[U-Boot] [PATCH v3 06/10] pinctrl: rockchip: Special treatment for RK3288 gpio0 pins' drive strength【请注意，邮件由u-boot-bounces at lists.denx.de代发】

[Kever Yang]

On 05/07/2019 11:43 AM, Kever Yang wrote:
>
> On 04/16/2019 09:56 PM, David Wu wrote:
>> RK3288 pmu_gpio0 drive strength setting have no higher 16 writing
>> corresponding bits, need to read before write the register.
>>
>> Signed-off-by: David Wu <david.wu at rock-chips.com>
> Reviewed-by: Kever Yang <kever.yang at rock-chips.com>

Applied to u-boot-rockchip, thanks!

>
> Thanks,
> - Kever
>> ---
>>
>> Change in v3:
>> - Add some comment
>>
>>  drivers/pinctrl/rockchip/pinctrl-rk3288.c | 11 +++++++++--
>>  1 file changed, 9 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/pinctrl/rockchip/pinctrl-rk3288.c b/drivers/pinctrl/rockchip/pinctrl-rk3288.c
>> index 6ae9f1c76e..d1b9aeb3d9 100644
>> --- a/drivers/pinctrl/rockchip/pinctrl-rk3288.c
>> +++ b/drivers/pinctrl/rockchip/pinctrl-rk3288.c
>> @@ -143,8 +143,15 @@ static int rk3288_set_drive(struct rockchip_pin_bank *bank,
>>  		return ret;
>>  	}
>>  
>> -	/* enable the write to the equivalent lower bits */
>> -	data = ((1 << ROCKCHIP_DRV_BITS_PER_PIN) - 1) << (bit + 16);
>> +	/* bank0 is special, there are no higher 16 bit writing bits. */
>> +	if (bank->bank_num == 0) {
>> +		regmap_read(regmap, reg, &data);
>> +		data &= ~(((1 << ROCKCHIP_DRV_BITS_PER_PIN) - 1) << bit);
>> +	} else {
>> +		/* enable the write to the equivalent lower bits */
>> +		data = ((1 << ROCKCHIP_DRV_BITS_PER_PIN) - 1) << (bit + 16);
>> +	}
>> +
>>  	data |= (ret << bit);
>>  	ret = regmap_write(regmap, reg, data);
>>  	return ret;
>
>
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