diff options
| author | Sudheer Papothi <spapothi@codeaurora.org> | 2016-05-19 20:29:13 +0530 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2016-08-04 11:05:31 -0700 |
| commit | c5ee57ee2b2f368bd68e2caaf6718125a31927ae (patch) | |
| tree | 434d6cdb01a98161c960691817f860a4189c84a4 | |
| parent | 4966222ae1dd171c035b695e93db331f86d9a8a0 (diff) | |
drivers: mfd: wcd9xxx: Add support to configure dmic clock
DMIC clock on ECPP(Echo Cancellation Ping-Pong) path can be set to
lower clock rate to avoid power consumption. Change configures the
DMIC clock rate on ECPP path based on device tree settings.
CRs-fixed: 1022917
Change-Id: I03e1a7f5ef3cf1b1907c03a3d38965ce3a611bc4
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>
Signed-off-by: Vidyakumar Athota <vathota@codeaurora.org>
| -rw-r--r-- | Documentation/devicetree/bindings/sound/wcd_codec.txt | 8 | ||||
| -rw-r--r-- | drivers/mfd/wcd9xxx-utils.c | 10 | ||||
| -rwxr-xr-x | include/linux/mfd/wcd9xxx/pdata.h | 1 |
3 files changed, 19 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/sound/wcd_codec.txt b/Documentation/devicetree/bindings/sound/wcd_codec.txt index d585595f21c6..e37e7c2bea3c 100644 --- a/Documentation/devicetree/bindings/sound/wcd_codec.txt +++ b/Documentation/devicetree/bindings/sound/wcd_codec.txt @@ -92,6 +92,14 @@ Optional properties: involving DMIC will use the rate defined by cdc-dmic-sample-rate. + - qcom,cdc-ecpp-dmic-rate: Specifies the sample rate of digital mic in HZ to be + used by ECPP (Echo Cancellation Ping Pong) block + on the codec. The valid set of values are same + as that of cdc-dmic-sample-rate, but this rate will + only be used by ECPP and all other audio use cases + involving DMIC will use the rate defined by + cdc-dmic-sample-rate. + - qcom,cdc-dmic-clk-drv-strength: Specifies the drive strength for digital microphone clock in the codec. Accepted values are 2,4,8 and 16. The clock drive strentgh is in uA. Codec driver will diff --git a/drivers/mfd/wcd9xxx-utils.c b/drivers/mfd/wcd9xxx-utils.c index 22d61d96a11d..38286831a02c 100644 --- a/drivers/mfd/wcd9xxx-utils.c +++ b/drivers/mfd/wcd9xxx-utils.c @@ -298,6 +298,7 @@ struct wcd9xxx_pdata *wcd9xxx_populate_dt_data(struct device *dev) struct wcd9xxx_pdata *pdata; u32 dmic_sample_rate = WCD9XXX_DMIC_SAMPLE_RATE_UNDEFINED; u32 mad_dmic_sample_rate = WCD9XXX_DMIC_SAMPLE_RATE_UNDEFINED; + u32 ecpp_dmic_sample_rate = WCD9XXX_DMIC_SAMPLE_RATE_UNDEFINED; u32 dmic_clk_drive = WCD9XXX_DMIC_CLK_DRIVE_UNDEFINED; u32 prop_val; @@ -358,6 +359,15 @@ struct wcd9xxx_pdata *wcd9xxx_populate_dt_data(struct device *dev) pdata->mclk_rate, "mad_dmic_rate"); + if (!(wcd9xxx_read_of_property_u32(dev, "qcom,cdc-ecpp-dmic-rate", + &prop_val))) + ecpp_dmic_sample_rate = prop_val; + + pdata->ecpp_dmic_sample_rate = wcd9xxx_validate_dmic_sample_rate(dev, + ecpp_dmic_sample_rate, + pdata->mclk_rate, + "ecpp_dmic_rate"); + if (!(of_property_read_u32(dev->of_node, "qcom,cdc-dmic-clk-drv-strength", &prop_val))) diff --git a/include/linux/mfd/wcd9xxx/pdata.h b/include/linux/mfd/wcd9xxx/pdata.h index 52277f26b5a4..7bf2bff2f173 100755 --- a/include/linux/mfd/wcd9xxx/pdata.h +++ b/include/linux/mfd/wcd9xxx/pdata.h @@ -189,6 +189,7 @@ struct wcd9xxx_pdata { u32 mclk_rate; u32 dmic_sample_rate; u32 mad_dmic_sample_rate; + u32 ecpp_dmic_sample_rate; u32 dmic_clk_drv; u16 use_pinctrl; }; |