diff mbox series

[4.19.y-cip,03/23] clk: renesas: rcar-gen3: Add documentation for SD clocks

Message ID 1563197408-59548-4-git-send-email-biju.das@bp.renesas.com (mailing list archive)
State Accepted
Headers show
Series Clock enhancements | expand

Commit Message

Biju Das July 15, 2019, 1:29 p.m. UTC 
From: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>

commit e2f4dd1f5b51b4dab813aa6e4db44e87aa750393 upstream.

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 <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/clk/renesas/rcar-gen3-cpg.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/drivers/clk/renesas/rcar-gen3-cpg.c b/drivers/clk/renesas/rcar-gen3-cpg.c
index d6f5bd1..00e41de 100644
--- a/drivers/clk/renesas/rcar-gen3-cpg.c
+++ b/drivers/clk/renesas/rcar-gen3-cpg.c
@@ -235,13 +235,13 @@  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