clk: tegra: Always program PLL_E when enabled

[ Upstream commit 5105660ee80862b85f7769626d0f936c18ce1885 ]

Commit bff1cef5f23a ("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: bff1cef5f23a ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/clk/tegra/clk-pll.c b/drivers/clk/tegra/clk-pll.c
index 0b212cf2e7942126243eee266bf542525853e2d8..1cc982d3de635d9aadd36eb447321980cd349e4f 100644 (file)
--- a/drivers/clk/tegra/clk-pll.c
+++ b/drivers/clk/tegra/clk-pll.c
@@ -1601,9 +1601,6 @@ static int clk_plle_tegra114_enable(struct clk_hw *hw)
        unsigned long flags = 0;
        unsigned long input_rate;
 
-       if (clk_pll_is_enabled(hw))
-               return 0;
-
        input_rate = clk_hw_get_rate(clk_hw_get_parent(hw));
 
        if (_get_table_rate(hw, &sel, pll->params->fixed_rate, input_rate))