From: Niklas Söderlund Date: Thu, 29 Nov 2018 00:39:48 +0000 (+0100) Subject: clk: renesas: rcar-gen3: Add documentation for SD clocks X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e2f4dd1f5b51b4dab813aa6e4db44e87aa750393;p=linux.git clk: renesas: rcar-gen3: Add documentation for SD clocks Document the known use cases of the different clock settings. This is useful as different SoC and ES versions use different settings to do the same thing as there is more than one combination to achieve the same SDn clock speed. Signed-off-by: Niklas Söderlund Reviewed-by: Wolfram Sang Signed-off-by: Geert Uytterhoeven --- diff --git a/drivers/clk/renesas/rcar-gen3-cpg.c b/drivers/clk/renesas/rcar-gen3-cpg.c index 6033bacd25f6f..7782ec198df28 100644 --- a/drivers/clk/renesas/rcar-gen3-cpg.c +++ b/drivers/clk/renesas/rcar-gen3-cpg.c @@ -232,13 +232,13 @@ struct sd_clock { * sd_srcfc sd_fc div * stp_hck stp_ck (div) (div) = sd_srcfc x sd_fc *------------------------------------------------------------------- - * 0 0 0 (1) 1 (4) 4 - * 0 0 1 (2) 1 (4) 8 - * 1 0 2 (4) 1 (4) 16 - * 1 0 3 (8) 1 (4) 32 + * 0 0 0 (1) 1 (4) 4 : SDR104 / HS200 / HS400 (8 TAP) + * 0 0 1 (2) 1 (4) 8 : SDR50 + * 1 0 2 (4) 1 (4) 16 : HS / SDR25 + * 1 0 3 (8) 1 (4) 32 : NS / SDR12 * 1 0 4 (16) 1 (4) 64 * 0 0 0 (1) 0 (2) 2 - * 0 0 1 (2) 0 (2) 4 + * 0 0 1 (2) 0 (2) 4 : SDR104 / HS200 / HS400 (4 TAP) * 1 0 2 (4) 0 (2) 8 * 1 0 3 (8) 0 (2) 16 * 1 0 4 (16) 0 (2) 32