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Tue, 24 Jun 2025 06:19:24 -0700 (PDT) Received: from [127.0.1.1] ([2a01:cb1d:dc:7e00:34d2:109c:3293:19e9]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-453646fd74asm141302195e9.22.2025.06.24.06.19.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Jun 2025 06:19:24 -0700 (PDT) From: Bartosz Golaszewski Date: Tue, 24 Jun 2025 15:19:13 +0200 Subject: [PATCH RFT 2/6] gpio: mmio: get chip label and GPIO base from device properties MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250624-gpio-mmio-pdata-v1-2-a58c72eb556a@linaro.org> References: <20250624-gpio-mmio-pdata-v1-0-a58c72eb556a@linaro.org> In-Reply-To: <20250624-gpio-mmio-pdata-v1-0-a58c72eb556a@linaro.org> To: Linus Walleij , Bartosz Golaszewski , Lee Jones , Liviu Dudau , Sudeep Holla , Lorenzo Pieralisi , Aaro Koskinen , Janusz Krzysztofik , Tony Lindgren , Russell King , Krzysztof Kozlowski , Alim Akhtar Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, patches@opensource.cirrus.com, linux-samsung-soc@vger.kernel.org, Bartosz Golaszewski X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; 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a=openpgp; fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250624_141928_062671_9E60F925 X-CRM114-Status: GOOD ( 15.68 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Bartosz Golaszewski Ahead of removing struct bgpio_pdata support from the gpio-mmio generic module, let's add support for getting the relevant values from generic device properties. "label" is a semi-standardized property in some GPIO drivers so let's go with it. There's no standard "base" property, so let's use the name "gpio-mmio,base" to tie it to this driver specifically. The number of GPIOs will be retrieved using gpiochip_get_ngpios() so there's no need to look it up in the software node. Signed-off-by: Bartosz Golaszewski --- drivers/gpio/gpio-mmio.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/gpio/gpio-mmio.c b/drivers/gpio/gpio-mmio.c index ffe6b6f6cc9b1e9341e1c42cf8fee917e0147bf3..8108aa8e6b86ae3d0b520a0f22a09689ab1d9bc5 100644 --- a/drivers/gpio/gpio-mmio.c +++ b/drivers/gpio/gpio-mmio.c @@ -737,6 +737,9 @@ MODULE_DEVICE_TABLE(of, bgpio_of_match); static struct bgpio_pdata *bgpio_parse_fw(struct device *dev, unsigned long *flags) { struct bgpio_pdata *pdata; + const char *label; + unsigned int base; + int ret; if (!dev_fwnode(dev)) return NULL; @@ -753,6 +756,14 @@ static struct bgpio_pdata *bgpio_parse_fw(struct device *dev, unsigned long *fla if (device_property_read_bool(dev, "no-output")) *flags |= BGPIOF_NO_OUTPUT; + ret = device_property_read_string(dev, "label", &label); + if (!ret) + pdata->label = label; + + ret = device_property_read_u32(dev, "gpio-mmio,base", &base); + if (!ret && base <= INT_MAX) + pdata->base = base; + return pdata; } -- 2.48.1