1 --- a/drivers/power/Kconfig
2 +++ b/drivers/power/Kconfig
3 @@ -43,6 +43,14 @@ config MAX8925_POWER
4 Say Y here to enable support for the battery charger in the Maxim
8 + tristate "Freescale MXS power subsystem support"
9 + depends on ARCH_MXS || COMPILE_TEST
11 + Say Y here to enable support for the Freescale i.MX23/i.MX28
12 + power subsystem. This is a requirement to get access to on-chip
13 + regulators, battery charger and many more.
16 tristate "WM831X backup battery charger support"
18 --- a/drivers/power/Makefile
19 +++ b/drivers/power/Makefile
20 @@ -11,6 +11,7 @@ obj-$(CONFIG_PDA_POWER) += pda_power.o
21 obj-$(CONFIG_APM_POWER) += apm_power.o
22 obj-$(CONFIG_AXP20X_POWER) += axp20x_usb_power.o
23 obj-$(CONFIG_MAX8925_POWER) += max8925_power.o
24 +obj-$(CONFIG_MXS_POWER) += mxs_power.o
25 obj-$(CONFIG_WM831X_BACKUP) += wm831x_backup.o
26 obj-$(CONFIG_WM831X_POWER) += wm831x_power.o
27 obj-$(CONFIG_WM8350_POWER) += wm8350_power.o
29 +++ b/drivers/power/mxs_power.c
32 + * Freescale MXS power subsystem
34 + * Copyright (C) 2014 Stefan Wahren
36 + * Inspired by imx-bootlets
40 + * The code contained herein is licensed under the GNU General Public
41 + * License. You may obtain a copy of the GNU General Public License
42 + * Version 2 or later at the following locations:
44 + * http://www.opensource.org/licenses/gpl-license.html
45 + * http://www.gnu.org/copyleft/gpl.html
48 +#include <linux/device.h>
49 +#include <linux/err.h>
50 +#include <linux/io.h>
51 +#include <linux/kernel.h>
52 +#include <linux/module.h>
53 +#include <linux/of.h>
54 +#include <linux/of_platform.h>
55 +#include <linux/platform_device.h>
56 +#include <linux/power_supply.h>
57 +#include <linux/stmp_device.h>
58 +#include <linux/types.h>
60 +#define BM_POWER_CTRL_POLARITY_VBUSVALID BIT(5)
61 +#define BM_POWER_CTRL_VBUSVALID_IRQ BIT(4)
62 +#define BM_POWER_CTRL_ENIRQ_VBUS_VALID BIT(3)
64 +#define HW_POWER_5VCTRL_OFFSET 0x10
66 +#define BM_POWER_5VCTRL_VBUSVALID_THRESH (7 << 8)
67 +#define BM_POWER_5VCTRL_PWDN_5VBRNOUT BIT(7)
68 +#define BM_POWER_5VCTRL_ENABLE_LINREG_ILIMIT BIT(6)
69 +#define BM_POWER_5VCTRL_VBUSVALID_5VDETECT BIT(4)
71 +#define HW_POWER_5VCTRL_VBUSVALID_THRESH_4_40V (5 << 8)
73 +struct mxs_power_data {
74 + void __iomem *base_addr;
75 + struct power_supply *ac;
78 +static enum power_supply_property mxs_power_ac_props[] = {
79 + POWER_SUPPLY_PROP_ONLINE,
82 +static int mxs_power_ac_get_property(struct power_supply *psy,
83 + enum power_supply_property psp,
84 + union power_supply_propval *val)
89 + case POWER_SUPPLY_PROP_ONLINE:
99 +static const struct of_device_id of_mxs_power_match[] = {
100 + { .compatible = "fsl,imx23-power" },
101 + { .compatible = "fsl,imx28-power" },
104 +MODULE_DEVICE_TABLE(of, of_mxs_power_match);
106 +static const struct power_supply_desc ac_desc = {
107 + .properties = mxs_power_ac_props,
108 + .num_properties = ARRAY_SIZE(mxs_power_ac_props),
109 + .get_property = mxs_power_ac_get_property,
111 + .type = POWER_SUPPLY_TYPE_MAINS,
114 +static int mxs_power_probe(struct platform_device *pdev)
116 + struct device *dev = &pdev->dev;
117 + struct device_node *np = dev->of_node;
118 + struct resource *res;
119 + struct mxs_power_data *data;
120 + struct power_supply_config psy_cfg = {};
121 + void __iomem *v5ctrl_addr;
124 + dev_err(dev, "missing device tree\n");
128 + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
132 + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
133 + data->base_addr = devm_ioremap_resource(dev, res);
134 + if (IS_ERR(data->base_addr))
135 + return PTR_ERR(data->base_addr);
137 + psy_cfg.drv_data = data;
139 + data->ac = devm_power_supply_register(dev, &ac_desc, &psy_cfg);
140 + if (IS_ERR(data->ac))
141 + return PTR_ERR(data->ac);
143 + platform_set_drvdata(pdev, data);
145 + v5ctrl_addr = data->base_addr + HW_POWER_5VCTRL_OFFSET;
147 + /* Make sure the current limit of the linregs are disabled. */
148 + writel(BM_POWER_5VCTRL_ENABLE_LINREG_ILIMIT,
149 + v5ctrl_addr + STMP_OFFSET_REG_CLR);
151 + return of_platform_populate(np, NULL, NULL, dev);
154 +static struct platform_driver mxs_power_driver = {
156 + .name = "mxs_power",
157 + .of_match_table = of_mxs_power_match,
159 + .probe = mxs_power_probe,
162 +module_platform_driver(mxs_power_driver);
164 +MODULE_AUTHOR("Stefan Wahren <stefan.wahren@i2se.com>");
165 +MODULE_DESCRIPTION("Freescale MXS power subsystem");
166 +MODULE_LICENSE("GPL v2");