On 09/29/2014 05:12 PM, Stephen Boyd wrote:
I'm also auditing clock
drivers to find potential brokenness.
These are places where we re-enter the framework under drivers/clk/. It
looks like sirf can be ported to use determine_rate() and something like
my "safe parent" patch. Tegra is concerning given that they call
clk_get_rate() in atomic context which is bad because that
clk_get_rate() can sleep on the prepare mutex. Otherwise we can probably
just convert that to use the unlocked variants. I'm aware of the qcom
one, maybe we need a framework flag that indicates that all parent
clocks must be enabled to switch this clock's parent. The last one is
versatile which I hope we can convert to use assigned-rates?
drivers/clk/sirf/clk-common.c:409: ret1 = clk_set_parent(hw->clk,
clk_pll1.hw.clk);
drivers/clk/sirf/clk-common.c:414: ret1 = clk_set_parent(hw->clk,
clk_pll2.hw.clk);
drivers/clk/sirf/clk-common.c:419: ret1 = clk_set_parent(hw->clk,
clk_pll3.hw.clk);
drivers/clk/sirf/clk-common.c:427: ret1 = clk_set_parent(hw->clk,
clk_pll2.hw.clk);
drivers/clk/sirf/clk-common.c:433: ret1 = clk_set_parent(hw->clk,
clk_pll1.hw.clk);
drivers/clk/versatile/clk-sp810.c:103: clk_set_parent(hw->clk, new_parent);
drivers/clk/sirf/clk-common.c:431: ret2 =
clk_set_rate(clk_pll1.hw.clk, rate);
drivers/clk/qcom/mmcc-msm8960.c:520: ret =
clk_prepare_enable(clk_get_parent_by_index(clk, i));
drivers/clk/qcom/mmcc-msm8960.c:549:
clk_disable_unprepare(clk_get_parent_by_index(clk, i));
Not necessary? drivers/clk/sirf/clk-common.c:168: struct clk
*parent_clk = clk_get_parent(hw->clk);
Not necessary? drivers/clk/sirf/clk-common.c:169: struct clk
*pll_parent_clk = clk_get_parent(parent_clk);
Not necessary! drivers/clk/sirf/clk-common.c:181: struct clk
*parent_clk = clk_get_parent(hw->clk);
drivers/clk/sirf/clk-common.c:423: cur_parent = clk_get_parent(hw->clk);
drivers/clk/spear/clk-vco-pll.c:90:
__clk_get_rate(__clk_get_parent(__clk_get_parent(hw->clk)));
drivers/clk/tegra/clk-pll.c:732: unsigned long input_rate =
clk_get_rate(clk_get_parent(hw->clk));
drivers/clk/tegra/clk-pll.c:1288: unsigned long input_rate =
clk_get_rate(clk_get_parent(hw->clk));
drivers/clk/versatile/clk-sp810.c:82: struct clk *old_parent =
__clk_get_parent(hw->clk);
drivers/clk/qcom/mmcc-msm8960.c:520: ret =
clk_prepare_enable(clk_get_parent_by_index(clk, i));
drivers/clk/versatile/clk-sp810.c:102: clk_prepare(new_parent);
drivers/clk/versatile/clk-sp810.c:104: clk_unprepare(old_parent);
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