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Input: tc3589x-keypad - support probing from device tree 

Implement device tree probing for the tc3589x keypad driver.
This is modeled on the STMPE keypad driver and tested on the
Ux500 TVK1281618 UIB.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Linus Walleij 2014-04-20 12:34:34 -07:00 committed by Dmitry Torokhov
parent e5e0937c46
commit 7beebcb09f
1 changed files with 64 additions and 2 deletions
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66
drivers/input/keyboard/tc3589x-keypad.c
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@ -296,6 +296,65 @@ static void tc3589x_keypad_close(struct input_dev *input)
tc3589x_keypad_disable(keypad);
}
#ifdef CONFIG_OF
static const struct tc3589x_keypad_platform_data *
tc3589x_keypad_of_probe(struct device *dev)
{
struct device_node *np = dev->of_node;
struct tc3589x_keypad_platform_data *plat;
u32 cols, rows;
u32 debounce_ms;
int proplen;
if (!np)
return ERR_PTR(-ENODEV);
plat = devm_kzalloc(dev, sizeof(*plat), GFP_KERNEL);
if (!plat)
return ERR_PTR(-ENOMEM);
of_property_read_u32(np, "keypad,num-columns", &cols);
of_property_read_u32(np, "keypad,num-rows", &rows);
plat->kcol = (u8) cols;
plat->krow = (u8) rows;
if (!plat->krow || !plat->kcol ||
plat->krow > TC_KPD_ROWS || plat->kcol > TC_KPD_COLUMNS) {
dev_err(dev,
"keypad columns/rows not properly specified (%ux%u)\n",
plat->kcol, plat->krow);
return ERR_PTR(-EINVAL);
}
if (!of_get_property(np, "linux,keymap", &proplen)) {
dev_err(dev, "property linux,keymap not found\n");
return ERR_PTR(-ENOENT);
}
plat->no_autorepeat = of_property_read_bool(np, "linux,no-autorepeat");
plat->enable_wakeup = of_property_read_bool(np, "linux,wakeup");
/* The custom delay format is ms/16 */
of_property_read_u32(np, "debounce-delay-ms", &debounce_ms);
if (debounce_ms)
plat->debounce_period = debounce_ms * 16;
else
plat->debounce_period = TC_KPD_DEBOUNCE_PERIOD;
plat->settle_time = TC_KPD_SETTLE_TIME;
/* FIXME: should be property of the IRQ resource? */
plat->irqtype = IRQF_TRIGGER_FALLING;
return plat;
}
#else
static inline const struct tc3589x_keypad_platform_data *
tc3589x_keypad_of_probe(struct device *dev)
{
return ERR_PTR(-ENODEV);
}
#endif
static int tc3589x_keypad_probe(struct platform_device *pdev)
{
struct tc3589x *tc3589x = dev_get_drvdata(pdev->dev.parent);
@ -306,8 +365,11 @@ static int tc3589x_keypad_probe(struct platform_device *pdev)
plat = tc3589x->pdata->keypad;
if (!plat) {
dev_err(&pdev->dev, "invalid keypad platform data\n");
return -EINVAL;
plat = tc3589x_keypad_of_probe(&pdev->dev);
if (IS_ERR(plat)) {
dev_err(&pdev->dev, "invalid keypad platform data\n");
return PTR_ERR(plat);
}
}
irq = platform_get_irq(pdev, 0);