mirror of
https://github.com/Ysurac/openmptcprouter.git
synced 2025-02-13 20:01:55 +00:00
160 lines
4.9 KiB
Diff
160 lines
4.9 KiB
Diff
From 559614ab0ae2c85596218226f095be36c12cf0fa Mon Sep 17 00:00:00 2001
|
|
From: Josef Friedl <josef.friedl@speed.at>
|
|
Date: Wed, 3 Jul 2019 12:24:52 +0200
|
|
Subject: [PATCH] power: reset: add driver for mt6323 poweroff
|
|
|
|
add poweroff driver for mt6323 and make Makefile and Kconfig-Entries
|
|
|
|
Suggested-by: Frank Wunderlich <frank-w@public-files.de>
|
|
Signed-off-by: Josef Friedl <josef.friedl@speed.at>
|
|
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
|
|
Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com>
|
|
---
|
|
changes since v6: none
|
|
changes since v5: split out mfd/mt6397/core.h
|
|
changes since v4: none
|
|
changes since v3: none
|
|
changes since v2: none (=v2 part 5)
|
|
---
|
|
drivers/power/reset/Kconfig | 10 +++
|
|
drivers/power/reset/Makefile | 1 +
|
|
drivers/power/reset/mt6323-poweroff.c | 97 +++++++++++++++++++++++++++
|
|
3 files changed, 108 insertions(+)
|
|
create mode 100644 drivers/power/reset/mt6323-poweroff.c
|
|
|
|
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
|
|
index a564237278ff..c721939767eb 100644
|
|
--- a/drivers/power/reset/Kconfig
|
|
+++ b/drivers/power/reset/Kconfig
|
|
@@ -140,6 +140,16 @@ config POWER_RESET_LTC2952
|
|
This driver supports an external powerdown trigger and board power
|
|
down via the LTC2952. Bindings are made in the device tree.
|
|
|
|
+config POWER_RESET_MT6323
|
|
+ bool "MediaTek MT6323 power-off driver"
|
|
+ depends on MFD_MT6397
|
|
+ help
|
|
+ The power-off driver is responsible for externally shutdown down
|
|
+ the power of a remote MediaTek SoC MT6323 is connected to through
|
|
+ controlling a tiny circuit BBPU inside MT6323 RTC.
|
|
+
|
|
+ Say Y if you have a board where MT6323 could be found.
|
|
+
|
|
config POWER_RESET_QNAP
|
|
bool "QNAP power-off driver"
|
|
depends on OF_GPIO && PLAT_ORION
|
|
diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile
|
|
index 85da3198e4e0..da37f8b851dc 100644
|
|
--- a/drivers/power/reset/Makefile
|
|
+++ b/drivers/power/reset/Makefile
|
|
@@ -11,6 +11,7 @@ obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o
|
|
obj-$(CONFIG_POWER_RESET_GPIO_RESTART) += gpio-restart.o
|
|
obj-$(CONFIG_POWER_RESET_HISI) += hisi-reboot.o
|
|
obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o
|
|
+obj-$(CONFIG_POWER_RESET_MT6323) += mt6323-poweroff.o
|
|
obj-$(CONFIG_POWER_RESET_QCOM_PON) += qcom-pon.o
|
|
obj-$(CONFIG_POWER_RESET_OCELOT_RESET) += ocelot-reset.o
|
|
obj-$(CONFIG_POWER_RESET_PIIX4_POWEROFF) += piix4-poweroff.o
|
|
diff --git a/drivers/power/reset/mt6323-poweroff.c b/drivers/power/reset/mt6323-poweroff.c
|
|
new file mode 100644
|
|
index 000000000000..1caf43d9e46d
|
|
--- /dev/null
|
|
+++ b/drivers/power/reset/mt6323-poweroff.c
|
|
@@ -0,0 +1,97 @@
|
|
+// SPDX-License-Identifier: GPL-2.0
|
|
+/*
|
|
+ * Power off through MediaTek PMIC
|
|
+ *
|
|
+ * Copyright (C) 2018 MediaTek Inc.
