Unverified Commit 20b4016a authored Oct 02, 2020 by Łukasz Stelmach Committed by Mark Brown Oct 02, 2020

spi: spi-s3c64xx: Ensure cur_speed holds actual clock value



Make sure the cur_speed value used in s3c64xx_enable_datapath()
to configure DMA channel and in s3c64xx_wait_for_*() to calculate the
transfer timeout is set to the actual value of (half) the clock speed.

Don't change non-CMU case, because no frequency calculation errors have
been reported.

Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Suggested-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
Link: https://lore.kernel.org/r/20201002122243.26849-8-l.stelmach@samsung.com


Signed-off-by: Mark Brown <broonie@kernel.org>

parent 58d54781

drivers/spi/spi-s3c64xx.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -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);

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