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Subject[PATCH v2 02/21] ASoC: samsung: i2s: Move clk supplier data to common driver data structure
Date
Having the clocks provider data in struct samsung_i2s_priv, i.e. per the I2S
controller instance, rather than per CPU DAI better models the hardware and
simplifies the code a little. The clock provider is common for both DAIs.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
---
sound/soc/samsung/i2s.c | 68 ++++++++++++++++++++---------------------
1 file changed, 33 insertions(+), 35 deletions(-)

diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
index 273620914471..fffc76ab60da 100644
--- a/sound/soc/samsung/i2s.c
+++ b/sound/soc/samsung/i2s.c
@@ -99,9 +99,7 @@ struct i2s_dai {

spinlock_t *lock;

- /* Below fields are only valid if this is the primary FIFO */
- struct clk *clk_table[3];
- struct clk_onecell_data clk_data;
+ struct samsung_i2s_priv *priv;
};

/* Lock for cross i/f checks */
@@ -118,6 +116,10 @@ struct samsung_i2s_priv {
struct i2s_dai *dai;
struct snd_soc_dai_driver *dai_drv;
int num_dais;
+
+ /* The clock provider's data */
+ struct clk *clk_table[3];
+ struct clk_onecell_data clk_data;
};

struct i2s_dai *samsung_i2s_get_pri_dai(struct device *dev)
@@ -625,11 +627,10 @@ static int i2s_set_sysclk(struct snd_soc_dai *dai,
return ret;
}

-static int i2s_set_fmt(struct snd_soc_dai *dai,
- unsigned int fmt)
+static int i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
+ struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
struct i2s_dai *i2s = to_info(dai);
- struct i2s_dai *other = get_other_dai(i2s);
int lrp_shift, sdf_shift, sdf_mask, lrp_rlow, mod_slave;
u32 mod, tmp = 0;
unsigned long flags;
@@ -687,8 +688,7 @@ static int i2s_set_fmt(struct snd_soc_dai *dai,
* CLK_I2S_RCLK_SRC clock is not exposed so we ensure any
* clock configuration assigned in DT is not overwritten.
*/
- if (i2s->rclk_srcrate == 0 && i2s->clk_data.clks == NULL &&
- other->clk_data.clks == NULL)
+ if (i2s->rclk_srcrate == 0 && priv->clk_data.clks == NULL)
i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
0, SND_SOC_CLOCK_IN);
break;
@@ -725,8 +725,8 @@ static int i2s_set_fmt(struct snd_soc_dai *dai,
static int i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
{
+ struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
struct i2s_dai *i2s = to_info(dai);
- struct i2s_dai *other = get_other_dai(i2s);
u32 mod, mask = 0, val = 0;
struct clk *rclksrc;
unsigned long flags;
@@ -811,10 +811,7 @@ static int i2s_hw_params(struct snd_pcm_substream *substream,

i2s->frmclk = params_rate(params);

- rclksrc = i2s->clk_table[CLK_I2S_RCLK_SRC];
- if (!rclksrc || IS_ERR(rclksrc))
- rclksrc = other->clk_table[CLK_I2S_RCLK_SRC];
-
+ rclksrc = priv->clk_table[CLK_I2S_RCLK_SRC];
if (rclksrc && !IS_ERR(rclksrc))
i2s->rclk_srcrate = clk_get_rate(rclksrc);

@@ -1221,31 +1218,30 @@ static int i2s_runtime_resume(struct device *dev)
}
#endif /* CONFIG_PM */

-static void i2s_unregister_clocks(struct i2s_dai *i2s)
+static void i2s_unregister_clocks(struct samsung_i2s_priv *priv)
{
int i;

- for (i = 0; i < i2s->clk_data.clk_num; i++) {
- if (!IS_ERR(i2s->clk_table[i]))
- clk_unregister(i2s->clk_table[i]);
+ for (i = 0; i < priv->clk_data.clk_num; i++) {
+ if (!IS_ERR(priv->clk_table[i]))
+ clk_unregister(priv->clk_table[i]);
}
}

-static void i2s_unregister_clock_provider(struct platform_device *pdev)
+static void i2s_unregister_clock_provider(struct samsung_i2s_priv *priv)
{
- struct i2s_dai *i2s = samsung_i2s_get_pri_dai(&pdev->dev);
-
- of_clk_del_provider(pdev->dev.of_node);
- i2s_unregister_clocks(i2s);
+ of_clk_del_provider(priv->pdev->dev.of_node);
+ i2s_unregister_clocks(priv);
}

