linux-kernel - Re: [PATCH V4 09/11] soc: mediatek: PMIC wrap: add a slave specific struct

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <56AF167C.5030501@openwrt.org>
Date:	Mon, 1 Feb 2016 09:25:32 +0100
From:	John Crispin <blogic@...nwrt.org>
To:	Henry Chen <henryc.chen@...iatek.com>
Cc:	Sascha Hauer <s.hauer@...gutronix.de>,
	linux-kernel@...r.kernel.org, Flora Fu <flora.fu@...iatek.com>,
	linux-mediatek@...ts.infradead.org,
	Matthias Brugger <matthias.bgg@...il.com>,
	Thierry Reding <treding@...dia.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH V4 09/11] soc: mediatek: PMIC wrap: add a slave specific
 struct



On 28/01/2016 03:37, Henry Chen wrote:
> Hi John,
> 
> On Wed, 2016-01-27 at 12:29 +0100, John Crispin wrote:
> 
>> @@ -746,7 +786,7 @@ static int pwrap_init(struct pmic_wrapper *wrp)
>>  	pwrap_writel(wrp, 1, PWRAP_DIO_EN);
>>  
>>  	/* Read Test */
>> -	pwrap_read(wrp, PWRAP_DEW_READ_TEST, &rdata);
>> +	pwrap_dew_read(wrp, PWRAP_DEW_READ_TEST, &rdata);
>>  	if (rdata != PWRAP_DEW_READ_TEST_VAL) {
>>  		dev_err(wrp->dev, "Read test failed after switch to DIO mode: 0x%04x != 0x%04x\n",
>>  				PWRAP_DEW_READ_TEST_VAL, rdata);
>> @@ -759,12 +799,13 @@ static int pwrap_init(struct pmic_wrapper *wrp)
>>  		return ret;
>>  
>>  	/* Signature checking - using CRC */
>> -	if (pwrap_write(wrp, PWRAP_DEW_CRC_EN, 0x1))
>> +	if (pwrap_dew_write(wrp, PWRAP_DEW_CRC_EN, 0x1))
>>  		return -EFAULT;
>>  
>>  	pwrap_writel(wrp, 0x1, PWRAP_CRC_EN);
>>  	pwrap_writel(wrp, 0x0, PWRAP_SIG_MODE);
>> -	pwrap_writel(wrp, PWRAP_DEW_CRC_VAL, PWRAP_SIG_ADR);
>> +	pwrap_writel(wrp, wrp->slave->dew_regs[PWRAP_DEW_CRC_VAL],
>> +		     PWRAP_SIG_ADR);
> 
> It should be "pwrap_dew_write(wrp, PWRAP_DEW_CRC_VAL, PWRAP_SIG_ADR);",
> right?
> 
> Henry
> 

Hi Henry,

i stumbled across this aswell. however this DEW access is direct using
pwrap_writel() and not indirect pwrap_write(). hence this is correct.
the DEW wrapper only exists for pwrap_write() style access. this might
have been a bug in the original commit.

this patch however keeps the functionality as is.

	John