From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
To: Stephen Boyd <sboyd@codeaurora.org>,
Michael Turquette <mturquette@baylibre.com>
Cc: <linux-renesas-soc@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-clk@vger.kernel.org>
Subject: [PATCH 1/3] clk: cs2000: enable clock skipping mode
Date: Tue, 18 Apr 2017 02:18:19 +0000 [thread overview]
Message-ID: <87shl6xy19.wl%kuninori.morimoto.gx@renesas.com> (raw)
In-Reply-To: <87tw5mxy2h.wl%kuninori.morimoto.gx@renesas.com>
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
CLK_IN skipping mode allows the PLL to maintain lock even when the
CLK_IN signal has missing pulses for up to 20 ms (t CS) at a time.
This patch enables it
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
drivers/clk/clk-cs2000-cp.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/clk/clk-cs2000-cp.c b/drivers/clk/clk-cs2000-cp.c
index 4df38c5..a8fa6bd 100644
--- a/drivers/clk/clk-cs2000-cp.c
+++ b/drivers/clk/clk-cs2000-cp.c
@@ -54,6 +54,7 @@
#define ENDEV2 (0x1)
/* FUNC_CFG1 */
+#define CLKSKIPEN (1 << 7)
#define REFCLKDIV(x) (((x) & 0x3) << 3)
#define REFCLKDIV_MASK REFCLKDIV(0x3)
@@ -122,6 +123,11 @@ static int cs2000_enable_dev_config(struct cs2000_priv *priv, bool enable)
if (ret < 0)
return ret;
+ ret = cs2000_bset(priv, FUNC_CFG1, CLKSKIPEN,
+ enable ? CLKSKIPEN : 0);
+ if (ret < 0)
+ return ret;
+
return 0;
}
--
1.9.1
next prev parent reply other threads:[~2017-04-18 2:18 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-18 2:17 [PATCH 0/3] clk: cs2000: tidyup missing settings Kuninori Morimoto
2017-04-18 2:18 ` Kuninori Morimoto [this message]
2017-04-18 2:19 ` [PATCH 2/3] clk: cs2000: tidyup DEVICE_CFG2 settings Kuninori Morimoto
2017-04-18 2:20 ` [PATCH 3/3] clk: cs2000: select 12.20 High Accuracy on LFRatioCfg Kuninori Morimoto
2017-04-19 17:19 ` [PATCH 0/3] clk: cs2000: tidyup missing settings Stephen Boyd
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