[PATCH v4 4/4] ARM: pinctrl: sunxi-pinctrl: fix pin funtion can not be match correctly.

[hao_zhang]

Pin function can not be match correctly when SUNXI_PIN describe with
mutiple variant and same function.

such as:
on pinctrl-sun4i-a10.c

SUNXI_PIN(SUNXI_PINCTRL_PIN(B, 2),
                SUNXI_FUNCTION(0x0, "gpio_in"),
                SUNXI_FUNCTION(0x1, "gpio_out"),
                SUNXI_FUNCTION_VARIANT(0x2, "pwm",    /* PWM0 */
                        PINCTRL_SUN4I_A10 |
                        PINCTRL_SUN7I_A20),
                SUNXI_FUNCTION_VARIANT(0x3, "pwm",    /* PWM0 */
                        PINCTRL_SUN8I_R40)),

it would always match to the first variant function
(PINCTRL_SUN4I_A10, PINCTRL_SUN7I_A20)

so we should add variant compare on it.

Signed-off-by: hao_zhang <hao5781...@gmail.com>
---
 drivers/pinctrl/sunxi/pinctrl-sunxi.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c 
b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
index 4b6cb25..f23e74e 100644
--- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c
+++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
@@ -83,9 +83,11 @@ sunxi_pinctrl_desc_find_function_by_name(struct 
sunxi_pinctrl *pctl,
                        struct sunxi_desc_function *func = pin->functions;
 
                        while (func->name) {
-                               if (!strcmp(func->name, func_name))
+                               if (!strcmp(func->name, func_name)) {
+                                       if (!(func->variant) ||
+                                          (func->variant & pctl->variant))
                                        return func;
-
+                               }
                                func++;
                        }
                }
-- 
2.7.4