On 10/10/2010 11:54 PM, Mika Westerberg wrote:
> Add platform support for the EP93xx AC97 controller driver.
>
> Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxx>
> ---
> arch/arm/mach-ep93xx/core.c | 32 +++++++++++++++++++++++
> arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h | 1 +
> arch/arm/mach-ep93xx/include/mach/platform.h | 1 +
> 3 files changed, 34 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
> index 4cb55d3..6f514c4 100644
> --- a/arch/arm/mach-ep93xx/core.c
> +++ b/arch/arm/mach-ep93xx/core.c
> @@ -826,6 +826,38 @@ void ep93xx_i2s_release(void)
> }
> EXPORT_SYMBOL(ep93xx_i2s_release);
>
> +/*************************************************************************
> + * EP93xx AC97 audio peripheral handling
> + *************************************************************************/
> +static struct resource ep93xx_ac97_resources[] = {
> + {
> + .start = EP93XX_AAC_PHYS_BASE,
> + .end = EP93XX_AAC_PHYS_BASE + 0xb0 - 1,
> + .flags = IORESOURCE_MEM,
> + },
> + {
> + .start = IRQ_EP93XX_AACINTR,
> + .end = IRQ_EP93XX_AACINTR,
> + .flags = IORESOURCE_IRQ,
> + },
> +};
> +
> +static struct platform_device ep93xx_ac97_device = {
> + .name = "ep93xx-ac97",
> + .id = -1,
> + .num_resources = ARRAY_SIZE(ep93xx_ac97_resources),
> + .resource = ep93xx_ac97_resources,
> +};
> +
> +void __init ep93xx_register_ac97(void)
> +{
> + /*
> + * Make sure that the AC97 pins are not used by I2S.
> + */
> + ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
> + platform_device_register(&ep93xx_ac97_device);
> +}
The other ep93xx device support functions do this with acquire/release
functions. However, it is quite unlikely that a board will ever need to
switch from i2s to ac97 audio at runtime. Will see what Hartley thinks.
~Ryan
--
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