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314291fb10
Add support for DMS-BA16 board Signed-off-by: Ken Lin <yungching0725@gmail.com> Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
224 lines
6.7 KiB
Diff
224 lines
6.7 KiB
Diff
From f4d37d3abc522e72bebc2310d478cb5ebed24a4a Mon Sep 17 00:00:00 2001
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From: Ken Lin <yungching0725@gmail.com>
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Date: Thu, 1 Mar 2018 08:16:47 +0800
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Subject: [PATCH 4/4] da9063: Add a PMIC qurk to support system suspend/resume
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and shutdown
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Add a platfrom specific qurik to adjust PMIC power rails during suspend/resume and shutdown
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---
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arch/arm/mach-imx/Makefile | 2 +-
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arch/arm/mach-imx/mach-dms-ba16.c | 188 ++++++++++++++++++++++++++++++++++++++
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2 files changed, 189 insertions(+), 1 deletion(-)
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create mode 100644 arch/arm/mach-imx/mach-dms-ba16.c
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diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
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index 5d43296bdbe4..6bae5db72870 100644
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--- a/arch/arm/mach-imx/Makefile
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+++ b/arch/arm/mach-imx/Makefile
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@@ -93,7 +93,7 @@ AFLAGS_ddr3_freq_imx6.o :=-Wa,-march=armv7-a
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AFLAGS_smp_wfe_imx6.o :=-Wa,-march=armv7-a
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AFLAGS_lpddr2_freq_imx6q.o :=-Wa,-march=armv7-a
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obj-$(CONFIG_SOC_IMX6Q) += mach-imx6q.o ddr3_freq_imx6.o smp_wfe_imx6.o \
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- lpddr2_freq_imx6q.o
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+ lpddr2_freq_imx6q.o mach-dms-ba16.o
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AFLAGS_lpddr2_freq_imx6.o :=-Wa,-march=armv7-a
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obj-$(CONFIG_SOC_IMX6SL) += mach-imx6sl.o lpddr2_freq_imx6.o
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AFLAGS_lpddr2_freq_imx6sll.o :=-Wa,-march=armv7-a
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diff --git a/arch/arm/mach-imx/mach-dms-ba16.c b/arch/arm/mach-imx/mach-dms-ba16.c
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new file mode 100644
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index 000000000000..ac6e6a0ca7a0
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--- /dev/null
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+++ b/arch/arm/mach-imx/mach-dms-ba16.c
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@@ -0,0 +1,188 @@
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+/*
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+ * Platform suspend/resume/poweroff quirk example
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+ *
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+ * Copyright (C) 2015 Dialog Semiconductor Ltd
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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; version 2 of the License.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ */
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+
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+#include <linux/device.h>
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+#include <linux/i2c.h>
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+#include <linux/init.h>
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+#include <linux/io.h>
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+#include <linux/notifier.h>
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+#include <linux/of.h>
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+#include <linux/mfd/da9063/registers.h>
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+#include <linux/pm.h>
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+#include <linux/suspend.h>
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+#include <linux/reboot.h>
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+#include <linux/delay.h>
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+#include <linux/regulator/machine.h>
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+#include <linux/gpio.h>
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+#include "hardware.h"
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+
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+#define SUS_S3_OUT IMX_GPIO_NR(4, 11)
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+static struct i2c_client *da9063_client;
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+
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+static int dms_ba16_suspend_pm_cb(struct notifier_block *nb,
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+ unsigned long action, void *ptr)
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+{
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+ switch (action) {
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+ case PM_SUSPEND_PREPARE:
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+ case PM_HIBERNATION_PREPARE:
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+ /*
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+ * E.G. ADJUST PMIC SEQUENCER FOR SUSPEND
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+ * E.G. MANIPULATE CONTROL LINE USAGE
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+ * i2c_smbus_write_byte_data(dms_ba16_client, <REGISTER>, <VALUE>);
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+ */
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+
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+ gpio_direction_output(SUS_S3_OUT, 0); /*Set SUS_S3 low during suspend*/
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+
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+ break;
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+ case PM_POST_SUSPEND:
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+ case PM_POST_HIBERNATION:
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+ /*
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+ * RESTORE PMIC SEQUENCER / CONTROL LINES
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+ * i2c_smbus_write_byte_data(dms_ba16_client, <REGISTER>, <VALUE>);
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+ */
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+ i2c_smbus_write_byte_data(da9063_client,0xA4,0x70); // VBCORE1_A(1.42V)
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+ i2c_smbus_write_byte_data(da9063_client,0xA3,0x70); // VBCORE2_A(1.42V)
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+ i2c_smbus_write_byte_data(da9063_client,0xA5,0x61); // VBPRO_A(1.5V)
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+ i2c_smbus_write_byte_data(da9063_client,0xA6,0x32); // VBMEM_A(1.8V)
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+ i2c_smbus_write_byte_data(da9063_client,0xA7,0x32); // VBIO_A(1.8V)
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+ i2c_smbus_write_byte_data(da9063_client,0xA8,0x7d); // VBPERI_A(3.3V)
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+
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+
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+ gpio_direction_output(SUS_S3_OUT, 1); /*Set SUS_S3 high during resume*/
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+
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+ break;
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+ default:
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+ return NOTIFY_DONE;
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+ }
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+ return NOTIFY_OK;
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+}
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+
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+static void dms_ba16_poweroff_quirk(void)
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+{
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+ /*
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+ * Do nothing - this must be assigned as pm_power_off callback, or
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+ * otherwise /kernel/reboot.c : SYSCALL_DEFINE4(reboot, ... reduces
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+ * LINUX_REBOOT_CMD_POWER_OFF to LINUX_REBOOT_CMD_HALT
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+ * and so the pm_power_off_prepare callback would never be used!
