@@ -10,6 +10,7 @@
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/i2c.h>
+#include <linux/gpio/driver.h>
#include <linux/spi/spi.h>
#include <asm/unaligned.h>
@@ -26,12 +27,16 @@
#define SPI_XCOMM_CMD_UPDATE_CONFIG 0x03
#define SPI_XCOMM_CMD_WRITE 0x04
+#define SPI_XCOMM_CMD_GPIO_SET 0x05
#define SPI_XCOMM_CLOCK 48000000
struct spi_xcomm {
struct i2c_client *i2c;
+ struct gpio_chip gc;
+ int gpio_val;
+
uint16_t settings;
uint16_t chipselect;
@@ -40,6 +45,54 @@ struct spi_xcomm {
uint8_t buf[63];
};
+static void spi_xcomm_gpio_set_value(struct gpio_chip *chip,
+ unsigned int offset, int val)
+{
+ struct spi_xcomm *spi_xcomm = gpiochip_get_data(chip);
+ unsigned char buf[2];
+ int ret;
+
+ buf[0] = SPI_XCOMM_CMD_GPIO_SET;
+ buf[1] = !!val;
+ ret = i2c_master_send(spi_xcomm->i2c, buf, 2);
+ if (ret < 0)
+ return;
+
+ spi_xcomm->gpio_val = !!val;
+}
+
+static int spi_xcomm_gpio_get_value(struct gpio_chip *chip, unsigned int offset)
+{
+ struct spi_xcomm *spi_xcomm = gpiochip_get_data(chip);
+
+ return spi_xcomm->gpio_val;
+}
+
+static int spi_xcomm_gpio_get_direction(struct gpio_chip *chip,
+ unsigned int offset)
+{
+ return GPIO_LINE_DIRECTION_OUT;
+}
+
+static int spi_xcomm_gpio_add(struct spi_xcomm *spi_xcomm)
+{
+ struct device *dev = &spi_xcomm->i2c->dev;
+
+ if (!IS_ENABLED(CONFIG_GPIOLIB))
+ return 0;
+
+ spi_xcomm->gc.get_direction = spi_xcomm_gpio_get_direction;
+ spi_xcomm->gc.get = spi_xcomm_gpio_get_value;
+ spi_xcomm->gc.set = spi_xcomm_gpio_set_value;
+ spi_xcomm->gc.can_sleep = 1;
+ spi_xcomm->gc.base = -1;
+ spi_xcomm->gc.ngpio = 1;
+ spi_xcomm->gc.label = spi_xcomm->i2c->name;
+ spi_xcomm->gc.owner = THIS_MODULE;
+
+ return devm_gpiochip_add_data(dev, &spi_xcomm->gc, spi_xcomm);
+}
+
static int spi_xcomm_sync_config(struct spi_xcomm *spi_xcomm, unsigned int len)
{
uint16_t settings;
@@ -227,7 +280,7 @@ static int spi_xcomm_probe(struct i2c_client *i2c)
if (ret < 0)
spi_controller_put(host);
- return ret;
+ return spi_xcomm_gpio_add(spi_xcomm);
}
static const struct i2c_device_id spi_xcomm_ids[] = {