Remove redundant comments and provide a detailed explanation of the
GPIO version ID.

Signed-off-by: Ye Zhang <ye.zhang@rock-chips.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
---
 drivers/gpio/gpio-rockchip.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-rockchip.c b/drivers/gpio/gpio-rockchip.c
index 365ab947983c..702e711f9c23 100644
--- a/drivers/gpio/gpio-rockchip.c
+++ b/drivers/gpio/gpio-rockchip.c
@@ -26,9 +26,15 @@
 #include "../pinctrl/core.h"
 #include "../pinctrl/pinctrl-rockchip.h"
 
+/*
+ * Version ID Register
+ * Bits [31:24] - Major Version
+ * Bits [23:16] - Minor Version
+ * Bits [15:0]  - Revision Number
+ */
 #define GPIO_TYPE_V1		(0)           /* GPIO Version ID reserved */
-#define GPIO_TYPE_V2		(0x01000C2B)  /* GPIO Version ID 0x01000C2B */
-#define GPIO_TYPE_V2_1		(0x0101157C)  /* GPIO Version ID 0x0101157C */
+#define GPIO_TYPE_V2		(0x01000C2B)
+#define GPIO_TYPE_V2_1		(0x0101157C)
 
 static const struct rockchip_gpio_regs gpio_regs_v1 = {
 	.port_dr = 0x00,
-- 
2.34.1