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authorMarek Belisko <marek@goldelico.com>2015-09-25 22:20:45 +0200
committerSebastian Reichel <sre@kernel.org>2015-09-26 19:10:09 +0200
commit2202e1fc5a29eab13fab31d287dd2019dc9edaa6 (patch)
tree15f4109443ee7beb4bce172e50668a68480b1caa /drivers/power
parentaf19161aaed7ff8d1a52b2e517460f2fa0774e32 (diff)
downloadlinux-2202e1fc5a29eab13fab31d287dd2019dc9edaa6.tar.bz2
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>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/twl4030_charger.c39
1 files changed, 27 insertions, 12 deletions
diff --git a/drivers/power/twl4030_charger.c b/drivers/power/twl4030_charger.c
index 74f2d3ff1d7c..bcd4dc304f27 100644
--- a/drivers/power/twl4030_charger.c
+++ b/drivers/power/twl4030_charger.c
@@ -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;
-}
-#else
-static inline int ac_available(void)
-{
- return 0;
+ int val, err;
+
+ if (!channel_vac)
+ return 0;
+
+ err = iio_read_channel_processed(channel_vac, &val);
+ if (err < 0)
+ return 0;
+ return val > 4500;
}
-#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);