6377cfa3b8
This prepares the MFD for the STMPE ADC driver. This commit introduces devicetree settings that are used by the ADC and adds an init function. Common ADC settings that are shared with the touchscreen driver can now reside in the overlying MFD. Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com> Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
164 lines
4 KiB
C
164 lines
4 KiB
C
/*
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* Copyright (C) ST-Ericsson SA 2010
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*
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* License Terms: GNU General Public License, version 2
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* Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
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*/
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#ifndef __LINUX_MFD_STMPE_H
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#define __LINUX_MFD_STMPE_H
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#include <linux/mutex.h>
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#define STMPE_SAMPLE_TIME(x) ((x & 0xf) << 4)
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#define STMPE_MOD_12B(x) ((x & 0x1) << 3)
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#define STMPE_REF_SEL(x) ((x & 0x1) << 1)
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#define STMPE_ADC_FREQ(x) (x & 0x3)
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#define STMPE_AVE_CTRL(x) ((x & 0x3) << 6)
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#define STMPE_DET_DELAY(x) ((x & 0x7) << 3)
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#define STMPE_SETTLING(x) (x & 0x7)
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#define STMPE_FRACTION_Z(x) (x & 0x7)
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#define STMPE_I_DRIVE(x) (x & 0x1)
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#define STMPE_OP_MODE(x) ((x & 0x7) << 1)
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#define STMPE811_REG_ADC_CTRL1 0x20
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#define STMPE811_REG_ADC_CTRL2 0x21
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struct device;
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struct regulator;
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enum stmpe_block {
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STMPE_BLOCK_GPIO = 1 << 0,
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STMPE_BLOCK_KEYPAD = 1 << 1,
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STMPE_BLOCK_TOUCHSCREEN = 1 << 2,
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STMPE_BLOCK_ADC = 1 << 3,
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STMPE_BLOCK_PWM = 1 << 4,
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STMPE_BLOCK_ROTATOR = 1 << 5,
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};
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enum stmpe_partnum {
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STMPE610,
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STMPE801,
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STMPE811,
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STMPE1600,
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STMPE1601,
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STMPE1801,
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STMPE2401,
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STMPE2403,
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STMPE_NBR_PARTS
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};
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/*
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* For registers whose locations differ on variants, the correct address is
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* obtained by indexing stmpe->regs with one of the following.
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*/
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enum {
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STMPE_IDX_CHIP_ID,
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STMPE_IDX_SYS_CTRL,
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STMPE_IDX_SYS_CTRL2,
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STMPE_IDX_ICR_LSB,
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STMPE_IDX_IER_LSB,
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STMPE_IDX_IER_MSB,
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STMPE_IDX_ISR_LSB,
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STMPE_IDX_ISR_MSB,
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STMPE_IDX_GPMR_LSB,
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STMPE_IDX_GPMR_CSB,
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STMPE_IDX_GPMR_MSB,
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STMPE_IDX_GPSR_LSB,
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STMPE_IDX_GPSR_CSB,
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STMPE_IDX_GPSR_MSB,
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STMPE_IDX_GPCR_LSB,
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STMPE_IDX_GPCR_CSB,
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STMPE_IDX_GPCR_MSB,
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STMPE_IDX_GPDR_LSB,
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STMPE_IDX_GPDR_CSB,
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STMPE_IDX_GPDR_MSB,
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STMPE_IDX_GPEDR_LSB,
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STMPE_IDX_GPEDR_CSB,
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STMPE_IDX_GPEDR_MSB,
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STMPE_IDX_GPRER_LSB,
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STMPE_IDX_GPRER_CSB,
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STMPE_IDX_GPRER_MSB,
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STMPE_IDX_GPFER_LSB,
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STMPE_IDX_GPFER_CSB,
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STMPE_IDX_GPFER_MSB,
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STMPE_IDX_GPPUR_LSB,
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STMPE_IDX_GPPDR_LSB,
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STMPE_IDX_GPAFR_U_MSB,
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STMPE_IDX_IEGPIOR_LSB,
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STMPE_IDX_IEGPIOR_CSB,
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STMPE_IDX_IEGPIOR_MSB,
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STMPE_IDX_ISGPIOR_LSB,
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STMPE_IDX_ISGPIOR_CSB,
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STMPE_IDX_ISGPIOR_MSB,
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STMPE_IDX_MAX,
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};
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struct stmpe_variant_info;
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struct stmpe_client_info;
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struct stmpe_platform_data;
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/**
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* struct stmpe - STMPE MFD structure
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* @vcc: optional VCC regulator
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* @vio: optional VIO regulator
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* @lock: lock protecting I/O operations
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* @irq_lock: IRQ bus lock
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* @dev: device, mostly for dev_dbg()
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* @irq_domain: IRQ domain
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* @client: client - i2c or spi
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* @ci: client specific information
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* @partnum: part number
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* @variant: the detected STMPE model number
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* @regs: list of addresses of registers which are at different addresses on
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* different variants. Indexed by one of STMPE_IDX_*.
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* @irq: irq number for stmpe
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* @num_gpios: number of gpios, differs for variants
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* @ier: cache of IER registers for bus_lock
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* @oldier: cache of IER registers for bus_lock
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* @pdata: platform data
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*/
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struct stmpe {
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struct regulator *vcc;
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struct regulator *vio;
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struct mutex lock;
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struct mutex irq_lock;
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struct device *dev;
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struct irq_domain *domain;
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void *client;
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struct stmpe_client_info *ci;
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enum stmpe_partnum partnum;
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struct stmpe_variant_info *variant;
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const u8 *regs;
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int irq;
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int num_gpios;
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u8 ier[2];
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u8 oldier[2];
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struct stmpe_platform_data *pdata;
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/* For devices that use an ADC */
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u8 sample_time;
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u8 mod_12b;
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u8 ref_sel;
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u8 adc_freq;
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};
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extern int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 data);
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extern int stmpe_reg_read(struct stmpe *stmpe, u8 reg);
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extern int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length,
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u8 *values);
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extern int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
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const u8 *values);
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extern int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val);
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extern int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins,
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enum stmpe_block block);
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extern int stmpe_enable(struct stmpe *stmpe, unsigned int blocks);
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extern int stmpe_disable(struct stmpe *stmpe, unsigned int blocks);
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extern int stmpe811_adc_common_init(struct stmpe *stmpe);
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#define STMPE_GPIO_NOREQ_811_TOUCH (0xf0)
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#endif
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