[U-Boot] [PATCH v2] DW SPI: Get clock value from Device Tree

[Jagan Teki]

On Fri, Oct 13, 2017 at 8:48 PM, Eugeniy Paltsev
<Eugeniy.Paltsev at synopsys.com> wrote:
> Add option to set spi controller clock frequency via device tree
> using standard clock bindings.
> Old way of setting spi controller clock frequency (via implementation
> of 'cm_get_spi_controller_clk_hz' function in platform specific code)
> remains supported for backward compatibility.
>
> Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev at synopsys.com>
> ---
> Changes v1->v2:
>   * disable clock if we can't get the rate.
>   * get rid of cm_get_spi_controller_clk_hz weak declaration.
>
>  drivers/spi/designware_spi.c | 65 +++++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 64 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/spi/designware_spi.c b/drivers/spi/designware_spi.c
> index 5aa507b..9eb5b1c 100644
> --- a/drivers/spi/designware_spi.c
> +++ b/drivers/spi/designware_spi.c
> @@ -11,6 +11,7 @@
>   */
>
>  #include <common.h>
> +#include <clk.h>
>  #include <dm.h>
>  #include <errno.h>
>  #include <malloc.h>
> @@ -18,7 +19,10 @@
>  #include <fdtdec.h>
>  #include <linux/compat.h>
>  #include <asm/io.h>
> +/* Only SOCFPGA_GEN5 and SOCFPGA_ARRIA10 uses their clock_manager functions */
> +#if defined(CONFIG_TARGET_SOCFPGA_GEN5) || defined(CONFIG_TARGET_SOCFPGA_ARRIA10)
>  #include <asm/arch/clock_manager.h>
> +#endif

How hard it is to make others to use clock manager? do you have any list?

thanks!
-- 
Jagan Teki
Free Software Engineer | www.openedev.com
U-Boot, Linux | Upstream Maintainer
Hyderabad, India.