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Message-Id: <1393605440-14643-2-git-send-email-maxime.ripard@free-electrons.com> Date: Fri, 28 Feb 2014 17:37:16 +0100 From: Maxime Ripard <maxime.ripard@...e-electrons.com> To: Emilio Lopez <emilio@...pez.com.ar>, Dan Williams <dan.j.williams@...el.com>, Vinod Koul <vinod.koul@...el.com> Cc: Mike Turquette <mturquette@...aro.org>, linux-arm-kernel@...ts.infradead.org, dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, linux-sunxi@...glegroups.com, kevin.z.m.zh@...il.com, sunny@...winnertech.com, shuge@...winnertech.com, zhuzhenhua@...winnertech.com, Maxime Ripard <maxime.ripard@...e-electrons.com> Subject: [PATCH v2 1/5] clk: sun6i: Protect CPU clock Right now, AHB is an indirect child clock of the CPU clock. If that happens to change, since the CPU clock has no other consumers declared in Linux, it would be shut down, which is not really a good idea. Prevent this by forcing it enabled. Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com> --- drivers/clk/sunxi/clk-sunxi.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c index 23baad9..f6f61cc 100644 --- a/drivers/clk/sunxi/clk-sunxi.c +++ b/drivers/clk/sunxi/clk-sunxi.c @@ -1301,6 +1301,12 @@ static void __init sunxi_clock_protect(void) clk_prepare_enable(clk); clk_put(clk); } + + /* CPU clocks - sun6i */ + clk = clk_get(NULL, "cpu"); + if (!IS_ERR(clk)) + clk_prepare_enable(clk); + } static void __init sunxi_init_clocks(void) -- 1.9.0 -- 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/
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