87 lines
2.6 KiB
Diff
87 lines
2.6 KiB
Diff
From 48e87b89080e40af51338d5966480753b09ef7d3 Mon Sep 17 00:00:00 2001
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From: Florian Meier <florian.meier@koalo.de>
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Date: Fri, 22 Nov 2013 19:04:54 +0100
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Subject: [PATCH 036/148] BCM2708: Add I2S support to board file
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Adds the required initializations for I2S
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to the board file of mach-bcm2708.
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Signed-off-by: Florian Meier <florian.meier@koalo.de>
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bcm2708-i2s: Enable MMAP support via a DT property and overlay
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The i2s driver used to claim to support MMAP, but that feature was disabled
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when some problems were found. Add the ability to enable this feature
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through Device Tree, using the i2s-mmap overlay.
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See: #1004
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---
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arch/arm/mach-bcm2708/bcm2708.c | 26 ++++++++++++++++++++++++++
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sound/soc/bcm/bcm2708-i2s.c | 7 ++++++-
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2 files changed, 32 insertions(+), 1 deletion(-)
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--- a/arch/arm/mach-bcm2708/bcm2708.c
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+++ b/arch/arm/mach-bcm2708/bcm2708.c
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@@ -616,6 +616,28 @@ static struct platform_device bcm2835_th
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.name = "bcm2835_thermal",
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};
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+#if defined(CONFIG_SND_BCM2708_SOC_I2S) || defined(CONFIG_SND_BCM2708_SOC_I2S_MODULE)
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+static struct resource bcm2708_i2s_resources[] = {
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+ {
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+ .start = I2S_BASE,
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+ .end = I2S_BASE + 0x20,
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+ .flags = IORESOURCE_MEM,
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+ },
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+ {
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+ .start = PCM_CLOCK_BASE,
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+ .end = PCM_CLOCK_BASE + 0x02,
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+ .flags = IORESOURCE_MEM,
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+ }
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+};
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+
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+static struct platform_device bcm2708_i2s_device = {
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+ .name = "bcm2708-i2s",
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+ .id = 0,
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+ .num_resources = ARRAY_SIZE(bcm2708_i2s_resources),
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+ .resource = bcm2708_i2s_resources,
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+};
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+#endif
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+
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int __init bcm_register_device(struct platform_device *pdev)
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{
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int ret;
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@@ -780,6 +802,10 @@ void __init bcm2708_init(void)
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bcm_register_device_dt(&bcm2835_thermal_device);
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+#if defined(CONFIG_SND_BCM2708_SOC_I2S) || defined(CONFIG_SND_BCM2708_SOC_I2S_MODULE)
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+ bcm_register_device_dt(&bcm2708_i2s_device);
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+#endif
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+
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if (!use_dt) {
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for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
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struct amba_device *d = amba_devs[i];
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--- a/sound/soc/bcm/bcm2708-i2s.c
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+++ b/sound/soc/bcm/bcm2708-i2s.c
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@@ -874,7 +874,7 @@ static const struct snd_soc_component_dr
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.name = "bcm2708-i2s-comp",
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};
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-static const struct snd_pcm_hardware bcm2708_pcm_hardware = {
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+static struct snd_pcm_hardware bcm2708_pcm_hardware = {
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.info = SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_JOINT_DUPLEX,
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.formats = SNDRV_PCM_FMTBIT_S16_LE |
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@@ -902,6 +902,11 @@ static int bcm2708_i2s_probe(struct plat
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struct regmap *regmap[2];
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struct resource *mem[2];
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+ if (of_property_read_bool(pdev->dev.of_node, "brcm,enable-mmap"))
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+ bcm2708_pcm_hardware.info |=
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+ SNDRV_PCM_INFO_MMAP |
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+ SNDRV_PCM_INFO_MMAP_VALID;
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+
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/* Request both ioareas */
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for (i = 0; i <= 1; i++) {
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void __iomem *base;
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