diff options
Diffstat (limited to 'sound/soc/mxs/mxs-saif.c')
| -rw-r--r-- | sound/soc/mxs/mxs-saif.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/sound/soc/mxs/mxs-saif.c b/sound/soc/mxs/mxs-saif.c index d31dc52fa862..9ad6dccf791d 100644 --- a/sound/soc/mxs/mxs-saif.c +++ b/sound/soc/mxs/mxs-saif.c @@ -24,6 +24,7 @@ #include <linux/slab.h> #include <linux/dma-mapping.h> #include <linux/clk.h> +#include <linux/clk-provider.h> #include <linux/delay.h> #include <linux/time.h> #include <linux/fsl/mxs-dma.h> @@ -662,6 +663,33 @@ static irqreturn_t mxs_saif_irq(int irq, void *dev_id) return IRQ_HANDLED; } +static int mxs_saif_mclk_init(struct platform_device *pdev) +{ + struct mxs_saif *saif = platform_get_drvdata(pdev); + struct device_node *np = pdev->dev.of_node; + struct clk *clk; + int ret; + + clk = clk_register_divider(&pdev->dev, "mxs_saif_mclk", + __clk_get_name(saif->clk), 0, + saif->base + SAIF_CTRL, + BP_SAIF_CTRL_BITCLK_MULT_RATE, 3, + 0, NULL); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + if (ret == -EEXIST) + return 0; + dev_err(&pdev->dev, "failed to register mclk: %d\n", ret); + return PTR_ERR(clk); + } + + ret = of_clk_add_provider(np, of_clk_src_simple_get, clk); + if (ret) + return ret; + + return 0; +} + static int mxs_saif_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; @@ -769,6 +797,13 @@ static int mxs_saif_probe(struct platform_device *pdev) platform_set_drvdata(pdev, saif); + /* We only support saif0 being tx and clock master */ + if (saif->id == 0) { + ret = mxs_saif_mclk_init(pdev); + if (ret) + dev_warn(&pdev->dev, "failed to init clocks\n"); + } + ret = snd_soc_register_component(&pdev->dev, &mxs_saif_component, &mxs_saif_dai, 1); if (ret) { |