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([2600:8803:e7e4:500:99c2:f16e:201c:3bb5]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-459f1d793c9sm4702369fac.9.2026.08.08.11.39.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 08 Aug 2026 11:39:44 -0700 (PDT) Message-ID: Date: Sat, 8 Aug 2026 13:39:42 -0500 Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 6/9] iio: adc: ti-ads1262: support excitation currents To: Kurt Borja , Jonathan Cameron , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Linus Walleij , Bartosz Golaszewski Cc: =?UTF-8?Q?Nuno_S=C3=A1?= , Andy Shevchenko , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org References: <20260807-ads126x-v3-0-f89925d72792@gmail.com> <20260807-ads126x-v3-6-f89925d72792@gmail.com> Content-Language: en-US From: David Lechner In-Reply-To: <20260807-ads126x-v3-6-f89925d72792@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 8/7/26 10:58 PM, Kurt Borja wrote: > Support the two IDAC excitation current sources. Each channel can route > its IDAC1/IDAC2 outputs to a pin via the "excitation-channels" property > and select a magnitude via "excitation-current-nanoamp". > Reviewed-by: David Lechner > @@ -1150,7 +1192,58 @@ static int ads1262_parse_channel_node(struct ads1262 *st, > } > } > > + if (fwnode_property_present(node, "excitation-channels")) { > + count = fwnode_property_count_u32(node, "excitation-channels"); > + if (count < 0) > + return dev_err_probe(dev, count, > + "%s: failed to count excitation-channels\n", > + fwnode_get_name(node)); > + > + pins[0] = ADS1262_IDACMUX_NO_CONN; > + pins[1] = ADS1262_IDACMUX_NO_CONN; > + ret = fwnode_property_read_u32_array(node, "excitation-channels", > + pins, min(count, ARRAY_SIZE(pins))); > + if (ret) > + return dev_err_probe(dev, ret, "%s: failed to read excitation-channels\n", > + fwnode_get_name(node)); > + if (pins[0] > ADS1262_IDACMUX_NO_CONN || pins[1] > ADS1262_IDACMUX_NO_CONN) > + return dev_err_probe(dev, -EINVAL, "%s: excitation-channels not in range\n", > + fwnode_get_name(node)); > + chan->idac_mux[0] = pins[0]; > + chan->idac_mux[1] = pins[1]; > + > + mags[0] = 0; > + mags[1] = 0; > + ret = fwnode_property_read_u32_array(node, "excitation-current-nanoamp", > + mags, min(count, ARRAY_SIZE(mags))); > + if (ret == -EOVERFLOW) > + return dev_err_probe(dev, ret, > + "%s: excitation-current-nanoamp size mismatch\n", > + fwnode_get_name(node)); I don't think we need a special error message for this case. The error code will already be printed. > + if (ret) > + return dev_err_probe(dev, ret, > + "%s: failed to read excitation-current-nanoamp\n", > + fwnode_get_name(node)); > +