diff options
| author | Kever Yang <kever.yang@rock-chips.com> | 2017-07-27 12:54:01 +0800 |
|---|---|---|
| committer | Philipp Tomsich <philipp.tomsich@theobroma-systems.com> | 2017-08-13 17:15:09 +0200 |
| commit | 3a94d75d0e2a3b2519de51dfa1f369d976d9cccc (patch) | |
| tree | 97eceee91df5dd3414f899062ec64041bf7257ed /drivers/clk/rockchip/clk_rk3188.c | |
| parent | 95ca100ba740283e00f0b5354be8ccb04b97cbf9 (diff) | |
rockchip: clk: update dwmmc clock div
dwmmc controller has default internal divider by 2,
and we always provide double of the clock rate request by
dwmmc controller. Sync code for all Rockchip SoC with:
4055b46 rockchip: clk: rk3288: fix mmc clock setting
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
[fixup for 'missing DIV_ROUND_UP' conflict for clk_rk3288.c:]
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Diffstat (limited to 'drivers/clk/rockchip/clk_rk3188.c')
| -rw-r--r-- | drivers/clk/rockchip/clk_rk3188.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/clk/rockchip/clk_rk3188.c b/drivers/clk/rockchip/clk_rk3188.c index 6f30332878..cbf31d7de1 100644 --- a/drivers/clk/rockchip/clk_rk3188.c +++ b/drivers/clk/rockchip/clk_rk3188.c @@ -287,7 +287,7 @@ static ulong rockchip_mmc_get_clk(struct rk3188_cru *cru, uint gclk_rate, return -EINVAL; } - return DIV_TO_RATE(gclk_rate, div); + return DIV_TO_RATE(gclk_rate, div) / 2; } static ulong rockchip_mmc_set_clk(struct rk3188_cru *cru, uint gclk_rate, @@ -296,7 +296,8 @@ static ulong rockchip_mmc_set_clk(struct rk3188_cru *cru, uint gclk_rate, int src_clk_div; debug("%s: gclk_rate=%u\n", __func__, gclk_rate); - src_clk_div = RATE_TO_DIV(gclk_rate, freq); + /* mmc clock defaulg div 2 internal, need provide double in cru */ + src_clk_div = DIV_ROUND_UP(gclk_rate / 2, freq); assert(src_clk_div <= 0x3f); switch (periph) { |