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clk: tegra: Always program PLL_E when enabled 

Commit bff1cef5f2 ("clk: tegra: Don't enable already enabled PLLs")
added checks to avoid enabling PLLs that have already been enabled by
the bootloader. However, the PLL_E configuration inherited from the
bootloader isn't necessarily the one that is needed for the kernel.

This can cause SATA to fail like this:

    [    5.310270] phy phy-sata.6: phy poweron failed --> -110
    [    5.315604] tegra-ahci 70027000.sata: failed to power on AHCI controller: -110
    [    5.323022] tegra-ahci: probe of 70027000.sata failed with error -110

Fix this by always programming the PLL_E. This ensures that any mis-
configuration by the bootloader will be overwritten by the kernel.

Fixes: bff1cef5f2 ("clk: tegra: Don't enable already enabled PLLs")
Reported-by: LABBE Corentin <clabbe@baylibre.com>
Tested-by: Corentin Labbe <clabbe@baylibre.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2020-06-03 13:13:07 +02:00
parent 6402e780e9
commit 5105660ee8
1 changed files with 0 additions and 3 deletions
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3
drivers/clk/tegra/clk-pll.c
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@ -1611,9 +1611,6 @@ static int clk_plle_tegra114_enable(struct clk_hw *hw)
unsigned long flags = 0; unsigned long flags = 0;
unsigned long input_rate; unsigned long input_rate;
if (clk_pll_is_enabled(hw))
return 0;
input_rate = clk_hw_get_rate(clk_hw_get_parent(hw)); input_rate = clk_hw_get_rate(clk_hw_get_parent(hw));
if (_get_table_rate(hw, &sel, pll->params->fixed_rate, input_rate)) if (_get_table_rate(hw, &sel, pll->params->fixed_rate, input_rate))