1 diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
2 index 4091fb0..0fcc158 100644
3 --- a/drivers/power/Kconfig
4 +++ b/drivers/power/Kconfig
5 @@ -43,6 +43,14 @@ config MAX8925_POWER
6 Say Y here to enable support for the battery charger in the Maxim
10 + tristate "Freescale MXS power subsystem support"
11 + depends on ARCH_MXS || COMPILE_TEST
13 + Say Y here to enable support for the Freescale i.MX23/i.MX28
14 + power subsystem. This is a requirement to get access to on-chip
15 + regulators, battery charger and many more.
18 tristate "WM831X backup battery charger support"
20 diff --git a/drivers/power/Makefile b/drivers/power/Makefile
21 index b7b0181..8edcad7 100644
22 --- a/drivers/power/Makefile
23 +++ b/drivers/power/Makefile
24 @@ -10,6 +10,7 @@ obj-$(CONFIG_GENERIC_ADC_BATTERY) += generic-adc-battery.o
25 obj-$(CONFIG_PDA_POWER) += pda_power.o
26 obj-$(CONFIG_APM_POWER) += apm_power.o
27 obj-$(CONFIG_MAX8925_POWER) += max8925_power.o
28 +obj-$(CONFIG_MXS_POWER) += mxs_power.o
29 obj-$(CONFIG_WM831X_BACKUP) += wm831x_backup.o
30 obj-$(CONFIG_WM831X_POWER) += wm831x_power.o
31 obj-$(CONFIG_WM8350_POWER) += wm8350_power.o
32 diff --git a/drivers/power/mxs_power.c b/drivers/power/mxs_power.c
34 index 0000000..669bfb1
36 +++ b/drivers/power/mxs_power.c
39 + * Freescale MXS power subsystem
41 + * Copyright (C) 2014 Stefan Wahren
43 + * Inspired by imx-bootlets
47 + * The code contained herein is licensed under the GNU General Public
48 + * License. You may obtain a copy of the GNU General Public License
49 + * Version 2 or later at the following locations:
51 + * http://www.opensource.org/licenses/gpl-license.html
52 + * http://www.gnu.org/copyleft/gpl.html
55 +#include <linux/device.h>
56 +#include <linux/err.h>
57 +#include <linux/io.h>
58 +#include <linux/kernel.h>
59 +#include <linux/module.h>
60 +#include <linux/of.h>
61 +#include <linux/of_platform.h>
62 +#include <linux/platform_device.h>
63 +#include <linux/power_supply.h>
64 +#include <linux/stmp_device.h>
65 +#include <linux/types.h>
67 +#define BM_POWER_CTRL_POLARITY_VBUSVALID BIT(5)
68 +#define BM_POWER_CTRL_VBUSVALID_IRQ BIT(4)
69 +#define BM_POWER_CTRL_ENIRQ_VBUS_VALID BIT(3)
71 +#define HW_POWER_5VCTRL_OFFSET 0x10
73 +#define BM_POWER_5VCTRL_VBUSVALID_THRESH (7 << 8)
74 +#define BM_POWER_5VCTRL_PWDN_5VBRNOUT BIT(7)
75 +#define BM_POWER_5VCTRL_ENABLE_LINREG_ILIMIT BIT(6)
76 +#define BM_POWER_5VCTRL_VBUSVALID_5VDETECT BIT(4)
78 +#define HW_POWER_5VCTRL_VBUSVALID_THRESH_4_40V (5 << 8)
80 +struct mxs_power_data {
81 + void __iomem *base_addr;
82 + struct power_supply *ac;
85 +static enum power_supply_property mxs_power_ac_props[] = {
86 + POWER_SUPPLY_PROP_ONLINE,
89 +static int mxs_power_ac_get_property(struct power_supply *psy,
90 + enum power_supply_property psp,
91 + union power_supply_propval *val)
96 + case POWER_SUPPLY_PROP_ONLINE:
106 +static const struct of_device_id of_mxs_power_match[] = {
107 + { .compatible = "fsl,imx23-power" },
108 + { .compatible = "fsl,imx28-power" },
111 +MODULE_DEVICE_TABLE(of, of_mxs_power_match);
113 +static const struct power_supply_desc ac_desc = {
114 + .properties = mxs_power_ac_props,
115 + .num_properties = ARRAY_SIZE(mxs_power_ac_props),
116 + .get_property = mxs_power_ac_get_property,
118 + .type = POWER_SUPPLY_TYPE_MAINS,
121 +static int mxs_power_probe(struct platform_device *pdev)
123 + struct device *dev = &pdev->dev;
124 + struct device_node *np = dev->of_node;
125 + struct resource *res;
126 + struct mxs_power_data *data;
127 + struct power_supply_config psy_cfg = {};
128 + void __iomem *v5ctrl_addr;
131 + dev_err(dev, "missing device tree\n");
135 + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
139 + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
140 + data->base_addr = devm_ioremap_resource(dev, res);
141 + if (IS_ERR(data->base_addr))
142 + return PTR_ERR(data->base_addr);
144 + psy_cfg.drv_data = data;
146 + data->ac = devm_power_supply_register(dev, &ac_desc, &psy_cfg);
147 + if (IS_ERR(data->ac))
148 + return PTR_ERR(data->ac);
150 + platform_set_drvdata(pdev, data);
152 + v5ctrl_addr = data->base_addr + HW_POWER_5VCTRL_OFFSET;
154 + /* Make sure the current limit of the linregs are disabled. */
155 + writel(BM_POWER_5VCTRL_ENABLE_LINREG_ILIMIT,
156 + v5ctrl_addr + STMP_OFFSET_REG_CLR);
158 + return of_platform_populate(np, NULL, NULL, dev);
161 +static struct platform_driver mxs_power_driver = {
163 + .name = "mxs_power",
164 + .of_match_table = of_mxs_power_match,
166 + .probe = mxs_power_probe,
169 +module_platform_driver(mxs_power_driver);
171 +MODULE_AUTHOR("Stefan Wahren <stefan.wahren@i2se.com>");
172 +MODULE_DESCRIPTION("Freescale MXS power subsystem");
173 +MODULE_LICENSE("GPL v2");