linux-kernel - [PATCH v2 1/4] drivers: clk: zynqmp: Limit bestdiv with maxdiv

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Date:   Mon,  2 Mar 2020 13:50:40 -0800
From:   Jolly Shah <jolly.shah@...inx.com>
To:     olof@...om.net, mturquette@...libre.com, sboyd@...nel.org,
        michal.simek@...inx.com, arm@...nel.org, linux-clk@...r.kernel.org
Cc:     rajanv@...inx.com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Rajan Vaja <rajan.vaja@...inx.com>,
        Jolly Shah <jolly.shah@...inx.com>
Subject: [PATCH v2 1/4] drivers: clk: zynqmp: Limit bestdiv with maxdiv

From: Rajan Vaja <rajan.vaja@...inx.com>

Clock divider value should not be greater than maximum divider value.
So use minimum of best divider or maximum divider value.

Signed-off-by: Rajan Vaja <rajan.vaja@...inx.com>
Signed-off-by: Jolly Shah <jolly.shah@...inx.com>
---
 drivers/clk/zynqmp/divider.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/clk/zynqmp/divider.c b/drivers/clk/zynqmp/divider.c
index 973cdf0..7d2cb61 100644
--- a/drivers/clk/zynqmp/divider.c
+++ b/drivers/clk/zynqmp/divider.c
@@ -198,6 +198,8 @@ static long zynqmp_clk_divider_round_rate(struct clk_hw *hw,
 
 	if ((clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT) && divider->is_frac)
 		bestdiv = rate % *prate ? 1 : bestdiv;
+
+	bestdiv = min_t(u32, bestdiv, divider->max_div);
 	*prate = rate * bestdiv;
 
 	return rate;
-- 
2.7.4