Device tree support for McBSP modules on OMAP2+ SoC.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
---
.../devicetree/bindings/sound/omap-mcbsp.txt | 45 +++++++++++++
sound/soc/omap/omap-mcbsp.c | 66 +++++++++++++++++++-
2 files changed, 110 insertions(+), 1 deletions(-)
create mode 100644 Documentation/devicetree/bindings/sound/omap-mcbsp.txt
diff --git a/Documentation/devicetree/bindings/sound/omap-mcbsp.txt b/Documentation/devicetree/bindings/sound/omap-mcbsp.txt
new file mode 100644
index 0000000..447cb13
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/omap-mcbsp.txt
@@ -0,0 +1,45 @@
+* Texas Instruments OMAP2+ McBSP module
+
+Required properties:
+- compatible: "ti,omap2420-mcbsp" for McBSP on OMAP2420
+ "ti,omap2430-mcbsp" for McBSP on OMAP2430
+ "ti,omap3-mcbsp" for McBSP on OMAP3
+ "ti,omap4-mcbsp" for McBSP on OMAP4 and newer SoC
+- reg: Register location and size, for OMAP4+ as an array:
+ <MPU access base address, size>,
+ <L3 interconnect address, size>;
+- interrupts: Interrupt numbers for the McBSP port, as an array in case the
+ McBSP IP have more interrupt lines:
+ <OCP compliant irq>,
+ <TX irq>,
+ <RX irq>;
+- interrupt-parent: The parent interrupt controller
+- ti,buffer-size: Size of the FIFO on the port (OMAP2430 and newer SoC)
+- ti,hwmods: Name of the hwmod associated to the McBSP port
+
+Sidetone support for OMAP3 McBSP2 and 3 ports:
+- sidetone { }: Within this section the following parameters are required:
+- reg: Register location and size for the ST block
+- interrupts: The interrupt number for the ST block
+- interrupt-parent: The parent interrupt controller for the ST block
+
+Example:
+
+mcbsp2: mcbsp@49022000 {
+ compatible = "ti,omap3-mcbsp";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ reg = <0x49022000 0xff>;
+ interrupts = <0 17 0x4>, /* OCP compliant interrup */
+ <0 62 0x4>, /* TX interrup */
+ <0 63 0x4>; /* RX interrup */
+ interrupt-parent = <&intc>;
+ ti,buffer-size = <1280>;
+ ti,hwmods = "mcbsp2";
+
+ sidetone {
+ reg = <0x49028000 0xff>;
+ interrupts = <0 4 0x4>;
+ interrupt-parent = <&intc>;
+ };
+};
diff --git a/sound/soc/omap/omap-mcbsp.c b/sound/soc/omap/omap-mcbsp.c
index b9770ee..2e1750e 100644
--- a/sound/soc/omap/omap-mcbsp.c
+++ b/sound/soc/omap/omap-mcbsp.c
@@ -26,6 +26,8 @@
#include <linux/module.h>
#include <linux/device.h>
#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
@@ -737,13 +739,74 @@ int omap_mcbsp_st_add_controls(struct snd_soc_pcm_runtime *rtd)
}
EXPORT_SYMBOL_GPL(omap_mcbsp_st_add_controls);
+static struct omap_mcbsp_platform_data omap2420_pdata = {
+ .reg_step = 4,
+ .reg_size = 2,
+};
+
+static struct omap_mcbsp_platform_data omap2430_pdata = {
+ .reg_step = 4,
+ .reg_size = 4,
+ .has_ccr = true,
+};
+
+static struct omap_mcbsp_platform_data omap3_pdata = {
+ .reg_step = 4,
+ .reg_size = 4,
+ .has_ccr = true,
+ .has_wakeup = true,
+};
+
+static struct omap_mcbsp_platform_data omap4_pdata = {
+ .reg_step = 4,
+ .reg_size = 4,
+ .has_ccr = true,
+ .has_wakeup = true,
+};
+
+static const struct of_device_id omap_mcbsp_of_match[] = {
+ {
+ .compatible = "ti,omap2420-mcbsp",
+ .data = &omap2420_pdata,
+ },
+ {
+ .compatible = "ti,omap2430-mcbsp",
+ .data = &omap2430_pdata,
+ },
+ {
+ .compatible = "ti,omap3-mcbsp",
+ .data = &omap3_pdata,
+ },
+ {
+ .compatible = "ti,omap4-mcbsp",
+ .data = &omap4_pdata,
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, omap_mcbsp_of_match);
+
static __devinit int asoc_mcbsp_probe(struct platform_device *pdev)
{
struct omap_mcbsp_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct omap_mcbsp *mcbsp;
+ const struct of_device_id *match;
int ret;
- if (!pdata) {
+ match = of_match_device(omap_mcbsp_of_match, &pdev->dev);
+ if (match) {
+ struct device_node *node = pdev->dev.of_node;
+ int buffer_size;
+
+ pdata = devm_kzalloc(&pdev->dev,
+ sizeof(struct omap_mcbsp_platform_data),
+ GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+
+ memcpy(pdata, match->data, sizeof(*pdata));
+ if (!of_property_read_u32(node, "ti,buffer-size", &buffer_size))
+ pdata->buffer_size = buffer_size;
+ } else if (!pdata) {
dev_err(&pdev->dev, "missing platform data.\n");
return -EINVAL;
}
@@ -785,6 +848,7 @@ static struct platform_driver asoc_mcbsp_driver = {
.driver = {
.name = "omap-mcbsp",
.owner = THIS_MODULE,
+ .of_match_table = omap_mcbsp_of_match,
},
.probe = asoc_mcbsp_probe,
--
1.7.8.6
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