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a=rsa-sha256; c=relaxed/relaxed; t=1598435544; s=strato-dkim-0002; d=gerhold.net; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: X-RZG-CLASS-ID:X-RZG-AUTH:From:Subject:Sender; bh=O63GLG7sddoCYObzLYc9FbVF3AO3J5EaI5KdyvqBGk8=; b=gBZ3tEe0CUvZDHt89MxO62Ah1W0m78lt+rlTA0JEQ4Fgv09Mfy/Z266FIsa5gagYgP c/O2HCp1skJYbW9X27DLPkts2TXF0T13oK8/Kf0pblkdYzaJE+FHlmVBieQYYyBMcsc3 mUwjrAI8egiI4ey70rQk9uR6MgTkGNrUnHRA9tSP0v8Oc6BffSUKLYgN2h9KBiyQaePc RHE+MeUWc1LhkG09padaNJLUWT/Lvkx8IWknvDLGhJB+EGpweK/vo0f61TQM701AszKt oBM9aNwKO6klo64sYdoj9n6b7VAuEgvkyTYAPW9gQTe6TDhnguVLITAVauaieywcya7N M2TQ== X-RZG-AUTH: ":P3gBZUipdd93FF5ZZvYFPugejmSTVR2nRPhVORvLd4SsytBXS7IYBkLahKxB4W6NYn8D" X-RZG-CLASS-ID: mo00 Received: from localhost.localdomain by smtp.strato.de (RZmta 46.10.7 DYNA|AUTH) with ESMTPSA id g0b6c1w7Q9qIl6W (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Wed, 26 Aug 2020 11:52:18 +0200 (CEST) From: Stephan Gerhold To: Mark Brown Subject: [PATCH v2 2/2] ASoC: qcom: common: Parse auxiliary devices from device tree Date: Wed, 26 Aug 2020 11:51:41 +0200 Message-Id: <20200826095141.94017-3-stephan@gerhold.net> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200826095141.94017-1-stephan@gerhold.net> References: <20200826095141.94017-1-stephan@gerhold.net> MIME-Version: 1.0 Cc: devicetree@vger.kernel.org, alsa-devel@alsa-project.org, Banajit Goswami , Stephan Gerhold , linux-arm-msm@vger.kernel.org, Patrick Lai , Liam Girdwood , Rob Herring , Srinivas Kandagatla X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" In some cases we need to probe additional audio components that do not appear as part of the DAI links specified in the device tree. Examples for this are auxiliary devices such as analog amplifiers or codecs. The ASoC core provides a way to probe these components by adding them to snd_soc_card->aux_dev. We can use the snd_soc_of_parse_aux_devs() function to parse them from the device tree. As an example for this, some MSM8916 smartphones have an analog speaker amplifier connected to the HPHR output. With the new property this can be modelled as follows: speaker-amp: audio-amplifier { compatible = "simple-audio-amplifier"; enable-gpios = <&msmgpio 114 GPIO_ACTIVE_HIGH>; sound-name-prefix = "Speaker Amp"; }; &sound { aux-devs = <&speaker_amp>; audio-routing = "Speaker Amp IN", "HPHR"; }; Cc: Srinivas Kandagatla Signed-off-by: Stephan Gerhold --- sound/soc/qcom/common.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sound/soc/qcom/common.c b/sound/soc/qcom/common.c index 5194d90ddb96..fe6e778c31c0 100644 --- a/sound/soc/qcom/common.c +++ b/sound/soc/qcom/common.c @@ -39,6 +39,10 @@ int qcom_snd_parse_of(struct snd_soc_card *card) return ret; } + ret = snd_soc_of_parse_aux_devs(card, "aux-devs"); + if (ret) + return ret; + /* Populate links */ num_links = of_get_child_count(dev->of_node);