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drivers: power: twl4030_charger: fix link problems when building as module 

If either twl4030_charger or twl4030_madc is configured as MODULE,
we get build (link) errors.

To solve, the direct call of twl4030_get_madc_conversion() is replaced
by a call to iio_read_channel_processed().

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Signed-off-by: Marek Belisko <marek@goldelico.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Marek Belisko 2015-09-25 22:20:45 +02:00 committed by Sebastian Reichel
parent af19161aae
commit 2202e1fc5a
1 changed files with 27 additions and 12 deletions
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39
drivers/power/twl4030_charger.c
View File

@ -22,7 +22,7 @@
#include <linux/power_supply.h>
#include <linux/notifier.h>
#include <linux/usb/otg.h>
#include <linux/i2c/twl4030-madc.h>
#include <linux/iio/consumer.h>
#define TWL4030_BCIMDEN 0x00
#define TWL4030_BCIMDKEY 0x01
@ -91,21 +91,23 @@
#define TWL4030_MSTATEC_COMPLETE1 0x0b
#define TWL4030_MSTATEC_COMPLETE4 0x0e
#if IS_REACHABLE(CONFIG_TWL4030_MADC)
/*
* If AC (Accessory Charger) voltage exceeds 4.5V (MADC 11)
* then AC is available.
*/
static inline int ac_available(void)
static inline int ac_available(struct iio_channel *channel_vac)
{
return twl4030_get_madc_conversion(11) > 4500;
int val, err;
if (!channel_vac)
return 0;
err = iio_read_channel_processed(channel_vac, &val);
if (err < 0)
return 0;
return val > 4500;
}
#else
static inline int ac_available(void)
{
return 0;
}
#endif
static bool allow_usb;
module_param(allow_usb, bool, 0644);
MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current");
@ -128,6 +130,7 @@ struct twl4030_bci {
*/
unsigned int ichg_eoc, ichg_lo, ichg_hi;
unsigned int usb_cur, ac_cur;
struct iio_channel *channel_vac;
bool ac_is_active;
int usb_mode, ac_mode; /* charging mode requested */
#define CHARGE_OFF 0
@ -278,7 +281,7 @@ static int twl4030_charger_update_current(struct twl4030_bci *bci)
* If AC (Accessory Charger) voltage exceeds 4.5V (MADC 11)
* and AC is enabled, set current for 'ac'
*/
if (ac_available()) {
if (ac_available(bci->channel_vac)) {
cur = bci->ac_cur;
bci->ac_is_active = true;
} else {
@ -1048,6 +1051,12 @@ static int twl4030_bci_probe(struct platform_device *pdev)
return ret;
}
bci->channel_vac = iio_channel_get(&pdev->dev, "vac");
if (IS_ERR(bci->channel_vac)) {
bci->channel_vac = NULL;
dev_warn(&pdev->dev, "could not request vac iio channel");
}
INIT_WORK(&bci->work, twl4030_bci_usb_work);
INIT_DELAYED_WORK(&bci->current_worker, twl4030_current_worker);
@ -1069,7 +1078,7 @@ static int twl4030_bci_probe(struct platform_device *pdev)
TWL4030_INTERRUPTS_BCIIMR1A);
if (ret < 0) {
dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
return ret;
goto fail;
}
reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV);
@ -1102,6 +1111,10 @@ static int twl4030_bci_probe(struct platform_device *pdev)
twl4030_charger_enable_backup(0, 0);
return 0;
fail:
iio_channel_release(bci->channel_vac);
return ret;
}
static int __exit twl4030_bci_remove(struct platform_device *pdev)
@ -1112,6 +1125,8 @@ static int __exit twl4030_bci_remove(struct platform_device *pdev)
twl4030_charger_enable_usb(bci, false);
twl4030_charger_enable_backup(0, 0);
iio_channel_release(bci->channel_vac);
device_remove_file(&bci->usb->dev, &dev_attr_max_current);
device_remove_file(&bci->usb->dev, &dev_attr_mode);
device_remove_file(&bci->ac->dev, &dev_attr_max_current);