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Date: Thu, 30 Aug 2012 11:41:01 +0000
From: "Kim, Milo" <Milo.Kim@...com>
To: Anton Vorontsov <cbouatmailru@...il.com>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
David Woodhouse <dwmw2@...radead.org>,
Anton Vorontsov <anton.vorontsov@...aro.org>
Subject: [PATCH 8/8] lp8727_charger: make cosmetic code
(a) change the return type of lp8727_is_charger_attached()
(b) remove unnecessary name comparison in lp8727_is_charger_attached()
(c) return as the result of function in lp8727_init_device()
(d) make inline function for lp8727_ctrl_switch()
(e) use specific definition rather than magic number in lp8727_delayed_func()
(f) make simple code in power_supply_get_properties
(g) make simple code in lp8727_charger_changed()
(h) fix checkpatch warning on MODULE_AUTHOR
(i) fit spaces for description in header
Signed-off-by: Milo(Woogyom) Kim <milo.kim@...com>
---
drivers/power/lp8727_charger.c | 77 ++++++++++++++++++----------------
include/linux/platform_data/lp8727.h | 2 +-
2 files changed, 41 insertions(+), 38 deletions(-)
diff --git a/drivers/power/lp8727_charger.c b/drivers/power/lp8727_charger.c
index 610d286..41bc0f3 100644
--- a/drivers/power/lp8727_charger.c
+++ b/drivers/power/lp8727_charger.c
@@ -121,14 +121,12 @@ static inline int lp8727_write_byte(struct lp8727_chg *pchg, u8 reg, u8 data)
return i2c_smbus_write_byte_data(pchg->client, reg, data);
}
-static int lp8727_is_charger_attached(const char *name, int id)
+static bool lp8727_is_charger_attached(const char *name, int id)
{
- if (name) {
- if (!strcmp(name, "ac"))
- return id == LP8727_CHG_TA || id == LP8727_CHG_DEDICATED;
- else if (!strcmp(name, "usb"))
- return id == LP8727_CHG_USB;
- }
+ if (!strcmp(name, "ac"))
+ return id == LP8727_CHG_TA || id == LP8727_CHG_DEDICATED;
+ else if (!strcmp(name, "usb"))
+ return id == LP8727_CHG_USB;
return id >= LP8727_CHG_TA && id <= LP8727_CHG_USB;
}
@@ -150,16 +148,13 @@ static int lp8727_init_device(struct lp8727_chg *pchg)
return ret;
val = LP8727_INT_EN | LP8727_CHGDET_EN;
- ret = lp8727_write_byte(pchg, LP8727_CTRL2, val);
- if (ret)
- return ret;
-
- return 0;
+ return lp8727_write_byte(pchg, LP8727_CTRL2, val);
}
static int lp8727_is_dedicated_charger(struct lp8727_chg *pchg)
{
u8 val;
+
lp8727_read_byte(pchg, LP8727_STATUS1, &val);
return val & LP8727_DCPORT;
}
@@ -167,11 +162,12 @@ static int lp8727_is_dedicated_charger(struct lp8727_chg *pchg)
static int lp8727_is_usb_charger(struct lp8727_chg *pchg)
{
u8 val;
+
lp8727_read_byte(pchg, LP8727_STATUS1, &val);
return val & LP8727_CHPORT;
}
-static void lp8727_ctrl_switch(struct lp8727_chg *pchg, u8 sw)
+static inline void lp8727_ctrl_switch(struct lp8727_chg *pchg, u8 sw)
{
lp8727_write_byte(pchg, LP8727_SWCTRL, sw);
}
@@ -221,11 +217,13 @@ static void lp8727_enable_chgdet(struct lp8727_chg *pchg)
static void lp8727_delayed_func(struct work_struct *_work)
{
- u8 intstat[2], idno, vbus;
- struct lp8727_chg *pchg =
- container_of(_work, struct lp8727_chg, work.work);
+ struct lp8727_chg *pchg = container_of(_work, struct lp8727_chg,
+ work.work);
+ u8 intstat[LP8788_NUM_INTREGS];
