From 92d4fc1a1f56a12fa09c92d8c89873509a8012c9 Mon Sep 17 00:00:00 2001 From: Ezequiel Garcia Date: Sat, 15 Mar 2014 15:17:57 -0300 Subject: [PATCH] watchdog: orion: Introduce a SoC-specific RSTOUT mapping Separate the RSTOUT register mapping for the different compatible strings supported by the driver. This allows to use devm_ioremap on SoC variants that share the RSTOUT register, and devm_ioremap_resource (which requests the MMIO region) on SoCs that have a dedicated RSTOUT register. Signed-off-by: Ezequiel Garcia Reviewed-by: Guenter Roeck Acked-by: Jason Cooper Tested-by: Jason Gunthorpe Tested-by: Sebastian Hesselbarth Signed-off-by: Wim Van Sebroeck --- drivers/watchdog/orion_wdt.c | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-) diff --git a/drivers/watchdog/orion_wdt.c b/drivers/watchdog/orion_wdt.c index afa38314fb18..75f623f5e6c3 100644 --- a/drivers/watchdog/orion_wdt.c +++ b/drivers/watchdog/orion_wdt.c @@ -262,10 +262,6 @@ static void __iomem *orion_wdt_ioremap_rstout(struct platform_device *pdev, return devm_ioremap(&pdev->dev, res->start, resource_size(res)); - /* This workaround works only for "orion-wdt", DT-enabled */ - if (!of_device_is_compatible(pdev->dev.of_node, "marvell,orion-wdt")) - return NULL; - rstout = internal_regs + ORION_RSTOUT_MASK_OFFSET; WARN(1, FW_BUG "falling back to harcoded RSTOUT reg %pa\n", &rstout); @@ -316,6 +312,7 @@ MODULE_DEVICE_TABLE(of, orion_wdt_of_match_table); static int orion_wdt_get_regs(struct platform_device *pdev, struct orion_watchdog *dev) { + struct device_node *node = pdev->dev.of_node; struct resource *res; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -326,10 +323,26 @@ static int orion_wdt_get_regs(struct platform_device *pdev, if (!dev->reg) return -ENOMEM; - dev->rstout = orion_wdt_ioremap_rstout(pdev, res->start & - INTERNAL_REGS_MASK); - if (!dev->rstout) + /* Each supported compatible has some RSTOUT register quirk */ + if (of_device_is_compatible(node, "marvell,orion-wdt")) { + + dev->rstout = orion_wdt_ioremap_rstout(pdev, res->start & + INTERNAL_REGS_MASK); + if (!dev->rstout) + return -ENODEV; + + } else if (of_device_is_compatible(node, "marvell,armada-370-wdt") || + of_device_is_compatible(node, "marvell,armada-xp-wdt")) { + + /* Dedicated RSTOUT register, can be requested. */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + dev->rstout = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(dev->rstout)) + return PTR_ERR(dev->rstout); + + } else { return -ENODEV; + } return 0; } -- 2.20.1