Supports EG20T ptp clock in the driver

Changes e-mail address.

Adds number.
Signed-off-by: NTakahiro Shimizu <tshimizu818@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The clock_getres() function must return the resolution in the timespec
argument and return 0 for success.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Acked-by: NJohn Stultz <john.stultz@linaro.org>
Cc: stable@kernel.org
Cc: Richard Cochran <richard.cochran@omicron.at>

In ptp_read there is an unlock missing on an error path, and a double
unlock on another error path.
Signed-off-by: NDan Carpenter <error27@gmail.com>
Acked-by: NRichard Cochran <richard.cochran@omicron.at>
Signed-off-by: NJohn Stultz <john.stultz@linaro.org>

copy_to_user() returns the number of bytes remaining, but we want a
negative error code in ptp_ioctl.
Signed-off-by: NDan Carpenter <error27@gmail.com>
Acked-by: NRichard Cochran <richard.cochran@omicron.at>
Signed-off-by: NJohn Stultz <john.stultz@linaro.org>

This patch adds support for the PTP clock found on the DP83640.
The basic clock operations and one external time stamp have
been implemented.
Signed-off-by: NRichard Cochran <richard.cochran@omicron.at>
Signed-off-by: NJohn Stultz <john.stultz@linaro.org>

This patch adds a driver for the hardware time stamping unit found on the
IXP465. The basic clock operations and an external trigger are implemented.
Signed-off-by: NRichard Cochran <richard.cochran@omicron.at>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Acked-by: NJohn Stultz <john.stultz@linaro.org>
Acked-by: NKrzysztof Halasa <khc@pm.waw.pl>
Signed-off-by: NJohn Stultz <john.stultz@linaro.org>

The eTSEC includes a PTP clock with quite a few features. This patch adds
support for the basic clock adjustment functions, plus two external time
stamps, one alarm, and the PPS callback.
Signed-off-by: NRichard Cochran <richard.cochran@omicron.at>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Acked-by: NJohn Stultz <john.stultz@linaro.org>
Signed-off-by: NJohn Stultz <john.stultz@linaro.org>

This patch adds an infrastructure for hardware clocks that implement
IEEE 1588, the Precision Time Protocol (PTP). A class driver offers a
registration method to particular hardware clock drivers. Each clock is
presented as a standard POSIX clock.

The ancillary clock features are exposed in two different ways, via
the sysfs and by a character device.
Signed-off-by: NRichard Cochran <richard.cochran@omicron.at>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NJohn Stultz <john.stultz@linaro.org>