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Wed, 19 Aug 2026 09:42:43 -0700 (PDT) X-Received: by 2002:a05:6a00:2e9c:b0:846:bc81:3e29 with SMTP id d2e1a72fcca58-851d381a661mr9382902b3a.2.1787157762897; Wed, 19 Aug 2026 09:42:42 -0700 (PDT) Received: from [192.168.0.6] ([49.204.111.201]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-851d33b635bsm881060b3a.26.2026.08.19.09.42.38 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 19 Aug 2026 09:42:42 -0700 (PDT) Message-ID: <15e37bb5-db13-4c09-b5c5-a9e92030eb60@oss.qualcomm.com> Date: Wed, 19 Aug 2026 22:12:36 +0530 Precedence: bulk X-Mailing-List: linux-spi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 2/2] spi: qcom-geni: Use GPIO to notify master of SPI target activity To: Konrad Dybcio , Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Andy Gross , Bjorn Andersson Cc: chandana.chiluveru@oss.qualcomm.com, Krzysztof Kozlowski , linux-arm-msm@vger.kernel.org, linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260818-use_gpio_to_notify_master_of_spi_target_activity-v3-0-e1c9e0dabbda@oss.qualcomm.com> <20260818-use_gpio_to_notify_master_of_spi_target_activity-v3-2-e1c9e0dabbda@oss.qualcomm.com> <09f10e30-f613-4a22-941c-1db63b190186@oss.qualcomm.com> Content-Language: en-US From: Praveen Talari In-Reply-To: <09f10e30-f613-4a22-941c-1db63b190186@oss.qualcomm.com> Content-Type: text/plain; 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This allows the target to explicitly signal its >> availability to the master and ensures the GPIO is released in all error >> and completion paths, preventing the master from observing a stale or >> incorrect target-ready indication. > [...] > >> + if (spi->target && mas->target_gpio) >> + gpiod_set_value(mas->target_gpio, 0); > FWIW it seems like the gpiod APIs can eat nullptrs Oh, let me review and update. > > [...] > >> @@ -1131,8 +1144,16 @@ static int spi_geni_probe(struct platform_device *pdev) >> init_completion(&mas->rx_reset_done); >> spin_lock_init(&mas->lock); >> >> - if (spi->target) >> + if (spi->target) { >> spi->target_abort = spi_geni_target_abort; >> + mas->target_gpio = devm_gpiod_get_index_optional(dev, "ready", 0, >> + GPIOD_OUT_LOW); > Is there a reason for the get_index_ variant specifically? There is no specific reason. i just had choosen with index. > > i.e. why not just devm_gpiod_get_optional()? Yes, we can use it. Thanks, Praveen Talari > > Konrad