bb48f6080c
BPI-CM4: In accordance with the BSP DTS, set LED gpio to GPIO_ACTIVE_LOW. Added default-on trigger to led-green Board now powers off, added reboot node 'meson64-reboot'. CONFIG_POWER_RESET_MESON64 Isolated RESET ODROID driver and renamed to MESON64 as it can be used in more than ODROIDS. MESON UART Series improves support for UART attached Bluetooth modules on Amlogic Meson G12A and newer SoCs. These SoCs also support the "divide XTAL by 2" bit which (greatly) reduces jitter when generating baud rates such as 1500000 (which is used by the Bluetooth part of the RTL8822CS SDIO WiFi and UART Bluetooth combo chip). Signed-off-by: Patrick Yavitz <pyavitz@gmail.com>
223 lines
5.9 KiB
Diff
223 lines
5.9 KiB
Diff
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
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index 4b563db3a..14396a3fc 100644
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--- a/drivers/power/reset/Kconfig
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+++ b/drivers/power/reset/Kconfig
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@@ -141,6 +141,13 @@ config POWER_RESET_OCELOT_RESET
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help
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This driver supports restart for Microsemi Ocelot SoC and similar.
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+config POWER_RESET_MESON64
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+ bool "Meson64 reboot/power-off driver"
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+ depends on ARCH_MESON
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+ help
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+ The driver supports restart / power off for amlogic
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+ g12a, g12b and sm1 SoCs
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+
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config POWER_RESET_OXNAS
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bool "OXNAS SoC restart driver"
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depends on ARCH_OXNAS
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diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile
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index f606a2f60..ce0149984 100644
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--- a/drivers/power/reset/Makefile
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+++ b/drivers/power/reset/Makefile
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@@ -14,6 +14,7 @@ obj-$(CONFIG_POWER_RESET_HISI) += hisi-reboot.o
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obj-$(CONFIG_POWER_RESET_LINKSTATION) += linkstation-poweroff.o
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obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o
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obj-$(CONFIG_POWER_RESET_MT6323) += mt6323-poweroff.o
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+obj-$(CONFIG_POWER_RESET_MESON64) += meson64-reboot.o
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obj-$(CONFIG_POWER_RESET_OXNAS) += oxnas-restart.o
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obj-$(CONFIG_POWER_RESET_QCOM_PON) += qcom-pon.o
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obj-$(CONFIG_POWER_RESET_OCELOT_RESET) += ocelot-reset.o
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diff --git a/drivers/power/reset/meson64-reboot.c b/drivers/power/reset/meson64-reboot.c
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new file mode 100644
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index 000000000..00fedd36b
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--- /dev/null
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+++ b/drivers/power/reset/meson64-reboot.c
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@@ -0,0 +1,186 @@
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+// SPDX-License-Identifier: (GPL-2.0)
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+/*
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+ * drivers/power/reset/meson64-reboot.c
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+ *
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+ * Copyright (C) 2017 Amlogic, Inc. All rights reserved.
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+ * Copyright (C) 2023 Ash Hughes (sehguh.hsa@gmail.com)
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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 meson64_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 int do_meson64_restart(struct notifier_block *this, unsigned long mode, void *cmd)
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+{
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+ meson64_card_reset();
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+ return NOTIFY_DONE;
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+}
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+
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+static struct notifier_block meson64_restart_handler = {
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+ .notifier_call = do_meson64_restart,
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+ .priority = 130,
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+};
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+
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+static void do_meson64_poweroff(void)
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+{
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+ meson64_card_reset();
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+
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+ __invoke_psci_fn_smc(0x82000042, 1, 0, 0);
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+}
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+
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+static int meson64_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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+ register_restart_handler(&meson64_restart_handler);
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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_meson64_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_meson64_restart_match[] = {
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+ { .compatible = "meson64,reboot", },
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+ {},
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+};
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+MODULE_DEVICE_TABLE(of, of_meson64_restart_match);
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+
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+static struct platform_driver meson64_restart_driver = {
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+ .probe = meson64_restart_probe,
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+ .driver = {
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+ .name = "meson64-restart",
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+ .of_match_table = of_match_ptr(of_meson64_restart_match),
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+ },
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+};
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+
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+static int __init meson64_restart_init(void)
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+{
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+ return platform_driver_register(&meson64_restart_driver);
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+}
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+device_initcall(meson64_restart_init);
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+
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