[U-Boot,v2,2/2] odroid: usbhost - Add missing gpio_request call

The USB host code was missing gpio_request() calls before using the gpio
functions, causing errors to be printed out.

As a side note calls to max77686_set_buck_mode(OPMODE_OFF/OPMODE_ON) have
been removed, as they did not have any effect. This is as per Przemyslaw:
I looked into the documentation and there is a "ENB8" pin in PMIC package.
This pin allows steering BUCK8 ON/OFF by the hardware. If ENB8 is set to low
then you can do on/off. If high, then you cannot change its state by I2C
write, which seems to be the case with the Odroids.

Signed-off-by: Suriyan Ramasami <suriyan.r@gmail.com>
Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
---

Changes in v2:
- Add comment why max77686_set_buck_mode() has been removed
Series-changes: 1
- Added gpio_request() call in board_gpio_init()

 board/samsung/odroid/odroid.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

On Thu, 2014-11-20 at 17:26 -0800, Suriyan Ramasami wrote:
> The USB host code was missing gpio_request() calls before using the gpio
> functions, causing errors to be printed out.
> 
> As a side note calls to max77686_set_buck_mode(OPMODE_OFF/OPMODE_ON) have
> been removed, as they did not have any effect. This is as per Przemyslaw:
> I looked into the documentation and there is a "ENB8" pin in PMIC package.
> This pin allows steering BUCK8 ON/OFF by the hardware. If ENB8 is set to low
> then you can do on/off. If high, then you cannot change its state by I2C
> write, which seems to be the case with the Odroids.
> 
> Signed-off-by: Suriyan Ramasami <suriyan.r@gmail.com>
> Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>

Tested on top of u-boot-samsung head
(6a23c6533c880d557e786df81fa21b62168db6d9), with this patch ethernet
support work on my Odroid X2 (emmc boot). Free free to add,
  Tested-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>

> ---
> 
> Changes in v2:
> - Add comment why max77686_set_buck_mode() has been removed
> Series-changes: 1
> - Added gpio_request() call in board_gpio_init()
> 
>  board/samsung/odroid/odroid.c | 13 +++++++++++--
>  1 file changed, 11 insertions(+), 2 deletions(-)
> 
> diff --git a/board/samsung/odroid/odroid.c b/board/samsung/odroid/odroid.c
> index f7396ab..a2c008e 100644
> --- a/board/samsung/odroid/odroid.c
> +++ b/board/samsung/odroid/odroid.c
> @@ -382,6 +382,17 @@ static void board_gpio_init(void)
>  	gpio_set_pull(EXYNOS4X12_GPIO_X31, S5P_GPIO_PULL_UP);
>  	gpio_set_drv(EXYNOS4X12_GPIO_X31, S5P_GPIO_DRV_4X);
>  	gpio_direction_input(EXYNOS4X12_GPIO_X31);
> +
> +#ifdef CONFIG_CMD_USB
> +	/* USB3503A Reference frequency */
> +	gpio_request(EXYNOS4X12_GPIO_X30, "USB3503A RefFreq");
> +
> +	/* USB3503A Connect */
> +	gpio_request(EXYNOS4X12_GPIO_X34, "USB3503A Connect");
> +
> +	/* USB3503A Reset */
> +	gpio_request(EXYNOS4X12_GPIO_X35, "USB3503A Reset");
> +#endif
>  }
>  
>  static int pmic_init_max77686(void)
> @@ -489,10 +500,8 @@ int board_usb_init(int index, enum usb_init_type init)
>  
>  	p_pmic = pmic_get("MAX77686_PMIC");
>  	if (p_pmic && !pmic_probe(p_pmic)) {
> -		max77686_set_buck_mode(p_pmic, 8, OPMODE_OFF);
>  		max77686_set_buck_voltage(p_pmic, 8, 750000);
>  		max77686_set_buck_voltage(p_pmic, 8, 3300000);
> -		max77686_set_buck_mode(p_pmic, 8, OPMODE_ON);
>  	}
>  
>  #endif

On 21/11/14 10:26, Suriyan Ramasami wrote:
> The USB host code was missing gpio_request() calls before using the gpio
> functions, causing errors to be printed out.
> 
> As a side note calls to max77686_set_buck_mode(OPMODE_OFF/OPMODE_ON) have
> been removed, as they did not have any effect. This is as per Przemyslaw:
> I looked into the documentation and there is a "ENB8" pin in PMIC package.
> This pin allows steering BUCK8 ON/OFF by the vhardware. If ENB8 is set to low
> then you can do on/off. If high, then you cannot change its state by I2C
> write, which seems to be the case with the Odroids.
> 
> Signed-off-by: Suriyan Ramasami <suriyan.r@gmail.com>
> Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
> ---
> 
> Changes in v2:
> - Add comment why max77686_set_buck_mode() has been removed
> Series-changes: 1
> - Added gpio_request() call in board_gpio_init()
> 
>  board/samsung/odroid/odroid.c | 13 +++++++++++--
>  1 file changed, 11 insertions(+), 2 deletions(-)
> 

applied to u-boot-samsung.

Thanks,
Minkyu Kang.