|
|
+ *
|
|
+ * Author: Sean Wang <sean.wang@mediatek.com>
|
|
+ *
|
|
+ */
|
|
+
|
|
+#include <linux/err.h>
|
|
+#include <linux/module.h>
|
|
+#include <linux/of.h>
|
|
+#include <linux/platform_device.h>
|
|
+#include <linux/mfd/mt6397/core.h>
|
|
+#include <linux/mfd/mt6397/rtc.h>
|
|
+
|
|
+struct mt6323_pwrc {
|
|
+ struct device *dev;
|
|
+ struct regmap *regmap;
|
|
+ u32 base;
|
|
+};
|
|
+
|
|
+static struct mt6323_pwrc *mt_pwrc;
|
|
+
|
|
+static void mt6323_do_pwroff(void)
|
|
+{
|
|
+ struct mt6323_pwrc *pwrc = mt_pwrc;
|
|
+ unsigned int val;
|
|
+ int ret;
|
|
+
|
|
+ regmap_write(pwrc->regmap, pwrc->base + RTC_BBPU, RTC_BBPU_KEY);
|
|
+ regmap_write(pwrc->regmap, pwrc->base + RTC_WRTGR, 1);
|
|
+
|
|
+ ret = regmap_read_poll_timeout(pwrc->regmap,
|
|
+ pwrc->base + RTC_BBPU, val,
|
|
+ !(val & RTC_BBPU_CBUSY),
|
|
+ MTK_RTC_POLL_DELAY_US,
|
|
+ MTK_RTC_POLL_TIMEOUT);
|
|
+ if (ret)
|
|
+ dev_err(pwrc->dev, "failed to write BBPU: %d\n", ret);
|
|
+
|
|
+ /* Wait some time until system down, otherwise, notice with a warn */
|
|
+ mdelay(1000);
|
|
+
|
|
+ WARN_ONCE(1, "Unable to power off system\n");
|
|
+}
|
|
+
|
|
+static int mt6323_pwrc_probe(struct platform_device *pdev)
|
|
+{
|
|
+ struct mt6397_chip *mt6397_chip = dev_get_drvdata(pdev->dev.parent);
|
|
+ struct mt6323_pwrc *pwrc;
|
|
+ struct resource *res;
|
|
+
|
|
+ pwrc = devm_kzalloc(&pdev->dev, sizeof(*pwrc), GFP_KERNEL);
|
|
+ if (!pwrc)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
+ pwrc->base = res->start;
|
|
+ pwrc->regmap = mt6397_chip->regmap;
|
|
+ pwrc->dev = &pdev->dev;
|
|
+ mt_pwrc = pwrc;
|
|
+
|
|
+ pm_power_off = &mt6323_do_pwroff;
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int mt6323_pwrc_remove(struct platform_device *pdev)
|
|
+{
|
|
+ if (pm_power_off == &mt6323_do_pwroff)
|
|
+ pm_power_off = NULL;
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static const struct of_device_id mt6323_pwrc_dt_match[] = {
|
|
+ { .compatible = "mediatek,mt6323-pwrc" },
|
|
+ {},
|
|
+};
|
|
+MODULE_DEVICE_TABLE(of, mt6323_pwrc_dt_match);
|
|
+
|
|
+static struct platform_driver mt6323_pwrc_driver = {
|
|
+ .probe = mt6323_pwrc_probe,
|
|
+ .remove = mt6323_pwrc_remove,
|
|
+ .driver = {
|
|
+ .name = "mt6323-pwrc",
|
|
+ .of_match_table = mt6323_pwrc_dt_match,
|
|
+ },
|
|
+};
|
|
+
|
|
+module_platform_driver(mt6323_pwrc_driver);
|
|
+
|
|
+MODULE_DESCRIPTION("Poweroff driver for MT6323 PMIC");
|
|
+MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
|
|
+MODULE_LICENSE("GPL v2");
|