clk: tegra: Use readl_relaxed_poll_timeout_atomic() in tegra210_clock_init()
Below is the call trace of tegra210_init_pllu() function: start_kernel() -> time_init() --> of_clk_init() ---> tegra210_clock_init() ----> tegra210_pll_init() -----> tegra210_init_pllu() Because the preemption is disabled in the start_kernel before calling time_init, tegra210_init_pllu is actually in an atomic context while it includes a readl_relaxed_poll_timeout that might sleep. So this patch just changes this readl_relaxed_poll_timeout() to its atomic version. Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com> Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
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@ -2568,8 +2568,8 @@ static int tegra210_enable_pllu(void)
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reg |= PLL_ENABLE;
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writel(reg, clk_base + PLLU_BASE);
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readl_relaxed_poll_timeout(clk_base + PLLU_BASE, reg,
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reg & PLL_BASE_LOCK, 2, 1000);
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readl_relaxed_poll_timeout_atomic(clk_base + PLLU_BASE, reg,
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reg & PLL_BASE_LOCK, 2, 1000);
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if (!(reg & PLL_BASE_LOCK)) {
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pr_err("Timed out waiting for PLL_U to lock\n");
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return -ETIMEDOUT;
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