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