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SubjectRe: [PATCH 1/8] iio: accel: mma9553: coding style fixes
On 08/04/15 15:37, Irina Tirdea wrote:
> Fix a couple of coding style issues including:
> * issues reported by checkpatch.pl --strict
> * add mma9553_ prefix to all local functions/declarations
> * fix documentation
> * use GENMASK instead of direct masks
> * fix code alignment
>
> Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
> Suggested-by: Hartmut Knaack <knaack.h@gmx.de>
Please break this up into smaller focused patches as it's a mixture of
various different things.

First high urgency patches:

Typo fixes
Wrong docs fixes

Then lower urgency (nice to have ones)

Prefixing naming
GENMASK
Aligment

So I'd say at least 5 short patches.
> ---
> drivers/iio/accel/mma9551_core.c | 8 ++--
> drivers/iio/accel/mma9551_core.h | 2 +-
> drivers/iio/accel/mma9553.c | 98 ++++++++++++++++++++--------------------
> 3 files changed, 55 insertions(+), 53 deletions(-)
>
> diff --git a/drivers/iio/accel/mma9551_core.c b/drivers/iio/accel/mma9551_core.c
> index 7f55a6d..54b3ae6 100644
> --- a/drivers/iio/accel/mma9551_core.c
> +++ b/drivers/iio/accel/mma9551_core.c
> @@ -374,7 +374,7 @@ EXPORT_SYMBOL(mma9551_read_status_word);
> * @app_id: Application ID
> * @reg: Application register
> * @len: Length of array to read in bytes
> - * @val: Array of words to read
> + * @buf: Array of words to read
wrong docs aren't a style fix and probably want to go in faster so
please break these out into a separate patch.
> *
> * Read multiple configuration registers (word-sized registers).
> *
> @@ -409,7 +409,7 @@ EXPORT_SYMBOL(mma9551_read_config_words);
> * @app_id: Application ID
> * @reg: Application register
> * @len: Length of array to read in bytes
> - * @val: Array of words to read
> + * @buf: Array of words to read
> *
> * Read multiple status registers (word-sized registers).
> *
> @@ -444,7 +444,7 @@ EXPORT_SYMBOL(mma9551_read_status_words);
> * @app_id: Application ID
> * @reg: Application register
> * @len: Length of array to write in bytes
> - * @val: Array of words to write
> + * @buf: Array of words to write
> *
> * Write multiple configuration registers (word-sized registers).
> *
> @@ -785,7 +785,7 @@ EXPORT_SYMBOL(mma9551_read_accel_scale);
> */
> int mma9551_app_reset(struct i2c_client *client, u32 app_mask)
> {
> - return mma9551_write_config_byte(client, MMA9551_APPID_RCS,
This isn't a style fix. I'm guessing it is a straight fix for a typo?
Please break this out to it's own patch. More important than style fixes.

