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Commit 913c3072 authored by Dmitry Osipenko's avatar Dmitry Osipenko Committed by Stephen Boyd
Browse files

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: default avatarDmitry Osipenko <digetx@gmail.com>
Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent 888ca40e

drivers/clk/tegra/clk-emc.c

+10 −7
Original line number Diff line number Diff line
@@ -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;
@@ -145,11 +150,9 @@ 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;

	}

	}



	if (timing) {

		req->rate = timing->rate;