#include <linux/delay.h>
#include <linux/device.h>
+#include <linux/gpio/consumer.h>
#include <linux/hid.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
struct i2chid_ops ops;
struct i2c_client *client;
+ struct gpio_desc *reset_gpio;
struct regulator_bulk_data supplies[2];
int post_power_delay_ms;
+ int post_reset_delay_ms;
};
static int i2c_hid_of_power_up(struct i2chid_ops *ops)
if (ihid_of->post_power_delay_ms)
msleep(ihid_of->post_power_delay_ms);
+ gpiod_set_value_cansleep(ihid_of->reset_gpio, 0);
+ if (ihid_of->post_reset_delay_ms)
+ msleep(ihid_of->post_reset_delay_ms);
+
return 0;
}
{
struct i2c_hid_of *ihid_of = container_of(ops, struct i2c_hid_of, ops);
+ gpiod_set_value_cansleep(ihid_of->reset_gpio, 1);
regulator_bulk_disable(ARRAY_SIZE(ihid_of->supplies),
ihid_of->supplies);
}
if (!device_property_read_u32(dev, "post-power-on-delay-ms", &val))
ihid_of->post_power_delay_ms = val;
+ /*
+ * Note this is a kernel internal device-property set by x86 platform code,
+ * this MUST not be used in devicetree files without first adding it to
+ * the DT bindings.
+ */
+ if (!device_property_read_u32(dev, "post-reset-deassert-delay-ms", &val))
+ ihid_of->post_reset_delay_ms = val;
+
+ /* Start out with reset asserted */
+ ihid_of->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(ihid_of->reset_gpio))
+ return PTR_ERR(ihid_of->reset_gpio);
+
ihid_of->supplies[0].supply = "vdd";
ihid_of->supplies[1].supply = "vddl";
ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ihid_of->supplies),