arm:board:trats2:FIX: Clear INFORM4 and INFORM5 registers at correct boot

During switch to device tree, commit 1ecab0f has removed this code. INFORM4 and INFORM5 registers are used by TRATS2 first stage bootloader for providing recovery. For normal operation, those two must be cleared out. This error emerges when one force reset from u-boot's command line for three times. Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Cc: Minkyu Kang <mk7.kang@samsung.com> Acked-by: Minkyu Kang <mk7.kang@samsung.com>

arm:board:trats2:FIX: Clear INFORM4 and INFORM5 registers at correct boot
During switch to device tree, commit 1ecab0f has removed this code. INFORM4 and INFORM5 registers are used by TRATS2 first stage bootloader for providing recovery. For normal operation, those two must be cleared out. This error emerges when one force reset from u-boot's command line for three times. Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Cc: Minkyu Kang <mk7.kang@samsung.com> Acked-by: Minkyu Kang <mk7.kang@samsung.com>
Łukasz Majewski · Tom Rini
1 parent 395e60cdc2
Showing 1 changed file with 13 additions and 0 deletions Side-by-side Diff
board/samsung/trats2/trats2.c
@@ -150,8 +150,21 @@
  
 int exynos_init(void)
 {
+	struct exynos4_power *pwr =
+		(struct exynos4_power *)samsung_get_base_power();
+
 	check_hw_revision();
 	printf("HW Revision:\t0x%04x\n", board_rev);
+
+	/*
+	 * First bootloader on the TRATS2 platform uses
+	 * INFORM4 and INFORM5 registers for recovery
+	 *
+	 * To indicate correct boot chain - those two
+	 * registers must be cleared out
+	 */
+	writel(0, &pwr->inform4);
+	writel(0, &pwr->inform5);
  
 	return 0;
 }
...	...	@@ -150,8 +150,21 @@
150	150
151	151	int exynos_init(void)
152	152	{
	153	+ struct exynos4_power *pwr =
	154	+ (struct exynos4_power *)samsung_get_base_power();
	155	+
153	156	check_hw_revision();
154	157	printf("HW Revision:\t0x%04x\n", board_rev);
	158	+
	159	+ /*
	160	+ * First bootloader on the TRATS2 platform uses
	161	+ * INFORM4 and INFORM5 registers for recovery
	162	+ *
	163	+ * To indicate correct boot chain - those two
	164	+ * registers must be cleared out
	165	+ */
	166	+ writel(0, &pwr->inform4);
	167	+ writel(0, &pwr->inform5);
155	168
156	169	return 0;
157	170	}