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| author | Tomasz Figa <t.figa@samsung.com> | 2014-01-09 17:24:23 +0100 |
|---|---|---|
| committer | Sylwester Nawrocki <s.nawrocki@samsung.com> | 2014-09-10 02:49:42 -0700 |
| commit | 3fadf6f0f16cf0e1e390439cc07fe72f1341170a (patch) | |
| tree | 76377805425a56acd6641e437f3d16aee8f3736a | |
| parent | f8dd43ef2a761653d5903db5fa7cbe5ad34809b9 (diff) | |
| download | linux-3.10-3fadf6f0f16cf0e1e390439cc07fe72f1341170a.tar.gz linux-3.10-3fadf6f0f16cf0e1e390439cc07fe72f1341170a.tar.bz2 linux-3.10-3fadf6f0f16cf0e1e390439cc07fe72f1341170a.zip | |
sound: soc/samsung: i2s: Handle bus clock gating
This patch adds handling of controller bus clock gating to make sure
that the clock is enabled before starting operation.
Change-Id: Ib7069487e3d4477fc6b7d09e411b06bfc3f8f263
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
| -rw-r--r-- | sound/soc/samsung/i2s.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c index b144817bcf4..95fab0f26a0 100644 --- a/sound/soc/samsung/i2s.c +++ b/sound/soc/samsung/i2s.c @@ -78,6 +78,8 @@ struct i2s_dai { struct clk *dout_bus; /* i2s clock's divider */ struct clk *dout_i2s; + /* Controller's bus clock */ + struct clk *bus_clk; /* Clock for generating I2S signals */ struct clk *op_clk; /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */ @@ -1245,6 +1247,10 @@ static int samsung_i2s_probe(struct platform_device *pdev) } } + pri_dai->bus_clk = devm_clk_get(&pdev->dev, "iis"); + if (!IS_ERR(pri_dai->bus_clk)) + clk_prepare_enable(pri_dai->bus_clk); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(&pdev->dev, "Unable to get I2S SFR address\n"); @@ -1336,6 +1342,9 @@ static int samsung_i2s_remove(struct platform_device *pdev) res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (res) release_mem_region(res->start, resource_size(res)); + + if (!IS_ERR(i2s->bus_clk)) + clk_disable_unprepare(i2s->bus_clk); } i2s->pri_dai = NULL; |