The TWSI_FREQUENCY macro was wrong in 2 ways:
1) It was casting the result of the calculations to an u8, while i2c clk
rates are often >= 100Khz which won't fit in a u8, drop the cast.
2) It had an extra factor of 2 in the divider which neither the datasheet nor
the Linux driver have.
The comment for the default value was wrongly saying that m lives in
bits 4-7, while in reality it is in bits 3-6, as can be seen from the correct
shift by 3 used in i2c_init().
While at it remove the unused twsi_actual_speed variable.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This rewrite of the mvtwsi driver is 25% smaller and much
faster and simpler than the previous code.
Signed-off-by: Albert Aribaud <albert.aribaud@free.fr>
Acked-by: Prafulla Wadaskar<prafulla@marvell.com>
Acked-by: Heiko Schocher<hs@denx.de>
This driver is not kirkwood-specific and can also be used
e.g. by orion5x. Rename to a SoC-neutral name.
Signed-off-by: Albert Aribaud <albert.aribaud@free.fr>
Acked-by: Prafulla Wadaskar<prafulla@marvell.com>
Acked-by: Heiko Schocher<hs@denx.de>
