Add i2c support to dkb board with pantheon soc.
Signed-off-by: Lei Wen leiwen@marvell.com --- arch/arm/cpu/arm926ejs/pantheon/cpu.c | 10 ++++++++++ arch/arm/include/asm/arch-pantheon/cpu.h | 4 +++- arch/arm/include/asm/arch-pantheon/mfp.h | 2 ++ board/Marvell/dkb/dkb.c | 4 ++++ include/configs/dkb.h | 11 +++++++++++ 5 files changed, 30 insertions(+), 1 deletions(-)
diff --git a/arch/arm/cpu/arm926ejs/pantheon/cpu.c b/arch/arm/cpu/arm926ejs/pantheon/cpu.c index 9ddc77c..88ecfae 100644 --- a/arch/arm/cpu/arm926ejs/pantheon/cpu.c +++ b/arch/arm/cpu/arm926ejs/pantheon/cpu.c @@ -59,6 +59,10 @@ int arch_cpu_init(void) /* Enable GPIO clock */ writel(APBC_APBCLK, &apbclkres->gpio);
+ /* Enable I2C clock */ + writel(APBC_RST | APBC_FNCLK | APBC_APBCLK, &apbclkres->twsi); + writel(APBC_FNCLK | APBC_APBCLK, &apbclkres->twsi); + icache_enable();
return 0; @@ -76,3 +80,9 @@ int print_cpuinfo(void) return 0; } #endif + +#ifdef CONFIG_PXA_I2C +void i2c_clk_enable (void) +{ +} +#endif diff --git a/arch/arm/include/asm/arch-pantheon/cpu.h b/arch/arm/include/asm/arch-pantheon/cpu.h index 30f4393..60955c5 100644 --- a/arch/arm/include/asm/arch-pantheon/cpu.h +++ b/arch/arm/include/asm/arch-pantheon/cpu.h @@ -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*/ };
diff --git a/arch/arm/include/asm/arch-pantheon/mfp.h b/arch/arm/include/asm/arch-pantheon/mfp.h index fb291cf..041e64c 100644 --- a/arch/arm/include/asm/arch-pantheon/mfp.h +++ b/arch/arm/include/asm/arch-pantheon/mfp.h @@ -34,6 +34,8 @@ /* 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 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... */
diff --git a/board/Marvell/dkb/dkb.c b/board/Marvell/dkb/dkb.c index 72a2d2a..00f73e7 100644 --- a/board/Marvell/dkb/dkb.c +++ b/board/Marvell/dkb/dkb.c @@ -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 */ diff --git a/include/configs/dkb.h b/include/configs/dkb.h index 638af5e..75c4b99 100644 --- a/include/configs/dkb.h +++ b/include/configs/dkb.h @@ -56,6 +56,17 @@ #include "mv-common.h"
#undef CONFIG_ARCH_MISC_INIT + +/* + * I2C definition + */ +#define CONFIG_CMD_I2C +#define CONFIG_PXA_I2C 1 +#define CONFIG_PXA_I2C_REG 0xd4011000 +#define CONFIG_HARD_I2C 1 +#define CONFIG_SYS_I2C_SPEED 0 +#define CONFIG_SYS_I2C_SLAVE 0xfe + /* * Environment variables configurations */