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Message-ID: <20130725111459.145a4aa4@armhf>
Date: Thu, 25 Jul 2013 11:14:59 +0200
From: Jean-Francois Moine <moinejf@...e.fr>
To: Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
Rob Herring <rob.herring@...xeda.com>,
Russell King <rmk+kernel@....linux.org.uk>,
alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org
Subject: [PATCH 4/4] ASoc: kirkwood: add DT support
The kirkwood audio driver is used without DT in the Kirkwood machine.
This patch adds a DT compatible definition for use in other Marvell
machines as the Armada 88AP510 (Dove).
Signed-off-by: Jean-Francois Moine <moinejf@...e.fr>
---
.../devicetree/bindings/sound/kirkwood-i2s.txt | 29 ++++++++++++++++++
sound/soc/kirkwood/kirkwood-i2s.c | 34 +++++++++++++++-------
2 files changed, 52 insertions(+), 11 deletions(-)
create mode 100644 Documentation/devicetree/bindings/sound/kirkwood-i2s.txt
diff --git a/Documentation/devicetree/bindings/sound/kirkwood-i2s.txt b/Documentation/devicetree/bindings/sound/kirkwood-i2s.txt
new file mode 100644
index 0000000..015a769
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/kirkwood-i2s.txt
@@ -0,0 +1,29 @@
+* mvebu (Kirkwood, Dove, Armada 370) I2S controller
+
+Required properties:
+
+- compatible: "marvell,mvebu-i2s"
+
+- reg: physical base address of the controller and length of memory mapped
+ region.
+
+- interrupts: list of two irq numbers.
+ The first irq is used for data flow and the second one is used for errors.
+
+- clocks: one or two phandles.
+ The first one is mandatory and defines the internal clock.
+ The second one is optional and defines an external clock.
+
+- clock-names: names associated to the clocks:
+ "internal" for the internal clock
+ "external" for the external clock
+
+Example:
+
+i2s1: audio-controller@...00 {
+ compatible = "marvell,mvebu-i2s";
+ reg = <0xb4000 0x2210>;
+ interrupts = <21>, <22>;
+ clocks = <&gate_clk 13>;
+ clock-names = "internal";
+};
diff --git a/sound/soc/kirkwood/kirkwood-i2s.c b/sound/soc/kirkwood/kirkwood-i2s.c
index 3517784..fbe5150 100644
--- a/sound/soc/kirkwood/kirkwood-i2s.c
+++ b/sound/soc/kirkwood/kirkwood-i2s.c
@@ -12,7 +12,6 @@
#include <linux/init.h>
#include <linux/module.h>
-#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/mbus.h>
@@ -22,6 +21,8 @@
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <linux/platform_data/asoc-kirkwood.h>
+#include <linux/of.h>
+
#include "kirkwood.h"
#define DRV_NAME "kirkwood-i2s"
@@ -497,16 +498,18 @@ static int kirkwood_i2s_dev_probe(struct platform_device *pdev)
return -ENXIO;
}
- if (!data) {
- dev_err(&pdev->dev, "no platform data ?!\n");
- return -EINVAL;
- }
-
- priv->burst = data->burst;
+ if (np) {
+ priv->burst = 128; /* might be 32 or 128 */
+ } else if (data) {
+ priv->burst = data->burst;
+ } else {
+ dev_err(&pdev->dev, "no DT nor platform data ?!\n");
+ return -EINVAL;
+ }
- priv->clk = devm_clk_get(&pdev->dev, NULL);
+ priv->clk = devm_clk_get(&pdev->dev, "internal");
if (IS_ERR(priv->clk)) {
- dev_err(&pdev->dev, "no clock\n");
+ dev_err(&pdev->dev, "no internal clock\n");
return PTR_ERR(priv->clk);
}
@@ -514,7 +517,7 @@ static int kirkwood_i2s_dev_probe(struct platform_device *pdev)
if (err < 0)
return err;
- priv->extclk = clk_get(&pdev->dev, "extclk");
+ priv->extclk = clk_get(&pdev->dev, "external");
if (!IS_ERR(priv->extclk)) {
if (priv->extclk == priv->clk) {
clk_put(priv->extclk);
@@ -531,7 +534,7 @@ static int kirkwood_i2s_dev_probe(struct platform_device *pdev)
priv->ctl_rec = KIRKWOOD_RECCTL_SIZE_24;
/* Select the burst size */
- if (data->burst == 32) {
+ if (priv->burst == 32) {
priv->ctl_play |= KIRKWOOD_PLAYCTL_BURST_32;
priv->ctl_rec |= KIRKWOOD_RECCTL_BURST_32;
} else {
@@ -556,12 +559,21 @@ fail:
return err;
}
+#ifdef CONFIG_OF
+static struct of_device_id kirkwood_i2s_of_match[] = {
+ { .compatible = "marvell,mvebu-i2s" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, kirkwood_i2s_of_match);
+#endif
+
static struct platform_driver kirkwood_i2s_driver = {
.probe = kirkwood_i2s_dev_probe,
.remove = kirkwood_i2s_dev_remove,
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(kirkwood_i2s_of_match),
},
};
--
1.8.3.2
--
Ken ar c'hentañ | ** Breizh ha Linux atav! **
Jef | http://moinejf.free.fr/
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