diff options
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.patch | 173 |
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"); |