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[35.220.130.94]) by smtp.gmail.com with ESMTPSA id x7-20020a17090a294700b00234899c65e7sm4763228pjf.28.2023.02.22.03.12.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Feb 2023 03:12:36 -0800 (PST) From: Keguang Zhang To: linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Linus Walleij , Bartosz Golaszewski , Rob Herring , Krzysztof Kozlowski , Keguang Zhang Subject: [PATCH 3/4] gpio: loongson1: Add DT support Date: Wed, 22 Feb 2023 19:12:12 +0800 Message-Id: <20230222111213.2241633-4-keguang.zhang@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230222111213.2241633-1-keguang.zhang@gmail.com> References: <20230222111213.2241633-1-keguang.zhang@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org This patch adds DT support for Loongson-1 GPIO driver, including the following changes. - Add the of_match_table - Parse the ngpios property - Parse the alias id Signed-off-by: Keguang Zhang --- drivers/gpio/gpio-loongson1.c | 31 ++++++++++++++++++++++++++++--- 1 file changed, 28 insertions(+), 3 deletions(-) diff --git a/drivers/gpio/gpio-loongson1.c b/drivers/gpio/gpio-loongson1.c index b950bcfd78ce..92ad31f61bf0 100644 --- a/drivers/gpio/gpio-loongson1.c +++ b/drivers/gpio/gpio-loongson1.c @@ -48,7 +48,10 @@ static void ls1x_gpio_free(struct gpio_chip *gc, unsigned int offset) static int ls1x_gpio_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + struct device_node *dn = pdev->dev.of_node; struct ls1x_gpio_chip *ls1x_gc; + unsigned int ngpios; + int id; int ret; ls1x_gc = devm_kzalloc(dev, sizeof(*ls1x_gc), GFP_KERNEL); @@ -59,34 +62,56 @@ static int ls1x_gpio_probe(struct platform_device *pdev) if (IS_ERR(ls1x_gc->reg_base)) return PTR_ERR(ls1x_gc->reg_base); + if (of_property_read_u32(dn, "ngpios", &ngpios)) { + dev_err(dev, "Missing ngpios OF property\n"); + return -ENODEV; + } + + id = of_alias_get_id(dn, "gpio"); + if (id < 0) { + dev_err(dev, "Couldn't get OF id\n"); + return id; + } + ret = bgpio_init(&ls1x_gc->gc, dev, 4, ls1x_gc->reg_base + GPIO_DATA, ls1x_gc->reg_base + GPIO_OUTPUT, NULL, NULL, ls1x_gc->reg_base + GPIO_DIR, 0); if (ret) goto err; + ls1x_gc->gc.label = dev_name(&pdev->dev); + ls1x_gc->gc.ngpio = ngpios; ls1x_gc->gc.owner = THIS_MODULE; + ls1x_gc->gc.parent = dev; + ls1x_gc->gc.base = pdev->id * BITS_PER_LONG; ls1x_gc->gc.request = ls1x_gpio_request; ls1x_gc->gc.free = ls1x_gpio_free; - ls1x_gc->gc.base = pdev->id * 32; ret = devm_gpiochip_add_data(dev, &ls1x_gc->gc, ls1x_gc); if (ret) goto err; platform_set_drvdata(pdev, ls1x_gc); - dev_info(dev, "Loongson1 GPIO driver registered\n"); + + dev_info(dev, "GPIO controller %d registered with %d pins\n", id, + ngpios); return 0; err: - dev_err(dev, "failed to register GPIO device\n"); + dev_err(dev, "failed to register GPIO controller\n"); return ret; } +static const struct of_device_id ls1x_gpio_dt_ids[] = { + { .compatible = "loongson,ls1x-gpio", }, + { /* sentinel */ } +}; + static struct platform_driver ls1x_gpio_driver = { .probe = ls1x_gpio_probe, .driver = { .name = "ls1x-gpio", + .of_match_table = ls1x_gpio_dt_ids, }, };