patches.renesas/0146-mmc-sh_mobile_sdhi-improve-prerequisite-for-hw_reset.patch

From c86823eb28834f75c555a0a7262b9676107b9908 Mon Sep 17 00:00:00 2001
From: Wolfram Sang <wsa+renesas@sang-engineering.com>
Date: Mon, 12 Dec 2016 20:51:21 +0100
Subject: [PATCH 146/255] mmc: sh_mobile_sdhi: improve prerequisite for
 hw_reset

We need a SCC unit for hw_reset. Those units can only be described in
of_data. So, of_data and a valid SCC offset are prerequisites for
enabling the hw_reset capability. Merge the two 'if' conditions into one
and add a check for an scc offset.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit 6ade9a2c2da855ff38e74c4298976400feca968e)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
---
 drivers/mmc/host/sh_mobile_sdhi.c |   30 ++++++++++++++----------------
 1 file changed, 14 insertions(+), 16 deletions(-)

--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -666,27 +666,25 @@ static int sh_mobile_sdhi_probe(struct p
 	if (ret < 0)
 		goto efree;
 
-	if (host->mmc->caps & MMC_CAP_UHS_SDR104) {
+	if (of_data && of_data->scc_offset && host->mmc->caps & MMC_CAP_UHS_SDR104) {
+		const struct sh_mobile_sdhi_scc *taps = of_data->taps;
+		bool hit = false;
+
 		host->mmc->caps |= MMC_CAP_HW_RESET;
 
-		if (of_data) {
-			const struct sh_mobile_sdhi_scc *taps = of_data->taps;
-			bool hit = false;
-
-			for (i = 0; i < of_data->taps_num; i++) {
-				if (taps[i].clk_rate == 0 ||
-				    taps[i].clk_rate == host->mmc->f_max) {
-					host->scc_tappos = taps->tap;
-					hit = true;
-					break;
-				}
+		for (i = 0; i < of_data->taps_num; i++) {
+			if (taps[i].clk_rate == 0 ||
+			    taps[i].clk_rate == host->mmc->f_max) {
+				host->scc_tappos = taps->tap;
+				hit = true;
+				break;
 			}
+		}
 
-			if (!hit)
-				dev_warn(&host->pdev->dev, "Unknown clock rate for SDR104\n");
+		if (!hit)
+			dev_warn(&host->pdev->dev, "Unknown clock rate for SDR104\n");
 
-			priv->scc_ctl = host->ctl + of_data->scc_offset;
-		}
+		priv->scc_ctl = host->ctl + of_data->scc_offset;
 	}
 
 	i = 0;