lkml.org 
[lkml]   [2017]   [Jan]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 2/2] mmc: mediatek: correct the implementation of msdc_card_busy
Date
From: yong mao <yong.mao@mediatek.com>

msdc_card_busy only need check if the data0 is low.
In sdio data1 irq mode, data1 may be low because of interruption.

Signed-off-by: Yong Mao <yong.mao@mediatek.com>
Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
---
drivers/mmc/host/mtk-sd.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 10ef2ae..80ba034 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -1074,11 +1074,8 @@ static int msdc_card_busy(struct mmc_host *mmc)
struct msdc_host *host = mmc_priv(mmc);
u32 status = readl(host->base + MSDC_PS);

- /* check if any pin between dat[0:3] is low */
- if (((status >> 16) & 0xf) != 0xf)
- return 1;
-
- return 0;
+ /* only check if data0 is low */
+ return !(status & BIT(16));
}

static void msdc_request_timeout(struct work_struct *work)
--
1.7.9.5
\
 
 \ /
  Last update: 2017-01-03 09:51    [W:0.057 / U:0.112 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site