linux-kernel - [PATCH 3/3] clk: cs2000: select 12.20 High Accuracy on LFRatioCfg

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Message-ID: <87pogaxxyb.wl%kuninori.morimoto.gx@renesas.com>
Date:   Tue, 18 Apr 2017 02:20:03 +0000
From:   Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:     Stephen Boyd <sboyd@...eaurora.org>,
        Michael Turquette <mturquette@...libre.com>
CC:     <linux-renesas-soc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-clk@...r.kernel.org>
Subject: [PATCH 3/3] clk: cs2000: select 12.20 High Accuracy on LFRatioCfg


From: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>

cs2000 can select Static/Dynamic ratio based Frequency Synthesizer
Mode, it can select 20.12 High Multiplier interpret for 32-bit
User Defined Ratio if Dynamic ratio mode. Otherwise it should select
12.20 High Accuracy mode.
Current cs2000 is supporting Static ratio mode only, so it should
select 12.20 High Accuracy mode, not 20.12 High Multiplier mode.
This patch fixes it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
---
 drivers/clk/clk-cs2000-cp.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/clk/clk-cs2000-cp.c b/drivers/clk/clk-cs2000-cp.c
index f3ab0ca..c54baed 100644
--- a/drivers/clk/clk-cs2000-cp.c
+++ b/drivers/clk/clk-cs2000-cp.c
@@ -60,6 +60,11 @@
 #define REFCLKDIV(x)	(((x) & 0x3) << 3)
 #define REFCLKDIV_MASK	REFCLKDIV(0x3)
 
+/* FUNC_CFG2 */
+#define LFRATIO_MASK	(1 << 3)
+#define LFRATIO_20_12	(0 << 3)
+#define LFRATIO_12_20	(1 << 3)
+
 #define CH_SIZE_ERR(ch)		((ch < 0) || (ch >= CH_MAX))
 #define hw_to_priv(_hw)		container_of(_hw, struct cs2000_priv, hw)
 #define priv_to_client(priv)	(priv->client)
@@ -130,6 +135,12 @@ static int cs2000_enable_dev_config(struct cs2000_priv *priv, bool enable)
 	if (ret < 0)
 		return ret;
 
+	/* FIXME: for Static ratio mode */
+	ret = cs2000_bset(priv, FUNC_CFG2, LFRATIO_MASK,
+			  LFRATIO_12_20);
+	if (ret < 0)
+		return ret;
+
 	return 0;
 }
 
-- 
1.9.1