[PATCH v2 5/9] mfd: add TI LMU driver

2015-11-25 Thread Milo Kim 
TI LMU (Lighting Management Unit) driver supports lighting devices below.

  LM3532, LM3631, LM3632, LM3633, LM3695 and LM3697.

LMU devices have common features.
  - I2C interface for accessing device registers
  - Hardware enable pin control
  - Backlight brightness control
  - Notifier for hardware fault monitoring
  - Regulators for LCD display bias

It contains fault monitor, backlight, LED and regulator driver.

LMU fault monitor
-
  LM3633 and LM3697 provide hardware monitoring feature.
  It enables open or short circuit detection.
  After monitoring is done, each device should be re-initialized.
  Notifier is used for this case.
  Please refer to separate patch for 'ti-lmu-fault-monitor'.

Backlight
-
  It's handled by TI LMU backlight consolidated driver and
  chip dependent data. Please refer to separate patches for
  'ti-lmu-backlight'.

LED indicator
-
  LM3633 has 6 indicator LEDs. Programmable dimming pattern is also
  supported. Please refer to separate patch for 'leds-lm3633'.

Regulator
-
  LM3631 has 5 regulators for the display bias.
  LM3632 supports 3 regulators. One consolidated driver enables it.
  Please refer to separate patch for 'lm363x-regulator'.

Cc: Lee Jones  
Cc: Jacek Anaszewski 
Cc: Mark Brown 
Cc: Rob Herring 
Cc: devicet...@vger.kernel.org
Cc: linux-l...@vger.kernel.org 
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Milo Kim 
---
 drivers/mfd/Kconfig |  12 ++
 drivers/mfd/Makefile|   2 +
 drivers/mfd/ti-lmu.c| 259 +
 include/linux/mfd/ti-lmu-register.h | 280 
 include/linux/mfd/ti-lmu.h  |  87 +++
 5 files changed, 640 insertions(+)
 create mode 100644 drivers/mfd/ti-lmu.c
 create mode 100644 include/linux/mfd/ti-lmu-register.h
 create mode 100644 include/linux/mfd/ti-lmu.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 4d92df6..a6aab27 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1049,6 +1049,18 @@ config MFD_LP8788
  TI LP8788 PMU supports regulators, battery charger, RTC,
  ADC, backlight driver and current sinks.
 
+config MFD_TI_LMU
+   tristate "TI Lighting Management Unit driver"
+   depends on I2C
+   select MFD_CORE
+   select REGMAP_I2C
+   help
+ Say yes here to enable support for TI LMU chips.
+
+ TI LMU MFD supports LM3532, LM3631, LM3632, LM3633, LM3695 and LM3697.
+ It consists of backlight, LED and regulator driver.
+ It provides consistent device controls for lighting functions.
+
 config MFD_OMAP_USB_HOST
bool "TI OMAP USBHS core and TLL driver"
depends on USB_EHCI_HCD_OMAP || USB_OHCI_HCD_OMAP3
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index a8b76b8..10e4bc2 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -111,6 +111,8 @@ obj-$(CONFIG_MFD_AXP20X)+= axp20x.o
 obj-$(CONFIG_MFD_LP3943)   += lp3943.o
 obj-$(CONFIG_MFD_LP8788)   += lp8788.o lp8788-irq.o
 
+obj-$(CONFIG_MFD_TI_LMU)   += ti-lmu.o
+
 da9055-objs:= da9055-core.o da9055-i2c.o
 obj-$(CONFIG_MFD_DA9055)   += da9055.o
 obj-$(CONFIG_MFD_DA9062)   += da9062-core.o
diff --git a/drivers/mfd/ti-lmu.c b/drivers/mfd/ti-lmu.c
new file mode 100644
index 000..aeb1e7d
--- /dev/null
+++ b/drivers/mfd/ti-lmu.c
@@ -0,0 +1,259 @@
+/*
+ * TI LMU (Lighting Management Unit) Core Driver
+ *
+ * Copyright 2015 Texas Instruments
+ *
+ * Author: Milo Kim 
+ *
+ * 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.
+ */
+
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+
+struct ti_lmu_data {
+   struct mfd_cell *cells;
+   int num_cells;
+   unsigned int max_register;
+};
+
+static int ti_lmu_enable_hw(struct ti_lmu *lmu, enum ti_lmu_id id)
+{
+   int ret;
+
+   if (gpio_is_valid(lmu->en_gpio)) {
+   ret = devm_gpio_request_one(lmu->dev, lmu->en_gpio,
+   GPIOF_OUT_INIT_HIGH, "lmu_hwen");
+   if (ret) {
+   dev_err(lmu->dev, "Can not request enable GPIO: %d\n",
+   ret);
+   return ret;
+   }
+   }
+
+   /* Delay about 1ms after HW enable pin control */
+   usleep_range(1000, 1500);
+
+   /* LM3631 has additional power up sequence - enable LCD_EN bit. */
+   if (id == LM3631) {
+   return regmap_update_bits(lmu->regmap, LM3631_REG_DEVCTRL,
+ LM3631_LCD_EN_MASK,
+ LM3631_LCD_EN_MASK);
+   }
+
+   return 0;
+}
+
+static void ti_lmu_disable_hw(struct

[PATCH v2 5/9] mfd: add TI LMU driver

2015-11-25 Thread Milo Kim 
TI LMU (Lighting Management Unit) driver supports lighting devices below.

