1 files changed, 32 insertions, 1 deletions

diff --git a/drivers/gpio/gpio-syscon.c b/drivers/gpio/gpio-syscon.c
index 8b0a69c5ba88..87c18a544513 100644
--- a/drivers/gpio/gpio-syscon.c
+++ b/drivers/gpio/gpio-syscon.c
@@ -10,7 +10,7 @@
  */
 
 #include <linux/err.h>
-#include <linux/gpio.h>
+#include <linux/gpio/driver.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
@@ -135,6 +135,33 @@ static const struct syscon_gpio_data clps711x_mctrl_gpio = {
         .dat_bit_offset = 0x40 * 8 + 8,
 };
 
+static void rockchip_gpio_set(struct gpio_chip *chip, unsigned int offset,
+                              int val)
+{
+        struct syscon_gpio_priv *priv = gpiochip_get_data(chip);
+        unsigned int offs;
+        u8 bit;
+        u32 data;
+        int ret;
+
+        offs = priv->dreg_offset + priv->data->dat_bit_offset + offset;
+        bit = offs % SYSCON_REG_BITS;
+        data = (val ? BIT(bit) : 0) | BIT(bit + 16);
+        ret = regmap_write(priv->syscon,
+                           (offs / SYSCON_REG_BITS) * SYSCON_REG_SIZE,
+                           data);
+        if (ret < 0)
+                dev_err(chip->parent, "gpio write failed ret(%d)\n", ret);
+}
+
+static const struct syscon_gpio_data rockchip_rk3328_gpio_mute = {
+        /* RK3328 GPIO_MUTE is an output only pin at GRF_SOC_CON10[1] */
+        .flags          = GPIO_SYSCON_FEAT_OUT,
+        .bit_count      = 1,
+        .dat_bit_offset = 0x0428 * 8 + 1,
+        .set            = rockchip_gpio_set,
+};
+
 #define KEYSTONE_LOCK_BIT BIT(0)
 
 static void keystone_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
@@ -175,6 +202,10 @@ static const struct of_device_id syscon_gpio_ids[] = {
                 .compatible     = "ti,keystone-dsp-gpio",
                 .data           = &keystone_dsp_gpio,
         },
+        {
+                .compatible     = "rockchip,rk3328-grf-gpio",
+                .data           = &rockchip_rk3328_gpio_mute,
+        },
         { }
 };
 MODULE_DEVICE_TABLE(of, syscon_gpio_ids);