mfd: Add STMPE I/O Expander support
Add support for the STMPE family of I/O Expanders from
STMicroelectronics. These devices include upto 24 gpios and a varying
selection of blocks, including PWM, keypad, and touchscreen controllers.
This patch adds the MFD core.
[l.fu@pengutronix.de: fix stmpe811 enable hook]
[l.fu@pengutronix.de: add touchscreen platform data]
Acked-by: Luotao Fu <l.fu@pengutronix.de>
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>
diff --git a/drivers/mfd/stmpe.h b/drivers/mfd/stmpe.h
new file mode 100644
index 0000000..991f0ec
--- /dev/null
+++ b/drivers/mfd/stmpe.h
@@ -0,0 +1,176 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License Terms: GNU General Public License, version 2
+ * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
+ */
+
+#ifndef __STMPE_H
+#define __STMPE_H
+
+#ifdef STMPE_DUMP_BYTES
+static inline void stmpe_dump_bytes(const char *str, const void *buf,
+ size_t len)
+{
+ print_hex_dump_bytes(str, DUMP_PREFIX_OFFSET, buf, len);
+}
+#else
+static inline void stmpe_dump_bytes(const char *str, const void *buf,
+ size_t len)
+{
+}
+#endif
+
+/**
+ * struct stmpe_variant_block - information about block
+ * @cell: base mfd cell
+ * @irq: interrupt number to be added to each IORESOURCE_IRQ
+ * in the cell
+ * @block: block id; used for identification with platform data and for
+ * enable and altfunc callbacks
+ */
+struct stmpe_variant_block {
+ struct mfd_cell *cell;
+ int irq;
+ enum stmpe_block block;
+};
+
+/**
+ * struct stmpe_variant_info - variant-specific information
+ * @name: part name
+ * @id_val: content of CHIPID register
+ * @id_mask: bits valid in CHIPID register for comparison with id_val
+ * @num_gpios: number of GPIOS
+ * @af_bits: number of bits used to specify the alternate function
+ * @blocks: list of blocks present on this device
+ * @num_blocks: number of blocks present on this device
+ * @num_irqs: number of internal IRQs available on this device
+ * @enable: callback to enable the specified blocks.
+ * Called with the I/O lock held.
+ * @get_altfunc: callback to get the alternate function number for the
+ * specific block
+ */
+struct stmpe_variant_info {
+ const char *name;
+ u16 id_val;
+ u16 id_mask;
+ int num_gpios;
+ int af_bits;
+ const u8 *regs;
+ struct stmpe_variant_block *blocks;
+ int num_blocks;
+ int num_irqs;
+ int (*enable)(struct stmpe *stmpe, unsigned int blocks, bool enable);
+ int (*get_altfunc)(struct stmpe *stmpe, enum stmpe_block block);
+};
+
+#define STMPE_ICR_LSB_HIGH (1 << 2)
+#define STMPE_ICR_LSB_EDGE (1 << 1)
+#define STMPE_ICR_LSB_GIM (1 << 0)
+
+/*
+ * STMPE811
+ */
+
+#define STMPE811_IRQ_TOUCH_DET 0
+#define STMPE811_IRQ_FIFO_TH 1
+#define STMPE811_IRQ_FIFO_OFLOW 2
+#define STMPE811_IRQ_FIFO_FULL 3
+#define STMPE811_IRQ_FIFO_EMPTY 4
+#define STMPE811_IRQ_TEMP_SENS 5
+#define STMPE811_IRQ_ADC 6
+#define STMPE811_IRQ_GPIOC 7
+#define STMPE811_NR_INTERNAL_IRQS 8
