diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/staging/sm750fb/ddk750_swi2c.h | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/staging/sm750fb/ddk750_swi2c.h')
-rw-r--r-- | kernel/drivers/staging/sm750fb/ddk750_swi2c.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/kernel/drivers/staging/sm750fb/ddk750_swi2c.h b/kernel/drivers/staging/sm750fb/ddk750_swi2c.h new file mode 100644 index 000000000..ec5463b98 --- /dev/null +++ b/kernel/drivers/staging/sm750fb/ddk750_swi2c.h @@ -0,0 +1,92 @@ +/******************************************************************* +* +* Copyright (c) 2007 by Silicon Motion, Inc. (SMI) +* +* All rights are reserved. Reproduction or in part is prohibited +* without the written consent of the copyright owner. +* +* swi2c.h --- SM750/SM718 DDK +* This file contains the definitions for i2c using software +* implementation. +* +*******************************************************************/ +#ifndef _SWI2C_H_ +#define _SWI2C_H_ + +/* Default i2c CLK and Data GPIO. These are the default i2c pins */ +#define DEFAULT_I2C_SCL 30 +#define DEFAULT_I2C_SDA 31 + +/* + * This function initializes the i2c attributes and bus + * + * Parameters: + * i2cClkGPIO - The GPIO pin to be used as i2c SCL + * i2cDataGPIO - The GPIO pin to be used as i2c SDA + * + * Return Value: + * -1 - Fail to initialize the i2c + * 0 - Success + */ +long swI2CInit( + unsigned char i2cClkGPIO, + unsigned char i2cDataGPIO +); + +/* + * This function reads the slave device's register + * + * Parameters: + * deviceAddress - i2c Slave device address which register + * to be read from + * registerIndex - Slave device's register to be read + * + * Return Value: + * Register value + */ +unsigned char swI2CReadReg( + unsigned char deviceAddress, + unsigned char registerIndex +); + +/* + * This function writes a value to the slave device's register + * + * Parameters: + * deviceAddress - i2c Slave device address which register + * to be written + * registerIndex - Slave device's register to be written + * data - Data to be written to the register + * + * Result: + * 0 - Success + * -1 - Fail + */ +long swI2CWriteReg( + unsigned char deviceAddress, + unsigned char registerIndex, + unsigned char data +); + +/* + * These two functions are used to toggle the data on the SCL and SDA I2C lines. + * The used of these two functions are not recommended unless it is necessary. + */ + +/* + * This function set/reset the SCL GPIO pin + * + * Parameters: + * value - Bit value to set to the SCL or SDA (0 = low, 1 = high) + */ +void swI2CSCL(unsigned char value); + +/* + * This function set/reset the SDA GPIO pin + * + * Parameters: + * value - Bit value to set to the SCL or SDA (0 = low, 1 = high) + */ +void swI2CSDA(unsigned char value); + +#endif /* _SWI2C_H_ */ |