On Mon, Oct 01, 2012 at 07:16:23PM -0400, Vivien Didelot wrote: > * Remove unused macros; > * Point to the documentation; > * Coding Style fixes (Kernel Doc, spacing); > * Move driver declaration to avoid adding function prototypes. > > Signed-off-by: Vivien Didelot <vivien.dide...@savoirfairelinux.com>
Hi Vivien, > --- > drivers/hwmon/ads7828.c | 91 > +++++++++++++++++++++++-------------------------- > 1 file changed, 43 insertions(+), 48 deletions(-) > > diff --git a/drivers/hwmon/ads7828.c b/drivers/hwmon/ads7828.c > index bf3fdf4..fb3010d 100644 > --- a/drivers/hwmon/ads7828.c > +++ b/drivers/hwmon/ads7828.c > @@ -6,7 +6,7 @@ > * > * Written by Steve Hardy <sha...@redhat.com> > * > - * Datasheet available at: http://focus.ti.com/lit/ds/symlink/ads7828.pdf > + * For further information, see the Documentation/hwmon/ads7828 file. > * > * This program is free software; you can redistribute it and/or modify > * it under the terms of the GNU General Public License as published by > @@ -34,14 +34,12 @@ > #include <linux/mutex.h> > > /* The ADS7828 registers */ > -#define ADS7828_NCH 8 /* 8 channels of 12-bit A-D supported */ > -#define ADS7828_CMD_SD_SE 0x80 /* Single ended inputs */ > -#define ADS7828_CMD_SD_DIFF 0x00 /* Differential inputs */ > -#define ADS7828_CMD_PD0 0x0 /* Power Down between A-D conversions */ > -#define ADS7828_CMD_PD1 0x04 /* Internal ref OFF && A-D ON */ > -#define ADS7828_CMD_PD2 0x08 /* Internal ref ON && A-D OFF */ > -#define ADS7828_CMD_PD3 0x0C /* Internal ref ON && A-D ON */ > -#define ADS7828_INT_VREF_MV 2500 /* Internal vref is 2.5V, 2500mV */ > +#define ADS7828_NCH 8 /* 8 channels supported */ > +#define ADS7828_CMD_SD_SE 0x80 /* Single ended inputs */ > +#define ADS7828_CMD_SD_DIFF 0x00 /* Differential inputs */ > +#define ADS7828_CMD_PD1 0x04 /* Internal ref OFF && A/D ON */ > +#define ADS7828_CMD_PD3 0x0C /* Internal ref ON && A/D ON */ > +#define ADS7828_INT_VREF_MV 2500 /* Internal vref is 2.5V, 2500mV */ > > /* Addresses to scan */ > static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, > @@ -59,25 +57,26 @@ module_param(vref_mv, int, S_IRUGO); > static u8 ads7828_cmd_byte; /* cmd byte without channel bits */ > static unsigned int ads7828_lsb_resol; /* resolution of the ADC sample lsb */ > > -/* Each client has this additional data */ > +/** > + * struct ads7828_data - client specific data > + * @hwmon_dev: The hwmon device. > + * @update_lock: Mutex protecting updates. > + * @valid: Validity flag. > + * @last_updated: Last updated time (in jiffies). > + * @adc_input: ADS7828_NCH samples. > + */ This isn't really an externally visible API, so I wonder if it provides value to document it this way. No strong opinion, just wondering. > struct ads7828_data { > struct device *hwmon_dev; > - struct mutex update_lock; /* mutex protect updates */ > - char valid; /* !