ARM: OMAP2+: gpmc: add DT bindings for OneNAND

This patch adds device tree bindings for OMAP OneNAND devices.
Tested on an OMAP3 3430 IGEPv2 board.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index 0cf239231d36..1adb2d4496f6 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -39,6 +39,7 @@
 #include "omap_device.h"
 #include "gpmc.h"
 #include "gpmc-nand.h"
+#include "gpmc-onenand.h"
 
 #define DEVICE_NAME             "omap-gpmc"
 
@@ -1263,6 +1264,43 @@ static int gpmc_probe_nand_child(struct platform_device *pdev,
 }
 #endif
 
+#ifdef CONFIG_MTD_ONENAND
+static int gpmc_probe_onenand_child(struct platform_device *pdev,
+                                 struct device_node *child)
+{
+        u32 val;
+        struct omap_onenand_platform_data *gpmc_onenand_data;
+
+        if (of_property_read_u32(child, "reg", &val) < 0) {
+                dev_err(&pdev->dev, "%s has no 'reg' property\n",
+                        child->full_name);
+                return -ENODEV;
+        }
+
+        gpmc_onenand_data = devm_kzalloc(&pdev->dev, sizeof(*gpmc_onenand_data),
+                                         GFP_KERNEL);
+        if (!gpmc_onenand_data)
+                return -ENOMEM;
+
+        gpmc_onenand_data->cs = val;
+        gpmc_onenand_data->of_node = child;
+        gpmc_onenand_data->dma_channel = -1;
+
+        if (!of_property_read_u32(child, "dma-channel", &val))
+                gpmc_onenand_data->dma_channel = val;
+
+        gpmc_onenand_init(gpmc_onenand_data);
+
+        return 0;
+}
+#else
+static int gpmc_probe_onenand_child(struct platform_device *pdev,
+                                    struct device_node *child)
+{
+        return 0;
+}
+#endif
+
 static int gpmc_probe_dt(struct platform_device *pdev)
 {
         int ret;
@@ -1281,6 +1319,13 @@ static int gpmc_probe_dt(struct platform_device *pdev)
                 }
         }
 
+        for_each_node_by_name(child, "onenand") {
+                ret = gpmc_probe_onenand_child(pdev, child);
+                if (ret < 0) {
+                        of_node_put(child);
+                        return ret;
+                }
+        }
         return 0;
 }
 #else