[U-Boot] [PATCH v4] dm: spi: Read default speed and mode values from DT

[Vignesh R <vigneshr@ti.com>]

On Tuesday 10 May 2016 11:58 AM, Vignesh R wrote:
> In case of DT boot, don't read default speed and mode for SPI from
> CONFIG_*, instead read from DT node. This will make sure that boards
> with multiple SPI/QSPI controllers can be probed at different
> bus frequencies and SPI modes.
> 
> Signed-off-by: Vignesh R <vigneshr@ti.com>
> Reviewed-by: Simon Glass <sjg@chromium.org>
> Reviewed-by: Mugunthan V N <mugunthanvnm@ti.com>
> 
> ---
> 

Gentle ping...

> v4: Update env_sf.c as well
> 
> v3: Update commit message to mention SPI mode changes
> 
> v2: Initialize speed, mode to 0 instead of -1
> 
>  cmd/sf.c                 | 2 ++
>  common/env_sf.c          | 8 ++++----
>  drivers/spi/spi-uclass.c | 8 ++++++--
>  3 files changed, 12 insertions(+), 6 deletions(-)
> 
> diff --git a/cmd/sf.c b/cmd/sf.c
> index 42862d9d921a..286906c3a151 100644
> --- a/cmd/sf.c
> +++ b/cmd/sf.c
> @@ -88,6 +88,8 @@ static int do_spi_flash_probe(int argc, char * const argv[])
>  #ifdef CONFIG_DM_SPI_FLASH
>  	struct udevice *new, *bus_dev;
>  	int ret;
> +	/* In DM mode defaults will be taken from DT */
> +	speed = 0, mode = 0;
>  #else
>  	struct spi_flash *new;
>  #endif
> diff --git a/common/env_sf.c b/common/env_sf.c
> index 273098ceb605..c53200f5c6fe 100644
> --- a/common/env_sf.c
> +++ b/common/env_sf.c
> @@ -55,9 +55,9 @@ int saveenv(void)
>  #ifdef CONFIG_DM_SPI_FLASH
>  	struct udevice *new;
>  
> +	/* speed and mode will be read from DT */
>  	ret = spi_flash_probe_bus_cs(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
> -				     CONFIG_ENV_SPI_MAX_HZ,
> -				     CONFIG_ENV_SPI_MODE, &new);
> +				     0, 0, &new);
>  	if (ret) {
>  		set_default_env("!spi_flash_probe_bus_cs() failed");
>  		return 1;
> @@ -245,9 +245,9 @@ int saveenv(void)
>  #ifdef CONFIG_DM_SPI_FLASH
>  	struct udevice *new;
>  
> +	/* speed and mode will be read from DT */
>  	ret = spi_flash_probe_bus_cs(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
> -				     CONFIG_ENV_SPI_MAX_HZ,
> -				     CONFIG_ENV_SPI_MODE, &new);
> +				     0, 0, &new);
>  	if (ret) {
>  		set_default_env("!spi_flash_probe_bus_cs() failed");
>  		return 1;
> diff --git a/drivers/spi/spi-uclass.c b/drivers/spi/spi-uclass.c
> index 5561f36762f9..5fb5630e2981 100644
> --- a/drivers/spi/spi-uclass.c
> +++ b/drivers/spi/spi-uclass.c
> @@ -264,6 +264,7 @@ int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode,
>  		       struct udevice **busp, struct spi_slave **devp)
>  {
>  	struct udevice *bus, *dev;
> +	struct dm_spi_slave_platdata *plat;
>  	bool created = false;
>  	int ret;
>  
> @@ -280,8 +281,6 @@ int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode,
>  	 * SPI flash chip - we will bind to the correct driver.
>  	 */
>  	if (ret == -ENODEV && drv_name) {
> -		struct dm_spi_slave_platdata *plat;
> -
>  		debug("%s: Binding new device '%s', busnum=%d, cs=%d, driver=%s\n",
>  		      __func__, dev_name, busnum, cs, drv_name);
>  		ret = device_bind_driver(bus, drv_name, dev_name, &dev);
> @@ -308,6 +307,11 @@ int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode,
>  		slave->dev = dev;
>  	}
>  
> +	plat = dev_get_parent_platdata(dev);
> +	if (!speed) {
> +		speed = plat->max_hz;
> +		mode = plat->mode;
> +	}
>  	ret = spi_set_speed_mode(bus, speed, mode);
>  	if (ret)
>  		goto err;
> 

-- 
Regards
Vignesh