linux-kernel - [PATCH 4.2 243/258] clk: ti: fix dual-registration of uart4

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Message-Id: <20151018014741.470565271@linuxfoundation.org>
Date:	Sat, 17 Oct 2015 18:59:16 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, mturquette@...libre.com,
	sboyd@...eaurora.org, linux-clk@...r.kernel.org,
	linux-omap@...r.kernel.org, linux-kernel@...ts.codethink.co.uk,
	Ben Dooks <ben.dooks@...ethink.co.uk>,
	Tero Kristo <t-kristo@...com>
Subject: [PATCH 4.2 243/258] clk: ti: fix dual-registration of uart4_ick

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

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

From: Ben Dooks <ben.dooks@...ethink.co.uk>

commit 19e79687de22f23bcfb5e79cce3daba20af228d1 upstream.

On the OMAP AM3517 platform the uart4_ick gets registered
twice, causing any power management to /dev/ttyO3 to fail
when trying to wake the device up.

This solves the following oops:

[] Unhandled fault: external abort on non-linefetch (0x1028) at 0xfa09e008
[] PC is at serial_omap_pm+0x48/0x15c
[] LR is at _raw_spin_unlock_irqrestore+0x30/0x5c

Fixes: aafd900cab87 ("CLK: TI: add omap3 clock init file")
Cc: mturquette@...libre.com
Cc: sboyd@...eaurora.org
Cc: linux-clk@...r.kernel.org
Cc: linux-omap@...r.kernel.org
Cc: linux-kernel@...ts.codethink.co.uk
Signed-off-by: Ben Dooks <ben.dooks@...ethink.co.uk>
Signed-off-by: Tero Kristo <t-kristo@...com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/clk/ti/clk-3xxx.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/clk/ti/clk-3xxx.c
+++ b/drivers/clk/ti/clk-3xxx.c
@@ -163,7 +163,6 @@ static struct ti_dt_clk omap3xxx_clks[]
 	DT_CLK(NULL, "gpio2_ick", "gpio2_ick"),
 	DT_CLK(NULL, "wdt3_ick", "wdt3_ick"),
 	DT_CLK(NULL, "uart3_ick", "uart3_ick"),
-	DT_CLK(NULL, "uart4_ick", "uart4_ick"),
 	DT_CLK(NULL, "gpt9_ick", "gpt9_ick"),
 	DT_CLK(NULL, "gpt8_ick", "gpt8_ick"),
 	DT_CLK(NULL, "gpt7_ick", "gpt7_ick"),
@@ -308,6 +307,7 @@ static struct ti_dt_clk am35xx_clks[] =
 static struct ti_dt_clk omap36xx_clks[] = {
 	DT_CLK(NULL, "omap_192m_alwon_fck", "omap_192m_alwon_fck"),
 	DT_CLK(NULL, "uart4_fck", "uart4_fck"),
+	DT_CLK(NULL, "uart4_ick", "uart4_ick"),
 	{ .node_name = NULL },
 };
 


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