Revert "gpio: lp3943: Drop pin_used and lp3943_gpio_request/lp3943_gpio_free"

This reverts commit 3fab91ea284a3b795327dda915a3c150a49e4be2.

1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/mfd/lp3943.h b/include/linux/mfd/lp3943.h
index d3a738118b27..3490db782988 100644
--- a/include/linux/mfd/lp3943.h
+++ b/include/linux/mfd/lp3943.h
@@ -94,12 +94,18 @@ struct lp3943_reg_cfg {
  * @regmap: Used for I2C communication on accessing registers
  * @pdata: LP3943 platform specific data
  * @mux_cfg: Register configuration for pin MUX
+ * @pin_used: Bit mask for output pin used.
+ *	      This bitmask is used for pin assignment management.
+ *	      1 = pin used, 0 = available.
+ *	      Only LSB 16 bits are used, but it is unsigned long type
+ *	      for atomic bitwise operations.
  */
 struct lp3943 {
 	struct device *dev;
 	struct regmap *regmap;
 	struct lp3943_platform_data *pdata;
 	const struct lp3943_reg_cfg *mux_cfg;
+	unsigned long pin_used;
 };
 
 int lp3943_read_byte(struct lp3943 *lp3943, u8 reg, u8 *read);