linux-kernel - Re: [PATCH V4 11/11] soc: mediatek: PMIC wrap: add MT2701/7623 support

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Date:	Mon, 1 Feb 2016 12:29:46 +0100
From:	John Crispin <blogic@...nwrt.org>
To:	Matthias Brugger <matthias.bgg@...il.com>
Cc:	Sascha Hauer <s.hauer@...gutronix.de>,
	Henry Chen <henryc.chen@...iatek.com>,
	Thierry Reding <treding@...dia.com>,
	Flora Fu <flora.fu@...iatek.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V4 11/11] soc: mediatek: PMIC wrap: add MT2701/7623
 support



On 01/02/2016 12:25, Matthias Brugger wrote:
> On 27/01/16 12:29, John Crispin wrote:
> 
> [...]
> 
>>
>> +static int pwrap_mt2701_init_reg_clock(struct pmic_wrapper *wrp)
>> +{
>> +    switch (wrp->slave->type) {
>> +    case PMIC_MT6397:
>> +        pwrap_writel(wrp, 0xc, PWRAP_RDDMY);
>> +        pwrap_writel(wrp, 0x4, PWRAP_CSHEXT_WRITE);
>> +        pwrap_writel(wrp, 0x0, PWRAP_CSHEXT_READ);
>> +        pwrap_writel(wrp, 0x2, PWRAP_CSLEXT_START);
>> +        pwrap_writel(wrp, 0x2, PWRAP_CSLEXT_END);
>> +        break;
>> +
>> +    case PMIC_MT6323:
>> +        pwrap_writel(wrp, 0x8, PWRAP_RDDMY);
>> +        pwrap_dew_write(wrp, PWRAP_DEW_RDDMY_NO, 0x8);
>> +        pwrap_writel(wrp, 0x5, PWRAP_CSHEXT_WRITE);
>> +        pwrap_writel(wrp, 0x0, PWRAP_CSHEXT_READ);
>> +        pwrap_writel(wrp, 0x2, PWRAP_CSLEXT_START);
>> +        pwrap_writel(wrp, 0x2, PWRAP_CSLEXT_END);
>> +        break;
>> +    }
>> +
>> +    return 0;
>> +}
>> +
> 
> I forgot this:
> So mt2701 can be used with both PMICs? Just wondering, as from what I
> know, SoC and PMIC a tightly coupled.

yes, it can be run with old and new style pmics. this is why the MAN_CMD
SPI_W bit has changed. the old BIT(13) is used to tell the wrapper what
slave type it has.

there is a way to runtime set the pmic but there is still a detail i
need to look at so it is not part of this series

> 
> In general this series looks quite good to me.
> 

i'll spin V5 during the day. busy adding dual gmac support to the
ethernet driver just now.

	John