+ u8 idno;
+ u8 vbus;
- if (lp8727_read_bytes(pchg, LP8727_INT1, intstat, 2)) {
+ if (lp8727_read_bytes(pchg, LP8727_INT1, intstat, LP8788_NUM_INTREGS)) {
dev_err(pchg->dev, "can not read INT registers\n");
return;
}
@@ -308,9 +306,10 @@ static int lp8727_charger_get_property(struct power_supply *psy,
{
struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
- if (psp == POWER_SUPPLY_PROP_ONLINE)
- val->intval = lp8727_is_charger_attached(psy->name,
- pchg->chg_type);
+ if (psp != POWER_SUPPLY_PROP_ONLINE)
+ return 0;
+
+ val->intval = lp8727_is_charger_attached(psy->name, pchg->chg_type);
return 0;
}
@@ -338,15 +337,16 @@ static int lp8727_battery_get_property(struct power_supply *psy,
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
- if (lp8727_is_charger_attached(psy->name, pchg->chg_type)) {
- lp8727_read_byte(pchg, LP8727_STATUS1, &read);
+ if (!lp8727_is_charger_attached(psy->name, pchg->chg_type)) {
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ return 0;
+ }
+
+ lp8727_read_byte(pchg, LP8727_STATUS1, &read);
- val->intval = (read & LP8727_CHGSTAT) == LP8727_STAT_EOC ?
+ val->intval = (read & LP8727_CHGSTAT) == LP8727_STAT_EOC ?
POWER_SUPPLY_STATUS_FULL :
POWER_SUPPLY_STATUS_CHARGING;
- } else {
- val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
- }
break;
case POWER_SUPPLY_PROP_HEALTH:
lp8727_read_byte(pchg, LP8727_STATUS2, &read);
@@ -394,16 +394,20 @@ static int lp8727_battery_get_property(struct power_supply *psy,
static void lp8727_charger_changed(struct power_supply *psy)
{
struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
+ u8 eoc_level;
+ u8 ichg;
u8 val;
- u8 eoc_level, ichg;
-
- if (lp8727_is_charger_attached(psy->name, pchg->chg_type)) {
- if (pchg->chg_param) {
- eoc_level = pchg->chg_param->eoc_level;
- ichg = pchg->chg_param->ichg;
- val = (ichg << LP8727_ICHG_SHIFT) | eoc_level;
- lp8727_write_byte(pchg, LP8727_CHGCTRL2, val);
- }
+
+ /* skip if no charger exists */
+ if (!lp8727_is_charger_attached(psy->name, pchg->chg_type))
+ return;
+
+ /* update charging parameters */
+ if (pchg->chg_param) {
+ eoc_level = pchg->chg_param->eoc_level;
+ ichg = pchg->chg_param->ichg;
+ val = (ichg << LP8727_ICHG_SHIFT) | eoc_level;
+ lp8727_write_byte(pchg, LP8727_CHGCTRL2, val);
}
}
@@ -538,6 +542,5 @@ static struct i2c_driver lp8727_driver = {
module_i2c_driver(lp8727_driver);
MODULE_DESCRIPTION("TI/National Semiconductor LP8727 charger driver");
-MODULE_AUTHOR("Woogyom Kim <milo.kim@...com>, "
- "Daniel Jeong <daniel.jeong@...com>");
+MODULE_AUTHOR("Milo Kim <milo.kim@...com>, Daniel Jeong <daniel.jeong@...com>");
MODULE_LICENSE("GPL");
diff --git a/include/linux/platform_data/lp8727.h b/include/linux/platform_data/lp8727.h
index 5b443a1..b564d02 100644
--- a/include/linux/platform_data/lp8727.h
+++ b/include/linux/platform_data/lp8727.h
@@ -38,7 +38,7 @@ enum lp8727_ichg {
/**
* struct lp8727_chg_param
* @eoc_level : end of charge level setting
- * @ichg : charging current
+ * @ichg : charging current
*/
struct lp8727_chg_param {
enum lp8727_eoc_level eoc_level;
--
1.7.9.5
Best Regards,
Milo
--
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