[PATCH v1 39/63] Input: touchscreen: Atmel: Add device tree support for T15 key array objects

Jiada Wang
2019-08-16T08:38:53Z

From: Daniel Gong <Zhanli.Gong@cn.bosch.com>

Signed-off-by: Daniel Gong <Zhanli.Gong@cn.bosch.com>
Signed-off-by: George G. Davis <george_davis@mentor.com>
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
---
drivers/input/touchscreen/atmel_mxt_ts.c | 29 ++++++++++++++++++++++++
1 file changed, 29 insertions(+)

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index be63002c2b31..3b9544c0a209 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -4143,10 +4143,12 @@ static int mxt_parse_device_properties(struct mxt_data *data)
{
static const char keymap_property[] = "linux,gpio-keymap";
static const char gpios_property[] = "atmel,gpios";
+ static const char buttons_property[] = "atmel,key-buttons";
struct device *dev = &data->client->dev;
struct device_node *np = dev ? dev->of_node : NULL;
struct device_node *np_gpio;
u32 *keymap;
+ u32 *buttonmap;
int n_keys;
int error;

@@ -4181,6 +4183,33 @@ static int mxt_parse_device_properties(struct mxt_data *data)
data->t19_num_keys = n_keys;
}

+ if (device_property_present(dev, buttons_property)) {
+ n_keys = device_property_read_u32_array(dev, buttons_property,
+ NULL, 0);
+ if (n_keys <= 0) {
+ error = n_keys < 0 ? n_keys : -EINVAL;
+ dev_err(dev, "invalid/malformed '%s' property: %d\n",
+ buttons_property, error);
+ return error;
+ }
+
+ buttonmap = devm_kmalloc_array(dev, n_keys, sizeof(*buttonmap),
+ GFP_KERNEL);
+ if (!buttonmap)
+ return -ENOMEM;
+
+ error = device_property_read_u32_array(dev, buttons_property,
+ buttonmap, n_keys);
+ if (error) {
+ dev_err(dev, "failed to parse '%s' property: %d\n",
+ buttons_property, error);
+ return error;
+ }
+
+ data->t15_keymap = buttonmap;
+ data->t15_num_keys = n_keys;
+ }
+
device_property_read_u32(dev, "atmel,suspend-mode", &data->suspend_mode);

np_gpio = of_get_child_by_name(np, gpios_property);
--
2.19.2