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+ *
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+ * This callback is now apparently too late in the power off process
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+ * for dms_ba16 I2C work, as it caused a stack dump with the message:
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+ * WARNING: CPU: 0 PID: 50 at kernel/workqueue.c:1958
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+ * process_one_work+0x3bc/0x424()
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+ */
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+}
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+static void da9063_poweroff_prepare_quirk(void)
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+{
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+ /* E.G. SET PMIC MODE AND POWER OFF */
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+ u8 val = 0;
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+
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+
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+ printk(KERN_ALERT "Poweroff DA9063\n");
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+
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+
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+ i2c_smbus_write_byte_data(da9063_client, DA9063_REG_CONTROL_F,DA9063_SHUTDOWN);
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+
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+
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+ while (1);
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+
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+ return;
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+}
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+
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+static int dms_ba16_reboot_notify(struct notifier_block *nb,
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+ unsigned long action, void *data)
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+{
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+ switch (action) {
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+ case SYS_POWER_OFF:
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+ break;
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+ case SYS_HALT:
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+ case SYS_RESTART:
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+ /*
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+ * E.G. RESTORE PMIC SEQUENCER
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+ * E.G. MODIFY GPIO TO RESET SLAVE DEVICE
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+ * i2c_smbus_write_byte_data(dms_ba16_client, <REGISTER>, <VALUE>);
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+ */
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+ break;
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+ default:
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+ break;
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+ }
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+ return 0;
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+}
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+
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+static struct notifier_block dms_ba16_reboot_nb = {
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+ .notifier_call = dms_ba16_reboot_notify
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+};
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+
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+static int platform_i2c_bus_notify(struct notifier_block *nb,
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+ unsigned long action, void *data)
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+{
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+ struct device *dev = data;
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+ struct i2c_client *client;
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+
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+ if ((action != BUS_NOTIFY_ADD_DEVICE) ||
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+ (dev->type == &i2c_adapter_type))
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+ return 0;
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+
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+ client = to_i2c_client(dev);
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+
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+ if ((client->addr == 0x58 && !strcmp(client->name, "da9063"))) {
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+ da9063_client = client;
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+
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+ /*
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+ * E.G. SET IRQ MASKS
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+ * i2c_smbus_write_byte_data(dms_ba16_client, <REGISTER>, <VALUE>);
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+ */
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+
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+ /*
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+ * Register PM notifier for suspend/resume switchovers
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+ * of control
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+ */
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+
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+ i2c_smbus_write_byte_data(da9063_client,0x0B,0xF7); /*IRQ_MASK_B*/
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+ i2c_smbus_write_byte_data(da9063_client,0x25,0x9); /*BPERI_CONT keep BPERI_B voltage when supsend*/
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+ i2c_smbus_write_byte_data(da9063_client,0x24,0x1); /*BIO_CONT let BIO_B off when supsend*/
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+
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+
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+ gpio_direction_output(SUS_S3_OUT, 1); /*Set SUS_S3 high when power on*/
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+
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+ pm_notifier(dms_ba16_suspend_pm_cb, 0);
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+
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+ /* Register reboot notifier */
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+ register_reboot_notifier(&dms_ba16_reboot_nb);
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+
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+ /* Establish poweroff callback */
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+ printk(KERN_INFO "Installing DA9063 poweroff control\n");
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+ pm_power_off_prepare = da9063_poweroff_prepare_quirk;
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+ pm_power_off = dms_ba16_poweroff_quirk;
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+
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+ /* Get rid of this notification */
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+ bus_unregister_notifier(&i2c_bus_type, nb);
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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 struct notifier_block platform_i2c_bus_nb = {
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+ .notifier_call = platform_i2c_bus_notify
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+};
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+
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+static int __init platform_quirk(void)
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+{
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+ da9063_client = NULL;
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+ bus_register_notifier(&i2c_bus_type, &platform_i2c_bus_nb);
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+ return 0;
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+}
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+
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+arch_initcall(platform_quirk);
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+
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--
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2.11.0
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