linux-kernel - [PATCH 4.2.y-ckt 021/218] clk: rockchip: add hclk_cpubus to the list of rk3188 critical clocks

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Message-Id: <1459455431-12687-22-git-send-email-kamal@canonical.com>
Date:	Thu, 31 Mar 2016 13:13:54 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Alexander Kochetkov <al.kochet@...il.com>,
	Heiko Stuebner <heiko@...ech.de>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 4.2.y-ckt 021/218] clk: rockchip: add hclk_cpubus to the list of rk3188 critical clocks

4.2.8-ckt7 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Alexander Kochetkov <al.kochet@...il.com>

commit e8b63288b37dbb8457b510c9d96f6006da4653f6 upstream.

hclk_cpubus needs to keep running because it is needed for devices like
the rom, i2s0 or spdif to be accessible via cpu. Without that all
accesses to devices (readl/writel) return wrong data. So add it
to the list of critical clocks.

Fixes: 78eaf6095cc763c ("clk: rockchip: disable unused clocks")
Signed-off-by: Alexander Kochetkov <al.kochet@...il.com>
Signed-off-by: Heiko Stuebner <heiko@...ech.de>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/clk/rockchip/clk-rk3188.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clk/rockchip/clk-rk3188.c b/drivers/clk/rockchip/clk-rk3188.c
index de08586..41f7e13 100644
--- a/drivers/clk/rockchip/clk-rk3188.c
+++ b/drivers/clk/rockchip/clk-rk3188.c
@@ -710,6 +710,7 @@ static const char *const rk3188_critical_clocks[] __initconst = {
 	"hclk_peri",
 	"pclk_cpu",
 	"pclk_peri",
+	"hclk_cpubus"
 };
 
 static void __init rk3188_common_clk_init(struct device_node *np)
-- 
2.7.4