  LM3532, LM3631, LM3632, LM3633, LM3695 and LM3697.

LMU devices have common features.
  - I2C interface for accessing device registers
  - Hardware enable pin control
  - Backlight brightness control
  - Notifier for hardware fault monitoring
  - Regulators for LCD display bias

It contains fault monitor, backlight, LED and regulator driver.

LMU fault monitor
-
  LM3633 and LM3697 provide hardware monitoring feature.
  It enables open or short circuit detection.
  After monitoring is done, each device should be re-initialized.
  Notifier is used for this case.
  Please refer to separate patch for 'ti-lmu-fault-monitor'.

Backlight
-
  It's handled by TI LMU backlight consolidated driver and
  chip dependent data. Please refer to separate patches for
  'ti-lmu-backlight'.

LED indicator
-
  LM3633 has 6 indicator LEDs. Programmable dimming pattern is also
  supported. Please refer to separate patch for 'leds-lm3633'.

Regulator
-
  LM3631 has 5 regulators for the display bias.
  LM3632 supports 3 regulators. One consolidated driver enables it.
  Please refer to separate patch for 'lm363x-regulator'.

Cc: Lee Jones  
Cc: Jacek Anaszewski 
Cc: Mark Brown 
Cc: Rob Herring 
Cc: devicet...@vger.kernel.org
Cc: linux-l...@vger.kernel.org 
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Milo Kim 
---
 drivers/mfd/Kconfig |  12 ++
 drivers/mfd/Makefile|   2 +
 drivers/mfd/ti-lmu.c| 259 +
 include/linux/mfd/ti-lmu-register.h | 280 
 include/linux/mfd/ti-lmu.h  |  87 +++
 5 files changed, 640 insertions(+)
 create mode 100644 drivers/mfd/ti-lmu.c
 create mode 100644 include/linux/mfd/ti-lmu-register.h
 create mode 100644 include/linux/mfd/ti-lmu.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 4d92df6..a6aab27 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1049,6 +1049,18 @@ config MFD_LP8788
  TI LP8788 PMU supports regulators, battery charger, RTC,
  ADC, backlight driver and current sinks.
 
+config MFD_TI_LMU
+   tristate "TI Lighting Management Unit driver"
+   depends on I2C
+   select MFD_CORE
+   select REGMAP_I2C
+   help
+ Say yes here to enable support for TI LMU chips.
+
+ TI LMU MFD supports LM3532, LM3631, LM3632, LM3633, LM3695 and LM3697.
+ It consists of backlight, LED and regulator driver.
+ It provides consistent device controls for lighting functions.
+
 config MFD_OMAP_USB_HOST
bool "TI OMAP USBHS core and TLL driver"
depends on USB_EHCI_HCD_OMAP || USB_OHCI_HCD_OMAP3
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index a8b76b8..10e4bc2 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -111,6 +111,8 @@ obj-$(CONFIG_MFD_AXP20X)+= axp20x.o
 obj-$(CONFIG_MFD_LP3943)   += lp3943.o
 obj-$(CONFIG_MFD_LP8788)   += lp8788.o lp8788-irq.o
 
+obj-$(CONFIG_MFD_TI_LMU)   += ti-lmu.o
+
 da9055-objs:= da9055-core.o da9055-i2c.o
 obj-$(CONFIG_MFD_DA9055)   += da9055.o
 obj-$(CONFIG_MFD_DA9062)   += da9062-core.o
diff --git a/drivers/mfd/ti-lmu.c b/drivers/mfd/ti-lmu.c
new file mode 100644
index 000..aeb1e7d
--- /dev/null
+++ b/drivers/mfd/ti-lmu.c
@@ -0,0 +1,259 @@
+/*
+ * TI LMU (Lighting Management Unit) Core Driver
+ *
+ * Copyright 2015 Texas Instruments
+ *
+ * Author: Milo Kim 
+ *
+ * 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.
+ */
+
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+
+struct ti_lmu_data {
+   struct mfd_cell *cells;
+   int num_cells;
+   unsigned int max_register;
+};
+
+static int ti_lmu_enable_hw(struct ti_lmu *lmu, enum ti_lmu_id id)
+{
+   int ret;
+
+   if (gpio_is_valid(lmu->en_gpio)) {
+   ret = devm_gpio_request_one(lmu->dev, lmu->en_gpio,
+   GPIOF_OUT_INIT_HIGH, "lmu_hwen");
+   if (ret) {
+   dev_err(lmu->dev, "Can not request enable GPIO: %d\n",
+   ret);
+   return ret;
+   }
+   }
+
+   /* Delay about 1ms after HW enable pin control */
+   usleep_range(1000, 1500);
+
+   /* LM3631 has additional power up sequence - enable LCD_EN bit. */
+   if (id == LM3631) {
+   return regmap_update_bits(lmu->regmap, LM3631_REG_DEVCTRL,
+ LM3631_LCD_EN_MASK,
+