> + return mma9551_write_config_byte(client, MMA9551_APPID_RSC,
> MMA9551_RSC_RESET +
> MMA9551_RSC_OFFSET(app_mask),
> MMA9551_RSC_VAL(app_mask));
> diff --git a/drivers/iio/accel/mma9551_core.h b/drivers/iio/accel/mma9551_core.h
> index edaa56b..79939e4 100644
> --- a/drivers/iio/accel/mma9551_core.h
> +++ b/drivers/iio/accel/mma9551_core.h
> @@ -22,7 +22,7 @@
> #define MMA9551_APPID_TILT 0x0B
> #define MMA9551_APPID_SLEEP_WAKE 0x12
> #define MMA9551_APPID_PEDOMETER 0x15
> -#define MMA9551_APPID_RCS 0x17
> +#define MMA9551_APPID_RSC 0x17
> #define MMA9551_APPID_NONE 0xff
>
> /* Reset/Suspend/Clear application app masks */
> diff --git a/drivers/iio/accel/mma9553.c b/drivers/iio/accel/mma9553.c
> index 2df1af7..d095f81 100644
> --- a/drivers/iio/accel/mma9553.c
> +++ b/drivers/iio/accel/mma9553.c
> @@ -54,6 +54,7 @@
> #define MMA9553_MASK_CONF_STEPCOALESCE GENMASK(7, 0)
>
> #define MMA9553_REG_CONF_ACTTHD 0x0E
> +#define MMA9553_MAX_ACTTHD GENMASK(15, 0)
>
> /* Pedometer status registers (R-only) */
> #define MMA9553_REG_STATUS 0x00
> @@ -62,8 +63,8 @@
> #define MMA9553_MASK_STATUS_STEPCHG BIT(13)
> #define MMA9553_MASK_STATUS_ACTCHG BIT(12)
> #define MMA9553_MASK_STATUS_SUSP BIT(11)
> -#define MMA9553_MASK_STATUS_ACTIVITY (BIT(10) | BIT(9) | BIT(8))
> -#define MMA9553_MASK_STATUS_VERSION 0x00FF
> +#define MMA9553_MASK_STATUS_ACTIVITY GENMASK(10, 8)
> +#define MMA9553_MASK_STATUS_VERSION GENMASK(7, 0)
>
> #define MMA9553_REG_STEPCNT 0x02
> #define MMA9553_REG_DISTANCE 0x04
> @@ -75,14 +76,14 @@
> #define MMA9553_DEFAULT_GPIO_PIN mma9551_gpio6
> #define MMA9553_DEFAULT_GPIO_POLARITY 0
>
> -/* Bitnum used for gpio configuration = bit number in high status byte */
> -#define STATUS_TO_BITNUM(bit) (ffs(bit) - 9)
> +/* Bitnum used for GPIO configuration = bit number in high status byte */
> +#define MMA9553_STATUS_TO_BITNUM(bit) (ffs(bit) - 9)
>
> #define MMA9553_DEFAULT_SAMPLE_RATE 30 /* Hz */
>
> /*
> * The internal activity level must be stable for ACTTHD samples before
> - * ACTIVITY is updated.The ACTIVITY variable contains the current activity
> + * ACTIVITY is updated. The ACTIVITY variable contains the current activity
> * level and is updated every time a step is detected or once a second
> * if there are no steps.
> */
> @@ -343,21 +344,21 @@ static int mma9553_conf_gpio(struct mma9553_data *data)
> struct mma9553_event *ev_step_detect;
> bool activity_enabled;
>
> - activity_enabled =
> - mma9553_is_any_event_enabled(data, true, IIO_ACTIVITY);
> - ev_step_detect =
> - mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD, IIO_EV_DIR_NONE);
> + activity_enabled = mma9553_is_any_event_enabled(data, true,
> + IIO_ACTIVITY);
> + ev_step_detect = mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD,
> + IIO_EV_DIR_NONE);
This is defintlely a matter of taste rather than required, but fair enough
in a style cleanup patch.
>
> /*
> * If both step detector and activity are enabled, use the MRGFL bit.
> * This bit is the logical OR of the SUSPCHG, STEPCHG, and ACTCHG flags.
> */
> if (activity_enabled && ev_step_detect->enabled)
> - bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_MRGFL);
> + bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_MRGFL);
> else if (ev_step_detect->enabled)
> - bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_STEPCHG);
> + bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_STEPCHG);
> else if (activity_enabled)
> - bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_ACTCHG);
> + bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_ACTCHG);
> else /* Reset */
> appid = MMA9551_APPID_NONE;
>
> @@ -365,13 +366,15 @@ static int mma9553_conf_gpio(struct mma9553_data *data)
> return 0;
>
> /* Save initial values for activity and stepcnt */
> - if (activity_enabled || ev_step_detect->enabled)
> - mma9553_read_activity_stepcnt(data, &data->activity,
> - &data->stepcnt);
> + if (activity_enabled || ev_step_detect->enabled) {
> + ret = mma9553_read_activity_stepcnt(data, &data->activity,
> + &data->stepcnt);
> + if (ret < 0)
> + return ret;
> + }
>
> - ret = mma9551_gpio_config(data->client,
> - MMA9553_DEFAULT_GPIO_PIN,
> - appid, bitnum, MMA9553_DEFAULT_GPIO_POLARITY);
> + ret = mma9551_gpio_config(data->client, MMA9553_DEFAULT_GPIO_PIN, appid,
> + bitnum, MMA9553_DEFAULT_GPIO_POLARITY);
> if (ret < 0)
> return ret;
> data->gpio_bitnum = bitnum;
> @@ -392,19 +395,19 @@ static int mma9553_init(struct mma9553_data *data)
