[U-Boot] [PATCH 2/2] powerpc/esdhc: hack t4240 host capabilities register for VS33 bit

[Zhang Haijun]

于 2013/10/30 2:34, Scott Wood 写道:
> On Fri, 2013-10-25 at 09:54 +0800, Haijun Zhang wrote:
>> T4240 eSDHC host capabilities reigster should have VS33 bit define.
>> hack the code to add the 3.3 voltage support
>>
>> Signed-off-by: Roy Zang <tie-fei.zang at freescale.com>
>> Signed-off-by: Haijun Zhang <Haijun.Zhang at freescale.com>
>> ---
>>   arch/powerpc/include/asm/config_mpc85xx.h | 1 +
>>   drivers/mmc/fsl_esdhc.c                   | 6 ++++++
>>   2 files changed, 7 insertions(+)
>>
>> diff --git a/arch/powerpc/include/asm/config_mpc85xx.h b/arch/powerpc/include/asm/config_mpc85xx.h
>> index 946ea97..84e79c8 100644
>> --- a/arch/powerpc/include/asm/config_mpc85xx.h
>> +++ b/arch/powerpc/include/asm/config_mpc85xx.h
>> @@ -596,6 +596,7 @@
>>   #define CONFIG_SYS_FSL_SRIO_LIODN
>>   #define CONFIG_SYS_FSL_USB_DUAL_PHY_ENABLE
>>   #define CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
>> +#define CONFIG_SYS_FSL_MMC_HAS_CAPBLT_VS33
>>   #define CONFIG_SYS_FSL_ERRATUM_A004468
>>   #define CONFIG_SYS_FSL_ERRATUM_A_004934
>>   #define CONFIG_SYS_FSL_ERRATUM_A005871
>> diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
>> index d4c1eef..b8b2907 100644
>> --- a/drivers/mmc/fsl_esdhc.c
>> +++ b/drivers/mmc/fsl_esdhc.c
>> @@ -545,6 +545,12 @@ int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg)
>>   	caps = caps & ~(ESDHC_HOSTCAPBLT_SRS |
>>   			ESDHC_HOSTCAPBLT_VS18 | ESDHC_HOSTCAPBLT_VS30);
>>   #endif
>> +
>> +/* T4240 host controller capabilities register should have VS33 bit */
>> +#ifdef CONFIG_SYS_FSL_MMC_HAS_CAPBLT_VS33
>> +	caps = caps | ESDHC_HOSTCAPBLT_VS33;
>> +#endif
> Is there an erratum associated with this?  Is this that
> t4240qds-specific bug, or a different bug that affects all t4240?
No such relevant errata. I think this capacity missing is also exist on 
other T4240 board but not be confirmed.
So, I update this patch to make sure the change only affect T4240QDS.
> -Scott
>
>

-- 
Thanks & Regards
Haijun.