sysreset: implement TPS80031 sysreset functions

TPS80031/TPS80032 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/tps80031.c b/drivers/power/pmic/tps80031.c
index 6b36ebbf7db4ef188f190839acd65c05cfabd7e3..a2f935b0c6dc05bd4dd8166c673b00d3f76f7045 100644 (file)
--- a/drivers/power/pmic/tps80031.c
+++ b/drivers/power/pmic/tps80031.c
@@ -44,7 +44,16 @@ static int tps80031_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
 static int tps80031_bind(struct udevice *dev)
 {
        ofnode regulators_node;
-       int children;
+       int children, ret;
+
+       if (IS_ENABLED(CONFIG_SYSRESET_TPS80031)) {
+               ret = device_bind_driver(dev, TPS80031_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 bc358961012f0a6d5260a5de39d65540cab3f6b8..cdb4ae2bb11ab36405ccbce0481e5304a57a03e4 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_TPS80031
+       bool "Enable support for TPS80031/TPS80032 PMIC System Reset"
+       depends on DM_PMIC_TPS80031
+       select SYSRESET_CMD_POWEROFF if CMD_POWEROFF
+       help
+         Enable system power management functions found in TPS80031/TPS80032
+         PMICs.
+
 config SYSRESET_SYSCON
        bool "Enable support for mfd syscon reboot driver"
        select REGMAP

diff --git a/drivers/sysreset/Makefile b/drivers/sysreset/Makefile
index c31f51c581a273eb733d49f331198d5d97106ea7..f62db899da7076b46daf37842034d12a5d2657d9 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_TPS80031) += sysreset_tps80031.o
 obj-$(CONFIG_SYSRESET_SYSCON) += sysreset_syscon.o
 obj-$(CONFIG_SYSRESET_WATCHDOG) += sysreset_watchdog.o
 obj-$(CONFIG_SYSRESET_RESETCTL) += sysreset_resetctl.o

diff --git a/drivers/sysreset/sysreset_tps80031.c b/drivers/sysreset/sysreset_tps80031.c
new file mode 100644 (file)
index 0000000..50024fe
--- /dev/null
+++ b/drivers/sysreset/sysreset_tps80031.c
@@ -0,0 +1,40 @@
+// 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/tps80031.h>
+
+static int tps80031_sysreset_request(struct udevice *dev,
+                                    enum sysreset_t type)
+{
+       switch (type) {
+       case SYSRESET_POWER:
+               /* TPS80031: SW_RESET > PHOENIX_DEV_ON */
+               pmic_reg_write(dev->parent, TPS80031_PHOENIX_DEV_ON, SW_RESET);
+               break;
+       case SYSRESET_POWER_OFF:
+               /* TPS80031: DEVOFF > PHOENIX_DEV_ON */
+               pmic_reg_write(dev->parent, TPS80031_PHOENIX_DEV_ON, DEVOFF);
+               break;
+       default:
+               return -EPROTONOSUPPORT;
+       }
+
+       return -EINPROGRESS;
+}
+
+static struct sysreset_ops tps80031_sysreset = {
+       .request = tps80031_sysreset_request,
+};
+
+U_BOOT_DRIVER(sysreset_tps80031) = {
+       .id     = UCLASS_SYSRESET,
+       .name   = TPS80031_RST_DRIVER,
+       .ops    = &tps80031_sysreset,
+};

diff --git a/include/power/tps80031.h b/include/power/tps80031.h
index c80692a8af649da2f21a1303c18d347dc8466c81..983c841bfe3ccc8f9ec137743a8e7fea991ceb6c 100644 (file)
--- a/include/power/tps80031.h
+++ b/include/power/tps80031.h
@@ -12,6 +12,7 @@
 /* Drivers name */
 #define TPS80031_LDO_DRIVER            "tps80031_ldo"
 #define TPS80031_SMPS_DRIVER           "tps80031_smps"
+#define TPS80031_RST_DRIVER            "tps80031_rst"
 
 #define TPS80031_SMPS_OFFSET           0xe0
 #define TPS80031_OFFSET_FLAG           BIT(0)
@@ -35,6 +36,10 @@
 #define LDO_VOLT_MIN                   1018000
 #define LDO_VOLT_BASE                  916000
 
+#define TPS80031_PHOENIX_DEV_ON                0x25
+#define   SW_RESET                     BIT(6)
+#define   DEVOFF                       BIT(0)
+
 /* register groups */
 enum {
        CTRL,