Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754625Ab3EVHMR (ORCPT ); Wed, 22 May 2013 03:12:17 -0400 Received: from devils.ext.ti.com ([198.47.26.153]:57526 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753175Ab3EVHMO (ORCPT ); Wed, 22 May 2013 03:12:14 -0400 From: Philip Avinash To: , , , , CC: , , , KV Sujith , Rob Herring , Rob Landley , , , Philip Avinash Subject: [PATCH 09/11] gpio: davinci: DT changes for driver Date: Wed, 22 May 2013 12:40:32 +0530 Message-ID: <1369206634-6778-10-git-send-email-avinashphilip@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1369206634-6778-1-git-send-email-avinashphilip@ti.com> References: <1369206634-6778-1-git-send-email-avinashphilip@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 Content-Length: 4581 Lines: 156 From: KV Sujith - Add of_device_id for Davinci GPIO driver. - Add function to populate data from DT. - Modify the probe to read from DT if DT match is found. - Add DT binding documentation for Davinci GPIO properties in a new file gpio-davinci.txt located at Documentation/devicetree/bindings/gpio/. Cc: Grant Likely Cc: Rob Herring Cc: Rob Landley Cc: devicetree-discuss@lists.ozlabs.org Cc: linux-doc@vger.kernel.org Signed-off-by: KV Sujith Signed-off-by: Philip Avinash --- .../devicetree/bindings/gpio/gpio-davinci.txt | 26 +++++++++ drivers/gpio/gpio-davinci.c | 57 ++++++++++++++++++-- 2 files changed, 80 insertions(+), 3 deletions(-) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-davinci.txt diff --git a/Documentation/devicetree/bindings/gpio/gpio-davinci.txt b/Documentation/devicetree/bindings/gpio/gpio-davinci.txt new file mode 100644 index 0000000..0d599d9 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-davinci.txt @@ -0,0 +1,26 @@ +Davinci GPIO controller bindings + +Required Properties: +- compatible:"ti,da830-gpio" + +- reg: Physical base address of the controller and length of memory mapped + region. + +- interrupts: The Starting IRQ number for GPIO + +- ngpio: The number of GPIO pins supported + +- intc_irq_num: The number of IRQs supported by the Interrupt Controller + +- gpio_unbanked: The number of GPIOs that have an individual interrupt + line to processor. + +Example: +gpio: gpio@1e26000 { + compatible = "ti,da830-gpio"; + reg = <0x226000 0x1000>; + interrupts = <42>; + ngpio = <144>; + intc_irq_num = <101>; + gpio_unbanked = <0>; +}; diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c index 08830aa..dbe3b83 100644 --- a/drivers/gpio/gpio-davinci.c +++ b/drivers/gpio/gpio-davinci.c @@ -19,6 +19,8 @@ #include #include #include +#include +#include #include #include #include @@ -133,6 +135,50 @@ static void davinci_gpio_set(struct gpio_chip *chip, unsigned offset, __raw_writel((1 << offset), value ? ®s->set_data : ®s->clr_data); } +static struct davinci_gpio_platform_data *davinci_gpio_set_pdata_of( + struct platform_device *pdev) +{ + struct device_node *dn = pdev->dev.of_node; + struct davinci_gpio_platform_data *pdata; + u32 val, ret; + + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (pdata) { + ret = of_property_read_u32(dn, "ngpio", &val); + if (ret) + goto of_err; + + pdata->ngpio = val; + + ret = of_property_read_u32(dn, "gpio_unbanked", &val); + if (ret) + goto of_err; + + pdata->gpio_unbanked = val; + + ret = of_property_read_u32(dn, "intc_irq_num", &val); + if (ret) + goto of_err; + + pdata->intc_irq_num = val; + } + + return pdata; + +of_err: + dev_err(&pdev->dev, "Populating pdata from DT failed: err %d\n", ret); + return NULL; +} + +static const struct of_device_id davinci_gpio_ids[] = { + { + .compatible = "ti,da830-gpio", + }, + { }, +}; + +MODULE_DEVICE_TABLE(of, davinci_gpio_ids); + static int davinci_gpio_probe(struct platform_device *pdev) { int i, base; @@ -142,13 +188,17 @@ static int davinci_gpio_probe(struct platform_device *pdev) struct davinci_gpio_regs *regs; struct device *dev = &pdev->dev; struct resource *res; + const struct of_device_id *match = + of_match_device(of_match_ptr(davinci_gpio_ids), &pdev->dev); - pdata = dev->platform_data; + pdata = match ? davinci_gpio_set_pdata_of(pdev) : dev->platform_data; if (!pdata) { dev_err(dev, "GPIO: No Platform Data Supplied\n"); return -EINVAL; } + dev->platform_data = pdata; + /* * The gpio banks conceptually expose a segmented bitmap, * and "ngpio" is one more than the largest zero-based @@ -490,8 +540,9 @@ done: static struct platform_driver davinci_gpio_driver = { .probe = davinci_gpio_probe, .driver = { - .name = "davinci_gpio", - .owner = THIS_MODULE, + .name = "davinci_gpio", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(davinci_gpio_ids), }, }; -- 1.7.9.5 -- 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/