From: Mason Zhang <Mason.Zhang@mediatek.com>
To: Chaotian Jing <chaotian.jing@mediatek.com>,
Ulf Hansson <ulf.hansson@linaro.org>,
Matthias Brugger <matthias.bgg@gmail.com>
Cc: <linux-mmc@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <wsd_upstream@mediatek.com>,
Mason Zhang <Mason.Zhang@mediatek.com>
Subject: [PATCH 1/1] mmc: mediatek: fixed clk contrl flow
Date: Mon, 16 Aug 2021 15:38:14 +0800 [thread overview]
Message-ID: <20210816073813.11715-1-Mason.Zhang@mediatek.com> (raw)
this patch fixed clk contrl flow in set clk rate, no need close clk src,
gate cg is enough, so no need call clk prepare/unprepare.
Signed-off-by: Mason Zhang <Mason.Zhang@mediatek.com>
---
drivers/mmc/host/mtk-sd.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 4dfc246c5f95..d9835b272c1f 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -895,9 +895,9 @@ static void msdc_set_mclk(struct msdc_host *host, unsigned char timing, u32 hz)
* So if want to only gate src_clk, need gate its parent(mux).
*/
if (host->src_clk_cg)
- clk_disable_unprepare(host->src_clk_cg);
+ clk_disable(host->src_clk_cg);
else
- clk_disable_unprepare(clk_get_parent(host->src_clk));
+ clk_disable(clk_get_parent(host->src_clk));
if (host->dev_comp->clk_div_bits == 8)
sdr_set_field(host->base + MSDC_CFG,
MSDC_CFG_CKMOD | MSDC_CFG_CKDIV,
@@ -907,9 +907,9 @@ static void msdc_set_mclk(struct msdc_host *host, unsigned char timing, u32 hz)
MSDC_CFG_CKMOD_EXTRA | MSDC_CFG_CKDIV_EXTRA,
(mode << 12) | div);
if (host->src_clk_cg)
- clk_prepare_enable(host->src_clk_cg);
+ clk_enable(host->src_clk_cg);
else
- clk_prepare_enable(clk_get_parent(host->src_clk));
+ clk_enable(clk_get_parent(host->src_clk));
while (!(readl(host->base + MSDC_CFG) & MSDC_CFG_CKSTB))
cpu_relax();
--
2.18.0
next reply other threads:[~2021-08-16 7:39 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-16 7:38 Mason Zhang [this message]
2021-08-24 13:15 ` [PATCH 1/1] mmc: mediatek: fixed clk contrl flow Ulf Hansson
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