9f1c625aebb..e0e732205df3 100644
--- a/drivers/sysreset/Makefile
+++ b/drivers/sysreset/Makefile
@@ -27,4 +27,5 @@ obj-$(CONFIG_SYSRESET_WATCHDOG) += sysreset_watchdog.o
obj-$(CONFIG_SYSRESET_RESETCTL) += sysreset_resetctl.o
obj-$(CONFIG_$(SPL_TPL_)SYSRESET_AT91) += sysreset_at91.o
obj-$(CONFIG_$(SPL_TPL_)SYSRESET_X86) += sysreset_x86.o
+obj-$(CONFIG_SYSRESET_RAA215300) += sysreset_raa215300.o
obj-$(CONFIG_TARGET_XTFPGA) += sysreset_xtfpga.o
diff --git a/drivers/sysreset/sysreset_raa215300.c b/drivers/sysreset/sysreset_raa215300.c
new file mode 100644
index 000000000000..32dfcb0aec84
--- /dev/null
+++ b/drivers/sysreset/sysreset_raa215300.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Renesas Electronics Corporation
+ */
+
+#include <dm.h>
+#include <power/pmic.h>
+#include <sysreset.h>
+
+#define RAA215300_REG_SWRESET 0x6D
+#define RAA215300_COLD_RESET BIT(0)
+#define RAA215300_WARM_RESET BIT(1)
+
+static int raa215300_sysreset_request(struct udevice *dev, enum sysreset_t type)
+{
+ struct udevice *pmic = dev_get_parent(dev);
+ int ret;
+ u8 val;
+
+ /*
+ * The RAA215300 documentation names the available reset types
+ * differently to u-boot:
+ *
+ * - A "warm" reset via the RAA215300 PMIC will fully reset the SoC
+ * (CPU & GPIOs), so this corresponds to SYSRESET_COLD.
+ *
+ * - A "cold" reset via the RAA215300 PMIC will cycle all power supply
+ * rails, so this corresponds to SYSRESET_POWER.
+ */
+ switch (type) {
+ case SYSRESET_COLD:
+ val = RAA215300_WARM_RESET;
+ break;
+
+ case SYSRESET_POWER:
+ val = RAA215300_COLD_RESET;
+ break;
+
+ default:
+ return -EPROTONOSUPPORT;
+ }
+
+ ret = pmic_reg_write(pmic, RAA215300_REG_SWRESET, val);
+ if (ret)
+ return ret;
+
+ return -EINPROGRESS;
+}
+
+static struct sysreset_ops raa215300_sysreset_ops = {
+ .request = raa215300_sysreset_request,
+};
+
+U_BOOT_DRIVER(raa215300_sysreset) = {
+ .name = "raa215300_sysreset",
+ .id = UCLASS_SYSRESET,
+ .ops = &raa215300_sysreset_ops,
+};
--
2.43.2
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