Merge tag 'mfd-3.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6

Pull MFD changes from Samuel Ortiz:
 "MFD bits for the 3.7 merge window.

  As usual we have a few new drivers:

   - TI LP8788
   - TI OMAP USB TLL
   - Maxim MAX8907
   - SMSC ECE1099
   - Dialog Semiconductor DA9055
   - A simpler syscon driver that allow us to get rid of the anatop one.

  Drivers are also gradually getting Device Tree and IRQ domain support.

  The following drivers got DT support:
   - palmas, 88pm860x, tc3589x and twl4030-audio

  And those ones now use the IRQ domain APIs:
   - 88pm860x, tc3589x, db8500_prcmu

  Also some other interesting changes:
   - Intel's ICH LPC now supports Lynx Point
   - TI's twl4030-audio added a GPO child
   - tps6527 enabled its backlight subdevice
   - The twl6030 pwm driver moved to the new PWM subsystem

  And finally a bunch of cleanup and casual fixes for mc13xxx, 88pm860x,
  palmas, ab8500, wm8994, wm5110, max8907 and the tps65xxx family."

Fix up various annoying conflicts: the DT and IRQ domain support came in
twice and was already in 3.6. And then it was apparently rebased.

Guys, DON'T REBASE!

* tag 'mfd-3.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (89 commits)
  ARM: dts: Enable 88pm860x pmic
  mfd: 88pm860x: Move gpadc init into touch
  mfd: 88pm860x: Device tree support
  mfd: 88pm860x: Use irqdomain
  mfd: smsc: Add support for smsc gpio io/keypad driver
  backlight: tps65217_bl: Add missing platform_set_drvdata in tps65217_bl_probe
  mfd: DA9055 core driver
  mfd: tps65910: Add alarm interrupt of TPS65910 RTC to mfd device list
  mfd: wm5110: Add register patches for revision B
  mfd: wm5110: Disable control interface error report for WM5110 rev B
  mfd: max8907: Remove regulator-compatible from DT docs
  backlight: Add TPS65217 WLED driver
  mfd: Add backlight as subdevice to the tps65217
  mfd: Provide the PRCMU with its own IRQ domain
  mfd: Fix max8907 sparse warning
  mfd: Add lp8788 mfd driver
  mfd: dbx500: Provide a more accurate smp_twd clock
  mfd: rc5t583: Fix warning messages
  regulator: palmas: Add DT support
  mfd: palmas: Change regulator defns to better suite DT
  ...

3 files changed, 194 insertions, 0 deletions

diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
index 90c5c73..d7c6b83 100644
--- a/drivers/pwm/Kconfig
+++ b/drivers/pwm/Kconfig
@@ -115,6 +115,15 @@ config  PWM_TIEHRPWM
 	  To compile this driver as a module, choose M here: the module
 	  will be called pwm-tiehrpwm.
 
