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Mon, 17 Feb 2020 22:17:47 -0500 (EST) Subject: Re: [RFC PATCH 01/34] ASoC: dt-bindings: Add a separate compatible for the A64 codec To: Chen-Yu Tsai References: <20200217064250.15516-1-samuel@sholland.org> <20200217064250.15516-2-samuel@sholland.org> From: Samuel Holland Message-ID: Date: Mon, 17 Feb 2020 21:17:47 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200217_191756_581811_F28F7552 X-CRM114-Status: GOOD ( 15.65 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree , Linux-ALSA , Ondrej Jirman , linux-kernel , Takashi Iwai , Liam Girdwood , Rob Herring , Jaroslav Kysela , Mark Brown , Maxime Ripard , linux-arm-kernel Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 2/17/20 3:49 AM, Chen-Yu Tsai wrote: > On Mon, Feb 17, 2020 at 2:42 PM Samuel Holland wrote: >> >> The digital codec in the A64 is largely compatible with the one in the >> A33, with two changes: >> - It is missing some muxing options for AIF1/2/3 (not currently >> supported by the driver) > > Is this at the pinctrl level or mixer level? If it's at the pinctrl level > then it's out of the scope of this driver/binding. It could very well have > those signals, just that they aren't routed outside the SoC. This is in reference to the muxes shown at the top of the A33 diagram, above the I2S/PCM interfaces. These appear to map to bits 0-6 of AIF3_SGP_CTRL, which are marked as reserved on the A64 and the AC100. Comparing the three datasheets in a bit more detail (but by no means exhaustively): - The A64 has a second DRC block, unlike the A33 and AC100. - The jack detection registers (0x310-0x318) are present on the A64 and AC100, but undocumented/missing on the A33. So there are enough differences to warrant a new compatible, but since none of the unique functionality is used by the driver (even after this series), a fallback should work. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel