From patchwork Tue Jan 10 13:03:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Binbin Zhou X-Patchwork-Id: 642332 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0697EC67871 for ; Tue, 10 Jan 2023 13:04:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238578AbjAJNEK (ORCPT ); Tue, 10 Jan 2023 08:04:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36950 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238569AbjAJNDx (ORCPT ); Tue, 10 Jan 2023 08:03:53 -0500 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 2C44553735; Tue, 10 Jan 2023 05:03:49 -0800 (PST) Received: from loongson.cn (unknown [112.20.112.33]) by gateway (Coremail) with SMTP id _____8Ax3eo1Yr1jWb4AAA--.2371S3; Tue, 10 Jan 2023 21:03:49 +0800 (CST) Received: from localhost.localdomain (unknown [112.20.112.33]) by localhost.localdomain (Coremail) with SMTP id AQAAf8Cxnb4wYr1j8W4XAA--.45936S3; Tue, 10 Jan 2023 21:03:48 +0800 (CST) From: Binbin Zhou To: Wolfram Sang , Wolfram Sang , Andy Shevchenko , Mika Westerberg , linux-i2c@vger.kernel.org Cc: loongarch@lists.linux.dev, devicetree@vger.kernel.org, Huacai Chen , WANG Xuerui , Andy Shevchenko , Arnd Bergmann , Rob Herring , Krzysztof Kozlowski , Jianmin Lv , Peibao Liu , Binbin Zhou Subject: [PATCH V10 1/4] i2c: gpio: Add support on ACPI-based system Date: Tue, 10 Jan 2023 21:03:53 +0800 Message-Id: <316ceae02402cffcc641b20890b7e232b531a1cd.1673340642.git.zhoubinbin@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 X-CM-TRANSID: AQAAf8Cxnb4wYr1j8W4XAA--.45936S3 X-CM-SenderInfo: p2kr3uplqex0o6or00hjvr0hdfq/ X-Coremail-Antispam: 1Uk129KBjvJXoWxZFW3Cw17Jw1rWw4DJr43Jrb_yoWrAr4DpF W5uFZxKFWjgF12gr17Xr1kZw1Skw1Iq3y7Kay7G34F9a1qqrn8XFy8KFyIgF9YyFW8Gw13 t3WDtFWfuFZrZw7anT9S1TB71UUUUjDqnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj qI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUIcSsGvfJTRUUU bSxYFVCjjxCrM7AC8VAFwI0_Jr0_Gr1l1xkIjI8I6I8E6xAIw20EY4v20xvaj40_Wr0E3s 1l1IIY67AEw4v_Jrv_JF1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xv wVC0I7IYx2IY67AKxVW8JVW5JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVW8JVWxJwA2z4 x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6xkF7I0E14v26r4UJVWxJr1l n4kS14v26r126r1DM2AIxVAIcxkEcVAq07x20xvEncxIr21l57IF6xkI12xvs2x26I8E6x ACxx1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1q6rW5McIj6I8E 87Iv67AKxVW8JVWxJwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lc7CjxV Aaw2AFwI0_Jw0_GFyl42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1l4IxY O2xFxVAFwI0_JF0_Jw1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGV WUWwC2zVAF1VAY17CE14v26r4a6rW5MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_ Gr0_Xr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rV WUJVWUCwCI42IY6I8E87Iv67AKxVW8JVWxJwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4U JbIYCTnIWIevJa73UjIFyTuYvjxU4YLvDUUUU Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Add support for the ACPI-based device registration, so that the driver can be also enabled through ACPI table. Signed-off-by: Binbin Zhou Reviewed-by: Andy Shevchenko Tested-by: Peibao Liu --- drivers/i2c/busses/i2c-gpio.c | 34 +++++++++++++++++++++------------- 1 file changed, 21 insertions(+), 13 deletions(-) diff --git