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SubjectRe: [PATCH v2 7/9] spi: spi-s3c64xx: Ensure cur_speed holds actual clock value
On Fri, Aug 21, 2020 at 06:13:59PM +0200, Łukasz Stelmach wrote:
> cur_speed is used to calculate transfer timeout and needs to be
> set to the actual value of (half) the clock speed for precise
> calculations.

If you need this only for timeout calculation just divide it in
s3c64xx_wait_for_dma(). Otherwise why only if (cmu) case is updated?

You are also affecting here not only timeout but
s3c64xx_enable_datapath() which is not mentioned in commit log. In other
words, this looks wrong.

Best regards,
Krzysztof

>
> Cc: Tomasz Figa <tfiga@chromium.org>
> Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
> ---
> drivers/spi/spi-s3c64xx.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
> index 02de734b8ab1..89c162efe355 100644
> --- a/drivers/spi/spi-s3c64xx.c
> +++ b/drivers/spi/spi-s3c64xx.c
> @@ -626,6 +626,7 @@ static int s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
> ret = clk_set_rate(sdd->src_clk, sdd->cur_speed * 2);
> if (ret)
> return ret;
> + sdd->cur_speed = clk_get_rate(sdd->src_clk) / 2;
> } else {
> /* Configure Clock */
> val = readl(regs + S3C64XX_SPI_CLK_CFG);
> --
> 2.26.2
>

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