linux-kernel - [PATCH 3.11 017/233] clk: samsung: exynos5250: Add CLK_IGNORE

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Message-Id: <1391773652-25214-18-git-send-email-luis.henriques@canonical.com>
Date:	Fri,  7 Feb 2014 11:43:56 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Abhilash Kesavan <a.kesavan@...sung.com>,
	Tomasz Figa <t.figa@...sung.com>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.11 017/233] clk: samsung: exynos5250: Add CLK_IGNORE_UNUSED flag for the sysreg clock

3.11.10.4 -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: Luis Henriques <luis.henriques@...onical.com>
---
 drivers/clk/samsung/clk-exynos5250.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/samsung/clk-exynos5250.c b/drivers/clk/samsung/clk-exynos5250.c
index 6f767c5..ad9f97b 100644
--- a/drivers/clk/samsung/clk-exynos5250.c
+++ b/drivers/clk/samsung/clk-exynos5250.c
@@ -378,7 +378,8 @@ struct samsung_gate_clock exynos5250_gate_clks[] __initdata = {
 	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),
-- 
1.8.3.2

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