unicore32: nb0916: Use PWM lookup table

Use a PWM lookup table to provide the PWM to the pwm-backlight device.
The driver has a legacy code path that is required only because boards
still use the legacy method of requesting PWMs by global ID. Replacing
these usages allows that legacy fallback to be removed.

Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

diff --git a/arch/unicore32/kernel/puv3-nb0916.c b/arch/unicore32/kernel/puv3-nb0916.c
index 46ebfdccbc316d6e27f674d44d8e6c8d6de687e1..aab5f341dec0efce5a2426505c1feff97b87275d 100644 (file)
--- a/arch/unicore32/kernel/puv3-nb0916.c
+++ b/arch/unicore32/kernel/puv3-nb0916.c
@@ -19,6 +19,7 @@
 #include <linux/reboot.h>
 #include <linux/interrupt.h>
 #include <linux/i2c.h>
+#include <linux/pwm.h>
 #include <linux/pwm_backlight.h>
 #include <linux/gpio.h>
 #include <linux/gpio_keys.h>
@@ -49,11 +50,14 @@ static struct resource puv3_i2c_resources[] = {
        }
 };
 
+static struct pwm_lookup nb0916_pwm_lookup[] = {
+       PWM_LOOKUP("PKUnity-v3-PWM", 0, "pwm-backlight", NULL, 70 * 1024,
+                  PWM_POLARITY_NORMAL),
+};
+
 static struct platform_pwm_backlight_data nb0916_backlight_data = {
-       .pwm_id         = 0,
        .max_brightness = 100,
        .dft_brightness = 100,
-       .pwm_period_ns  = 70 * 1024,
        .enable_gpio    = -1,
 };
 
@@ -112,6 +116,8 @@ int __init mach_nb0916_init(void)
        platform_device_register_simple("PKUnity-v3-I2C", -1,
                        puv3_i2c_resources, ARRAY_SIZE(puv3_i2c_resources));
 
+       pwm_add_table(nb0916_pwm_lookup, ARRAY_SIZE(nb0916_pwm_lookup));
+
        platform_device_register_data(NULL, "pwm-backlight", -1,
                        &nb0916_backlight_data, sizeof(nb0916_backlight_data));