a/drivers/i2c/busses/i2c-gpio.c b/drivers/i2c/busses/i2c-gpio.c index 0e4385a9bcf7..e4a59840c4fc 100644 --- a/drivers/i2c/busses/i2c-gpio.c +++ b/drivers/i2c/busses/i2c-gpio.c @@ -13,9 +13,9 @@ #include #include #include -#include #include #include +#include #include struct i2c_gpio_private_data { @@ -300,22 +300,23 @@ static inline void i2c_gpio_fault_injector_init(struct platform_device *pdev) {} static inline void i2c_gpio_fault_injector_exit(struct platform_device *pdev) {} #endif /* CONFIG_I2C_GPIO_FAULT_INJECTOR*/ -static void of_i2c_gpio_get_props(struct device_node *np, - struct i2c_gpio_platform_data *pdata) +/* Get i2c-gpio properties from DT or ACPI table */ +static void i2c_gpio_get_properties(struct device *dev, + struct i2c_gpio_platform_data *pdata) { u32 reg; - of_property_read_u32(np, "i2c-gpio,delay-us", &pdata->udelay); + device_property_read_u32(dev, "i2c-gpio,delay-us", &pdata->udelay); - if (!of_property_read_u32(np, "i2c-gpio,timeout-ms", ®)) + if (!device_property_read_u32(dev, "i2c-gpio,timeout-ms", ®)) pdata->timeout = msecs_to_jiffies(reg); pdata->sda_is_open_drain = - of_property_read_bool(np, "i2c-gpio,sda-open-drain"); + device_property_read_bool(dev, "i2c-gpio,sda-open-drain"); pdata->scl_is_open_drain = - of_property_read_bool(np, "i2c-gpio,scl-open-drain"); + device_property_read_bool(dev, "i2c-gpio,scl-open-drain"); pdata->scl_is_output_only = - of_property_read_bool(np, "i2c-gpio,scl-output-only"); + device_property_read_bool(dev, "i2c-gpio,scl-output-only"); } static struct gpio_desc *i2c_gpio_get_desc(struct device *dev, @@ -361,7 +362,7 @@ static int i2c_gpio_probe(struct platform_device *pdev) struct i2c_algo_bit_data *bit_data; struct i2c_adapter *adap; struct device *dev = &pdev->dev; - struct device_node *np = dev->of_node; + struct fwnode_handle *fwnode = dev_fwnode(dev); enum gpiod_flags gflags; int ret; @@ -373,8 +374,8 @@ static int i2c_gpio_probe(struct platform_device *pdev) bit_data = &priv->bit_data; pdata = &priv->pdata; - if (np) { - of_i2c_gpio_get_props(np, pdata); + if (fwnode) { + i2c_gpio_get_properties(dev, pdata); } else { /* * If all platform data settings are zero it is OK @@ -435,7 +436,7 @@ static int i2c_gpio_probe(struct platform_device *pdev) bit_data->data = priv; adap->owner = THIS_MODULE; - if (np) + if (fwnode) strscpy(adap->name, dev_name(dev), sizeof(adap->name)); else snprintf(adap->name, sizeof(adap->name), "i2c-gpio%d", pdev->id); @@ -443,7 +444,7 @@ static int i2c_gpio_probe(struct platform_device *pdev) adap->algo_data = bit_data; adap->class = I2C_CLASS_HWMON | I2C_CLASS_SPD; adap->dev.parent = dev; - adap->dev.of_node = np; + device_set_node(&adap->dev, fwnode); adap->nr = pdev->id; ret = i2c_bit_add_numbered_bus(adap); @@ -489,10 +490,17 @@ static const struct of_device_id i2c_gpio_dt_ids[] = { MODULE_DEVICE_TABLE(of, i2c_gpio_dt_ids); +static const struct acpi_device_id i2c_gpio_acpi_match[] = { + { "LOON0005" }, /* LoongArch */ + { } +}; +MODULE_DEVICE_TABLE(acpi, i2c_gpio_acpi_match); + static struct platform_driver i2c_gpio_driver = { .driver = { .name = "i2c-gpio", .of_match_table = i2c_gpio_dt_ids, + .acpi_match_table = i2c_gpio_acpi_match, }, .probe = i2c_gpio_probe, .remove = i2c_gpio_remove,