On Tue 2015-02-24 15:33:53, NeilBrown wrote:
> This allows AC charging to be turned off, much like usb charging.
>
> "continuous" (aka "linear") mode maps to the CVENAC (constant voltage)
> feature of the twl4030.
>
> Signed-off-by: NeilBrown <neilb@xxxxxxx>
Acked-by: Pavel Machek <pavel@xxxxxx>
> --- a/drivers/power/twl4030_charger.c
> +++ b/drivers/power/twl4030_charger.c
> @@ -112,7 +112,7 @@ struct twl4030_bci {
> int ichg_eoc, ichg_lo, ichg_hi;
> int usb_cur, ac_cur;
> bool ac_is_active;
> - int usb_mode; /* charging mode requested */
> + int usb_mode, ac_mode; /* charging mode requested */
> #define CHARGE_OFF 0
> #define CHARGE_AUTO 1
> #define CHARGE_LINEAR 2
> @@ -449,12 +449,18 @@ static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
> /*
> * Enable/Disable AC Charge funtionality.
> */
> -static int twl4030_charger_enable_ac(bool enable)
> +static int twl4030_charger_enable_ac(struct twl4030_bci *bci, bool enable)
> {
> int ret;
>
> - if (enable)
> - ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOAC);
> + if (bci->ac_mode == CHARGE_OFF)
> + enable = false;
> +
> + if (enable && bci->ac_mode == CHARGE_LINEAR)
> + ret = twl4030_clear_set_boot_bci(0, (TWL4030_CVENAC |
> + TWL4030_BCIAUTOAC));
> + else if (enable)
> + ret = twl4030_clear_set_boot_bci(TWL4030_CVENAC, TWL4030_BCIAUTOAC);
> else
> ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC, 0);
>
> @@ -688,9 +694,15 @@ twl4030_bci_mode_store(struct device *dev, struct device_attribute *attr,
> mode = 2;
> else
> return -EINVAL;
> - twl4030_charger_enable_usb(bci, false);
> - bci->usb_mode = mode;
> - status = twl4030_charger_enable_usb(bci, true);
> + if (dev == bci->ac.dev) {
> + twl4030_charger_enable_ac(bci, false);
> + bci->ac_mode = mode;
> + status = twl4030_charger_enable_ac(bci, true);
> + } else {
> + twl4030_charger_enable_usb(bci, false);
> + bci->usb_mode = mode;
> + status = twl4030_charger_enable_usb(bci, true);
> + }
> return (status == 0) ? n : status;
> }
>
> @@ -704,9 +716,13 @@ twl4030_bci_mode_show(struct device *dev,
> struct twl4030_bci *bci = dev_get_drvdata(dev->parent);
> int len = 0;
> int i;
> + int mode = bci->usb_mode;
> +
> + if (dev == bci->ac.dev)
> + mode = bci->ac_mode;
>
> for (i = 0; i < ARRAY_SIZE(modes); i++)
> - if (bci->usb_mode == i)
> + if (mode == i)
> len += snprintf(buf+len, PAGE_SIZE-len,
> "[%s] ", modes[i]);
> else
> @@ -900,6 +916,7 @@ static int __init twl4030_bci_probe(struct platform_device *pdev)
> else
> bci->usb_cur = 100000; /* 100mA */
> bci->usb_mode = CHARGE_AUTO;
> + bci->ac_mode = CHARGE_AUTO;
>
> bci->dev = &pdev->dev;
> bci->irq_chg = platform_get_irq(pdev, 0);
> @@ -988,10 +1005,12 @@ static int __init twl4030_bci_probe(struct platform_device *pdev)
> dev_warn(&pdev->dev, "could not create sysfs file\n");
> if (device_create_file(bci->usb.dev, &dev_attr_mode))
> dev_warn(&pdev->dev, "could not create sysfs file\n");
> + if (device_create_file(bci->ac.dev, &dev_attr_mode))
> + dev_warn(&pdev->dev, "could not create sysfs file\n");
> if (device_create_file(bci->ac.dev, &dev_attr_max_current))
> dev_warn(&pdev->dev, "could not create sysfs file\n");
>
> - twl4030_charger_enable_ac(true);
> + twl4030_charger_enable_ac(bci, true);
> if (!IS_ERR_OR_NULL(bci->transceiver))
> twl4030_bci_usb_ncb(&bci->usb_nb,
> bci->transceiver->last_event,
> @@ -1014,13 +1033,14 @@ static int __exit twl4030_bci_remove(struct platform_device *pdev)
> {
> struct twl4030_bci *bci = platform_get_drvdata(pdev);
>
> - twl4030_charger_enable_ac(false);
> + twl4030_charger_enable_ac(bci, false);
> twl4030_charger_enable_usb(bci, false);
> twl4030_charger_enable_backup(0, 0);
>
> device_remove_file(bci->usb.dev, &dev_attr_max_current);
> device_remove_file(bci->ac.dev, &dev_attr_max_current);
> device_remove_file(bci->usb.dev, &dev_attr_mode);
> + device_remove_file(bci->ac.dev, &dev_attr_mode);
> /* mask interrupts */
> twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
> TWL4030_INTERRUPTS_BCIIMR1A);
>
>
> --
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--
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