misc: rtsx: Improve compatibility for rts5261

Change initial clock to improve compatibility for rts5261

Signed-off-by: Rui Feng <rui_feng@realsil.com.cn>
Link: https://lore.kernel.org/r/1586918237-3016-1-git-send-email-rui_feng@realsil.com.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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;
 	}