[U-Boot] [PATCH v4 3/6] arm:exynos4:pinmux: Modify the gpio function for mmc

[Jaehoon Chung <jh80.chung@samsung.com>]

Hi Piotr,

Sorry, it removed the warning message.

this patch looks good to me.

Acked-by: Jaehoon Chung <jh80.chung@samsung.com>

Best Regards,
Jaehoon Chung

On 09/21/2012 10:27 AM, Jaehoon Chung wrote:
> Hi Piotr,
> 
> I commented at the previously patch. But I didn't find the any modification.
> 
> pinmux.c: In function 'exynos_pinmux_config':
> pinmux.c:296:20: warning: 'bank_ext' may be used uninitialized in this function [-Wuninitialized]
> pinmux.c:272:31: note: 'bank_ext' was declared here
> pinmux.c:290:19: warning: 'bank' may be used uninitialized in this function [-Wuninitialized]
> pinmux.c:272:24: note: 'bank' was declared here
> 
> Could you remove the warning message?
> 
> Best Regards,
> Jaehoon Chung
> 
> On 09/20/2012 07:19 PM, Piotr Wilczek wrote:
>> This patch add pinmux settings for Exynos4 for mmc0 and mmc2
>>
>> Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com>
>> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
>> CC: Minkyu Kang <mk7.kang@samsung.com>
>> ---
>> Changes for v2:
>> - mmc initialisation code moved to pinmux instead of creating a new common code file
>> Changes for v3:
>> - no changes
>> Changes for v4:
>> - eliminated warning for uninitialized bank, bank_ext
>> ---
>>  arch/arm/cpu/armv7/exynos/pinmux.c        |   58 +++++++++++++++++++++++++++++
>>  arch/arm/include/asm/arch-exynos/periph.h |    1 +
>>  2 files changed, 59 insertions(+), 0 deletions(-)
>>
>> diff --git a/arch/arm/cpu/armv7/exynos/pinmux.c b/arch/arm/cpu/armv7/exynos/pinmux.c
>> index 7776add..5796d56 100644
>> --- a/arch/arm/cpu/armv7/exynos/pinmux.c
>> +++ b/arch/arm/cpu/armv7/exynos/pinmux.c
>> @@ -265,10 +265,68 @@ static int exynos5_pinmux_config(int peripheral, int flags)
>>  	return 0;
>>  }
>>  
>> +static int exynos4_mmc_config(int peripheral, int flags)
>> +{
>> +	struct exynos4_gpio_part2 *gpio2 =
>> +		(struct exynos4_gpio_part2 *)samsung_get_base_gpio_part2();
>> +	struct s5p_gpio_bank *bank, *bank_ext;
>> +	int i;
>> +
>> +	switch (peripheral) {
>> +	case PERIPH_ID_SDMMC0:
>> +		bank = &gpio2->k0;
>> +		bank_ext = &gpio2->k1;
>> +		break;
>> +	case PERIPH_ID_SDMMC2:
>> +		bank = &gpio2->k2;
>> +		bank_ext = &gpio2->k3;
>> +		break;
>> +	default:
>> +		return -1;
>> +	}
>> +	for (i = 0; i < 7; i++) {
>> +		if (i == 2)
>> +			continue;
>> +		s5p_gpio_cfg_pin(bank, i,  GPIO_FUNC(0x2));
>> +		s5p_gpio_set_pull(bank, i, GPIO_PULL_NONE);
>> +		s5p_gpio_set_drv(bank, i, GPIO_DRV_4X);
>> +	}
>> +	if (flags & PINMUX_FLAG_8BIT_MODE) {
>> +		for (i = 3; i < 7; i++) {
>> +			s5p_gpio_cfg_pin(bank_ext, i,  GPIO_FUNC(0x3));
>> +			s5p_gpio_set_pull(bank_ext, i, GPIO_PULL_NONE);
>> +			s5p_gpio_set_drv(bank_ext, i, GPIO_DRV_4X);
>> +		}
>> +	}
>> +
>> +	return 0;
>> +}
>> +
>> +static int exynos4_pinmux_config(int peripheral, int flags)
>> +{
>> +	switch (peripheral) {
>> +	case PERIPH_ID_SDMMC0:
>> +	case PERIPH_ID_SDMMC2:
>> +		return exynos4_mmc_config(peripheral, flags);
>> +	case PERIPH_ID_SDMMC1:
>> +	case PERIPH_ID_SDMMC3:
>> +	case PERIPH_ID_SDMMC4:
>> +		printf("SDMMC device %d not implemented\n", peripheral);
>> +		return -1;
>> +	default:
>> +		debug("%s: invalid peripheral %d", __func__, peripheral);
>> +		return -1;
>> +	}
>> +
>> +	return 0;
>> +}
>> +
>>  int exynos_pinmux_config(int peripheral, int flags)
>>  {
>>  	if (cpu_is_exynos5())
>>  		return exynos5_pinmux_config(peripheral, flags);
>> +	else if (cpu_is_exynos4())
>> +		return exynos4_pinmux_config(peripheral, flags);
>>  	else {
>>  		debug("pinmux functionality not supported\n");
>>  		return -1;
>> diff --git a/arch/arm/include/asm/arch-exynos/periph.h b/arch/arm/include/asm/arch-exynos/periph.h
>> index b861d7d..082611c 100644
>> --- a/arch/arm/include/asm/arch-exynos/periph.h
>> +++ b/arch/arm/include/asm/arch-exynos/periph.h
>> @@ -42,6 +42,7 @@ enum periph_id {
>>  	PERIPH_ID_SDMMC1,
>>  	PERIPH_ID_SDMMC2,
>>  	PERIPH_ID_SDMMC3,
>> +	PERIPH_ID_SDMMC4,
>>  	PERIPH_ID_SROMC,
>>  	PERIPH_ID_UART0,
>>  	PERIPH_ID_UART1,
>>
> 
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