=0 if following fields are valid */ > - unsigned long last_updated; /* In jiffies */ > - u16 adc_input[ADS7828_NCH]; /* ADS7828_NCH 12-bit samples */ > + struct mutex update_lock; > + char valid; > + unsigned long last_updated; > + u16 adc_input[ADS7828_NCH]; > }; > > -/* Function declaration - necessary due to function dependencies */ > -static int ads7828_detect(struct i2c_client *client, > - struct i2c_board_info *info); > -static int ads7828_probe(struct i2c_client *client, > - const struct i2c_device_id *id); > - > static inline u8 channel_cmd_byte(int ch) > { > /* cmd byte C2,C1,C0 - see datasheet */ > - u8 cmd = (((ch>>1) | (ch&0x01)<<2)<<4); > + u8 cmd = (((ch >> 1) | (ch & 0x01) << 2) << 4); > cmd |= ads7828_cmd_byte; > return cmd; > } > @@ -120,9 +119,8 @@ static ssize_t show_in(struct device *dev, struct > device_attribute *da, > ads7828_lsb_resol)/1000); Can you fix this one as well since you are at it ? There is another one in sensors_ads7828_init(). [ Wonder why checkpatch doesn't complain about it ] > } > > -#define in_reg(offset)\ > -static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in,\ > - NULL, offset) > +#define in_reg(offset) \ > +static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in, NULL, offset) > This causes a checkpatch error - checkpatch doesn't like the multi-line macros. > in_reg(0); > in_reg(1); Since it seems to be hardly worth it anyway (yes, I know there are 8 of them), would be great if you can just get rid of the macro and just use static SENSOR_DEVICE_ATTR(in[1-8]_input, ...) instead. > @@ -158,25 +156,6 @@ static int ads7828_remove(struct i2c_client *client) > return 0; > } > > -static const struct i2c_device_id ads7828_id[] = { > - { "ads7828", 0 }, > - { } > -}; > -MODULE_DEVICE_TABLE(i2c, ads7828_id); > - > -/* This is the driver that will be inserted */ > -static struct i2c_driver ads7828_driver = { > - .class = I2C_CLASS_HWMON, > - .driver = { > - .name = "ads7828", > - }, > - .probe = ads7828_probe, > - .remove = ads7828_remove, > - .id_table = ads7828_id, > - .detect = ads7828_detect, > - .address_list = normal_i2c, > -}; > - > /* Return 0 if detection is successful, -ENODEV otherwise */ > static int ads7828_detect(struct i2c_client *client, > struct i2c_board_info *info) > @@ -247,13 +226,29 @@ exit: > return err; > } > > +static const struct i2c_device_id ads7828_ids[] = { > + { "ads7828", 0 }, > + { } > +}; > +MODULE_DEVICE_TABLE(i2c, ads7828_ids); > + > +static struct i2c_driver ads7828_driver = { > + .class = I2C_CLASS_HWMON, > + .driver = { > + .name = "ads7828", > + }, > + .address_list = normal_i2c, > + .detect = ads7828_detect, > + .probe = ads7828_probe, > + .remove = ads7828_remove, > + .id_table = ads7828_ids, > +}; > + > static int __init sensors_ads7828_init(void) > { > /* Initialize the command byte according to module parameters */ > - ads7828_cmd_byte = se_input ? > - ADS7828_CMD_SD_SE : ADS7828_CMD_SD_DIFF; > - ads7828_cmd_byte |= int_vref ? > - ADS7828_CMD_PD3 : ADS7828_CMD_PD1; > + ads7828_cmd_byte = se_input ? ADS7828_CMD_SD_SE : ADS7828_CMD_SD_DIFF; > + ads7828_cmd_byte |= int_vref ? ADS7828_CMD_PD3 : ADS7828_CMD_PD1; > > /* Calculate the LSB resolution */ > ads7828_lsb_resol = (vref_mv*1000)/4096; > @@ -267,7 +262,7 @@ static void __exit sensors_ads7828_exit(void) > } > > MODULE_AUTHOR("Steve Hardy <sha...@redhat.com>"); > -MODULE_DESCRIPTION("ADS7828 driver"); > +MODULE_DESCRIPTION("Driver for TI ADS7828 A/D converter"); > MODULE_LICENSE("GPL"); > > module_init(sensors_ads7828_init); > -- > 1.7.11.4 > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
