[U-Boot] [PATCH] imx: mx6: Fix incorrect clear mmdc_ch0 handshake mask

[Stefano Babic <sbabic@denx.de>]

On 25/03/2016 10:14, Peng Fan wrote:
> Hi Stefano,
> 
> On Wed, Mar 09, 2016 at 05:37:28PM +0800, Peng Fan wrote:
>> Hi Stefano,
>>
>> On Wed, Mar 09, 2016 at 10:47:38AM +0100, Stefano Babic wrote:
>>> Hi Peng, Ye,
>>>
>>> On 09/03/2016 09:13, Peng Fan wrote:
>>>> From: Ye Li <ye.li@nxp.com>
>>>>
>>>> Since the MX6UL/SL/SX only has one DDR channel, in CCM_CCDR register
>>>> the bit[17] for mmdc_ch0 is reserved and its proper state should be 1.
>>>> When clear this bit, the periph_clk_sel cannot be set and that
>>>> CDHIPR[periph_clk_sel_busy] handshake never clears.
>>>>
>>>> Signed-off-by: Ye Li <ye.li@nxp.com>
>>>> Signed-off-by: Peng Fan <van.freenix@gmail.com>
>>>> ---
>>>>  arch/arm/cpu/armv7/mx6/soc.c | 5 ++++-
>>>>  1 file changed, 4 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c
>>>> index 91a3deb..bdd41b0 100644
>>>> --- a/arch/arm/cpu/armv7/mx6/soc.c
>>>> +++ b/arch/arm/cpu/armv7/mx6/soc.c
>>>> @@ -278,7 +278,10 @@ static void clear_mmdc_ch_mask(void)
>>>>  	reg = readl(&mxc_ccm->ccdr);
>>>>  
>>>>  	/* Clear MMDC channel mask */
>>>> -	reg &= ~(MXC_CCM_CCDR_MMDC_CH1_HS_MASK | MXC_CCM_CCDR_MMDC_CH0_HS_MASK);
>>>> +	if (is_cpu_type(MXC_CPU_MX6SX) || is_cpu_type(MXC_CPU_MX6UL) || is_cpu_type(MXC_CPU_MX6SL))
>>>> +		reg &= ~(MXC_CCM_CCDR_MMDC_CH1_HS_MASK);
>>>> +	else
>>>> +		reg &= ~(MXC_CCM_CCDR_MMDC_CH1_HS_MASK | MXC_CCM_CCDR_MMDC_CH0_HS_MASK);
>>>>  	writel(reg, &mxc_ccm->ccdr);
>>>>  }
>>>>  
>>>
>>> Acked-by: Stefano Babic <sbabic@denx.de>
>>>
>>> This is a fix, and my question to you both: is it enough to merge it
>>> after 2016.03 ? I have not read about big issues due to periph_clk_sel,
>>> and maybe we can postponed it (or I merge directly into -next as several
>>> of you have already proposed).
>>
>> Yeah. It's okay to merge after 2016.03.


I do it

Stefano

> 
> Will you pick up this patch?
> 
> Regards,
> Peng.
> 
>>
>> Regards,
>> Peng.
>>
>>>
>>> Best regards,
>>> Stefano Babic
>>>
>>>
>>>
>>> -- 
>>> =====================================================================
>>> DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
>>> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
>>> Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
>>> =====================================================================


-- 
=====================================================================
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================