[U-Boot] [PATCH V6 3/5] I2C: add i2c support for Pantheon platform

[Lei Wen]

On Sat, Apr 2, 2011 at 2:34 AM, Prafulla Wadaskar <prafulla at marvell.com> wrote:
>
>
>> -----Original Message-----
>> From: Lei Wen [mailto:leiwen at marvell.com]
>> Sent: Thursday, March 31, 2011 2:07 PM
>> To: Heiko Schocher; Prafulla Wadaskar; Wolfgang Denk; u-
>> boot at lists.denx.de; Marek Vasut; Ashish Karkare; Prabhanjan Sarnaik; Yu
>> Tang; adrian.wenl at gmail.com
>> Subject: [PATCH V6 3/5] I2C: add i2c support for Pantheon platform
>>
>> Add i2c support to dkb board with pantheon soc.
>>
>> Signed-off-by: Lei Wen <leiwen at marvell.com>
>> ---
>> Changelog:
>> V2:
>> NO CHANGE
>>
>> V3:
>> clean code sytle issue
>> Add i2c clock enable code include in I2C configure define block
>>
>> V4:
>> make i2c definition included in the ifdef
>>
>> V5:
>> NO CHANGE
>>
>> V6:
>> Move the CONFIG_CMD_I2C define place
>>
>>  arch/arm/cpu/arm926ejs/pantheon/cpu.c    |   12 ++++++++++++
>>  arch/arm/include/asm/arch-pantheon/cpu.h |    4 +++-
>>  arch/arm/include/asm/arch-pantheon/mfp.h |    6 ++++--
>>  board/Marvell/dkb/dkb.c                  |    4 ++++
>>  include/configs/dkb.h                    |   13 +++++++++++++
>>  5 files changed, 36 insertions(+), 3 deletions(-)
>>
>> diff --git a/arch/arm/cpu/arm926ejs/pantheon/cpu.c
>> b/arch/arm/cpu/arm926ejs/pantheon/cpu.c
>> index 9ddc77c..8b2eafa 100644
>> --- a/arch/arm/cpu/arm926ejs/pantheon/cpu.c
>> +++ b/arch/arm/cpu/arm926ejs/pantheon/cpu.c
>> @@ -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
>> 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..e939196 100644
>> --- a/arch/arm/include/asm/arch-pantheon/mfp.h
>> +++ b/arch/arm/include/asm/arch-pantheon/mfp.h
>> @@ -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... */
>>
>> 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..c893a9d 100644
>> --- a/include/configs/dkb.h
>> +++ b/include/configs/dkb.h
>> @@ -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 +57,18 @@
>>  #include "mv-common.h"
>>
>>  #undef CONFIG_ARCH_MISC_INIT
>
>
>> +
>> +/*
>> + * I2C definition
>> + */
>> +#ifdef CONFIG_CMD_I2C
>> +#define CONFIG_I2C_MV                        1
>> +#define CONFIG_PXA_I2C_REG           0xd4011000
>
> PXA looks invalid reference here, should be MV.
>
>> +#define CONFIG_HARD_I2C                      1
>> +#define CONFIG_SYS_I2C_SPEED         0
>> +#define CONFIG_SYS_I2C_SLAVE         0xfe
>> +#endif
>
> Sorry being not reported earlier.
> But this #ifdefed code should be in mv-common.h or <arch/config.h> so that it can be shared across all the boards supported by the same SoC or IP.

I'd prefer to put it into <arch/config.h>. Would do this change for next post.

Best regards,
Lei