linux-kernel - [PATCH] N900: fix operation on emulator

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Message-ID: <20130701140315.GA15318@amd.pavel.ucw.cz>
Date:	Mon, 1 Jul 2013 16:03:20 +0200
From:	Pavel Machek <pavel@....cz>
To:	Tony Lindgren <tony@...mide.com>
Cc:	Aaro Koskinen <aaro.koskinen@....fi>, pali.rohar@...il.com,
	kernel list <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-omap@...r.kernel.org
Subject: [PATCH] N900: fix operation on emulator

Errata workarounds for N900 hardware actually break operation on
emulator. Fix it.

This approach was suggested by Pali Rohár <pali.rohar@...il.com>
(thanks!).

(Also explain what "sleep_ind" led actually does).

Signed-off-by: Pavel Machek <pavel@....cz>

diff --git a/arch/arm/mach-omap2/board-rx51.c b/arch/arm/mach-omap2/board-rx51.c
index 74f83a5..81f7b9f 100644
--- a/arch/arm/mach-omap2/board-rx51.c
+++ b/arch/arm/mach-omap2/board-rx51.c
@@ -33,9 +33,12 @@
 #include "pm.h"
 #include "sdram-nokia.h"
 #include "board-rx51-secure.h"
+#include "soc.h"
 
 #define RX51_GPIO_SLEEP_IND 162
 
+/* This lights up left part of keyboard */
+
 static struct gpio_led gpio_leds[] = {
 	{
 		.name	= "sleep_ind",
@@ -107,9 +110,11 @@ static void __init rx51_init(void)
 	rx51_camera_init();
 
 #ifdef CONFIG_ARM_ERRATA_430973
-	printk(KERN_INFO "RX-51: Enabling ARM errata 430973 workaround.\n");
-	/* set IBE to 1 */
-	rx51_secure_update_aux_cr(1 << 6, 0);
+	if (omap_type() == OMAP2_DEVICE_TYPE_SEC) {
+		printk(KERN_INFO "RX-51: Enabling ARM errata 430973 workaround.\n");
+		/* set IBE to 1 */
+		rx51_secure_update_aux_cr(1 << 6, 0);
+	}
 #endif
 
 	/* Ensure SDRC pins are mux'd for self-refresh */

-- 
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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