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authorRobin Gong <b38343@freescale.com>2014-11-12 16:20:38 +0800
committerShawn Guo <shawn.guo@linaro.org>2014-11-23 14:57:11 +0800
commit3db47dc0ae4d370ec3c86fc357608132ca695c27 (patch)
tree2111f40b612ccf19b0acb480f82c1e7a80d2e24a /drivers/power
parentcfd074ad860016d3aafd28a06b03d575d17aac0a (diff)
downloadlinux-3db47dc0ae4d370ec3c86fc357608132ca695c27.tar.bz2
power: reset: imx-snvs-poweroff: add power off driver for i.mx6
This driver register pm_power_off with snvs power off function. If your boards NOT use PMIC_ON_REQ to turn on/off external pmic, or use other pin to do, please disable the driver in dts, otherwise, your pm_power_off maybe overwrote by this driver. Signed-off-by: Robin Gong <b38343@freescale.com> Acked-By: Sebastian Reichel <sre@kernel.org> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/reset/Kconfig9
-rw-r--r--drivers/power/reset/Makefile1
-rw-r--r--drivers/power/reset/imx-snvs-poweroff.c66
3 files changed, 76 insertions, 0 deletions
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
index f65ff49bb275..028e76504519 100644
--- a/drivers/power/reset/Kconfig
+++ b/drivers/power/reset/Kconfig
@@ -71,6 +71,15 @@ config POWER_RESET_HISI
help
Reboot support for Hisilicon boards.
+config POWER_RESET_IMX
+ bool "IMX6 power-off driver"
+ depends on POWER_RESET && SOC_IMX6
+ help
+ This driver support power off external PMIC by PMIC_ON_REQ on i.mx6
+ boards.If you want to use other pin to control external power,please
+ say N here or disable in dts to make sure pm_power_off never be
+ overwrote wrongly by this driver.
+
config POWER_RESET_MSM
bool "Qualcomm MSM power-off driver"
depends on ARCH_QCOM
diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile
index 76ce1c59469b..1d4804d6b323 100644
--- a/drivers/power/reset/Makefile
+++ b/drivers/power/reset/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_POWER_RESET_BRCMSTB) += brcmstb-reboot.o
obj-$(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-$(CONFIG_POWER_RESET_IMX) += imx-snvs-poweroff.o
obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o
obj-$(CONFIG_POWER_RESET_LTC2952) += ltc2952-poweroff.o
obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o
diff --git a/drivers/power/reset/imx-snvs-poweroff.c b/drivers/power/reset/imx-snvs-poweroff.c
new file mode 100644
index 000000000000..ad6ce5020ea7
--- /dev/null
+++ b/drivers/power/reset/imx-snvs-poweroff.c
@@ -0,0 +1,66 @@
+/* Power off driver for i.mx6
+ * Copyright (c) 2014, FREESCALE CORPORATION. All rights reserved.
+ *
+ * based on msm-poweroff.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+
+static void __iomem *snvs_base;
+
+static void do_imx_poweroff(void)
+{
+ u32 value = readl(snvs_base);
+
+ /* set TOP and DP_EN bit */
+ writel(value | 0x60, snvs_base);
+}
+
+static int imx_poweroff_probe(struct platform_device *pdev)
+{
+ snvs_base = of_iomap(pdev->dev.of_node, 0);
+ if (!snvs_base) {
+ dev_err(&pdev->dev, "failed to get memory\n");
+ return -ENODEV;
+ }
+
+ pm_power_off = do_imx_poweroff;
+ return 0;
+}
+
+static const struct of_device_id of_imx_poweroff_match[] = {
+ { .compatible = "fsl,sec-v4.0-poweroff", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_imx_poweroff_match);
+
+static struct platform_driver imx_poweroff_driver = {
+ .probe = imx_poweroff_probe,
+ .driver = {
+ .name = "imx-snvs-poweroff",
+ .of_match_table = of_match_ptr(of_imx_poweroff_match),
+ },
+};
+
+static int __init imx_poweroff_init(void)
+{
+ return platform_driver_register(&imx_poweroff_driver);
+}
+device_initcall(imx_poweroff_init);