On 27 March 2016 at 16:22, Geert Uytterhoeven [off-list ref] wrote:

On Thu, Mar 24, 2016 at 1:35 PM, Baolin Wang [off-list ref] wrote:

quoted

--- a/drivers/power/wm831x_power.c
+++ b/drivers/power/wm831x_power.c

@@ -13,6 +13,7 @@
 #include <linux/platform_device.h>
 #include <linux/power_supply.h>
 #include <linux/slab.h>
+#include <linux/usb/usb_charger.h>

 #include <linux/mfd/wm831x/core.h>
 #include <linux/mfd/wm831x/auxadc.h>

@@ -31,6 +32,8 @@ struct wm831x_power {
        char usb_name[20];
        char battery_name[20];
        bool have_battery;
+       struct usb_charger *usb_charger;
+       struct notifier_block usb_notify;
 };

 static int wm831x_power_check_online(struct wm831x *wm831x, int supply,

@@ -125,6 +128,43 @@ static enum power_supply_property wm831x_usb_props[] = {
        POWER_SUPPLY_PROP_VOLTAGE_NOW,
 };

+/* In milliamps */
+static unsigned int wm831x_usb_limits[] = {

const

OK.

quoted

+       0,
+       2,
+       100,
+       500,
+       900,
+       1500,
+       1800,
+       550,
+};
+
+static int wm831x_usb_limit_change(struct notifier_block *nb,
+                                  unsigned long limit, void *data)
+{
+       struct wm831x_power *wm831x_power = container_of(nb,
+                                                        struct wm831x_power,
+                                                        usb_notify);
+       int i, best;

unsigned int

OK.

quoted

+
+       /* Find the highest supported limit */
+       best = 0;
+       for (i = 0; i < ARRAY_SIZE(wm831x_usb_limits); i++) {
+               if (limit >= wm831x_usb_limits[i] &&
+                   wm831x_usb_limits[best] < wm831x_usb_limits[i])
+                       best = i;
+       }
+
+       dev_dbg(wm831x_power->wm831x->dev,
+               "Limiting USB current to %dmA", wm831x_usb_limits[best]);

%u

OK. Thanks for your comments.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

-- 
Baolin.wang
Best Regards