[PATCH] clk: ux500: fix bit error

[Mike Turquette]

On Tue, Nov 27, 2012 at 2:56 PM, Ulf Hansson <ulf.hansson at linaro.org> wrote:
> On 27 November 2012 20:15, Linus Walleij <linus.walleij at stericsson.com> wrote:
>> From: Linus Walleij <linus.walleij at linaro.org>
>>
>> This fixes a bit error in the U8500 clock implementation: the
>> unused p2_pclk12 registered at bit 12 in periphereral group 6
>> was defined as using bit 11 rather than bit 12.
>>
>> When walking over and disabling the unused clocks in the tree
>> at late init time, p2_pclk12 was disabled, by effectively
>> clearing the but for p2_pclk11 instead of bit 12 as it should
>> have, thus disabling gpio block 6 and 7.
>>
>> Reported-by: Lee Jones <lee.jones at linaro.org>
>> Cc: Ulf Hansson <ulf.hansson at linaro.org>
>> Cc: Philippe Begnic <philippe.begnic at st.com>
>> Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
>> ---
>> Mike if this gets ACKed (beware of more mistakes from this
>> coder) it should go into v3.7 or if that fails be tagged with
>> Cc: stable at kernel.org.
>> ---
>>  drivers/clk/ux500/u8500_clk.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/clk/ux500/u8500_clk.c b/drivers/clk/ux500/u8500_clk.c
>> index fb9f291..20ecaa7 100644
>> --- a/drivers/clk/ux500/u8500_clk.c
>> +++ b/drivers/clk/ux500/u8500_clk.c
>> @@ -317,7 +317,7 @@ void u8500_clk_init(void)
>>         clk_register_clkdev(clk, NULL, "gpioblock1");
>>
>>         clk = clk_reg_prcc_pclk("p2_pclk12", "per2clk", U8500_CLKRST2_BASE,
>> -                               BIT(11), 0);
>> +                               BIT(12), 0);
>>
>>         clk = clk_reg_prcc_pclk("p3_pclk0", "per3clk", U8500_CLKRST3_BASE,
>>                                 BIT(0), 0);
>> --
>> 1.7.11.3
>>
>
> Acked-by: Ulf Hansson <ulf.hansson at linaro.org>
>
> Yes, for sure this need to go stable. What a mess a "typo" can cause.
> Thanks a lot Linus for finding this!
>

This one is queued in clk-next for the 3.8 merge window with a Cc to stable.

All but one of the patches I've sent as fixes for the 3.7-rc bugfix
window have been for ux500.  I'm happy to see the this code is getting
used and fixed on your platforms but more testing on the initial
patches would be good.

Also, please forget that I said this when the OMAP clock patches get
merged as I wish to maintain a double standard.

Regards,
Mike

> Kind regards
> Ulf Hansson