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I2C: add i2c support for Pantheon platform 

Add i2c support to dkb board with pantheon soc.

Acked-by: Heiko Schocher <hs@denx.de>
Acked-by: Prafulla Wadaskar <prafulla@marvell.com>
Signed-off-by: Lei Wen <leiwen@marvell.com>
This commit is contained in:
Lei Wen 2011-04-13 23:48:34 +05:30 committed by Albert ARIBAUD
parent 3df619ec2c
commit aa3b168e31
6 changed files with 35 additions and 3 deletions
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12
arch/arm/cpu/arm926ejs/pantheon/cpu.c
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@ -59,6 +59,12 @@ int arch_cpu_init(void)
/* Enable GPIO clock */
writel(APBC_APBCLK, &apbclkres->gpio);
#ifdef CONFIG_I2C_MV
/* Enable I2C clock */
writel(APBC_RST | APBC_FNCLK | APBC_APBCLK, &apbclkres->twsi);
writel(APBC_FNCLK | APBC_APBCLK, &apbclkres->twsi);
#endif
icache_enable();
return 0;
@ -76,3 +82,9 @@ int print_cpuinfo(void)
return 0;
}
#endif
#ifdef CONFIG_I2C_MV
void i2c_clk_enable(void)
{
}
#endif

10
arch/arm/include/asm/arch-pantheon/config.h
View File

@ -34,5 +34,15 @@
#define MV_UART_CONSOLE_BASE PANTHEON_UART1_BASE
#define CONFIG_SYS_NS16550_IER (1 << 6) /* Bit 6 in UART_IER register
represents UART Unit Enable */
/*
* I2C definition
*/
#ifdef CONFIG_CMD_I2C
#define CONFIG_I2C_MV 1
#define CONFIG_MV_I2C_REG 0xd4011000
#define CONFIG_HARD_I2C 1
#define CONFIG_SYS_I2C_SPEED 0
#define CONFIG_SYS_I2C_SLAVE 0xfe
#endif
#endif /* _PANTHEON_CONFIG_H */

4
arch/arm/include/asm/arch-pantheon/cpu.h
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@ -50,7 +50,9 @@ struct panthapb_registers {
u32 uart0; /*0x000*/
u32 uart1; /*0x004*/
u32 gpio; /*0x008*/
u8 pad0[0x034 - 0x08 - 4];
u8 pad0[0x02c - 0x08 - 4];
u32 twsi; /*0x02c*/
u8 pad1[0x034 - 0x2c - 4];
u32 timers; /*0x034*/
};

6
arch/arm/include/asm/arch-pantheon/mfp.h
View File

@ -32,8 +32,10 @@
* offset, pull,pF, drv,dF, edge,eF ,afn,aF
*/
/* UART2 */
#define MFP47_UART2_RXD MFP_REG(0x198) | MFP_AF6 | MFP_DRIVE_MEDIUM
#define MFP48_UART2_TXD MFP_REG(0x19c) | MFP_AF6 | MFP_DRIVE_MEDIUM
#define MFP47_UART2_RXD (MFP_REG(0x198) | MFP_AF6 | MFP_DRIVE_MEDIUM)
#define MFP48_UART2_TXD (MFP_REG(0x19c) | MFP_AF6 | MFP_DRIVE_MEDIUM)
#define MFP53_CI2C_SCL (MFP_REG(0x1b0) | MFP_AF2 | MFP_DRIVE_MEDIUM)
#define MFP54_CI2C_SDA (MFP_REG(0x1b4) | MFP_AF2 | MFP_DRIVE_MEDIUM)
/* More macros can be defined here... */

4
board/Marvell/dkb/dkb.c
View File

@ -36,6 +36,10 @@ int board_early_init_f(void)
MFP47_UART2_RXD,
MFP48_UART2_TXD,
/* I2C */
MFP53_CI2C_SCL,
MFP54_CI2C_SDA,
MFP_EOC /*End of configureation*/
};
/* configure MFP's */

2
include/configs/dkb.h
View File

@ -47,6 +47,7 @@
#define CONFIG_SYS_NO_FLASH /* Declare no flash (NOR/SPI) */
#include <config_cmd_default.h>
#define CONFIG_CMD_AUTOSCRIPT
#define CONFIG_CMD_I2C
#undef CONFIG_CMD_NET
#undef CONFIG_CMD_NFS
/*
@ -56,6 +57,7 @@
#include "mv-common.h"
#undef CONFIG_ARCH_MISC_INIT
/*
* Environment variables configurations
*/