linux-kernel - [PATCH 3.12 026/175] ARM: DRA7: hwmod: Fix boot crash with DEBUG

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Message-Id: <bb401d9bb4959a88f3bbb4861fdadc7939cf4eeb.1426581621.git.jslaby@suse.cz>
Date:	Tue, 17 Mar 2015 09:40:04 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Lokesh Vutla <lokeshvutla@...com>,
	Paul Walmsley <paul@...an.com>, Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 026/175] ARM: DRA7: hwmod: Fix boot crash with DEBUG_LL enabled on UART3

From: Lokesh Vutla <lokeshvutla@...com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 1c7e36bfc3e2fb2df5e2d1989a4b6fb9055a0f9b upstream.

With commit '7dedd34: ARM: OMAP2+: hwmod: Fix a crash in _setup_reset()
with DEBUG_LL' we moved from parsing cmdline to identify uart used
for earlycon to using the requsite hwmod CONFIG_DEBUG_OMAPxUARTy FLAGS.

On DRA7 UART3 hwmod doesn't have this flag enabled, and atleast on
BeagleBoard-X15, where we use UART3 for console, boot fails with
DEBUG_LL enabled. Enable DEBUG_OMAP4UART3_FLAGS for UART3 hwmod.

For using DEBUG_LL, enable CONFIG_DEBUG_OMAP4UART3 in menuconfig.

Fixes: 90020c7b2c5e ("ARM: OMAP: DRA7: hwmod: Create initial DRA7XX SoC data")
Reviewed-by: Felipe Balbi <balbi@...com>
Acked-by: Felipe Balbi <balbi@...com>
Signed-off-by: Lokesh Vutla <lokeshvutla@...com>
Signed-off-by: Paul Walmsley <paul@...an.com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 arch/arm/mach-omap2/omap_hwmod_7xx_data.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-omap2/omap_hwmod_7xx_data.c b/arch/arm/mach-omap2/omap_hwmod_7xx_data.c
index 18f333c440db..3d41b06a9926 100644
--- a/arch/arm/mach-omap2/omap_hwmod_7xx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_7xx_data.c
@@ -1669,7 +1669,7 @@ static struct omap_hwmod dra7xx_uart3_hwmod = {
 	.class		= &dra7xx_uart_hwmod_class,
 	.clkdm_name	= "l4per_clkdm",
 	.main_clk	= "uart3_gfclk_mux",
-	.flags		= HWMOD_SWSUP_SIDLE_ACT,
+	.flags		= HWMOD_SWSUP_SIDLE_ACT | DEBUG_OMAP4UART3_FLAGS,
 	.prcm = {
 		.omap4 = {
 			.clkctrl_offs = DRA7XX_CM_L4PER_UART3_CLKCTRL_OFFSET,
-- 
2.3.0

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