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clk: tegra: Replace .round_rate() with .determine_rate()

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Replace the .round_rate() callback with .determine_rate() which can
consider max_rate imposed by clk_set_max_rate() while rounding the clock
rate.

Note that if the .determine_rate() callback is defined it will be called
instead of the .round_rate() callback when calling clk_round_rate(). By
using .determine_rate(), the maximum rate returned when calling
clk_round_rate() is now limited by the current max_rate.

Signed-off-by: Rajkumar Kasirajan <rkasirajan@nvidia.com>
[jonathanh@nvidia.com: checkpatch fixes and commit message update]
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Rajkumar Kasirajan 2022-04-06 16:17:01 +01:00 committed by Thierry Reding
parent 2db12b15c6
commit 6a7ace2b99
1 changed files with 10 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/clk/tegra/clk-bpmp.c
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@ -164,15 +164,18 @@ static unsigned long tegra_bpmp_clk_recalc_rate(struct clk_hw *hw,
return response.rate;
}
static long tegra_bpmp_clk_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
static int tegra_bpmp_clk_determine_rate(struct clk_hw *hw,
struct clk_rate_request *rate_req)
{
struct tegra_bpmp_clk *clk = to_tegra_bpmp_clk(hw);
struct cmd_clk_round_rate_response response;
struct cmd_clk_round_rate_request request;
struct tegra_bpmp_clk_message msg;
unsigned long rate;
int err;
rate = min(max(rate_req->rate, rate_req->min_rate), rate_req->max_rate);
memset(&request, 0, sizeof(request));
request.rate = min_t(u64, rate, S64_MAX);
@ -188,7 +191,9 @@ static long tegra_bpmp_clk_round_rate(struct clk_hw *hw, unsigned long rate,
if (err < 0)
return err;
return response.rate;
rate_req->rate = (unsigned long)response.rate;
return 0;
}
static int tegra_bpmp_clk_set_parent(struct clk_hw *hw, u8 index)
@ -290,7 +295,7 @@ static const struct clk_ops tegra_bpmp_clk_rate_ops = {
.unprepare = tegra_bpmp_clk_unprepare,
.is_prepared = tegra_bpmp_clk_is_prepared,
.recalc_rate = tegra_bpmp_clk_recalc_rate,
.round_rate = tegra_bpmp_clk_round_rate,
.determine_rate = tegra_bpmp_clk_determine_rate,
.set_rate = tegra_bpmp_clk_set_rate,
};
@ -299,7 +304,7 @@ static const struct clk_ops tegra_bpmp_clk_mux_rate_ops = {
.unprepare = tegra_bpmp_clk_unprepare,
.is_prepared = tegra_bpmp_clk_is_prepared,
.recalc_rate = tegra_bpmp_clk_recalc_rate,
.round_rate = tegra_bpmp_clk_round_rate,
.determine_rate = tegra_bpmp_clk_determine_rate,
.set_parent = tegra_bpmp_clk_set_parent,
.get_parent = tegra_bpmp_clk_get_parent,
.set_rate = tegra_bpmp_clk_set_rate,