[PATCH 1/4] Allow passing platform_data to devices attached to AC97 bus

From: Marek Vasut <marek.vasut@gmail.com>
To: avorontsov@ru.mvista.com
Cc: alsa-devel@alsa-project.org,
	Russell King - ARM Linux <linux@arm.linux.org.uk>,
	Takashi Iwai <tiwai@suse.de>,
	Robert Jarzmik <robert.jarzmik@free.fr>,
	Mark Brown <broonie@opensource.wolfsonmicro.com>,
	cbou@mail.ru, Eric Miao <eric.y.miao@gmail.com>,
	dwmw2@infradead.org, linux-arm-kernel@lists.arm.linux.org.uk
Subject: [PATCH 1/4] Allow passing platform_data to devices attached to AC97 bus
Date: Wed, 22 Jul 2009 13:01:03 +0200	[thread overview]
Message-ID: <200907221301.04239.marek.vasut@gmail.com> (raw)
In-Reply-To: <20090721223424.GA21147@oksana.dev.rtsoft.ru>

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Ok,
Im sending the set again.

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From 5ed7859b282c23c2f98167ef3f821625ee8907aa Mon Sep 17 00:00:00 2001
From: Marek Vasut <marek.vasut@gmail.com>
Date: Tue, 21 Jul 2009 16:22:29 +0200
Subject: [PATCH 1/4] Allow passing platform_data to devices attached to AC97 bus

This patch allows passing platform_data to devices attached to AC97 bus
(like touchscreens, battery measurement chips ...).

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
---
 include/sound/ac97_codec.h |    6 ++++++
 include/sound/soc-dai.h    |    1 +
 sound/soc/soc-core.c       |    6 +++++-
 3 files changed, 12 insertions(+), 1 deletions(-)

diff --git a/include/sound/ac97_codec.h b/include/sound/ac97_codec.h
index 251fc1c..9b1c098 100644
--- a/include/sound/ac97_codec.h
+++ b/include/sound/ac97_codec.h
@@ -642,4 +642,10 @@ int snd_ac97_pcm_double_rate_rules(struct snd_pcm_runtime *runtime);
 /* ad hoc AC97 device driver access */
 extern struct bus_type ac97_bus_type;
 
+/* AC97 platform_data adding function */
+static inline void snd_ac97_dev_add_pdata(struct snd_ac97 *ac97, void *data)
+{
+	ac97->dev.platform_data = data;
+}
+
 #endif /* __SOUND_AC97_CODEC_H */
diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h
index 352d7ee..0d65a03 100644
--- a/include/sound/soc-dai.h
+++ b/include/sound/soc-dai.h
@@ -179,6 +179,7 @@ struct snd_soc_dai {
 	int ac97_control;
 
 	struct device *dev;
+	void *ac97_pdata;	/* platform_data for the ac97 codec */
 
 	/* DAI callbacks */
 	int (*probe)(struct platform_device *pdev,
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 1d70829..7cb0917 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -28,6 +28,7 @@
 #include <linux/bitops.h>
 #include <linux/debugfs.h>
 #include <linux/platform_device.h>
+#include <sound/ac97_codec.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
@@ -1381,8 +1382,11 @@ int snd_soc_init_card(struct snd_soc_device *socdev)
 				continue;
 			}
 		}
-		if (card->dai_link[i].codec_dai->ac97_control)
+		if (card->dai_link[i].codec_dai->ac97_control) {
 			ac97 = 1;
+			snd_ac97_dev_add_pdata(codec->ac97,
+				card->dai_link[i].cpu_dai->ac97_pdata);
+		}
 	}
 	snprintf(codec->card->shortname, sizeof(codec->card->shortname),
 		 "%s",  card->name);
-- 
1.6.3.3


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