@@ -5,6 +5,15 @@ Required properties:
or "fsl,imx31-audmux" for the version firstly used on i.MX31.
- reg : Should contain AUDMUX registers location and length
+An initial configuration can be setup using child nodes.
+
+Required properties of optional child nodes:
+- fsl,audmux-port : Integer of the audmux port that is configured by this
+ child node.
+- fsl,port-config : List of configuration options for the specific port. For
+ imx31-audmux and above, it is a list of tuples <ptcr pdcr>. For
+ imx21-audmux it is a list of pcr values.
+
Example:
audmux@021d8000 {
@@ -251,6 +251,66 @@ int imx_audmux_v2_configure_port(unsigned int port, unsigned int ptcr,
}
EXPORT_SYMBOL_GPL(imx_audmux_v2_configure_port);
+static int imx_audmux_parse_dt_defaults(struct platform_device *pdev,
+ struct device_node *of_node)
+{
+ struct device_node *child;
+
+ for_each_available_child_of_node(of_node, child) {
+ unsigned int port;
+ unsigned int ptcr = 0;
+ unsigned int pdcr = 0;
+ unsigned int pcr = 0;
+ unsigned int val;
+ int ret;
+ int i = 0;
+
+ ret = of_property_read_u32(child, "fsl,audmux-port", &port);
+ if (ret) {
+ dev_warn(&pdev->dev, "Failed to get fsl,audmux-port of child node \"%s\"\n",
+ child->full_name);
+ continue;
+ }
+ if (!of_property_read_bool(child, "fsl,port-config")) {
+ dev_warn(&pdev->dev, "child node \"%s\" does not have property fsl,port-config\n",
+ child->full_name);
+ continue;
+ }
+
+ for (i = 0; (ret = of_property_read_u32_index(child,
+ "fsl,port-config\n", i, &val)) == 0;
+ ++i) {
+ if (audmux_type == IMX31_AUDMUX) {
+ if (i % 2)
+ pdcr |= val;
+ else
+ ptcr |= val;
+ } else {
+ pcr |= val;
+ }
+ }
+
+ if (ret != -ENODATA) {
+ dev_err(&pdev->dev, "Failed to read u32 at index %d of child %s\n",
+ i, child->full_name);
+ continue;
+ }
+
+ if (audmux_type == IMX31_AUDMUX) {
+ if (i % 2) {
+ dev_err(&pdev->dev, "One pdcr value is missing in child node %s\n",
+ child->full_name);
+ continue;
+ }
+ imx_audmux_v2_configure_port(port, ptcr, pdcr);
+ } else {
+ imx_audmux_v1_configure_port(port, pcr);
+ }
+ }
+
+ return 0;
+}
+
static int imx_audmux_probe(struct platform_device *pdev)
{
struct resource *res;
@@ -275,6 +335,8 @@ static int imx_audmux_probe(struct platform_device *pdev)
if (audmux_type == IMX31_AUDMUX)
audmux_debugfs_init();
+ imx_audmux_parse_dt_defaults(pdev, pdev->dev.of_node);
+
return 0;
}
Adds a function to parse a default port configuration from devicetree. Signed-off-by: Markus Pargmann <mpa@pengutronix.de> --- .../devicetree/bindings/sound/imx-audmux.txt | 9 ++++ sound/soc/fsl/imx-audmux.c | 62 ++++++++++++++++++++++ 2 files changed, 71 insertions(+)