mfd: Add Toshiba's TC35892 MFD core

The TC35892 I/O Expander provides 24 GPIOs, a keypad controller, timers,
and a rotator wheel interface.  This patch adds the MFD core.

Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 132 insertions, 0 deletions

diff --git a/include/linux/mfd/tc35892.h b/include/linux/mfd/tc35892.h
new file mode 100644
index 000000000000..e47f770d3068
--- /dev/null
+++ b/include/linux/mfd/tc35892.h
@@ -0,0 +1,132 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License Terms: GNU General Public License, version 2
+ */
+
+#ifndef __LINUX_MFD_TC35892_H
+#define __LINUX_MFD_TC35892_H
+
+#include <linux/device.h>
+
+#define TC35892_RSTCTRL_IRQRST  (1 << 4)
+#define TC35892_RSTCTRL_TIMRST  (1 << 3)
+#define TC35892_RSTCTRL_ROTRST  (1 << 2)
+#define TC35892_RSTCTRL_KBDRST  (1 << 1)
+#define TC35892_RSTCTRL_GPIRST  (1 << 0)
+
+#define TC35892_IRQST           0x91
+
+#define TC35892_MANFCODE_MAGIC  0x03
+#define TC35892_MANFCODE        0x80
+#define TC35892_VERSION         0x81
+#define TC35892_IOCFG           0xA7
+
+#define TC35892_CLKMODE         0x88
+#define TC35892_CLKCFG          0x89
+#define TC35892_CLKEN           0x8A
+
+#define TC35892_RSTCTRL         0x82
+#define TC35892_EXTRSTN         0x83
+#define TC35892_RSTINTCLR       0x84
+
+#define TC35892_GPIOIS0         0xC9
+#define TC35892_GPIOIS1         0xCA
+#define TC35892_GPIOIS2         0xCB
+#define TC35892_GPIOIBE0        0xCC
+#define TC35892_GPIOIBE1        0xCD
+#define TC35892_GPIOIBE2        0xCE
+#define TC35892_GPIOIEV0        0xCF
+#define TC35892_GPIOIEV1        0xD0
+#define TC35892_GPIOIEV2        0xD1
+#define TC35892_GPIOIE0         0xD2
+#define TC35892_GPIOIE1         0xD3
+#define TC35892_GPIOIE2         0xD4
+#define TC35892_GPIORIS0        0xD6
+#define TC35892_GPIORIS1        0xD7
+#define TC35892_GPIORIS2        0xD8
+#define TC35892_GPIOMIS0        0xD9
+#define TC35892_GPIOMIS1        0xDA
+#define TC35892_GPIOMIS2        0xDB
+#define TC35892_GPIOIC0         0xDC
+#define TC35892_GPIOIC1         0xDD
+#define TC35892_GPIOIC2         0xDE
+
+#define TC35892_GPIODATA0       0xC0
+#define TC35892_GPIOMASK0       0xc1
+#define TC35892_GPIODATA1       0xC2
+#define TC35892_GPIOMASK1       0xc3
+#define TC35892_GPIODATA2       0xC4
+#define TC35892_GPIOMASK2       0xC5
+
+#define TC35892_GPIODIR0        0xC6
+#define TC35892_GPIODIR1        0xC7
+#define TC35892_GPIODIR2        0xC8
+
+#define TC35892_GPIOSYNC0       0xE6
+#define TC35892_GPIOSYNC1       0xE7
+#define TC35892_GPIOSYNC2       0xE8
+
+#define TC35892_GPIOWAKE0       0xE9
+#define TC35892_GPIOWAKE1       0xEA
+#define TC35892_GPIOWAKE2       0xEB
+
+#define TC35892_GPIOODM0        0xE0
+#define TC35892_GPIOODE0        0xE1
+#define TC35892_GPIOODM1        0xE2
+#define TC35892_GPIOODE1        0xE3
+#define TC35892_GPIOODM2        0xE4
+#define TC35892_GPIOODE2        0xE5
+
+#define TC35892_INT_GPIIRQ      0
+#define TC35892_INT_TI0IRQ      1
+#define TC35892_INT_TI1IRQ      2
+#define TC35892_INT_TI2IRQ      3
+#define TC35892_INT_ROTIRQ      5
+#define TC35892_INT_KBDIRQ      6
+#define TC35892_INT_PORIRQ      7
+
+#define TC35892_NR_INTERNAL_IRQS        8
+#define TC35892_INT_GPIO(x)     (TC35892_NR_INTERNAL_IRQS + (x))
+
+struct tc35892 {
+        struct mutex lock;
+        struct device *dev;
+        struct i2c_client *i2c;
+
+        int irq_base;
+        int num_gpio;
+        struct tc35892_platform_data *pdata;
+};
+
+extern int tc35892_reg_write(struct tc35892 *tc35892, u8 reg, u8 data);
+extern int tc35892_reg_read(struct tc35892 *tc35892, u8 reg);
+extern int tc35892_block_read(struct tc35892 *tc35892, u8 reg, u8 length,
+                              u8 *values);
+extern int tc35892_block_write(struct tc35892 *tc35892, u8 reg, u8 length,
+                               const u8 *values);
+extern int tc35892_set_bits(struct tc35892 *tc35892, u8 reg, u8 mask, u8 val);
+
+/**
+ * struct tc35892_gpio_platform_data - TC35892 GPIO platform data
+ * @gpio_base: first gpio number assigned to TC35892.  A maximum of
+ *             %TC35892_NR_GPIOS GPIOs will be allocated.
+ */
+struct tc35892_gpio_platform_data {
+        int gpio_base;
+};
+
+/**
+ * struct tc35892_platform_data - TC35892 platform data
+ * @irq_base: base IRQ number.  %TC35892_NR_IRQS irqs will be used.
+ * @gpio: GPIO-specific platform data
+ */
+struct tc35892_platform_data {
+        int irq_base;
+        struct tc35892_gpio_platform_data *gpio;
+};
+
+#define TC35892_NR_GPIOS        24
+#define TC35892_NR_IRQS         TC35892_INT_GPIO(TC35892_NR_GPIOS)
+
+#endif