linux-kernel - [PATCH 3.19 089/175] ARM: DRA7: hwmod: Fix boot crash with DEBUG

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Date:	Tue,  3 Mar 2015 22:14:27 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Felipe Balbi <balbi@...com>,
	Lokesh Vutla <lokeshvutla@...com>,
	Paul Walmsley <paul@...an.com>
Subject: [PATCH 3.19 089/175] ARM: DRA7: hwmod: Fix boot crash with DEBUG_LL enabled on UART3

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

------------------

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

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: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/arm/mach-omap2/omap_hwmod_7xx_data.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm/mach-omap2/omap_hwmod_7xx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_7xx_data.c
@@ -2017,7 +2017,7 @@ static struct omap_hwmod dra7xx_uart3_hw
 	.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,


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