linux-kernel - [PATCH] clk: samsung: Add CLK_IGNORE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-id: <1368203889-12547-1-git-send-email-s.nawrocki@samsung.com>
Date:	Fri, 10 May 2013 18:38:09 +0200
From:	Sylwester Nawrocki <s.nawrocki@...sung.com>
To:	mturquette@...aro.org
Cc:	kyungmin.park@...sung.com, kgene.kim@...sung.com,
	inki.dae@...sung.com, linux-samsung-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Sylwester Nawrocki <s.nawrocki@...sung.com>
Subject: [PATCH] clk: samsung: Add CLK_IGNORE_UNUSED flag for the sysreg clocks

Currently no driver *) handles the sysreg clock, with an assumption
that this clock is always left in its default state (enabled).

Before commit 6e6aac7590f902d14d90bace3fd499
ARM: EXYNOS: Migrate clock support to common clock framework

the sysreg clock was not even defined and hence wasn't handled
explicitly in the kernel.

To restore the previous behaviour disable masking the sysreg clock
off in the clock core by default.

*) Except the Exynos4x12 FIMC-IS driver, which will be modified
   to not touch the sysreg clock.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@...sung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
---
 drivers/clk/samsung/clk-exynos4.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/samsung/clk-exynos4.c b/drivers/clk/samsung/clk-exynos4.c
index 070bbeb..0f2f5e5 100644
--- a/drivers/clk/samsung/clk-exynos4.c
+++ b/drivers/clk/samsung/clk-exynos4.c
@@ -797,7 +797,8 @@ struct samsung_gate_clock exynos4210_gate_clks[] __initdata = {
 	GATE(smmu_pcie, "smmu_pcie", "aclk133", GATE_IP_FSYS, 18, 0, 0),
 	GATE(modemif, "modemif", "aclk100", GATE_IP_PERIL, 28, 0, 0),
 	GATE(chipid, "chipid", "aclk100", E4210_GATE_IP_PERIR, 0, 0, 0),
-	GATE(sysreg, "sysreg", "aclk100", E4210_GATE_IP_PERIR, 0, 0, 0),
+	GATE(sysreg, "sysreg", "aclk100", E4210_GATE_IP_PERIR, 0,
+			CLK_IGNORE_UNUSED, 0),
 	GATE(hdmi_cec, "hdmi_cec", "aclk100", E4210_GATE_IP_PERIR, 11, 0, 0),
 	GATE(smmu_rotator, "smmu_rotator", "aclk200",
 			E4210_GATE_IP_IMAGE, 4, 0, 0),
@@ -826,7 +827,8 @@ struct samsung_gate_clock exynos4x12_gate_clks[] __initdata = {
 	GATE(smmu_mdma, "smmu_mdma", "aclk200", E4X12_GATE_IP_IMAGE, 5, 0, 0),
 	GATE(mipi_hsi, "mipi_hsi", "aclk133", GATE_IP_FSYS, 10, 0, 0),
 	GATE(chipid, "chipid", "aclk100", E4X12_GATE_IP_PERIR, 0, 0, 0),
-	GATE(sysreg, "sysreg", "aclk100", E4X12_GATE_IP_PERIR, 1, 0, 0),
+	GATE(sysreg, "sysreg", "aclk100", E4X12_GATE_IP_PERIR, 1,
+			CLK_IGNORE_UNUSED, 0),
 	GATE(hdmi_cec, "hdmi_cec", "aclk100", E4X12_GATE_IP_PERIR, 11, 0, 0),
 	GATE(sclk_mdnie0, "sclk_mdnie0", "div_mdnie0",
 			SRC_MASK_LCD0, 4, CLK_SET_RATE_PARENT, 0),
--
1.7.9.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/