linux-kernel - [PATCH 5.5 171/399] clk: renesas: rcar-gen3: Allow changing the RPC[D2] clocks

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Date:   Fri, 21 Feb 2020 08:38:16 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.5 171/399] clk: renesas: rcar-gen3: Allow changing the RPC[D2] clocks

From: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>

[ Upstream commit 0d67c0340a60829c5c1b7d09629d23bbd67696f3 ]

I was unable to get clk_set_rate() setting a lower RPC-IF clock frequency
and that issue boiled down to me not passing CLK_SET_RATE_PARENT flag to
clk_register_composite() when registering the RPC[D2] clocks...

Fixes: db4a0073cc82 ("clk: renesas: rcar-gen3: Add RPC clocks")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Link: https://lore.kernel.org/r/be27a344-d8bf-9e0c-8950-2d1b48498496@cogentembedded.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/clk/renesas/rcar-gen3-cpg.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/renesas/rcar-gen3-cpg.c b/drivers/clk/renesas/rcar-gen3-cpg.c
index c97b647db9b68..488f8b3980c55 100644
--- a/drivers/clk/renesas/rcar-gen3-cpg.c
+++ b/drivers/clk/renesas/rcar-gen3-cpg.c
@@ -470,7 +470,8 @@ static struct clk * __init cpg_rpc_clk_register(const char *name,
 
 	clk = clk_register_composite(NULL, name, &parent_name, 1, NULL, NULL,
 				     &rpc->div.hw,  &clk_divider_ops,
-				     &rpc->gate.hw, &clk_gate_ops, 0);
+				     &rpc->gate.hw, &clk_gate_ops,
+				     CLK_SET_RATE_PARENT);
 	if (IS_ERR(clk)) {
 		kfree(rpc);
 		return clk;
@@ -506,7 +507,8 @@ static struct clk * __init cpg_rpcd2_clk_register(const char *name,
 
 	clk = clk_register_composite(NULL, name, &parent_name, 1, NULL, NULL,
 				     &rpcd2->fixed.hw, &clk_fixed_factor_ops,
-				     &rpcd2->gate.hw, &clk_gate_ops, 0);
+				     &rpcd2->gate.hw, &clk_gate_ops,
+				     CLK_SET_RATE_PARENT);
 	if (IS_ERR(clk))
 		kfree(rpcd2);
 
-- 
2.20.1