aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/mxs/patches-4.1/101-mxs-add-mxs_power.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/mxs/patches-4.1/101-mxs-add-mxs_power.patch')
-rw-r--r--target/linux/mxs/patches-4.1/101-mxs-add-mxs_power.patch173
1 files changed, 173 insertions, 0 deletions
diff --git a/target/linux/mxs/patches-4.1/101-mxs-add-mxs_power.patch b/target/linux/mxs/patches-4.1/101-mxs-add-mxs_power.patch
new file mode 100644
index 0000000000..8c087dcb98
--- /dev/null
+++ b/target/linux/mxs/patches-4.1/101-mxs-add-mxs_power.patch
@@ -0,0 +1,173 @@
+diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
+index 4091fb0..0fcc158 100644
+--- a/drivers/power/Kconfig
++++ b/drivers/power/Kconfig
+@@ -43,6 +43,14 @@ config MAX8925_POWER
+ Say Y here to enable support for the battery charger in the Maxim
+ MAX8925 PMIC.
+
++config MXS_POWER
++ tristate "Freescale MXS power subsystem support"
++ depends on ARCH_MXS || COMPILE_TEST
++ help
++ Say Y here to enable support for the Freescale i.MX23/i.MX28
++ power subsystem. This is a requirement to get access to on-chip
++ regulators, battery charger and many more.
++
+ config WM831X_BACKUP
+ tristate "WM831X backup battery charger support"
+ depends on MFD_WM831X
+diff --git a/drivers/power/Makefile b/drivers/power/Makefile
+index b7b0181..8edcad7 100644
+--- a/drivers/power/Makefile
++++ b/drivers/power/Makefile
+@@ -10,6 +10,7 @@ obj-$(CONFIG_GENERIC_ADC_BATTERY) += generic-adc-battery.o
+ obj-$(CONFIG_PDA_POWER) += pda_power.o
+ obj-$(CONFIG_APM_POWER) += apm_power.o
+ obj-$(CONFIG_MAX8925_POWER) += max8925_power.o
++obj-$(CONFIG_MXS_POWER) += mxs_power.o
+ obj-$(CONFIG_WM831X_BACKUP) += wm831x_backup.o
+ obj-$(CONFIG_WM831X_POWER) += wm831x_power.o
+ obj-$(CONFIG_WM8350_POWER) += wm8350_power.o
+diff --git a/drivers/power/mxs_power.c b/drivers/power/mxs_power.c
+new file mode 100644
+index 0000000..669bfb1
+--- /dev/null
++++ b/drivers/power/mxs_power.c
+@@ -0,0 +1,136 @@
++/*
++ * Freescale MXS power subsystem
++ *
++ * Copyright (C) 2014 Stefan Wahren
++ *
++ * Inspired by imx-bootlets
++ */
++
++/*
++ * The code contained herein is licensed under the GNU General Public
++ * License. You may obtain a copy of the GNU General Public License
++ * Version 2 or later at the following locations:
++ *
++ * http://www.opensource.org/licenses/gpl-license.html
++ * http://www.gnu.org/copyleft/gpl.html
++ */
++
++#include <linux/device.h>
++#include <linux/err.h>
++#include <linux/io.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/of_platform.h>
++#include <linux/platform_device.h>
++#include <linux/power_supply.h>
++#include <linux/stmp_device.h>
++#include <linux/types.h>
++
++#define BM_POWER_CTRL_POLARITY_VBUSVALID BIT(5)
++#define BM_POWER_CTRL_VBUSVALID_IRQ BIT(4)
++#define BM_POWER_CTRL_ENIRQ_VBUS_VALID BIT(3)
++
++#define HW_POWER_5VCTRL_OFFSET 0x10
++
++#define BM_POWER_5VCTRL_VBUSVALID_THRESH (7 << 8)
++#define BM_POWER_5VCTRL_PWDN_5VBRNOUT BIT(7)
++#define BM_POWER_5VCTRL_ENABLE_LINREG_ILIMIT BIT(6)
++#define BM_POWER_5VCTRL_VBUSVALID_5VDETECT BIT(4)
++
++#define HW_POWER_5VCTRL_VBUSVALID_THRESH_4_40V (5 << 8)
++
++struct mxs_power_data {
++ void __iomem *base_addr;
++ struct power_supply *ac;
++};
++
++static enum power_supply_property mxs_power_ac_props[] = {
++ POWER_SUPPLY_PROP_ONLINE,
++};
++
++static int mxs_power_ac_get_property(struct power_supply *psy,
++ enum power_supply_property psp,
++ union power_supply_propval *val)
++{
++ int ret = 0;
++
++ switch (psp) {
++ case POWER_SUPPLY_PROP_ONLINE:
++ val->intval = 1;
++ break;
++ default:
++ ret = -EINVAL;
++ break;
++ }
++ return ret;
++}
++
++static const struct of_device_id of_mxs_power_match[] = {
++ { .compatible = "fsl,imx23-power" },
++ { .compatible = "fsl,imx28-power" },
++ { /* end */ }
++};
++MODULE_DEVICE_TABLE(of, of_mxs_power_match);
++
++static const struct power_supply_desc ac_desc = {
++ .properties = mxs_power_ac_props,
++ .num_properties = ARRAY_SIZE(mxs_power_ac_props),
++ .get_property = mxs_power_ac_get_property,
++ .name = "ac",
++ .type = POWER_SUPPLY_TYPE_MAINS,
++};
++
++static int mxs_power_probe(struct platform_device *pdev)
++{
++ struct device *dev = &pdev->dev;
++ struct device_node *np = dev->of_node;
++ struct resource *res;
++ struct mxs_power_data *data;
++ struct power_supply_config psy_cfg = {};
++ void __iomem *v5ctrl_addr;
++
++ if (!np) {
++ dev_err(dev, "missing device tree\n");
++ return -EINVAL;
++ }
++
++ data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
++ if (!data)
++ return -ENOMEM;
++
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ data->base_addr = devm_ioremap_resource(dev, res);
++ if (IS_ERR(data->base_addr))
++ return PTR_ERR(data->base_addr);
++
++ psy_cfg.drv_data = data;
++
++ data->ac = devm_power_supply_register(dev, &ac_desc, &psy_cfg);
++ if (IS_ERR(data->ac))
++ return PTR_ERR(data->ac);
++
++ platform_set_drvdata(pdev, data);
++
++ v5ctrl_addr = data->base_addr + HW_POWER_5VCTRL_OFFSET;
++
++ /* Make sure the current limit of the linregs are disabled. */
++ writel(BM_POWER_5VCTRL_ENABLE_LINREG_ILIMIT,
++ v5ctrl_addr + STMP_OFFSET_REG_CLR);
++
++ return of_platform_populate(np, NULL, NULL, dev);
++}
++
++static struct platform_driver mxs_power_driver = {
++ .driver = {
++ .name = "mxs_power",
++ .of_match_table = of_mxs_power_match,
++ },
++ .probe = mxs_power_probe,
++};
++
++module_platform_driver(mxs_power_driver);
++
++MODULE_AUTHOR("Stefan Wahren <stefan.wahren@i2se.com>");
++MODULE_DESCRIPTION("Freescale MXS power subsystem");
++MODULE_LICENSE("GPL v2");