+config PWM_TWL6030
+	tristate "TWL6030 PWM support"
+	depends on TWL4030_CORE
+	help
+	  Generic PWM framework driver for TWL6030.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called pwm-twl6030.
+
 config PWM_VT8500
 	tristate "vt8500 pwm support"
 	depends on ARCH_VT8500
diff --git a/drivers/pwm/Makefile b/drivers/pwm/Makefile
index e4b2c89..78f123d 100644
--- a/drivers/pwm/Makefile
+++ b/drivers/pwm/Makefile
@@ -8,4 +8,5 @@ obj-$(CONFIG_PWM_SAMSUNG)	+= pwm-samsung.o
 obj-$(CONFIG_PWM_TEGRA)		+= pwm-tegra.o
 obj-$(CONFIG_PWM_TIECAP)	+= pwm-tiecap.o
 obj-$(CONFIG_PWM_TIEHRPWM)	+= pwm-tiehrpwm.o
+obj-$(CONFIG_PWM_TWL6030)	+= pwm-twl6030.o
 obj-$(CONFIG_PWM_VT8500)	+= pwm-vt8500.o
diff --git a/drivers/pwm/pwm-twl6030.c b/drivers/pwm/pwm-twl6030.c
new file mode 100644
index 0000000..8e63878
--- /dev/null
+++ b/drivers/pwm/pwm-twl6030.c
@@ -0,0 +1,184 @@
+/*
+ * twl6030_pwm.c
+ * Driver for PHOENIX (TWL6030) Pulse Width Modulator
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Author: Hemanth V <hemanthv@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pwm.h>
+#include <linux/i2c/twl.h>
+#include <linux/slab.h>
+
+#define LED_PWM_CTRL1	0xF4
+#define LED_PWM_CTRL2	0xF5
+
+/* Max value for CTRL1 register */
+#define PWM_CTRL1_MAX	255
+
+/* Pull down disable */
+#define PWM_CTRL2_DIS_PD	(1 << 6)
+
+/* Current control 2.5 milli Amps */
+#define PWM_CTRL2_CURR_02	(2 << 4)
+
+/* LED supply source */
+#define PWM_CTRL2_SRC_VAC	(1 << 2)
+
+/* LED modes */
+#define PWM_CTRL2_MODE_HW	(0 << 0)
+#define PWM_CTRL2_MODE_SW	(1 << 0)
+#define PWM_CTRL2_MODE_DIS	(2 << 0)
+
+#define PWM_CTRL2_MODE_MASK	0x3
+
+struct twl6030_pwm_chip {
+	struct pwm_chip chip;
+};
+
+static int twl6030_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
+{
+	int ret;
+	u8 val;
+
+	/* Configure PWM */
+	val = PWM_CTRL2_DIS_PD | PWM_CTRL2_CURR_02 | PWM_CTRL2_SRC_VAC |
+	      PWM_CTRL2_MODE_HW;
+
+	ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, val, LED_PWM_CTRL2);
+	if (ret < 0) {
+		dev_err(chip->dev, "%s: Failed to configure PWM, Error %d\n",
+			pwm->label, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int twl6030_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
+			      int duty_ns, int period_ns)
+{
+	u8 duty_cycle = (duty_ns * PWM_CTRL1_MAX) / period_ns;
+	int ret;
+
+	ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, duty_cycle, LED_PWM_CTRL1);
+	if (ret < 0) {
+		pr_err("%s: Failed to configure PWM, Error %d\n",
+			pwm->label, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int twl6030_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
+{
+	int ret;
+	u8 val;
+
+	ret = twl_i2c_read_u8(TWL6030_MODULE_ID1, &val, LED_PWM_CTRL2);
+	if (ret < 0) {
+		dev_err(chip->dev, "%s: Failed to enable PWM, Error %d\n",
+			pwm->label, ret);
+		return ret;
+	}
+
+	/* Change mode to software control */
+	val &= ~PWM_CTRL2_MODE_MASK;
+	val |= PWM_CTRL2_MODE_SW;
+
+	ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, val, LED_PWM_CTRL2);
+	if (ret < 0) {
+		dev_err(chip->dev, "%s: Failed to enable PWM, Error %d\n",
+			pwm->label, ret);
+		return ret;
+	}
+
+	twl_i2c_read_u8(TWL6030_MODULE_ID1, &val, LED_PWM_CTRL2);
+	return 0;
+}
+
+static void twl6030_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
+{
+	int ret;
+	u8 val;
+
+	ret = twl_i2c_read_u8(TWL6030_MODULE_ID1, &val, LED_PWM_CTRL2);
+	if (ret < 0) {
+		dev_err(chip->dev, "%s: Failed to disable PWM, Error %d\n",
+			pwm->label, ret);
+		return;
+	}
+
+	val &= ~PWM_CTRL2_MODE_MASK;
+	val |= PWM_CTRL2_MODE_HW;
+
+	ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, val, LED_PWM_CTRL2);
+	if (ret < 0) {
+		dev_err(chip->dev, "%s: Failed to disable PWM, Error %d\n",
+			pwm->label, ret);
+	}
+}
+
+static const struct pwm_ops twl6030_pwm_ops = {
+	.request = twl6030_pwm_request,
+	.config = twl6030_pwm_config,
+	.enable = twl6030_pwm_enable,
+	.disable = twl6030_pwm_disable,
+};
+
+static int twl6030_pwm_probe(struct platform_device *pdev)
+{
+	struct twl6030_pwm_chip *twl6030;
+	int ret;
+
+	twl6030 = devm_kzalloc(&pdev->dev, sizeof(*twl6030), GFP_KERNEL);
+	if (!twl6030)
+		return -ENOMEM;
+
+	twl6030->chip.dev = &pdev->dev;
+	twl6030->chip.ops = &twl6030_pwm_ops;
+	twl6030->chip.base = -1;
+	twl6030->chip.npwm = 1;
+
+	ret = pwmchip_add(&twl6030->chip);
+	if (ret < 0)
+		return ret;
+
+	platform_set_drvdata(pdev, twl6030);
+
+	return 0;
+}
+
+static int twl6030_pwm_remove(struct platform_device *pdev)
+{
+	struct twl6030_pwm_chip *twl6030 = platform_get_drvdata(pdev);
+
+	return pwmchip_remove(&twl6030->chip);
+}
+
+static struct platform_driver twl6030_pwm_driver = {
+	.driver = {
+		.name = "twl6030-pwm",
+	},
+	.probe = twl6030_pwm_probe,
+	.remove = __devexit_p(twl6030_pwm_remove),
+};
+module_platform_driver(twl6030_pwm_driver);
+
+MODULE_ALIAS("platform:twl6030-pwm");
+MODULE_LICENSE("GPL");