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authorDmitry Osipenko <digetx@gmail.com>2019-04-14 22:23:19 +0300
committerStephen Boyd <sboyd@kernel.org>2019-04-25 13:54:20 -0700
commit913c3072eb58978f46851c195aa81586d0fd182b (patch)
treee797da77ead714f5279544ab9082e4387055c49b /drivers/clk/tegra
parent888ca40e2843a24d2d4830780a4a5705a3fb219a (diff)
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.c17
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) {