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i2c: busses: i2c-bcm2835: limits cdiv to allowed values
authorSilvan Wicki <linux_wi@tinag.ch>
Thu, 18 Jun 2015 09:10:11 +0000 (11:10 +0200)
committerWolfram Sang <wsa@the-dreams.de>
Tue, 23 Jun 2015 17:55:19 +0000 (19:55 +0200)
commita294aba164389a3d2c40dfcf5f3989a3bbfe38a2
tree079f75628fa91e1e19807aece7509912cb512b14tree | snapshot (tar.gz zip)
parent365322fb32e82b20758e8a18e3aa94692ce2a3d1commit | diff
i2c: busses: i2c-bcm2835: limits cdiv to allowed values

Checks if the cdiv value is in between min (0x2) and max (0xFFFE)
supported values by the bcm2835. If not, it returns -ENODEV.

See page 33/34 of BCM2835-ARM-Peripherals.pdf for the DIV register.
https://www.raspberrypi.org/wp-content/uploads/2012/02/BCM2835-ARM-Peripherals.pdf

Signed-off-by: Silvan Wicki <linux_wi@tinag.ch>
[wsa: resolved a merge conflict]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
drivers/i2c/busses/i2c-bcm2835.c diff | blob | blame | history