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received-spf: None (protection.outlook.com: microchip.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: HIdHRw7e5vxcwsxgEObO2GThtq8xMUL6VEcYpbHpLtHQSAFQ0FKVJH/EwYmsk5JqE0B0gaISAaApY74pDARLbKqUIaRJjxT9/GjvFcHnGMsq/BCJT8ix1DfDcz9uV6+BBXP0MjiQRYDYQXjbR0IJgShh2H/PFwgXqjhWKdhC6gil7GV9lCr7GGilRpGrZrAE8aNcxyzgSQu5nHIOeDCB10GTgUwxqsu1553VLM+Am6OBoMv5w5oxp0v00Z4k5Hq1HBtdhyxX0weK8CjWOkfaUdYiziuz+LJ1rw6EmNGuLq3TPkYSTBqoFfC3m3fSdsVTKk5QgcpMWTOe7Hqj2XRHVHZ5PsXyrYacC1NNBOz5fk3OjfgurjeOU8azZF3YV/J+ccDqqI/NbiKwalw69yGK3sFwCkHLQpI3uCRKE44A5x8= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: ecbad4ae-85e7-4217-2ebe-08d695bb9e21 X-MS-Exchange-CrossTenant-originalarrivaltime: 18 Feb 2019 16:10:35.0010 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-id: 3f4057f3-b418-4d4e-ba84-d55b4e897d88 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR11MB1448 X-OriginatorOrg: microchip.com Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Codrin Ciubotariu The on-chip PLL can be disabled if on the MCLKI pin we have an external clock at 512 x fs. This clock can be used as direct internal clock for ADCs or DACs. To support this, we add an extra clock id that can be configured using the set_sysclk() callback. Signed-off-by: Codrin Ciubotariu --- sound/soc/codecs/ad193x.c | 26 +++++++++++++++++++++++++- sound/soc/codecs/ad193x.h | 8 ++++++++ 2 files changed, 33 insertions(+), 1 deletion(-) diff --git a/sound/soc/codecs/ad193x.c b/sound/soc/codecs/ad193x.c index f8cf182518a3..96d7cb2e4a56 100644 --- a/sound/soc/codecs/ad193x.c +++ b/sound/soc/codecs/ad193x.c @@ -100,6 +100,15 @@ static const struct snd_soc_dapm_widget ad193x_adc_wid= gets[] =3D { SND_SOC_DAPM_INPUT("ADC2IN"), }; =20 +static int ad193x_check_pll(struct snd_soc_dapm_widget *source, + struct snd_soc_dapm_widget *sink) +{ + struct snd_soc_component *component =3D snd_soc_dapm_to_component(source-= >dapm); + struct ad193x_priv *ad193x =3D snd_soc_component_get_drvdata(component); + + return !!ad193x->sysclk; +} + static const struct snd_soc_dapm_route audio_paths[] =3D { { "DAC", NULL, "SYSCLK" }, { "DAC Output", NULL, "DAC" }, @@ -108,7 +117,7 @@ static const struct snd_soc_dapm_route audio_paths[] = =3D { { "DAC2OUT", NULL, "DAC Output" }, { "DAC3OUT", NULL, "DAC Output" }, { "DAC4OUT", NULL, "DAC Output" }, - { "SYSCLK", NULL, "PLL_PWR" }, + { "SYSCLK", NULL, "PLL_PWR", &ad193x_check_pll }, }; =20 static const struct snd_soc_dapm_route ad193x_adc_audio_paths[] =3D { @@ -276,7 +285,22 @@ static int ad193x_set_dai_sysclk(struct snd_soc_dai *c= odec_dai, int clk_id, unsigned int freq, int dir) { struct snd_soc_component *component =3D codec_dai->component; + struct snd_soc_dapm_context *dapm =3D snd_soc_component_get_dapm(componen= t); struct ad193x_priv *ad193x =3D snd_soc_component_get_drvdata(component); + + if (clk_id =3D=3D AD193X_SYSCLK_MCLK) { + /* MCLK must be 512 x fs */ + if (dir =3D=3D SND_SOC_CLOCK_OUT || freq !=3D 24576000) + return -EINVAL; + + regmap_update_bits(ad193x->regmap, AD193X_PLL_CLK_CTRL1, + AD193X_PLL_SRC_MASK, + AD193X_PLL_DAC_SRC_MCLK | + AD193X_PLL_CLK_SRC_MCLK); + + snd_soc_dapm_sync(dapm); + return 0; + } switch (freq) { case 12288000: case 18432000: diff --git a/sound/soc/codecs/ad193x.h b/sound/soc/codecs/ad193x.h index 8b1e65f928d2..27d6afbd7dfb 100644 --- a/sound/soc/codecs/ad193x.h +++ b/sound/soc/codecs/ad193x.h @@ -31,6 +31,11 @@ int ad193x_probe(struct device *dev, struct regmap *regm= ap, #define AD193X_PLL_INPUT_512 (2 << 1) #define AD193X_PLL_INPUT_768 (3 << 1) #define AD193X_PLL_CLK_CTRL1 0x01 +#define AD193X_PLL_SRC_MASK 0x03 +#define AD193X_PLL_DAC_SRC_PLL 0 +#define AD193X_PLL_DAC_SRC_MCLK 1 +#define AD193X_PLL_CLK_SRC_PLL (0 << 1) +#define AD193X_PLL_CLK_SRC_MCLK (1 << 1) #define AD193X_DAC_CTRL0 0x02 #define AD193X_DAC_POWERDOWN 0x01 #define AD193X_DAC_SERFMT_MASK 0xC0 @@ -96,4 +101,7 @@ int ad193x_probe(struct device *dev, struct regmap *regm= ap, =20 #define AD193X_NUM_REGS 17 =20 +#define AD193X_SYSCLK_PLL 0 +#define AD193X_SYSCLK_MCLK 1 + #endif --=20 2.17.1