spi/pl022: Allow request for higher frequency than maximum possible
authorViresh Kumar <viresh.kumar@st.com>
Thu, 19 Apr 2012 06:18:15 +0000 (11:48 +0530)
committerGrant Likely <grant.likely@secretlab.ca>
Fri, 27 Apr 2012 18:07:40 +0000 (12:07 -0600)
commitea505bc99f77f3f9db02bb965bd59ac5db063f60
treede89dabcfede2797cdecc224aa5224854db5232a
parent88a3a255a510ed193bf0cc35424761c3c9247586
spi/pl022: Allow request for higher frequency than maximum possible

Currently, if we request for frequency greater than maximum possible, spi driver
returns error.

For example, if the spi block src frequency is 333/4 MHz, i.e. 83.33.. MHz,
maximum frequency programmable would be src/2. Which would come around 41.6...

It is difficult to pass frequency in these figures. We normally try to program
in round figures, like 42 MHz and it should get programmed to <=
requested_frequency, i.e. 41.6...

For this to happen, we must not return error even if requested freq is higher
than max possible. But should program it to max possible.

Reported-by: Vinit Kamalaksha Shenoy <vinit.shenoy@st.com>
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
drivers/spi/spi-pl022.c