diff options
| author |   Jon Hunter <jonathanh@nvidia.com> | 2017-03-27 12:01:05 +0100 |
|---|---|---|
| committer |   Thierry Reding <treding@nvidia.com> | 2017-04-04 16:06:05 +0200 |
| commit | 1116d5a7aff205b6d9879a6458788cac20d0cdf3 (patch) | |
| tree | e8e46d7552b6e3daa969acc4060a7b52c6c96d23 /drivers/clk/tegra/clk-tegra210.c | |
| parent | clk: tegra: Add missing Tegra210 clocks (diff) | |
| download | wireguard-linux-1116d5a7aff205b6d9879a6458788cac20d0cdf3.tar.xz wireguard-linux-1116d5a7aff205b6d9879a6458788cac20d0cdf3.zip | |
clk: tegra: Don't reset PLL-CX if it is already enabled
Commit 8dce89a1c2cf ("clk: tegra: Don't warn for PLL defaults
unnecessarily") changed the tegra210_pllcx_set_defaults() function
causing the PLL to always be reset regardless of whether it is in-use.
This function was changed so that resetting of the PLL will only be
skipped if the PLL is enabled AND 'pllcx->params->defaults_set' is not
true. However, the 'pllcx->params->defaults_set' is always true and
hence, the PLL is now always reset. This causes the boot to fail on the
Tegra210 Smaug where the PLL is already enabled and in-use. Fix this by
only resetting the PLL if not in-use and only printing the warning that
the defaults are not set after we have checked the default settings.
Fixes: 8dce89a1c2cf ("clk: tegra: Don't warn for PLL defaults unnecessarily")
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/clk/tegra/clk-tegra210.c')
| -rw-r--r-- | drivers/clk/tegra/clk-tegra210.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/clk/tegra/clk-tegra210.c b/drivers/clk/tegra/clk-tegra210.c index cdf1101c40f8..1024e853ea65 100644 --- a/drivers/clk/tegra/clk-tegra210.c +++ b/drivers/clk/tegra/clk-tegra210.c @@ -555,12 +555,12 @@ static void tegra210_pllcx_set_defaults(const char *name, { pllcx->params->defaults_set = true; - if (readl_relaxed(clk_base + pllcx->params->base_reg) & - PLL_ENABLE && !pllcx->params->defaults_set) { + if (readl_relaxed(clk_base + pllcx->params->base_reg) & PLL_ENABLE) { /* PLL is ON: only check if defaults already set */ pllcx_check_defaults(pllcx->params); - pr_warn("%s already enabled. Postponing set full defaults\n", - name); + if (!pllcx->params->defaults_set) + pr_warn("%s already enabled. Postponing set full defaults\n", + name); return; } |