-static int i2s_register_clock_provider(struct platform_device *pdev)
+
+static int i2s_register_clock_provider(struct samsung_i2s_priv *priv)
{

const char * const i2s_clk_desc[] = { "cdclk", "rclk_src", "prescaler" };
const char *clk_name[2] = { "i2s_opclk0", "i2s_opclk1" };
const char *p_names[2] = { NULL };
- struct device *dev = &pdev->dev;
+ struct device *dev = &priv->pdev->dev;
struct i2s_dai *i2s = samsung_i2s_get_pri_dai(dev);
const struct samsung_i2s_variant_regs *reg_info = i2s->variant_regs;
const char *i2s_clk_name[ARRAY_SIZE(i2s_clk_desc)];
@@ -1277,37 +1273,37 @@ static int i2s_register_clock_provider(struct platform_device *pdev)
u32 val = readl(i2s->addr + I2SPSR);
writel(val | PSR_PSREN, i2s->addr + I2SPSR);

- i2s->clk_table[CLK_I2S_RCLK_SRC] = clk_register_mux(dev,
+ priv->clk_table[CLK_I2S_RCLK_SRC] = clk_register_mux(dev,
i2s_clk_name[CLK_I2S_RCLK_SRC], p_names,
ARRAY_SIZE(p_names),
CLK_SET_RATE_NO_REPARENT | CLK_SET_RATE_PARENT,
i2s->addr + I2SMOD, reg_info->rclksrc_off,
1, 0, i2s->lock);

- i2s->clk_table[CLK_I2S_RCLK_PSR] = clk_register_divider(dev,
+ priv->clk_table[CLK_I2S_RCLK_PSR] = clk_register_divider(dev,
i2s_clk_name[CLK_I2S_RCLK_PSR],
i2s_clk_name[CLK_I2S_RCLK_SRC],
CLK_SET_RATE_PARENT,
i2s->addr + I2SPSR, 8, 6, 0, i2s->lock);

p_names[0] = i2s_clk_name[CLK_I2S_RCLK_PSR];
- i2s->clk_data.clk_num = 2;
+ priv->clk_data.clk_num = 2;
}

- i2s->clk_table[CLK_I2S_CDCLK] = clk_register_gate(dev,
+ priv->clk_table[CLK_I2S_CDCLK] = clk_register_gate(dev,
i2s_clk_name[CLK_I2S_CDCLK], p_names[0],
CLK_SET_RATE_PARENT,
i2s->addr + I2SMOD, reg_info->cdclkcon_off,
CLK_GATE_SET_TO_DISABLE, i2s->lock);

- i2s->clk_data.clk_num += 1;
- i2s->clk_data.clks = i2s->clk_table;
+ priv->clk_data.clk_num += 1;
+ priv->clk_data.clks = priv->clk_table;

ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
- &i2s->clk_data);
+ &priv->clk_data);
if (ret < 0) {
dev_err(dev, "failed to add clock provider: %d\n", ret);
- i2s_unregister_clocks(i2s);
+ i2s_unregister_clocks(priv);
}

return ret;
@@ -1426,6 +1422,7 @@ static int samsung_i2s_probe(struct platform_device *pdev)
pri_dai->dma_capture.addr_width = 4;
pri_dai->quirks = quirks;
pri_dai->variant_regs = i2s_dai_data->i2s_variant_regs;
+ pri_dai->priv = priv;

if (quirks & QUIRK_PRI_6CHAN)
pri_dai->drv->playback.channels_max = 6;
@@ -1454,6 +1451,7 @@ static int samsung_i2s_probe(struct platform_device *pdev)
sec_dai->quirks = quirks;
sec_dai->idma_playback.addr = idma_addr;
sec_dai->pri_dai = pri_dai;
+ sec_dai->priv = priv;
pri_dai->sec_dai = sec_dai;

ret = i2s_create_secondary_device(priv);
@@ -1485,11 +1483,11 @@ static int samsung_i2s_probe(struct platform_device *pdev)
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);

- ret = i2s_register_clock_provider(pdev);
+ ret = i2s_register_clock_provider(priv);
if (ret < 0)
goto err_disable_pm;

- pri_dai->op_clk = clk_get_parent(pri_dai->clk_table[CLK_I2S_RCLK_SRC]);
+ pri_dai->op_clk = clk_get_parent(priv->clk_table[CLK_I2S_RCLK_SRC]);

return 0;

@@ -1513,7 +1511,7 @@ static int samsung_i2s_remove(struct platform_device *pdev)
pm_runtime_get_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);

- i2s_unregister_clock_provider(pdev);
+ i2s_unregister_clock_provider(priv);
clk_disable_unprepare(pri_dai->clk);
pm_runtime_put_noidle(&pdev->dev);
i2s_delete_secondary_device(priv);
--
2.20.1
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