linux-kernel - [PATCH] misc: rtsx: Improve compatibility for rts5261

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Date:   Wed, 15 Apr 2020 10:37:17 +0800
From:   <rui_feng@...lsil.com.cn>
To:     <arnd@...db.de>, <gregkh@...uxfoundation.org>
CC:     <linux-kernel@...r.kernel.org>, Rui Feng <rui_feng@...lsil.com.cn>
Subject: [PATCH] misc: rtsx: Improve compatibility for rts5261

From: Rui Feng <rui_feng@...lsil.com.cn>

Change initial clock to improve compatibility for rts5261

Signed-off-by: Rui Feng <rui_feng@...lsil.com.cn>
---
 drivers/misc/cardreader/rts5261.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/cardreader/rts5261.c b/drivers/misc/cardreader/rts5261.c
index bc4967a6efa1..547db5ffd3f6 100644
--- a/drivers/misc/cardreader/rts5261.c
+++ b/drivers/misc/cardreader/rts5261.c
@@ -639,8 +639,13 @@ int rts5261_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
 
 	if (initial_mode) {
 		/* We use 250k(around) here, in initial stage */
-		clk_divider = SD_CLK_DIVIDE_128;
-		card_clock = 30000000;
+		if (is_version(pcr, PID_5261, IC_VER_D)) {
+			clk_divider = SD_CLK_DIVIDE_256;
+			card_clock = 60000000;
+		} else {
+			clk_divider = SD_CLK_DIVIDE_128;
+			card_clock = 30000000;
+		}
 	} else {
 		clk_divider = SD_CLK_DIVIDE_0;
 	}
-- 
2.17.1