linux-kernel - [PATCH 5/5] clk: ingenic: Respect CLK_SET_RATE_PARENT in .round

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Date:   Thu,  3 Sep 2020 03:50:48 +0200
From:   Paul Cercueil <paul@...pouillou.net>
To:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>
Cc:     od@...c.me, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH 5/5] clk: ingenic: Respect CLK_SET_RATE_PARENT in .round_rate

Clocks that don't have a divider are in our case all marked with the
CLK_SET_RATE_PARENT flag. In this case, the .round_rate implementation
should modify the value pointed to by parent_rate, in order to propagate
the rate change to the parent, as explained in the documentation of
clk_set_rate().

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
 drivers/clk/ingenic/cgu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/clk/ingenic/cgu.c b/drivers/clk/ingenic/cgu.c
index a1a4f1adaa3a..dac6edc670cc 100644
--- a/drivers/clk/ingenic/cgu.c
+++ b/drivers/clk/ingenic/cgu.c
@@ -445,6 +445,8 @@ ingenic_clk_round_rate(struct clk_hw *hw, unsigned long req_rate,
 		div = ingenic_clk_calc_div(clk_info, *parent_rate, req_rate);
 	else if (clk_info->type & CGU_CLK_FIXDIV)
 		div = clk_info->fixdiv.div;
+	else if (clk_hw_can_set_rate_parent(hw))
+		*parent_rate = req_rate;
 
 	return DIV_ROUND_UP(*parent_rate, div);
 }
-- 
2.28.0