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>

diff --git a/drivers/input/keyboard/spear-keyboard.c b/drivers/input/keyboard/spear-keyboard.c
index e83cab2..6f287f7 100644 (file)
--- 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);