xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mfd: smsc: Add support for smsc gpio io/keypad driver

Browse Source 
smsc ece1099 is a keyboard scan or gpio expansion device.
The patch create keypad and gpio expander child for this
multi function smsc driver.

Cc: Benoit Cousson <b-cousson@ti.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Sourav Poddar
2012-10-01 16:31:22 +05:30
committed by Samuel Ortiz
parent c6bed9deb6
commit 8284328cd9
5 changed files with 291 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

109
include/linux/mfd/smsc.h Normal file
View File

@@ -0,0 +1,109 @@
/*
* SMSC ECE1099
*
* Copyright 2012 Texas Instruments Inc.
*
* Author: Sourav Poddar <sourav.poddar@ti.com>
*
* 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.
*
*/
#ifndef __LINUX_MFD_SMSC_H
#define __LINUX_MFD_SMSC_H
#include <linux/regmap.h>
#define SMSC_ID_ECE1099 1
#define SMSC_NUM_CLIENTS 2
#define SMSC_BASE_ADDR 0x38
#define OMAP_GPIO_SMSC_IRQ 151
#define SMSC_MAXGPIO 32
#define SMSC_BANK(offs) ((offs) >> 3)
#define SMSC_BIT(offs) (1u << ((offs) & 0x7))
struct smsc {
struct device *dev;
struct i2c_client *i2c_clients[SMSC_NUM_CLIENTS];
struct regmap *regmap;
int clk;
/* Stored chip id */
int id;
};
struct smsc_gpio;
struct smsc_keypad;
static inline int smsc_read(struct device *child, unsigned int reg,
unsigned int *dest)
{
struct smsc *smsc = dev_get_drvdata(child->parent);
return regmap_read(smsc->regmap, reg, dest);
}
static inline int smsc_write(struct device *child, unsigned int reg,
unsigned int value)
{
struct smsc *smsc = dev_get_drvdata(child->parent);
return regmap_write(smsc->regmap, reg, value);
}
/* Registers for SMSC */
#define SMSC_RESET 0xF5
#define SMSC_GRP_INT 0xF9
#define SMSC_CLK_CTRL 0xFA
#define SMSC_WKUP_CTRL 0xFB
#define SMSC_DEV_ID 0xFC
#define SMSC_DEV_REV 0xFD
#define SMSC_VEN_ID_L 0xFE
#define SMSC_VEN_ID_H 0xFF
/* CLK VALUE */
#define SMSC_CLK_VALUE 0x13
/* Registers for function GPIO INPUT */
#define SMSC_GPIO_DATA_IN_START 0x00
/* Registers for function GPIO OUPUT */
#define SMSC_GPIO_DATA_OUT_START 0x05
/* Definitions for SMSC GPIO CONFIGURATION REGISTER*/
#define SMSC_GPIO_INPUT_LOW 0x01
#define SMSC_GPIO_INPUT_RISING 0x09
#define SMSC_GPIO_INPUT_FALLING 0x11
#define SMSC_GPIO_INPUT_BOTH_EDGE 0x19
#define SMSC_GPIO_OUTPUT_PP 0x21
#define SMSC_GPIO_OUTPUT_OP 0x31
#define GRP_INT_STAT 0xf9
#define SMSC_GPI_INT 0x0f
#define SMSC_CFG_START 0x0A
/* Registers for SMSC GPIO INTERRUPT STATUS REGISTER*/
#define SMSC_GPIO_INT_STAT_START 0x32
/* Registers for SMSC GPIO INTERRUPT MASK REGISTER*/
#define SMSC_GPIO_INT_MASK_START 0x37
/* Registers for SMSC function KEYPAD*/
#define SMSC_KP_OUT 0x40
#define SMSC_KP_IN 0x41
#define SMSC_KP_INT_STAT 0x42
#define SMSC_KP_INT_MASK 0x43
/* Definitions for keypad */
#define SMSC_KP_KSO 0x70
#define SMSC_KP_KSI 0x51
#define SMSC_KSO_ALL_LOW 0x20
#define SMSC_KP_SET_LOW_PWR 0x0B
#define SMSC_KP_SET_HIGH 0xFF
#define SMSC_KSO_EVAL 0x00
#endif /* __LINUX_MFD_SMSC_H */