+
+#define STMPE811_REG_CHIP_ID 0x00
+#define STMPE811_REG_SYS_CTRL2 0x04
+#define STMPE811_REG_INT_CTRL 0x09
+#define STMPE811_REG_INT_EN 0x0A
+#define STMPE811_REG_INT_STA 0x0B
+#define STMPE811_REG_GPIO_INT_EN 0x0C
+#define STMPE811_REG_GPIO_INT_STA 0x0D
+#define STMPE811_REG_GPIO_SET_PIN 0x10
+#define STMPE811_REG_GPIO_CLR_PIN 0x11
+#define STMPE811_REG_GPIO_MP_STA 0x12
+#define STMPE811_REG_GPIO_DIR 0x13
+#define STMPE811_REG_GPIO_ED 0x14
+#define STMPE811_REG_GPIO_RE 0x15
+#define STMPE811_REG_GPIO_FE 0x16
+#define STMPE811_REG_GPIO_AF 0x17
+
+#define STMPE811_SYS_CTRL2_ADC_OFF (1 << 0)
+#define STMPE811_SYS_CTRL2_TSC_OFF (1 << 1)
+#define STMPE811_SYS_CTRL2_GPIO_OFF (1 << 2)
+#define STMPE811_SYS_CTRL2_TS_OFF (1 << 3)
+
+/*
+ * STMPE1601
+ */
+
+#define STMPE1601_IRQ_GPIOC 8
+#define STMPE1601_IRQ_PWM3 7
+#define STMPE1601_IRQ_PWM2 6
+#define STMPE1601_IRQ_PWM1 5
+#define STMPE1601_IRQ_PWM0 4
+#define STMPE1601_IRQ_KEYPAD_OVER 2
+#define STMPE1601_IRQ_KEYPAD 1
+#define STMPE1601_IRQ_WAKEUP 0
+#define STMPE1601_NR_INTERNAL_IRQS 9
+
+#define STMPE1601_REG_SYS_CTRL 0x02
+#define STMPE1601_REG_ICR_LSB 0x11
+#define STMPE1601_REG_IER_LSB 0x13
+#define STMPE1601_REG_ISR_MSB 0x14
+#define STMPE1601_REG_CHIP_ID 0x80
+#define STMPE1601_REG_INT_EN_GPIO_MASK_LSB 0x17
+#define STMPE1601_REG_INT_STA_GPIO_MSB 0x18
+#define STMPE1601_REG_GPIO_MP_LSB 0x87
+#define STMPE1601_REG_GPIO_SET_LSB 0x83
+#define STMPE1601_REG_GPIO_CLR_LSB 0x85
+#define STMPE1601_REG_GPIO_SET_DIR_LSB 0x89
+#define STMPE1601_REG_GPIO_ED_MSB 0x8A
+#define STMPE1601_REG_GPIO_RE_LSB 0x8D
+#define STMPE1601_REG_GPIO_FE_LSB 0x8F
+#define STMPE1601_REG_GPIO_AF_U_MSB 0x92
+
+#define STMPE1601_SYS_CTRL_ENABLE_GPIO (1 << 3)
+#define STMPE1601_SYS_CTRL_ENABLE_KPC (1 << 1)
+#define STMPE1601_SYSCON_ENABLE_SPWM (1 << 0)
+
+/*
+ * STMPE24xx
+ */
+
+#define STMPE24XX_IRQ_GPIOC 8
+#define STMPE24XX_IRQ_PWM2 7
+#define STMPE24XX_IRQ_PWM1 6
+#define STMPE24XX_IRQ_PWM0 5
+#define STMPE24XX_IRQ_ROT_OVER 4
+#define STMPE24XX_IRQ_ROT 3
+#define STMPE24XX_IRQ_KEYPAD_OVER 2
+#define STMPE24XX_IRQ_KEYPAD 1
+#define STMPE24XX_IRQ_WAKEUP 0
+#define STMPE24XX_NR_INTERNAL_IRQS 9
+
+#define STMPE24XX_REG_SYS_CTRL 0x02
+#define STMPE24XX_REG_ICR_LSB 0x11
+#define STMPE24XX_REG_IER_LSB 0x13
+#define STMPE24XX_REG_ISR_MSB 0x14
+#define STMPE24XX_REG_CHIP_ID 0x80
+#define STMPE24XX_REG_IEGPIOR_LSB 0x18
+#define STMPE24XX_REG_ISGPIOR_MSB 0x19
+#define STMPE24XX_REG_GPMR_LSB 0xA5
+#define STMPE24XX_REG_GPSR_LSB 0x85
+#define STMPE24XX_REG_GPCR_LSB 0x88
+#define STMPE24XX_REG_GPDR_LSB 0x8B
+#define STMPE24XX_REG_GPEDR_MSB 0x8C
+#define STMPE24XX_REG_GPRER_LSB 0x91
+#define STMPE24XX_REG_GPFER_LSB 0x94
+#define STMPE24XX_REG_GPAFR_U_MSB 0x9B
+
+#define STMPE24XX_SYS_CTRL_ENABLE_GPIO (1 << 3)
+#define STMPE24XX_SYSCON_ENABLE_PWM (1 << 2)
+#define STMPE24XX_SYS_CTRL_ENABLE_KPC (1 << 1)
+#define STMPE24XX_SYSCON_ENABLE_ROT (1 << 0)
+
+#endif