Messages in this thread | | | Subject | Re: [PATCH v9 2/7] i2c: Add FSI-attached I2C master algorithm | From | Benjamin Herrenschmidt <> | Date | Tue, 05 Jun 2018 09:38:06 +1000 |
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On Mon, 2018-06-04 at 22:21 +0300, Andy Shevchenko wrote: > > +#define I2C_INT_ENABLE 0x0000ff80 > > +#define I2C_INT_ERR 0x0000fcc0 > > Now it looks like a flags combinations. > For me as for reader would be better to see quickly a decoded line. > > My proposal is to introduce something like following > > _INT_ALL GENMASK() > _INT_ENABLE (_INT_ALL & ~(_FOO | _BAR)) > _INT_ERR ... similar way as above ... > > What do you think?
I don't think this absolutely needs to change but yes, open coding is error prone. However I would think it more readable to use positive logic and just list all the bits that are *set* even if it's a bit more text:
#define I2C_INT_ERR (I2C_INT_INV_CMD |\ I2C_INT_PARITY |\ I2C_INT_BE_OVERRUN |\ .../...)
#define I2C_INT_ENABLE (I2C_INT_ERR |\ I2C_INT_DAT_REQ |\ I2C_INT_CMD_COMP)
Note: Eddie, I notice I2C_INT_BUSY is in "ERR" but not in "ENABLE", any reason for that ?
Cheers, Ben.
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