On 19.03.2019 17:56, Stefan Roese wrote:
> External E-Mail
>
>
> This patch adds an alterative SPL version of atmel_serial_enable_clk().
> This enables the usage of this driver without full clock support (in
> drivers and DT nodes). This saves some space in the SPL image.
>
> If some boards need a different clock than the one provided with this
> patch, then support for this needs to be added later.
>
> Signed-off-by: Stefan Roese <s...@denx.de>
> Cc: Heiko Schocher <h...@denx.de>
> Cc: Andreas Bießmann <andr...@biessmann.org>
> Cc: Eugen Hristev <eugen.hris...@microchip.com>
> ---
> drivers/serial/atmel_usart.c | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/drivers/serial/atmel_usart.c b/drivers/serial/atmel_usart.c
> index aa8cdff840..049172baef 100644
> --- a/drivers/serial/atmel_usart.c
> +++ b/drivers/serial/atmel_usart.c
> @@ -218,6 +218,17 @@ static const struct dm_serial_ops atmel_serial_ops = {
> .setbrg = atmel_serial_setbrg,
> };
>
> +#ifdef CONFIG_SPL_BUILD
> +static int atmel_serial_enable_clk(struct udevice *dev)
> +{
> + struct atmel_serial_priv *priv = dev_get_priv(dev);
> +
> + /* Use fixed clock value in SPL */
> + priv->usart_clk_rate = 132096000;
Hi Stefan,
Does this mean that the SPL will work *if and only if* this clock
matches the board's clock, for all at91 boards? (thus, boards having a
different clock , the serial will not function correctly anymore ?)
Eugen
> +
> + return 0;
> +}
> +#else
> static int atmel_serial_enable_clk(struct udevice *dev)
> {
> struct atmel_serial_priv *priv = dev_get_priv(dev);
> @@ -245,6 +256,7 @@ static int atmel_serial_enable_clk(struct udevice *dev)
>
> return 0;
> }
> +#endif
>
> static int atmel_serial_probe(struct udevice *dev)
> {
>
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