diff options
| author | Andrew Bresticker <abrestic@chromium.org> | 2015-06-19 00:28:37 +0300 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2015-12-17 15:37:57 +0300 |
| commit | afff455cf4f2501d30446eefbfd0aecb14b8a0b8 (patch) | |
| tree | 64ace5de7abeb420e49c91f7d4971b238749ba6d /drivers/clk | |
| parent | 6b301a059eb2ebed1b12a900e3b21a38e48dd410 (diff) | |
| download | linux-afff455cf4f2501d30446eefbfd0aecb14b8a0b8.tar.xz | |
clk: tegra: pll: Fix issues with rates for VCO PLLs
Without this change clk_get_rate would return the final output
rather than the VCO output as it would factor in the pdiv when
it shouldn't. This will cause problems for all dividers in the
subtree of the VCO PLL.
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/clk')
| -rw-r--r-- | drivers/clk/tegra/clk-pll.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/clk/tegra/clk-pll.c b/drivers/clk/tegra/clk-pll.c index d00e3289eb79..731c6857c895 100644 --- a/drivers/clk/tegra/clk-pll.c +++ b/drivers/clk/tegra/clk-pll.c @@ -752,6 +752,8 @@ static int clk_pll_set_rate(struct clk_hw *hw, unsigned long rate, spin_lock_irqsave(pll->lock, flags); _get_pll_mnp(pll, &old_cfg); + if (pll->params->flags & TEGRA_PLL_VCO_OUT) + cfg.p = old_cfg.p; if (old_cfg.m != cfg.m || old_cfg.n != cfg.n || old_cfg.p != cfg.p || old_cfg.sdm_data != cfg.sdm_data) @@ -812,11 +814,15 @@ static unsigned long clk_pll_recalc_rate(struct clk_hw *hw, _get_pll_mnp(pll, &cfg); - pdiv = _hw_to_p_div(hw, cfg.p); - if (pdiv < 0) { - WARN(1, "Clock %s has invalid pdiv value : 0x%x\n", - __clk_get_name(hw->clk), cfg.p); + if (pll->params->flags & TEGRA_PLL_VCO_OUT) { pdiv = 1; + } else { + pdiv = _hw_to_p_div(hw, cfg.p); + if (pdiv < 0) { + WARN(1, "Clock %s has invalid pdiv value : 0x%x\n", + clk_hw_get_name(hw), cfg.p); + pdiv = 1; + } } if (pll->params->set_gain) @@ -1103,6 +1109,8 @@ static int clk_pllxc_set_rate(struct clk_hw *hw, unsigned long rate, spin_lock_irqsave(pll->lock, flags); _get_pll_mnp(pll, &old_cfg); + if (pll->params->flags & TEGRA_PLL_VCO_OUT) + cfg.p = old_cfg.p; if (old_cfg.m != cfg.m || old_cfg.n != cfg.n || old_cfg.p != cfg.p) ret = _program_pll(hw, &cfg, rate); |