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i2c: Add support for designware i2c controller

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Earlier, a driver exists in the u-boot source for designware i2c interface. That
driver was specific to spear platforms. This patch implements the i2c controller
as a generic driver which can be used by multiple platforms

The driver files are now renamed to designware_i2c.c and designware_i2c.h and
these are moved into drivers/i2c folder for reusability by other
platforms

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
This commit is contained in:
Vipin KUMAR 2012-02-26 23:13:29 +00:00 • committed by Heiko Schocher
parent 2d344a2ab2
commit 031ed2fa74
4 changed files with 7 additions and 7 deletions
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2
drivers/i2c/Makefile
View file

@ -27,6 +27,7 @@ LIB := $(obj)libi2c.o
COBJS-$(CONFIG_BFIN_TWI_I2C) += bfin-twi_i2c.o COBJS-$(CONFIG_BFIN_TWI_I2C) += bfin-twi_i2c.o
COBJS-$(CONFIG_DRIVER_DAVINCI_I2C) += davinci_i2c.o COBJS-$(CONFIG_DRIVER_DAVINCI_I2C) += davinci_i2c.o
COBJS-$(CONFIG_DW_I2C) += designware_i2c.o
COBJS-$(CONFIG_FSL_I2C) += fsl_i2c.o COBJS-$(CONFIG_FSL_I2C) += fsl_i2c.o
COBJS-$(CONFIG_I2C_MVTWSI) += mvtwsi.o COBJS-$(CONFIG_I2C_MVTWSI) += mvtwsi.o
COBJS-$(CONFIG_I2C_MV) += mv_i2c.o COBJS-$(CONFIG_I2C_MV) += mv_i2c.o
@ -40,7 +41,6 @@ COBJS-$(CONFIG_PPC4XX_I2C) += ppc4xx_i2c.o
COBJS-$(CONFIG_DRIVER_S3C24X0_I2C) += s3c24x0_i2c.o COBJS-$(CONFIG_DRIVER_S3C24X0_I2C) += s3c24x0_i2c.o
COBJS-$(CONFIG_S3C44B0_I2C) += s3c44b0_i2c.o COBJS-$(CONFIG_S3C44B0_I2C) += s3c44b0_i2c.o
COBJS-$(CONFIG_SOFT_I2C) += soft_i2c.o COBJS-$(CONFIG_SOFT_I2C) += soft_i2c.o
COBJS-$(CONFIG_SPEAR_I2C) += spr_i2c.o
COBJS-$(CONFIG_TEGRA_I2C) += tegra_i2c.o COBJS-$(CONFIG_TEGRA_I2C) += tegra_i2c.o
COBJS-$(CONFIG_TSI108_I2C) += tsi108_i2c.o COBJS-$(CONFIG_TSI108_I2C) += tsi108_i2c.o
COBJS-$(CONFIG_U8500_I2C) += u8500_i2c.o COBJS-$(CONFIG_U8500_I2C) += u8500_i2c.o

4
drivers/i2c/spr_i2c.c → drivers/i2c/designware_i2c.c
View file

@ -24,7 +24,7 @@
#include <common.h> #include <common.h>
#include <asm/io.h> #include <asm/io.h>
#include <asm/arch/hardware.h> #include <asm/arch/hardware.h>
#include <asm/arch/spr_i2c.h> #include "designware_i2c.h"
static struct i2c_regs *const i2c_regs_p = static struct i2c_regs *const i2c_regs_p =
(struct i2c_regs *)CONFIG_SYS_I2C_BASE; (struct i2c_regs *)CONFIG_SYS_I2C_BASE;
@ -113,7 +113,7 @@ int i2c_get_bus_speed(void)
/* /*
* i2c_init - Init function * i2c_init - Init function
* @speed: required i2c speed * @speed: required i2c speed
* @slaveadd: slave address for the spear device * @slaveadd: slave address for the device
* *
* Initialization function. * Initialization function.
*/ */

6
arch/arm/include/asm/arch-spear/spr_i2c.h → drivers/i2c/designware_i2c.h
View file

@ -21,8 +21,8 @@
* MA 02111-1307 USA * MA 02111-1307 USA
*/ */
#ifndef __SPR_I2C_H_ #ifndef __DW_I2C_H_
#define __SPR_I2C_H_ #define __DW_I2C_H_
struct i2c_regs { struct i2c_regs {
u32 ic_con; u32 ic_con;
@ -143,4 +143,4 @@ struct i2c_regs {
#define I2C_FAST_SPEED 400000 #define I2C_FAST_SPEED 400000
#define I2C_STANDARD_SPEED 100000 #define I2C_STANDARD_SPEED 100000
#endif /* __SPR_I2C_H_ */ #endif /* __DW_I2C_H_ */

2
include/configs/spear-common.h
View file

@ -41,7 +41,7 @@
/* I2C driver configuration */ /* I2C driver configuration */
#define CONFIG_HARD_I2C #define CONFIG_HARD_I2C
#define CONFIG_SPEAR_I2C #define CONFIG_DW_I2C
#define CONFIG_SYS_I2C_SPEED 400000 #define CONFIG_SYS_I2C_SPEED 400000
#define CONFIG_SYS_I2C_SLAVE 0x02 #define CONFIG_SYS_I2C_SLAVE 0x02