linux-kernel - [RFC PATCH 1/2] ASoC: add support of mclk clock providers in wm8894 driver

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Date:   Thu, 14 Dec 2017 17:53:57 +0100
From:   Olivier Moysan <olivier.moysan@...com>
To:     <lgirdwood@...il.com>, <broonie@...nel.org>, <perex@...ex.cz>,
        <tiwai@...e.com>, <mcoquelin.stm32@...il.com>,
        <alexandre.torgue@...com>, <alsa-devel@...a-project.org>,
        <linux-arm-kernel@...ts.infradead.org>, <kernel@...inux.com>,
        <linux-kernel@...r.kernel.org>, <olivier.moysan@...com>
CC:     <arnaud.pouliquen@...com>, <benjamin.gaignard@...com>,
        <patches@...nsource.wolfsonmicro.com>
Subject: [RFC PATCH 1/2] ASoC: add support of mclk clock providers in wm8894 driver

Wolfson wm8994 codec bindings exposes MCLK1 and MCLK1 clocks.
This patch adds support of MCLK1 and MCLK2 in mfd driver.

Signed-off-by: Olivier Moysan <olivier.moysan@...com>
---
 drivers/mfd/wm8994-core.c        | 9 +++++++++
 include/linux/mfd/wm8994/pdata.h | 6 ++++++
 2 files changed, 15 insertions(+)

diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index 953d079..f1ff9d8 100644
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -12,6 +12,7 @@
  *
  */
 
+#include <linux/clk.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -310,6 +311,14 @@ static int wm8994_set_pdata_from_of(struct wm8994 *wm8994)
 	if (pdata->ldo[1].enable < 0)
 		pdata->ldo[1].enable = 0;
 
+	pdata->mclk1 = devm_clk_get(wm8994->dev, "MCLK1");
+	if (IS_ERR(pdata->mclk1))
+		pdata->mclk1 = NULL;
+
+	pdata->mclk2 = devm_clk_get(wm8994->dev, "MCLK2");
+	if (IS_ERR(pdata->mclk2))
+		pdata->mclk2 = NULL;
+
 	return 0;
 }
 #else
diff --git a/include/linux/mfd/wm8994/pdata.h b/include/linux/mfd/wm8994/pdata.h
index 90c6052..8037d26 100644
--- a/include/linux/mfd/wm8994/pdata.h
+++ b/include/linux/mfd/wm8994/pdata.h
@@ -233,6 +233,12 @@ struct wm8994_pdata {
 	 * GPIO for the IRQ pin if host only supports edge triggering
 	 */
 	int irq_gpio;
+
+	/* MCLK1 clock provider */
+	struct clk *mclk1;
+
+	/* MCLK2 clock provider */
+	struct clk *mclk2;
 };
 
 #endif
-- 
1.9.1