diff mbox series

[5.4,37/57] clk: tegra: Always program PLL_E when enabled

Message ID 20201005142111.597852299@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH Oct. 5, 2020, 3:26 p.m. UTC 
From: Thierry Reding <treding@nvidia.com>

[ 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>
---
 drivers/clk/tegra/clk-pll.c | 3 ---
 1 file changed, 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/clk/tegra/clk-pll.c b/drivers/clk/tegra/clk-pll.c
index 1583f5fc992f3..80f640d9ea71c 100644
--- a/drivers/clk/tegra/clk-pll.c
+++ b/drivers/clk/tegra/clk-pll.c
@@ -1569,9 +1569,6 @@  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))