linux-kernel - [PATCH 3.16 018/306] clk: divider: Fix clk_divider_round_rate() to use clk

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Date:   Wed, 15 Feb 2017 22:41:40 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org,
        "Geert Uytterhoeven" <geert+renesas@...der.be>,
        "James Hogan" <james.hogan@...tec.com>,
        "Stephen Boyd" <sboyd@...eaurora.org>
Subject: [PATCH 3.16 018/306] clk: divider: Fix clk_divider_round_rate()
 to use clk_readl()

3.16.40-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Geert Uytterhoeven <geert+renesas@...der.be>

commit 2cf9a57811bddb6fa6b0f8d7376da164d5534813 upstream.

clk-divider uses clk_readl()/clk_writel() everywhere, except in
clk_divider_round_rate(), where plain readl() is used. Change this to
clk_readl(), as it makes a difference on powerpc.

Fixes: e6d5e7d90be92cee ("clk-divider: Fix READ_ONLY when divider > 1")
Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
Reviewed-by: James Hogan <james.hogan@...tec.com>
Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/clk/clk-divider.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -263,7 +263,7 @@ static int clk_divider_bestdiv(struct cl
 
 	/* if read only, just return current value */
 	if (divider->flags & CLK_DIVIDER_READ_ONLY) {
-		bestdiv = readl(divider->reg) >> divider->shift;
+		bestdiv = clk_readl(divider->reg) >> divider->shift;
 		bestdiv &= div_mask(divider);
 		bestdiv = _get_div(divider, bestdiv);
 		return bestdiv;