linux-kernel - [PATCH 8/8] misc: rtsx: Fix clock timing for RTS5261

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Message-ID: <1604397321-3026-1-git-send-email-rui_feng@realsil.com.cn>
Date:   Tue, 3 Nov 2020 17:55:21 +0800
From:   <rui_feng@...lsil.com.cn>
To:     <arnd@...db.de>, <gregkh@...uxfoundation.org>,
        <ulf.hansson@...aro.org>
CC:     <linux-kernel@...r.kernel.org>, <linux-mmc@...r.kernel.org>,
        Rui Feng <rui_feng@...lsil.com.cn>
Subject: [PATCH 8/8] misc: rtsx: Fix clock timing for RTS5261

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

This patch fix clock timing for RTS5261, using 256 divide
for the version higher than version C.

Signed-off-by: Rui Feng <rui_feng@...lsil.com.cn>
---
 drivers/misc/cardreader/rts5261.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/cardreader/rts5261.c b/drivers/misc/cardreader/rts5261.c
index 2ada973a0f33..6c64dade8e1a 100644
--- a/drivers/misc/cardreader/rts5261.c
+++ b/drivers/misc/cardreader/rts5261.c
@@ -649,7 +649,7 @@ int rts5261_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
 
 	if (initial_mode) {
 		/* We use 250k(around) here, in initial stage */
-		if (is_version(pcr, PID_5261, IC_VER_D)) {
+		if (is_version_higher_than(pcr, PID_5261, IC_VER_C)) {
 			clk_divider = SD_CLK_DIVIDE_256;
 			card_clock = 60000000;
 		} else {
@@ -700,7 +700,7 @@ int rts5261_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
 		div++;
 	}
 
-	n = (n / 2);
+	n = (n / 2) - 1;
 	pcr_dbg(pcr, "n = %d, div = %d\n", n, div);
 
 	ssc_depth = depth[ssc_depth];
-- 
2.17.1