[PATCH 13/15] twl4030_charger: add ac/mode to match usb/mode

NeilBrown
2015-02-24T20:57:36Z

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@suse.de>
---
drivers/power/twl4030_charger.c | 40 +++++++++++++++++++++++++++++----------
1 file changed, 30 insertions(+), 10 deletions(-)

diff --git a/drivers/power/twl4030_charger.c b/drivers/power/twl4030_charger.c
index 6c53f0b601a4..e5a0225ea87e 100644
--- 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);