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https://github.com/thead-yocto-mirror/meta-riscv
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a680163804
apply patches from https://github.com/starfive-tech/linux/issues/8 Signed-off-by: Khem Raj <raj.khem@gmail.com>
166 lines
4.8 KiB
Diff
166 lines
4.8 KiB
Diff
From c2aa0b4586f6fe53390905603485a6f801f689a2 Mon Sep 17 00:00:00 2001
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From: Emil Renner Berthing <kernel@esmil.dk>
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Date: Mon, 3 May 2021 12:20:05 +0200
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Subject: [PATCH 1/3] power: reset: Add TPS65086 restart driver
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Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
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---
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drivers/mfd/tps65086.c | 1 +
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drivers/power/reset/Kconfig | 6 ++
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drivers/power/reset/Makefile | 1 +
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drivers/power/reset/tps65086-restart.c | 101 +++++++++++++++++++++++++
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4 files changed, 109 insertions(+)
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create mode 100644 drivers/power/reset/tps65086-restart.c
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diff --git a/drivers/mfd/tps65086.c b/drivers/mfd/tps65086.c
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index 341466ef20cc..e08823736fe9 100644
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--- a/drivers/mfd/tps65086.c
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+++ b/drivers/mfd/tps65086.c
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@@ -24,6 +24,7 @@
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static const struct mfd_cell tps65086_cells[] = {
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{ .name = "tps65086-regulator", },
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{ .name = "tps65086-gpio", },
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+ { .name = "tps65086-restart", },
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};
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static const struct regmap_range tps65086_yes_ranges[] = {
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diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
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index d55b3727e00e..fd212a6b1143 100644
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--- a/drivers/power/reset/Kconfig
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+++ b/drivers/power/reset/Kconfig
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@@ -190,6 +190,12 @@ config POWER_RESET_ST
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help
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Reset support for STMicroelectronics boards.
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+config POWER_RESET_TPS65086
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+ bool "TPS65086 restart driver"
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+ depends on MFD_TPS65086
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+ help
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+ Reset TPS65086 PMIC on restart.
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+
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config POWER_RESET_VERSATILE
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bool "ARM Versatile family reboot driver"
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depends on ARM
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diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile
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index c51eceba9ea3..d9bb7e2a6f80 100644
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--- a/drivers/power/reset/Makefile
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+++ b/drivers/power/reset/Makefile
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@@ -21,6 +21,7 @@ obj-$(CONFIG_POWER_RESET_LTC2952) += ltc2952-poweroff.o
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obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o
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obj-$(CONFIG_POWER_RESET_RESTART) += restart-poweroff.o
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obj-$(CONFIG_POWER_RESET_ST) += st-poweroff.o
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+obj-$(CONFIG_POWER_RESET_TPS65086) += tps65086-restart.o
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obj-$(CONFIG_POWER_RESET_VERSATILE) += arm-versatile-reboot.o
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obj-$(CONFIG_POWER_RESET_VEXPRESS) += vexpress-poweroff.o
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obj-$(CONFIG_POWER_RESET_XGENE) += xgene-reboot.o
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diff --git a/drivers/power/reset/tps65086-restart.c b/drivers/power/reset/tps65086-restart.c
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new file mode 100644
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index 000000000000..8c47d534d08a
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--- /dev/null
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+++ b/drivers/power/reset/tps65086-restart.c
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@@ -0,0 +1,101 @@
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+// SPDX-License-Identifier: GPL-2.0
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+/*
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+ * Copyright (C) 2021 Emil Renner Berthing
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+ */
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+
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+#include <linux/reboot.h>
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+#include <linux/mod_devicetable.h>
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+#include <linux/module.h>
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+#include <linux/platform_device.h>
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+
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+#include <linux/mfd/tps65086.h>
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+
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+struct tps65086_restart {
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+ struct notifier_block handler;
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+ struct tps65086 *tps;
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+ struct device *dev;
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+};
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+
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+static int tps65086_restart_notify(struct notifier_block *this,
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+ unsigned long mode, void *cmd)
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+{
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+ struct tps65086_restart *tps65086_restart =
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+ container_of(this, struct tps65086_restart, handler);
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+ int ret;
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+
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+ ret = regmap_write(tps65086_restart->tps->regmap, TPS65086_FORCESHUTDN, 1);
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+ if (ret) {
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+ dev_err(tps65086_restart->dev, "%s: error writing to tps65086 pmic: %d\n",
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+ __func__, ret);
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+ return NOTIFY_DONE;
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+ }
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+
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+ /* give it a little time */
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+ mdelay(200);
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+
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+ WARN_ON(1);
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+
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+ return NOTIFY_DONE;
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+}
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+
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+static int tps65086_restart_probe(struct platform_device *pdev)
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+{
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+ struct tps65086_restart *tps65086_restart;
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+ int ret;
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+
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+ tps65086_restart = devm_kzalloc(&pdev->dev, sizeof(*tps65086_restart), GFP_KERNEL);
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+ if (!tps65086_restart)
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+ return -ENOMEM;
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+
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+ platform_set_drvdata(pdev, tps65086_restart);
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+
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+ tps65086_restart->handler.notifier_call = tps65086_restart_notify;
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+ tps65086_restart->handler.priority = 192;
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+ tps65086_restart->tps = dev_get_drvdata(pdev->dev.parent);
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+ tps65086_restart->dev = &pdev->dev;
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+
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+ ret = register_restart_handler(&tps65086_restart->handler);
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+ if (ret) {
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+ dev_err(&pdev->dev, "%s: cannot register restart handler: %d\n",
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+ __func__, ret);
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+ return -ENODEV;
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+ }
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+
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+ return 0;
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+}
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+
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+static int tps65086_restart_remove(struct platform_device *pdev)
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+{
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+ struct tps65086_restart *tps65086_restart = platform_get_drvdata(pdev);
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+ int ret;
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+
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+ ret = unregister_restart_handler(&tps65086_restart->handler);
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+ if (ret) {
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+ dev_err(&pdev->dev,
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+ "%s: cannot unregister restart handler: %d\n",
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+ __func__, ret);
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+ return -ENODEV;
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+ }
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+
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+ return 0;
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+}
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+
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+static const struct platform_device_id tps65086_restart_id_table[] = {
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+ { "tps65086-restart", },
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+ { /* sentinel */ }
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+};
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+MODULE_DEVICE_TABLE(platform, tps65086_restart_id_table);
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+
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+static struct platform_driver tps65086_restart_driver = {
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+ .driver = {
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+ .name = "tps65086-restart",
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+ },
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+ .probe = tps65086_restart_probe,
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+ .remove = tps65086_restart_remove,
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+ .id_table = tps65086_restart_id_table,
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+};
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+module_platform_driver(tps65086_restart_driver);
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+
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+MODULE_AUTHOR("Emil Renner Berthing <kernel@esmil.dk>");
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+MODULE_DESCRIPTION("TPS65086 restart driver");
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+MODULE_LICENSE("GPL v2");
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--
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2.31.1
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