Commit 3aef4632 authored by Matthias Seidel's avatar Matthias Seidel Committed by Mark Brown
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spi: dw: round up result of calculation for clock divider 



Avoid ending up with a higher frequency than requested

Signed-off-by: default avatarMatthias Seidel <kernel@mseidel.net>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 13b10301

drivers/spi/spi-dw.c

+1 −1
Original line number Diff line number Diff line
@@ -300,7 +300,7 @@ static int dw_spi_transfer_one(struct spi_master *master, 
	if (transfer->speed_hz != dws->current_freq) {

		if (transfer->speed_hz != chip->speed_hz) {

			/* clk_div doesn't support odd number */

			chip->clk_div = (dws->max_freq / transfer->speed_hz + 1) & 0xfffe;

			chip->clk_div = (DIV_ROUND_UP(dws->max_freq, transfer->speed_hz) + 1) & 0xfffe;

			chip->speed_hz = transfer->speed_hz;

		}

		dws->current_freq = transfer->speed_hz;