linux-kernel - [PATCH 3.12 62/77] clk: samsung: exynos5250: Add CLK_IGNORE

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Message-Id: <20140114002754.261397312@linuxfoundation.org>
Date:	Mon, 13 Jan 2014 16:28:23 -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, Abhilash Kesavan <a.kesavan@...sung.com>,
	Mike Turquette <mturquette@...aro.org>,
	Tomasz Figa <t.figa@...sung.com>
Subject: [PATCH 3.12 62/77] clk: samsung: exynos5250: Add CLK_IGNORE_UNUSED flag for the sysreg clock

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

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

From: Abhilash Kesavan <a.kesavan@...sung.com>

commit 2feed5aecf5f367b92bd6b6e92afe9e3de466907 upstream.

The sysreg (system register) generates control signals for various blocks
like disp1blk, i2c, mipi, usb etc. However, it gets disabled as an unused
clock at boot-up. This can lead to failures in operation of above blocks,
because they can not be configured properly if this clock is disabled.

Signed-off-by: Abhilash Kesavan <a.kesavan@...sung.com>
Acked-by: Mike Turquette <mturquette@...aro.org>
[t.figa: Updated patch description.]
Signed-off-by: Tomasz Figa <t.figa@...sung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/clk/samsung/clk-exynos5250.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/clk/samsung/clk-exynos5250.c
+++ b/drivers/clk/samsung/clk-exynos5250.c
@@ -407,7 +407,8 @@ static struct samsung_gate_clock exynos5
 	GATE(hsi2c2, "hsi2c2", "aclk66", GATE_IP_PERIC, 30, 0, 0),
 	GATE(hsi2c3, "hsi2c3", "aclk66", GATE_IP_PERIC, 31, 0, 0),
 	GATE(chipid, "chipid", "aclk66", GATE_IP_PERIS, 0, 0, 0),
-	GATE(sysreg, "sysreg", "aclk66", GATE_IP_PERIS, 1, 0, 0),
+	GATE(sysreg, "sysreg", "aclk66",
+			GATE_IP_PERIS, 1, CLK_IGNORE_UNUSED, 0),
 	GATE(pmu, "pmu", "aclk66", GATE_IP_PERIS, 2, CLK_IGNORE_UNUSED, 0),
 	GATE(tzpc0, "tzpc0", "aclk66", GATE_IP_PERIS, 6, 0, 0),
 	GATE(tzpc1, "tzpc1", "aclk66", GATE_IP_PERIS, 7, 0, 0),


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