diff options
| author |   Dmitry Osipenko <digetx@gmail.com> | 2019-04-14 22:23:19 +0300 |
|---|---|---|
| committer |   Stephen Boyd <sboyd@kernel.org> | 2019-04-25 13:54:20 -0700 |
| commit | 913c3072eb58978f46851c195aa81586d0fd182b (patch) | |
| tree | e797da77ead714f5279544ab9082e4387055c49b /drivers/clk/tegra | |
| parent | clk: tegra: emc: Support multiple RAM codes (diff) | |
| download | linux-dev-913c3072eb58978f46851c195aa81586d0fd182b.tar.xz linux-dev-913c3072eb58978f46851c195aa81586d0fd182b.zip | |
clk: tegra: emc: Fix EMC max-rate clamping
When a clk user requests rate that is higher than the maximum possible,
the rate shall be clamped to the maximum and not to the current value.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Diffstat (limited to 'drivers/clk/tegra')
| -rw-r--r-- | drivers/clk/tegra/clk-emc.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/drivers/clk/tegra/clk-emc.c b/drivers/clk/tegra/clk-emc.c index 28068584ff6e..9a0179235939 100644 --- a/drivers/clk/tegra/clk-emc.c +++ b/drivers/clk/tegra/clk-emc.c @@ -121,7 +121,7 @@ static int emc_determine_rate(struct clk_hw *hw, struct clk_rate_request *req) struct tegra_clk_emc *tegra; u8 ram_code = tegra_read_ram_code(); struct emc_timing *timing = NULL; - int i, k; + int i, k, t; tegra = container_of(hw, struct tegra_clk_emc, hw); @@ -130,12 +130,17 @@ static int emc_determine_rate(struct clk_hw *hw, struct clk_rate_request *req) break; } - for (i = k; i < tegra->num_timings; i++) { - if (tegra->timings[i].ram_code != ram_code) + for (t = k; t < tegra->num_timings; t++) { + if (tegra->timings[t].ram_code != ram_code) break; + } + for (i = k; i < t; i++) { timing = tegra->timings + i; + if (timing->rate < req->rate && i != t - 1) + continue; + if (timing->rate > req->max_rate) { i = max(i, k + 1); req->rate = tegra->timings[i - 1].rate; @@ -145,10 +150,8 @@ static int emc_determine_rate(struct clk_hw *hw, struct clk_rate_request *req) if (timing->rate < req->min_rate) continue; - if (timing->rate >= req->rate) { - req->rate = timing->rate; - return 0; - } + req->rate = timing->rate; + return 0; } if (timing) { |