pwm: rockchip: fix compilation error on arm

Signed-off-by: Huang, Tao <huangtao@rock-chips.com>

diff --git a/drivers/pwm/pwm-rockchip.c b/drivers/pwm/pwm-rockchip.c
index 33b28e9394938c9ff8df16e5f784ee32082ba40d..640e7c4c8dfd1e22ca17eba6c03748273681c046 100755 (executable)
--- a/drivers/pwm/pwm-rockchip.c
+++ b/drivers/pwm/pwm-rockchip.c
@@ -114,8 +114,16 @@ module_param_named(dbg_level, pwm_dbg_level, int, 0644);
 
 };
 
+#ifdef CONFIG_ARM64
 extern int rk3368_lcdc_update_pwm(int bl_pwm_period, int bl_pwm_duty);
 extern int rk3368_lcdc_cabc_status(void);
+#else
+static inline int rk3368_lcdc_update_pwm(int bl_pwm_period, int bl_pwm_duty)
+{
+       return 0;
+}
+static inline int rk3368_lcdc_cabc_status(void) { return 0; }
+#endif
 
 static inline void rk_pwm_writel(struct rk_pwm_chip *chip,
                                    unsigned int num, unsigned long offset,