[PATCH v1 3/3] ASoC: zx-i2s: support zx296718 SoC for ZTE's i2s controller driver
From: Baoyou Xie <hidden>
Date: 2017-02-06 13:52:47
Also in:
alsa-devel, linux-clk, linux-devicetree, lkml
Subsystem:
sound, sound - soc layer / dynamic audio power management (asoc), the rest · Maintainers:
Jaroslav Kysela, Takashi Iwai, Liam Girdwood, Mark Brown, Linus Torvalds
This patch adds zx296718 SoC support for ZTE's i2s controller driver. Signed-off-by: Baoyou Xie <redacted> --- sound/soc/zte/zx-i2s.c | 49 ++++++++++++++++++++++++++++++++++++++++--------- 1 file changed, 40 insertions(+), 9 deletions(-)
diff --git a/sound/soc/zte/zx-i2s.c b/sound/soc/zte/zx-i2s.c
index ed7a56d..68d590be 100644
--- a/sound/soc/zte/zx-i2s.c
+++ b/sound/soc/zte/zx-i2s.c@@ -95,12 +95,13 @@ struct zx_i2s_info { struct snd_dmaengine_dai_dma_data dma_playback; struct snd_dmaengine_dai_dma_data dma_capture; - struct clk *dai_clk; + struct clk *dai_wclk, *dai_pclk; void __iomem *reg_base; int master; resource_size_t mapbase; }; + static void zx_i2s_tx_en(void __iomem *base, bool on) { unsigned long val;
@@ -218,6 +219,17 @@ static int zx_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) return 0; } +static void zx_i2s_set_clk(struct zx_i2s_info *i2s, + unsigned int ch_num, unsigned int sample_rate) +{ + unsigned long val = sample_rate * ch_num * CLK_RAT; + + clk_set_rate(i2s->dai_wclk, val); + + if (i2s->dai_pclk) + clk_set_rate(i2s->dai_pclk, val); +} + static int zx_i2s_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *socdai)
@@ -275,8 +287,8 @@ static int zx_i2s_hw_params(struct snd_pcm_substream *substream, writel_relaxed(val, i2s->reg_base + ZX_I2S_TIMING_CTRL); if (i2s->master) - ret = clk_set_rate(i2s->dai_clk, - params_rate(params) * ch_num * CLK_RAT); + zx_i2s_set_clk(i2s, ch_num, params_rate(params)); + return ret; }
@@ -328,8 +340,19 @@ static int zx_i2s_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct zx_i2s_info *zx_i2s = dev_get_drvdata(dai->dev); + int ret; + + ret = clk_prepare_enable(zx_i2s->dai_wclk); + if (ret) + return ret; - return clk_prepare_enable(zx_i2s->dai_clk); + ret = clk_prepare_enable(zx_i2s->dai_pclk); + if (ret) { + clk_disable_unprepare(zx_i2s->dai_wclk); + return ret; + } + + return ret; } static void zx_i2s_shutdown(struct snd_pcm_substream *substream,
@@ -337,7 +360,8 @@ static void zx_i2s_shutdown(struct snd_pcm_substream *substream, { struct zx_i2s_info *zx_i2s = dev_get_drvdata(dai->dev); - clk_disable_unprepare(zx_i2s->dai_clk); + clk_disable_unprepare(zx_i2s->dai_wclk); + clk_disable_unprepare(zx_i2s->dai_pclk); } static struct snd_soc_dai_ops zx_i2s_dai_ops = {
@@ -381,10 +405,16 @@ static int zx_i2s_probe(struct platform_device *pdev) if (!zx_i2s) return -ENOMEM; - zx_i2s->dai_clk = devm_clk_get(&pdev->dev, "tx"); - if (IS_ERR(zx_i2s->dai_clk)) { - dev_err(&pdev->dev, "Fail to get clk\n"); - return PTR_ERR(zx_i2s->dai_clk); + zx_i2s->dai_wclk = devm_clk_get(&pdev->dev, "tx"); + if (IS_ERR(zx_i2s->dai_wclk)) { + dev_err(&pdev->dev, "Fail to get wclk\n"); + return PTR_ERR(zx_i2s->dai_wclk); + } + + zx_i2s->dai_pclk = devm_clk_get(&pdev->dev, "pclk"); + if (IS_ERR(zx_i2s->dai_pclk)) { + dev_info(&pdev->dev, "have no pclk\n"); + zx_i2s->dai_pclk = NULL; } res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -414,6 +444,7 @@ static int zx_i2s_probe(struct platform_device *pdev) static const struct of_device_id zx_i2s_dt_ids[] = { { .compatible = "zte,zx296702-i2s", }, + { .compatible = "zte,zx296718-i2s", }, {} }; MODULE_DEVICE_TABLE(of, zx_i2s_dt_ids);
--
2.7.4