233 lines
6.1 KiB
Diff
233 lines
6.1 KiB
Diff
From 6932eadd168304b517e2b2eeaaf8cad510004acc Mon Sep 17 00:00:00 2001
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From: ckkim <changkon12@gmail.com>
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Date: Tue, 6 Oct 2020 17:37:40 +0900
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Subject: [PATCH 48/75] ODROID-COMMON: power:reset: Add odroid support
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Signed-off-by: ckkim <changkon12@gmail.com>
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Change-Id: I71955f76e5dbe0adb53a7cd62e747342c580209f
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---
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drivers/power/reset/Kconfig | 7 ++
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drivers/power/reset/Makefile | 1 +
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drivers/power/reset/odroid-reboot.c | 181 ++++++++++++++++++++++++++++
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3 files changed, 189 insertions(+)
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create mode 100644 drivers/power/reset/odroid-reboot.c
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diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
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index 4b563db3ab3e..11a626d5efee 100644
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--- a/drivers/power/reset/Kconfig
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+++ b/drivers/power/reset/Kconfig
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@@ -9,6 +9,13 @@ menuconfig POWER_RESET
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if POWER_RESET
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+config POWER_RESET_ODROID
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+ bool "odroid reboot/power-off driver"
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+ depends on ARCH_MESON
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+ help
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+ This driver supports restart / power off board for amlogic
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+ g12a/g12b/sm1 SoCs
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+
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config POWER_RESET_AS3722
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bool "ams AS3722 power-off driver"
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depends on MFD_AS3722
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diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile
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index f606a2f60539..9d3afae8e182 100644
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--- a/drivers/power/reset/Makefile
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+++ b/drivers/power/reset/Makefile
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@@ -1,4 +1,5 @@
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# SPDX-License-Identifier: GPL-2.0
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+obj-$(CONFIG_POWER_RESET_ODROID) += odroid-reboot.o
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obj-$(CONFIG_POWER_RESET_AS3722) += as3722-poweroff.o
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obj-$(CONFIG_POWER_RESET_AT91_POWEROFF) += at91-poweroff.o
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obj-$(CONFIG_POWER_RESET_AT91_RESET) += at91-reset.o
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diff --git a/drivers/power/reset/odroid-reboot.c b/drivers/power/reset/odroid-reboot.c
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new file mode 100644
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index 000000000000..68092141fbbb
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--- /dev/null
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+++ b/drivers/power/reset/odroid-reboot.c
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@@ -0,0 +1,181 @@
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+/*
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+ * drivers/power/reset/odroid-reboot.c
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+ *
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+ * Copyright (C) 2017 Amlogic, Inc. All rights reserved.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful, but WITHOUT
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+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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+ * more details.
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+ *
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+ */
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+
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+#include <linux/delay.h>
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+#include <linux/err.h>
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+#include <linux/init.h>
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+#include <linux/kernel.h>
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+#include <linux/io.h>
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+#include <linux/of.h>
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+#include <linux/platform_device.h>
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+#include <linux/module.h>
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+#include <linux/reboot.h>
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+
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+#include <asm/system_misc.h>
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+
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+#include <asm/compiler.h>
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+#include <linux/kdebug.h>
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+#include <linux/arm-smccc.h>
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+
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+#include <linux/gpio.h>
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+#include <linux/of_gpio.h>
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+
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+int sd_vqsw;
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+int sd_vmmc;
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+int sd_vqen;
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+
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+static u32 psci_function_id_restart;
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+static u32 psci_function_id_poweroff;
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+
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+#define CHECK_RET(ret) { \
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+ if (ret) \
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+ pr_err("[%s] gpio op failed(%d) at line %d\n",\
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+ __func__, ret, __LINE__); \
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+}
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+
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+static noinline int __invoke_psci_fn_smc(u64 function_id, u64 arg0, u64 arg1,
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+ u64 arg2)
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+{
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+ struct arm_smccc_res res;
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+
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+ arm_smccc_smc((unsigned long)function_id,
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+ (unsigned long)arg0,
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+ (unsigned long)arg1,
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+ (unsigned long)arg2,
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+ 0, 0, 0, 0, &res);
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+ return res.a0;
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+}
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+
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+void odroid_card_reset(void)
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+{
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+ int ret = 0;
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+
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+ if ((sd_vqsw == 0) && (sd_vmmc == 0))
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+ return;
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+
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+ if (sd_vqen == 0) {
