From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Peter De Schrijver To: Peter De Schrijver , Prashant Gaikwad , Michael Turquette , "Stephen Boyd" , Stephen Warren , "Thierry Reding" , Alexandre Courbot , , , Subject: [PATCH] clk: tegra: fix disable unused for clocks sharing enable bit Date: Thu, 2 Mar 2017 15:22:05 +0200 Message-ID: <1488460925-16793-1-git-send-email-pdeschrijver@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain Return-Path: pdeschrijver@nvidia.com List-ID: In case 2 clocks share an enable bit and one of them is enabled by a driver and the other one is not, CCF will think it's enabled because it will only look at the hw state. Therefor it will disable the clock and thus also disable the other clock which was enabled. Solve this by reading the initial state of the enable bit and incrementing the refcount if it's set. Signed-off-by: Peter De Schrijver --- drivers/clk/tegra/clk-periph-gate.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/clk/tegra/clk-periph-gate.c b/drivers/clk/tegra/clk-periph-gate.c index 8812782..303ef32 100644 --- a/drivers/clk/tegra/clk-periph-gate.c +++ b/drivers/clk/tegra/clk-periph-gate.c @@ -159,6 +159,9 @@ struct clk *tegra_clk_register_periph_gate(const char *name, gate->enable_refcnt = enable_refcnt; gate->regs = pregs; + if (read_enb(gate) & periph_clk_to_bit(gate)) + enable_refcnt[clk_num]++; + /* Data in .init is copied by clk_register(), so stack variable OK */ gate->hw.init = &init; -- 1.9.1