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[ARM] 4833/3: Convert non-SoC PXA2xx AC97 driver to clock API
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Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Mark Brown authored and Russell King committed Apr 19, 2008
1 parent 60bfe7f commit 93873fb
Showing 1 changed file with 40 additions and 8 deletions.
48 changes: 40 additions & 8 deletions sound/arm/pxa2xx-ac97.c
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <linux/clk.h>
#include <linux/delay.h>

#include <sound/core.h>
Expand All @@ -35,6 +36,10 @@
static DEFINE_MUTEX(car_mutex);
static DECLARE_WAIT_QUEUE_HEAD(gsr_wq);
static volatile long gsr_bits;
static struct clk *ac97_clk;
#ifdef CONFIG_PXA27x
static struct clk *ac97conf_clk;
#endif

/*
* Beware PXA27x bugs:
Expand Down Expand Up @@ -112,9 +117,9 @@ static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
gsr_bits = 0;
#ifdef CONFIG_PXA27x
/* PXA27x Developers Manual section 13.5.2.2.1 */
pxa_set_cken(CKEN_AC97CONF, 1);
clk_enable(ac97conf_clk);
udelay(5);
pxa_set_cken(CKEN_AC97CONF, 0);
clk_disable(ac97conf_clk);
GCR = GCR_COLD_RST;
udelay(50);
#else
Expand Down Expand Up @@ -259,7 +264,7 @@ static int pxa2xx_ac97_do_suspend(struct snd_card *card, pm_message_t state)
if (platform_ops && platform_ops->suspend)
platform_ops->suspend(platform_ops->priv);
GCR |= GCR_ACLINK_OFF;
pxa_set_cken(CKEN_AC97, 0);
clk_disable(ac97_clk);

return 0;
}
Expand All @@ -268,7 +273,7 @@ static int pxa2xx_ac97_do_resume(struct snd_card *card)
{
pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;

pxa_set_cken(CKEN_AC97, 1);
clk_enable(ac97_clk);
if (platform_ops && platform_ops->resume)
platform_ops->resume(platform_ops->priv);
snd_ac97_resume(pxa2xx_ac97_ac97);
Expand Down Expand Up @@ -335,8 +340,21 @@ static int __devinit pxa2xx_ac97_probe(struct platform_device *dev)
#ifdef CONFIG_PXA27x
/* Use GPIO 113 as AC97 Reset on Bulverde */
pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT);
ac97conf_clk = clk_get(&dev->dev, "AC97CONFCLK");
if (IS_ERR(ac97conf_clk)) {
ret = PTR_ERR(ac97conf_clk);
ac97conf_clk = NULL;
goto err;
}
#endif
pxa_set_cken(CKEN_AC97, 1);

ac97_clk = clk_get(&dev->dev, "AC97CLK");
if (IS_ERR(ac97_clk)) {
ret = PTR_ERR(ac97_clk);
ac97_clk = NULL;
goto err;
}
clk_enable(ac97_clk);

ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
if (ret)
Expand All @@ -361,11 +379,19 @@ static int __devinit pxa2xx_ac97_probe(struct platform_device *dev)
err:
if (card)
snd_card_free(card);
if (CKEN & (1 << CKEN_AC97)) {
if (ac97_clk) {
GCR |= GCR_ACLINK_OFF;
free_irq(IRQ_AC97, NULL);
pxa_set_cken(CKEN_AC97, 0);
clk_disable(ac97_clk);
clk_put(ac97_clk);
ac97_clk = NULL;
}
#ifdef CONFIG_PXA27x
if (ac97conf_clk) {
clk_put(ac97conf_clk);
ac97conf_clk = NULL;
}
#endif
return ret;
}

Expand All @@ -378,7 +404,13 @@ static int __devexit pxa2xx_ac97_remove(struct platform_device *dev)
platform_set_drvdata(dev, NULL);
GCR |= GCR_ACLINK_OFF;
free_irq(IRQ_AC97, NULL);
pxa_set_cken(CKEN_AC97, 0);
clk_disable(ac97_clk);
clk_put(ac97_clk);
ac97_clk = NULL;
#ifdef CONFIG_PXA27x
clk_put(ac97conf_clk);
ac97conf_clk = NULL;
#endif
}

return 0;
Expand Down

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