mxs: forward-port regulator patches into 4.4

[openwrt/svn-archive/archive.git] / target / linux / mxs / patches-4.4 / 101-mxs-add-mxs_power.patch

diff --git a/target/linux/mxs/patches-4.4/101-mxs-add-mxs_power.patch b/target/linux/mxs/patches-4.4/101-mxs-add-mxs_power.patch
new file mode 100644 (file)
index 0000000..104736c
--- /dev/null
+++ b/target/linux/mxs/patches-4.4/101-mxs-add-mxs_power.patch
@@ -0,0 +1,166 @@
+--- 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
+--- a/drivers/power/Makefile
++++ b/drivers/power/Makefile
+@@ -10,6 +10,7 @@ obj-$(CONFIG_GENERIC_ADC_BATTERY)    += gen
+ obj-$(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
+--- /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");