diff options
| -rw-r--r-- | Documentation/devicetree/bindings/sound/imx-audmux.txt | 9 | ||||
| -rw-r--r-- | sound/soc/fsl/imx-audmux.c | 62 |
2 files changed, 71 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/sound/imx-audmux.txt b/Documentation/devicetree/bindings/sound/imx-audmux.txt index 215aa981721..f88a00e54c6 100644 --- a/Documentation/devicetree/bindings/sound/imx-audmux.txt +++ b/Documentation/devicetree/bindings/sound/imx-audmux.txt @@ -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 { diff --git a/sound/soc/fsl/imx-audmux.c b/sound/soc/fsl/imx-audmux.c index 1a5da1e1307..103d1b02049 100644 --- a/sound/soc/fsl/imx-audmux.c +++ b/sound/soc/fsl/imx-audmux.c @@ -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; } |