> * a device identification command to differentiate the MMA9553L
> * from the MMA9550L.
> */
> - ret =
> - mma9551_read_config_words(data->client, MMA9551_APPID_PEDOMETER,
> - MMA9553_REG_CONF_SLEEPMIN,
> - sizeof(data->conf), (u16 *) &data->conf);
> + ret = mma9551_read_config_words(data->client, MMA9551_APPID_PEDOMETER,
> + MMA9553_REG_CONF_SLEEPMIN,
> + sizeof(data->conf),
> + (u16 *)&data->conf);
> if (ret < 0) {
> dev_err(&data->client->dev,
> - "device is not MMA9553L: failed to read cfg regs\n");
> + "failed to read configuration registers\n");
> return ret;
> }
>
>
> - /* Reset gpio */
> data->gpio_bitnum = -1;
> + /* Reset GPIO */
> ret = mma9553_conf_gpio(data);
> if (ret < 0)
> return ret;
> @@ -417,18 +420,18 @@ static int mma9553_init(struct mma9553_data *data)
> data->conf.sleepmin = MMA9553_DEFAULT_SLEEPMIN;
> data->conf.sleepmax = MMA9553_DEFAULT_SLEEPMAX;
> data->conf.sleepthd = MMA9553_DEFAULT_SLEEPTHD;
> - data->conf.config =
> - mma9553_set_bits(data->conf.config, 1, MMA9553_MASK_CONF_CONFIG);
> + data->conf.config = mma9553_set_bits(data->conf.config, 1,
> + MMA9553_MASK_CONF_CONFIG);
> /*
> * Clear the activity debounce counter when the activity level changes,
> * so that the confidence level applies for any activity level.
> */
> data->conf.config = mma9553_set_bits(data->conf.config, 1,
> MMA9553_MASK_CONF_ACT_DBCNTM);
> - ret =
> - mma9551_write_config_words(data->client, MMA9551_APPID_PEDOMETER,
> - MMA9553_REG_CONF_SLEEPMIN,
> - sizeof(data->conf), (u16 *) &data->conf);
> + ret = mma9551_write_config_words(data->client, MMA9551_APPID_PEDOMETER,
> + MMA9553_REG_CONF_SLEEPMIN,
> + sizeof(data->conf),
> + (u16 *)&data->conf);
> if (ret < 0) {
> dev_err(&data->client->dev,
> "failed to write configuration registers\n");
> @@ -791,7 +794,7 @@ static int mma9553_write_event_config(struct iio_dev *indio_dev,
>
> mutex_unlock(&data->mutex);
>
> - return ret;
> + return 0;
>
> err_conf_gpio:
> if (state) {
> @@ -896,7 +899,7 @@ static int mma9553_get_calibgender_mode(struct iio_dev *indio_dev,
> gender = mma9553_get_bits(data->conf.filter, MMA9553_MASK_CONF_MALE);
> /*
> * HW expects 0 for female and 1 for male,
> - * while iio index is 0 for male and 1 for female
> + * while iio index is 0 for male and 1 for female.
> */
> return !gender;
> }
> @@ -943,11 +946,11 @@ static const struct iio_event_spec mma9553_activity_events[] = {
> },
> };
>
> -static const char * const calibgender_modes[] = { "male", "female" };
> +static const char * const mma9553_calibgender_modes[] = { "male", "female" };
>
> static const struct iio_enum mma9553_calibgender_enum = {
> - .items = calibgender_modes,
> - .num_items = ARRAY_SIZE(calibgender_modes),
> + .items = mma9553_calibgender_modes,
> + .num_items = ARRAY_SIZE(mma9553_calibgender_modes),
> .get = mma9553_get_calibgender_mode,
> .set = mma9553_set_calibgender_mode,
> };
> @@ -1054,16 +1057,15 @@ static irqreturn_t mma9553_event_handler(int irq, void *private)
> return IRQ_HANDLED;
> }
>
> - ev_prev_activity =
> - mma9553_get_event(data, IIO_ACTIVITY,
> - mma9553_activity_to_mod(data->activity),
> - IIO_EV_DIR_FALLING);
> - ev_activity =
> - mma9553_get_event(data, IIO_ACTIVITY,
> - mma9553_activity_to_mod(activity),
> - IIO_EV_DIR_RISING);
> - ev_step_detect =
> - mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD, IIO_EV_DIR_NONE);
> + ev_prev_activity = mma9553_get_event(data, IIO_ACTIVITY,
> + mma9553_activity_to_mod(
> + data->activity),
> + IIO_EV_DIR_FALLING);
> + ev_activity = mma9553_get_event(data, IIO_ACTIVITY,
> + mma9553_activity_to_mod(activity),
> + IIO_EV_DIR_RISING);
> + ev_step_detect = mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD,
> + IIO_EV_DIR_NONE);
>
> if (ev_step_detect->enabled && (stepcnt != data->stepcnt)) {
> data->stepcnt = stepcnt;
> @@ -1108,16 +1110,16 @@ static int mma9553_gpio_probe(struct i2c_client *client)
>
> dev = &client->dev;
>
> - /* data ready gpio interrupt pin */
> + /* data ready GPIO interrupt pin */
> gpio = devm_gpiod_get_index(dev, MMA9553_GPIO_NAME, 0, GPIOD_IN);
> if (IS_ERR(gpio)) {
> - dev_err(dev, "acpi gpio get index failed\n");
> + dev_err(dev, "ACPI GPIO get index failed\n");
> return PTR_ERR(gpio);
> }
>
> ret = gpiod_to_irq(gpio);
>
> - dev_dbg(dev, "gpio resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
> + dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
>
> return ret;
> }
>



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