Input: spear-keyboard - add device tree bindings

This adds simple DT bindings for spear-keyboard controller.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 56 insertions, 15 deletions

diff --git a/drivers/input/keyboard/spear-keyboard.c b/drivers/input/keyboard/spear-keyboard.c
index e83cab27eb56..6f287f7e1538 100644
--- a/drivers/input/keyboard/spear-keyboard.c
+++ b/drivers/input/keyboard/spear-keyboard.c
@@ -19,6 +19,7 @@
 #include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm_wakeup.h>
 #include <linux/slab.h>
@@ -63,6 +64,7 @@ struct spear_kbd {
         unsigned int mode;
         unsigned short last_key;
         unsigned short keycodes[NUM_ROWS * NUM_COLS];
+        bool rep;
 };
 
 static irqreturn_t spear_kbd_interrupt(int irq, void *dev_id)
@@ -138,27 +140,49 @@ static void spear_kbd_close(struct input_dev *dev)
         kbd->last_key = KEY_RESERVED;
 }
 
-static int __devinit spear_kbd_probe(struct platform_device *pdev)
+#ifdef CONFIG_OF
+static int __devinit spear_kbd_parse_dt(struct platform_device *pdev,
+                                        struct spear_kbd *kbd)
 {
-        const struct kbd_platform_data *pdata = pdev->dev.platform_data;
-        const struct matrix_keymap_data *keymap;
-        struct spear_kbd *kbd;
-        struct input_dev *input_dev;
-        struct resource *res;
-        int irq;
+        struct device_node *np = pdev->dev.of_node;
         int error;
+        u32 val;
 
-        if (!pdata) {
-                dev_err(&pdev->dev, "Invalid platform data\n");
+        if (!np) {
+                dev_err(&pdev->dev, "Missing DT data\n");
                 return -EINVAL;
         }
 
-        keymap = pdata->keymap;
-        if (!keymap) {
-                dev_err(&pdev->dev, "no keymap defined\n");
-                return -EINVAL;
+        if (of_property_read_bool(np, "autorepeat"))
+                kbd->rep = true;
+
+        error = of_property_read_u32(np, "st,mode", &val);
+        if (error) {
+                dev_err(&pdev->dev, "DT: Invalid or missing mode\n");
+                return error;
         }
 
+        kbd->mode = val;
+        return 0;
+}
+#else
+static inline int spear_kbd_parse_dt(struct platform_device *pdev,
+                                     struct spear_kbd *kbd)
+{
+        return -ENOSYS;
+}
+#endif
+
+static int __devinit spear_kbd_probe(struct platform_device *pdev)
+{
+        struct kbd_platform_data *pdata = dev_get_platdata(&pdev->dev);
+        const struct matrix_keymap_data *keymap = pdata ? pdata->keymap : NULL;
+        struct spear_kbd *kbd;
+        struct input_dev *input_dev;
+        struct resource *res;
+        int irq;
+        int error;
+
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (!res) {
                 dev_err(&pdev->dev, "no keyboard resource defined\n");
@@ -181,7 +205,15 @@ static int __devinit spear_kbd_probe(struct platform_device *pdev)
 
         kbd->input = input_dev;
         kbd->irq = irq;
-        kbd->mode = pdata->mode;
+
+        if (!pdata) {
+                error = spear_kbd_parse_dt(pdev, kbd);
+                if (error)
+                        goto err_free_mem;
+        } else {
+                kbd->mode = pdata->mode;
+                kbd->rep = pdata->rep;
+        }
 
         kbd->res = request_mem_region(res->start, resource_size(res),
                                       pdev->name);
@@ -221,7 +253,7 @@ static int __devinit spear_kbd_probe(struct platform_device *pdev)
                 goto err_put_clk;
         }
 
-        if (pdata->rep)
+        if (kbd->rep)
                 __set_bit(EV_REP, input_dev->evbit);
         input_set_capability(input_dev, EV_MSC, MSC_SCAN);
 
@@ -318,6 +350,14 @@ static int spear_kbd_resume(struct device *dev)
 
 static SIMPLE_DEV_PM_OPS(spear_kbd_pm_ops, spear_kbd_suspend, spear_kbd_resume);
 
+#ifdef CONFIG_OF
+static const struct of_device_id spear_kbd_id_table[] = {
+        { .compatible = "st,spear300-kbd" },
+        {}
+};
+MODULE_DEVICE_TABLE(of, spear_kbd_id_table);
+#endif
+
 static struct platform_driver spear_kbd_driver = {
         .probe          = spear_kbd_probe,
         .remove         = __devexit_p(spear_kbd_remove),
@@ -325,6 +365,7 @@ static struct platform_driver spear_kbd_driver = {
                 .name   = "keyboard",
                 .owner  = THIS_MODULE,
                 .pm     = &spear_kbd_pm_ops,
+                .of_match_table = of_match_ptr(spear_kbd_id_table),
         },
 };
 module_platform_driver(spear_kbd_driver);