sysreset: implement TPS65910 sysreset functions

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 <clamor95@gmail.com>

diff --git a/drivers/power/pmic/pmic_tps65910_dm.c b/drivers/power/pmic/pmic_tps65910_dm.c
index 0a4911cef61dc5fe30912e597af9ab6d77a86a0a..ecf836eb0e659002ad64f5f0696ed6f69758eda7 100644 (file)
--- 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 cdb4ae2bb11ab36405ccbce0481e5304a57a03e4..659170d156887f43c9d63c501383f1509de72aa6 100644 (file)
--- 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 f62db899da7076b46daf37842034d12a5d2657d9..0d96a204a95a13c83cde0d1c81ae6a8af739ac12 100644 (file)
--- 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 (file)
index 0000000..98da566
--- /dev/null
+++ b/drivers/sysreset/sysreset_tps65910.c
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  Copyright(C) 2023 Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#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 7d6545abdf0990e89e6ce7bc752c685944bd9b67..2026ec2f42648aa890348909be24124646872695 100644 (file)
--- 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 {