linux-kernel - [PATCH v3 2/2] ARM: s3c24xx: Correct SD card write protect detection on Mini2440

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Date:   Fri,  7 Sep 2018 23:54:46 +0200
From:   Cedric Roux <sed@...e.fr>
To:     kgene@...nel.org, krzk@...nel.org, linux@...linux.org.uk,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Cedric Roux <sed@...e.fr>
Subject: [PATCH v3 2/2] ARM: s3c24xx: Correct SD card write protect detection on Mini2440

The mini2440 computer uses "active high" to signal that the "write protect"
of the inserted MMC is set. The current code uses the opposite, leading to
a wrong detection of write protection. The solution is simply to use
".wprotect_invert = 1" in the description of the MMC.

Signed-off-by: Cedric Roux <sed@...e.fr>
---
 arch/arm/mach-s3c24xx/mach-mini2440.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-s3c24xx/mach-mini2440.c b/arch/arm/mach-s3c24xx/mach-mini2440.c
index 4a0bf6abba8c..bfce7971d741 100644
--- a/arch/arm/mach-s3c24xx/mach-mini2440.c
+++ b/arch/arm/mach-s3c24xx/mach-mini2440.c
@@ -234,10 +234,11 @@ static struct s3c2410fb_mach_info mini2440_fb_info __initdata = {
 /* MMC/SD  */
 
 static struct s3c24xx_mci_pdata mini2440_mmc_cfg __initdata = {
-	.gpio_detect   = S3C2410_GPG(8),
-	.gpio_wprotect = S3C2410_GPH(8),
-	.set_power     = NULL,
-	.ocr_avail     = MMC_VDD_32_33|MMC_VDD_33_34,
+	.gpio_detect     = S3C2410_GPG(8),
+	.gpio_wprotect   = S3C2410_GPH(8),
+	.wprotect_invert = 1,
+	.set_power       = NULL,
+	.ocr_avail       = MMC_VDD_32_33|MMC_VDD_33_34,
 };
 
 /* NAND Flash on MINI2440 board */
-- 
2.18.0