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+ gpio_free(sd_vqsw);
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+ gpio_free(sd_vmmc);
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+ ret = gpio_request_one(sd_vqsw,
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+ GPIOF_OUT_INIT_LOW, "REBOOT");
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+ CHECK_RET(ret);
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+ mdelay(10);
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+ ret = gpio_direction_output(sd_vqsw, 1);
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+ CHECK_RET(ret);
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+ ret = gpio_request_one(sd_vmmc,
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+ GPIOF_OUT_INIT_LOW, "REBOOT");
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+ CHECK_RET(ret);
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+ mdelay(10);
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+ ret = gpio_direction_output(sd_vqsw, 0);
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+ CHECK_RET(ret);
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+ ret = gpio_direction_output(sd_vmmc, 1);
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+ CHECK_RET(ret);
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+ mdelay(5);
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+ gpio_free(sd_vqsw);
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+ gpio_free(sd_vmmc);
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+ } else {
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+ gpio_free(sd_vqsw);
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+ gpio_free(sd_vqen);
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+ gpio_free(sd_vmmc);
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+
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+ ret = gpio_request_one(sd_vqsw,
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+ GPIOF_OUT_INIT_LOW, "REBOOT");
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+ CHECK_RET(ret);
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+ ret = gpio_request_one(sd_vqen,
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+ GPIOF_OUT_INIT_LOW, "REBOOT");
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+ CHECK_RET(ret);
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+ ret = gpio_request_one(sd_vmmc,
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+ GPIOF_OUT_INIT_LOW, "REBOOT");
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+ CHECK_RET(ret);
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+ mdelay(100);
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+ ret = gpio_direction_input(sd_vqen);
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+ CHECK_RET(ret);
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+ ret = gpio_direction_input(sd_vmmc);
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+ CHECK_RET(ret);
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+ ret = gpio_direction_input(sd_vqsw);
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+ CHECK_RET(ret);
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+ mdelay(5);
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+ gpio_free(sd_vqen);
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+ gpio_free(sd_vmmc);
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+ gpio_free(sd_vqsw);
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+ }
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+}
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+
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+static void do_odroid_restart(enum reboot_mode reboot_mode, const char *cmd)
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+{
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+ odroid_card_reset();
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+ __invoke_psci_fn_smc(psci_function_id_restart,
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+ 0, 0, 0);
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+}
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+
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+static void do_odroid_poweroff(void)
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+{
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+ odroid_card_reset();
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+
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+ __invoke_psci_fn_smc(0x82000042, 1, 0, 0);
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+ __invoke_psci_fn_smc(psci_function_id_poweroff,
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+ 0, 0, 0);
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+}
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+
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+static int odroid_restart_probe(struct platform_device *pdev)
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+{
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+ struct device_node *of_node;
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+ u32 id;
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+
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+ if (!of_property_read_u32(pdev->dev.of_node, "sys_reset", &id)) {
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+ psci_function_id_restart = id;
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+ arm_pm_restart = do_odroid_restart;
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+ }
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+
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+ if (!of_property_read_u32(pdev->dev.of_node, "sys_poweroff", &id)) {
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+ psci_function_id_poweroff = id;
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+ pm_power_off = do_odroid_poweroff;
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+ }
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+
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+ of_node = pdev->dev.of_node;
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+
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+ sd_vqsw = of_get_named_gpio(of_node, "sd-vqsw", 0);
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+ if (!gpio_is_valid(sd_vqsw)) sd_vqsw = 0;
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+
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+ sd_vmmc = of_get_named_gpio(of_node, "sd-vmmc", 0);
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+ if (!gpio_is_valid(sd_vmmc)) sd_vmmc = 0;
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+
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+ sd_vqen = of_get_named_gpio(of_node, "sd-vqen", 0);
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+ if (!gpio_is_valid(sd_vqen)) sd_vqen = 0;
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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 of_device_id of_odroid_restart_match[] = {
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+ { .compatible = "odroid,reboot", },
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+ {},
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+};
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+MODULE_DEVICE_TABLE(of, of_odroid_restart_match);
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+
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+static struct platform_driver odroid_restart_driver = {
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+ .probe = odroid_restart_probe,
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+ .driver = {
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+ .name = "odroid-restart",
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+ .of_match_table = of_match_ptr(of_odroid_restart_match),
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+ },
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+};
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+
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+static int __init odroid_restart_init(void)
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+{
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+ return platform_driver_register(&odroid_restart_driver);
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+}
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+device_initcall(odroid_restart_init);
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--
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2.25.1
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