Commit a7074c3e authored by Luca Weiss's avatar Luca Weiss Committed by Bjorn Andersson
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clk: qcom: clk-krait: switch to .determine_rate 



.determine_rate is meant to replace .round_rate. The former comes with a
benefit which is especially relevant on 32-bit systems: since
.determine_rate uses an "unsigned long" (compared to a "signed long"
which is used by .round_rate) the maximum value on 32-bit systems
increases from 2^31 (or approx. 2.14GHz) to 2^32 (or approx. 4.29GHz).

Signed-off-by: default avatarLuca Weiss <luca@z3ntu.xyz>
Tested-by: default avatarChristian Marangi <ansuelsmth@gmail.com>
Signed-off-by: default avatarBjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230212-clk-qcom-determine_rate-v1-1-b4e447d4926e@z3ntu.xyz
parent 092209f1

drivers/clk/qcom/clk-krait.c

+5 −5
Original line number Diff line number Diff line
@@ -97,11 +97,11 @@ const struct clk_ops krait_mux_clk_ops = { 
EXPORT_SYMBOL_GPL(krait_mux_clk_ops);



/* The divider can divide by 2, 4, 6 and 8. But we only really need div-2. */

static long krait_div2_round_rate(struct clk_hw *hw, unsigned long rate,

				  unsigned long *parent_rate)

static int krait_div2_determine_rate(struct clk_hw *hw, struct clk_rate_request *req)

{

	*parent_rate = clk_hw_round_rate(clk_hw_get_parent(hw), rate * 2);

	return DIV_ROUND_UP(*parent_rate, 2);

	req->best_parent_rate = clk_hw_round_rate(clk_hw_get_parent(hw), req->rate * 2);

	req->rate = DIV_ROUND_UP(req->best_parent_rate, 2);

	return 0;

}



static int krait_div2_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -142,7 +142,7 @@ krait_div2_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) 
}



const struct clk_ops krait_div2_clk_ops = {

	.round_rate = krait_div2_round_rate,

	.determine_rate = krait_div2_determine_rate,

	.set_rate = krait_div2_set_rate,

	.recalc_rate = krait_div2_recalc_rate,

};