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Date: Thu, 30 Aug 2012 05:12:53 -0700
From: Anton Vorontsov <anton.vorontsov@...aro.org>
To: "Kim, Milo" <Milo.Kim@...com>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
David Woodhouse <dwmw2@...radead.org>
Subject: Re: [PATCH 8/8] lp8727_charger: make cosmetic code
On Thu, Aug 30, 2012 at 11:41:01AM +0000, Kim, Milo wrote:
> (a) change the return type of lp8727_is_charger_attached()
> (b) remove unnecessary name comparison in lp8727_is_charger_attached()
This seems not too 'cosmetic'. Maybe a separate patch for this?
It looks trivial enough, but still, it's usually a good idea to
do one thing per patch.
> (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()
Ditto for these two.
> (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
--
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