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[81.5.110.253]) by smtp.googlemail.com with ESMTPSA id i9sm1331120lfe.195.2022.01.11.05.13.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 11 Jan 2022 05:13:03 -0800 (PST) Subject: Re: [PATCH 1/3] iio: adc: sun4i-gpadc-iio: no temp sensor on R40 To: Jonathan Cameron , Maxime Ripard Cc: Chen-Yu Tsai , linux-sunxi@lists.linux.dev, Lee Jones , Rob Herring , devicetree@vger.kernel.org, Jernej Skrabec , linux-arm-kernel@lists.infradead.org, linux-iio@vger.kernel.org References: <20211119191456.510435-1-boger@wirenboard.com> <20211119191456.510435-2-boger@wirenboard.com> <20211122091132.yjudzei3bdqmnxq6@gilmour> <20211122124115.00005186@Huawei.com> From: Evgeny Boger Message-ID: <85db7e8a-2b9a-7e44-ec96-b804201a3491@wirenboard.com> Date: Tue, 11 Jan 2022 16:13:02 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 MIME-Version: 1.0 In-Reply-To: <20211122124115.00005186@Huawei.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-GB Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org 22.11.2021 15:41, Jonathan Cameron пишет: > On Mon, 22 Nov 2021 10:11:32 +0100 > Maxime Ripard wrote: > >> On Fri, Nov 19, 2021 at 10:14:54PM +0300, Evgeny Boger wrote: >>> R40 SoC has touchscreen controller also serving as general-purpose ADC. >>> The hardware is very similar to A31, except that R40 has separate >>> calibrated thermal sensor IP (handled by sun8i_thermal). >>> >>> Despite the temperature sensor in the RTP is never mentioned in >>> the R40 family user manuals, it appears to be working. However, >>> it's not very useful as it lacks calibration data and there is another >>> fully functioning temperature sensor anyway. >>> >>> This patch disables the temperature sensor in RTP/GPADC IP on R40. >>> >>> The reason for disabling the temperature sensor is that the IP >>> needs to be switched back and forth between RTP and GPADC modes for >>> temperature measurements. Not only this introduces delays, but it also >>> disturbs external circuitry by injecting current into ADC inputs. >>> >>> Signed-off-by: Evgeny Boger >> Acked-by: Maxime Ripard > +Cc linux-iio@vger.kernel.org > > I'm fine with this and assuming Lee is happy to pick it up + send > me an immutable branch in case anything crosses with it this cycle.. > > Acked-by: Jonathan Cameron Hi Jonathan! Is there anything else I should do to make this patch series accepted? > Thanks, > > Jonathan > >> Maxime >>