Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755208AbaFQEBL (ORCPT ); Tue, 17 Jun 2014 00:01:11 -0400 Received: from arroyo.ext.ti.com ([192.94.94.40]:51084 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755098AbaFQEBI (ORCPT ); Tue, 17 Jun 2014 00:01:08 -0400 From: George Cherian To: , , , , , , , , , CC: , , , Subject: [PATCH 2/2] extcon: gpio: Add dt support for the driver. Date: Tue, 17 Jun 2014 09:28:20 +0530 Message-ID: <1402977500-19987-3-git-send-email-george.cherian@ti.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1402977500-19987-1-git-send-email-george.cherian@ti.com> References: <1402977500-19987-1-git-send-email-george.cherian@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add device tree support to extcon-gpio driver. Add devicetree binding documentation Signed-off-by: George Cherian --- .../devicetree/bindings/extcon/extcon-gpio.txt | 34 ++++++++++++++++++++++ drivers/extcon/extcon-gpio.c | 29 ++++++++++++++++++ 2 files changed, 63 insertions(+) create mode 100644 Documentation/devicetree/bindings/extcon/extcon-gpio.txt diff --git a/Documentation/devicetree/bindings/extcon/extcon-gpio.txt b/Documentation/devicetree/bindings/extcon/extcon-gpio.txt new file mode 100644 index 0000000..80b791b --- /dev/null +++ b/Documentation/devicetree/bindings/extcon/extcon-gpio.txt @@ -0,0 +1,34 @@ +GPIO based EXTCON + +EXTCON GPIO +----------- + +Required Properties: + - compatible: should be: + * "ti,extcon-gpio" + - gpios: specifies the gpio pin used. + - debounce: Debounce time for GPIO IRQ in ms + - irq-flags: IRQ flag to be used ( eg: IRQ_TYPE_EDGE_FALLING) + +Optional Properties: + - gpio-active-low: Property describing whether gpio active state is 1 or 0 + If defined , low state of gpio means active. + - check-on-resume: Property describing whether to check the gpio state + while resuming from SLEEP. + - state-on: print_state is overriden with state_on string if provided. + If NULL, default method of extcon class is used. + - state_off: print_state is overriden with state_off string if provided. + If NUll, default method of extcon class is used. + +Eg: + + extcon1: am43_usbid_extcon1 { + compatible = "ti,extcon-gpio"; + gpios = <&gpio3 12 GPIO_ACTIVE_HIGH>; + gpio-active-low; + debounce = <20>; + irq-flags = ; + state-on = "USB ID FLOAT"; + state-off = "USB ID GND"; + + }; diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c index 6c268b4..14d999d 100644 --- a/drivers/extcon/extcon-gpio.c +++ b/drivers/extcon/extcon-gpio.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include #include @@ -83,12 +84,34 @@ static ssize_t extcon_gpio_print_state(struct extcon_dev *edev, char *buf) static int gpio_extcon_probe(struct platform_device *pdev) { + struct device_node *np = pdev->dev.of_node; struct gpio_extcon_platform_data *pdata = dev_get_platdata(&pdev->dev); struct gpio_extcon_data *extcon_data; int ret; + if (np) { + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + pdata->gpio = of_get_gpio(np, 0); + if (!gpio_is_valid(pdata->gpio)) + return -EPROBE_DEFER; + + pdata->name = np->name; + pdata->gpio_active_low = of_property_read_bool(np, + "gpio-active-low"); + pdata->check_on_resume = of_property_read_bool(np, + "check-on-resume"); + of_property_read_u32(np, "debounce", (u32 *)&pdata->debounce); + of_property_read_u32(np, "irq-flags", (u32 *)&pdata->irq_flags); + of_property_read_string(np, "state-on", &pdata->state_on); + of_property_read_string(np, "state-off", &pdata->state_off); + } + if (!pdata) return -EBUSY; + if (!pdata->irq_flags) { dev_err(&pdev->dev, "IRQ flag is not specified.\n"); return -EINVAL; @@ -177,6 +200,11 @@ static int gpio_extcon_resume(struct device *dev) static SIMPLE_DEV_PM_OPS(gpio_extcon_pm_ops, NULL, gpio_extcon_resume); +static struct of_device_id of_extcon_gpio_match_tbl[] = { + { .compatible = "ti,extcon-gpio", }, + { /* end */ } +}; + static struct platform_driver gpio_extcon_driver = { .probe = gpio_extcon_probe, .remove = gpio_extcon_remove, @@ -184,6 +212,7 @@ static struct platform_driver gpio_extcon_driver = { .name = "extcon-gpio", .owner = THIS_MODULE, .pm = &gpio_extcon_pm_ops, + .of_match_table = of_extcon_gpio_match_tbl, }, }; -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/