TPS65910/TPS65911 PMICs have embedded power control functions
used by some device to initiane device power off. Implement it as
sysreset driver.
Signed-off-by: Svyatoslav Ryhel <clamo...@gmail.com>
---
drivers/power/pmic/pmic_tps65910_dm.c | 12 +++++-
drivers/sysreset/Kconfig | 8 ++++
drivers/sysreset/Makefile | 1 +
drivers/sysreset/sysreset_tps65910.c | 55 +++++++++++++++++++++++++++
include/power/tps65910_pmic.h | 7 ++++
5 files changed, 82 insertions(+), 1 deletion(-)
create mode 100644 drivers/sysreset/sysreset_tps65910.c
diff --git a/drivers/power/pmic/pmic_tps65910_dm.c
b/drivers/power/pmic/pmic_tps65910_dm.c
index 0a4911cef6..ecf836eb0e 100644
--- a/drivers/power/pmic/pmic_tps65910_dm.c
+++ b/drivers/power/pmic/pmic_tps65910_dm.c
@@ -5,6 +5,7 @@
#include <common.h>
#include <dm.h>
+#include <dm/lists.h>
#include <i2c.h>
#include <log.h>
#include <linux/printk.h>
@@ -59,7 +60,16 @@ static int pmic_tps65910_bind(struct udevice *dev)
const struct pmic_child_info *tps6591x_children_info =
(struct pmic_child_info *)dev_get_driver_data(dev);
ofnode regulators_node;
- int children;
+ int children, ret;
+
+ if (IS_ENABLED(CONFIG_SYSRESET_TPS65910)) {
+ ret = device_bind_driver(dev, TPS65910_RST_DRIVER,
+ "sysreset", NULL);
+ if (ret) {
+ log_err("cannot bind SYSRESET (ret = %d)\n", ret);
+ return ret;
+ }
+ }
regulators_node = dev_read_subnode(dev, "regulators");
if (!ofnode_valid(regulators_node)) {
diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig
index cdb4ae2bb1..659170d156 100644
--- a/drivers/sysreset/Kconfig
+++ b/drivers/sysreset/Kconfig
@@ -157,6 +157,14 @@ config SYSRESET_TI_SCI
This enables the system reset driver support over TI System Control
Interface available on some new TI's SoCs.
+config SYSRESET_TPS65910
+ bool "Enable support for TPS65910/TPS65911 PMIC System Reset"
+ depends on DM_PMIC_TPS65910
+ select SYSRESET_CMD_POWEROFF if CMD_POWEROFF
+ help
+ Enable system power management functions found in TPS65910/TPS65911
+ PMICs.
+
config SYSRESET_TPS80031
bool "Enable support for TPS80031/TPS80032 PMIC System Reset"
depends on DM_PMIC_TPS80031
diff --git a/drivers/sysreset/Makefile b/drivers/sysreset/Makefile
index f62db899da..0d96a204a9 100644
--- a/drivers/sysreset/Makefile
+++ b/drivers/sysreset/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_SYSRESET_SOCFPGA) += sysreset_socfpga.o
obj-$(CONFIG_SYSRESET_SOCFPGA_SOC64) += sysreset_socfpga_soc64.o
obj-$(CONFIG_SYSRESET_TEGRA) += sysreset_tegra.o
obj-$(CONFIG_SYSRESET_TI_SCI) += sysreset-ti-sci.o
+obj-$(CONFIG_$(SPL_TPL_)SYSRESET_TPS65910) += sysreset_tps65910.o
obj-$(CONFIG_$(SPL_TPL_)SYSRESET_TPS80031) += sysreset_tps80031.o
obj-$(CONFIG_SYSRESET_SYSCON) += sysreset_syscon.o
obj-$(CONFIG_SYSRESET_WATCHDOG) += sysreset_watchdog.o
diff --git a/drivers/sysreset/sysreset_tps65910.c
b/drivers/sysreset/sysreset_tps65910.c
new file mode 100644
index 0000000000..1a362dea0d
--- /dev/null
+++ b/drivers/sysreset/sysreset_tps65910.c
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright(C) 2023 Svyatoslav Ryhel <clamo...@gmail.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <i2c.h>
+#include <errno.h>
+#include <sysreset.h>
+#include <power/pmic.h>
+#include <power/tps65910_pmic.h>
+
+static int tps65910_sysreset_request(struct udevice *dev,
+ enum sysreset_t type)
+{
+ int val;
+
+ val = pmic_reg_read(dev->parent, TPS65910_REG_DEVICE_CTRL);
+ if (val < 0)
+ return val;
+
+ /* define power-off to be sequential */
+ val |= PWR_OFF_SEQ;
+ pmic_reg_write(dev->parent, TPS65910_REG_DEVICE_CTRL, val);
+
+ val &= ~DEV_ON;
+
+ switch (type) {
+ case SYSRESET_POWER:
+ /* TPS65910: DEV_OFF_RST > DEVICE_CTRL */
+ pmic_reg_write(dev->parent, TPS65910_REG_DEVICE_CTRL,
+ val | DEV_OFF_RST);
+ break;
+ case SYSRESET_POWER_OFF:
+ /* TPS65910: DEV_OFF > DEVICE_CTRL */
+ pmic_reg_write(dev->parent, TPS65910_REG_DEVICE_CTRL,
+ val | DEV_OFF);
+ break;
+ default:
+ return -EPROTONOSUPPORT;
+ }
+
+ return -EINPROGRESS;
+}
+
+static struct sysreset_ops tps65910_sysreset = {
+ .request = tps65910_sysreset_request,
+};
+
+U_BOOT_DRIVER(sysreset_tps65910) = {
+ .id = UCLASS_SYSRESET,
+ .name = TPS65910_RST_DRIVER,
+ .ops = &tps65910_sysreset,
+};
diff --git a/include/power/tps65910_pmic.h b/include/power/tps65910_pmic.h
index 7d6545abdf..2026ec2f42 100644
--- a/include/power/tps65910_pmic.h
+++ b/include/power/tps65910_pmic.h
@@ -17,6 +17,12 @@
#define TPS65910_SUPPLY_STATE_OFF 0x0
#define TPS65910_SUPPLY_STATE_ON 0x1
+/* TPS65910 DEVICE_CTRL bits */
+#define PWR_OFF_SEQ BIT(7)
+#define DEV_OFF_RST BIT(3)
+#define DEV_ON BIT(2)
+#define DEV_OFF BIT(0)
+
/* i2c registers */
enum {
TPS65910_REG_RTC_SEC = 0x00,
@@ -125,6 +131,7 @@ struct tps65910_regulator_pdata {
#define TPS65910_BUCK_DRIVER "tps65910_buck"
#define TPS65910_BOOST_DRIVER "tps65910_boost"
#define TPS65910_LDO_DRIVER "tps65910_ldo"
+#define TPS65910_RST_DRIVER "tps65910_rst"
/* tps65911 i2c registers */
enum {
--
2.39.2
