mfd: PCF50633 gpio support

What the PCF05633 calls as a 'GPIO' is much more than the GPIO in the linux
sense and there are only 4 of them - which means, the gpiolib is not used
here.

Signed-off-by: Balaji Rao <balajirrao@openmoko.org>
Cc: Andy Green <andy@openmoko.com>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>

3 files changed, 127 insertions, 1 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 2fa3504..06a2b0f 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -233,6 +233,13 @@ config PCF50633_ADC
 	 Say yes here if you want to include support for ADC in the
 	 NXP PCF50633 chip.
 
+config PCF50633_GPIO
+	tristate "Support for NXP PCF50633 GPIO"
+	depends on MFD_PCF50633
+	help
+	 Say yes here if you want to include support GPIO for pins on
+	 the PCF50633 chip.
+
 endmenu
 
 menu "Multimedia Capabilities Port drivers"
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 138f9c4..3afb519 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -39,4 +39,5 @@ obj-$(CONFIG_UCB1400_CORE)	+= ucb1400_core.o
 obj-$(CONFIG_PMIC_DA903X)	+= da903x.o
 
 obj-$(CONFIG_MFD_PCF50633)	+= pcf50633-core.o
-obj-$(CONFIG_PCF50633_ADC)	+= pcf50633-adc.o
\ No newline at end of file
+obj-$(CONFIG_PCF50633_ADC)	+= pcf50633-adc.o
+obj-$(CONFIG_PCF50633_GPIO)	+= pcf50633-gpio.o
\ No newline at end of file
diff --git a/drivers/mfd/pcf50633-gpio.c b/drivers/mfd/pcf50633-gpio.c
new file mode 100644
index 0000000..2fa2eca
--- /dev/null
+++ b/drivers/mfd/pcf50633-gpio.c
@@ -0,0 +1,118 @@
+/* NXP PCF50633 GPIO Driver
+ *
+ * (C) 2006-2008 by Openmoko, Inc.
+ * Author: Balaji Rao <balajirrao@openmoko.org>
+ * All rights reserved.
+ *
+ * Broken down from monstrous PCF50633 driver mainly by
+ * Harald Welte, Andy Green and Werner Almesberger
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ */
+
+#include <linux/kernel.h>
+
+#include <linux/mfd/pcf50633/core.h>
+#include <linux/mfd/pcf50633/gpio.h>
+
+enum pcf50633_regulator_id {
+	PCF50633_REGULATOR_AUTO,
+	PCF50633_REGULATOR_DOWN1,
+	PCF50633_REGULATOR_DOWN2,
+	PCF50633_REGULATOR_LDO1,
+	PCF50633_REGULATOR_LDO2,
+	PCF50633_REGULATOR_LDO3,
+	PCF50633_REGULATOR_LDO4,
+	PCF50633_REGULATOR_LDO5,
+	PCF50633_REGULATOR_LDO6,
+	PCF50633_REGULATOR_HCLDO,
+	PCF50633_REGULATOR_MEMLDO,
+};
+
+#define PCF50633_REG_AUTOOUT	0x1a
+#define PCF50633_REG_DOWN1OUT	0x1e
+#define PCF50633_REG_DOWN2OUT	0x22
+#define PCF50633_REG_MEMLDOOUT	0x26
+#define PCF50633_REG_LDO1OUT	0x2d
+#define PCF50633_REG_LDO2OUT	0x2f
+#define PCF50633_REG_LDO3OUT	0x31
+#define PCF50633_REG_LDO4OUT	0x33
+#define PCF50633_REG_LDO5OUT	0x35
+#define PCF50633_REG_LDO6OUT	0x37
+#define PCF50633_REG_HCLDOOUT	0x39
+
+static const u8 pcf50633_regulator_registers[PCF50633_NUM_REGULATORS] = {
+	[PCF50633_REGULATOR_AUTO]	= PCF50633_REG_AUTOOUT,
+	[PCF50633_REGULATOR_DOWN1]	= PCF50633_REG_DOWN1OUT,
+	[PCF50633_REGULATOR_DOWN2]	= PCF50633_REG_DOWN2OUT,
+	[PCF50633_REGULATOR_MEMLDO]	= PCF50633_REG_MEMLDOOUT,
+	[PCF50633_REGULATOR_LDO1]	= PCF50633_REG_LDO1OUT,
+	[PCF50633_REGULATOR_LDO2]	= PCF50633_REG_LDO2OUT,
+	[PCF50633_REGULATOR_LDO3]	= PCF50633_REG_LDO3OUT,
+	[PCF50633_REGULATOR_LDO4]	= PCF50633_REG_LDO4OUT,
+	[PCF50633_REGULATOR_LDO5]	= PCF50633_REG_LDO5OUT,
+	[PCF50633_REGULATOR_LDO6]	= PCF50633_REG_LDO6OUT,
+	[PCF50633_REGULATOR_HCLDO]	= PCF50633_REG_HCLDOOUT,
+};
+
+int pcf50633_gpio_set(struct pcf50633 *pcf, int gpio, u8 val)
+{
+	u8 reg;
+
+	reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
+
+	return pcf50633_reg_set_bit_mask(pcf, reg, 0x07, val);
+}
+EXPORT_SYMBOL_GPL(pcf50633_gpio_set);
+
+u8 pcf50633_gpio_get(struct pcf50633 *pcf, int gpio)
+{
+	u8 reg, val;
+
+	reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
+	val = pcf50633_reg_read(pcf, reg) & 0x07;
+
+	return val;
+}
+EXPORT_SYMBOL_GPL(pcf50633_gpio_get);
+
+int pcf50633_gpio_invert_set(struct pcf50633 *pcf, int gpio, int invert)
+{
+	u8 val, reg;
+
+	reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
+	val = !!invert << 3;
+
+	return pcf50633_reg_set_bit_mask(pcf, reg, 1 << 3, val);
+}
+EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_set);
+
+int pcf50633_gpio_invert_get(struct pcf50633 *pcf, int gpio)
+{
+	u8 reg, val;
+
+	reg = gpio - PCF50633_GPIO1 + PCF50633_REG_GPIO1CFG;
+	val = pcf50633_reg_read(pcf, reg);
+
+	return val & (1 << 3);
+}
+EXPORT_SYMBOL_GPL(pcf50633_gpio_invert_get);
+
+int pcf50633_gpio_power_supply_set(struct pcf50633 *pcf,
+					int gpio, int regulator, int on)
+{
+	u8 reg, val, mask;
+
+	/* the *ENA register is always one after the *OUT register */
+	reg = pcf50633_regulator_registers[regulator] + 1;
+
+	val = !!on << (gpio - PCF50633_GPIO1);
+	mask = 1 << (gpio - PCF50633_GPIO1);
+
+	return pcf50633_reg_set_bit_mask(pcf, reg, mask, val);
+}
+EXPORT_SYMBOL_GPL(pcf50633_gpio_power_supply_set);