Commit 92d4fc1a authored by Ezequiel Garcia's avatar Ezequiel Garcia Committed by Wim Van Sebroeck

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: default avatarEzequiel Garcia <ezequiel.garcia@free-electrons.com>
Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
Acked-by: default avatarJason Cooper <jason@lakedaemon.net>
Tested-by: default avatarJason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: default avatarSebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
parent aaaac9ec
...@@ -262,10 +262,6 @@ static void __iomem *orion_wdt_ioremap_rstout(struct platform_device *pdev, ...@@ -262,10 +262,6 @@ static void __iomem *orion_wdt_ioremap_rstout(struct platform_device *pdev,
return devm_ioremap(&pdev->dev, res->start, return devm_ioremap(&pdev->dev, res->start,
resource_size(res)); 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; rstout = internal_regs + ORION_RSTOUT_MASK_OFFSET;
WARN(1, FW_BUG "falling back to harcoded RSTOUT reg %pa\n", &rstout); 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); ...@@ -316,6 +312,7 @@ MODULE_DEVICE_TABLE(of, orion_wdt_of_match_table);
static int orion_wdt_get_regs(struct platform_device *pdev, static int orion_wdt_get_regs(struct platform_device *pdev,
struct orion_watchdog *dev) struct orion_watchdog *dev)
{ {
struct device_node *node = pdev->dev.of_node;
struct resource *res; struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
...@@ -326,10 +323,26 @@ static int orion_wdt_get_regs(struct platform_device *pdev, ...@@ -326,10 +323,26 @@ static int orion_wdt_get_regs(struct platform_device *pdev,
if (!dev->reg) if (!dev->reg)
return -ENOMEM; return -ENOMEM;
dev->rstout = orion_wdt_ioremap_rstout(pdev, res->start & /* Each supported compatible has some RSTOUT register quirk */
INTERNAL_REGS_MASK); if (of_device_is_compatible(node, "marvell,orion-wdt")) {
if (!dev->rstout)
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 -ENODEV;
}
return 0; return 0;
} }
......
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