4 Commits

Author	SHA1	Message	Date
Stephen Boyd	d122db7e86	clk: basic-types: Remove useless allocation failure printks ... Printing an error on kmalloc() failures is unnecessary. Remove the print and use *ptr in sizeof() for future-proof code. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>	2015-05-14 16:51:50 -07:00
Heikki Krogerus	6b54783620	clk: fractional-divider: support for divider bypassing ... If the divider or multiplier values are 0 in the register, bypassing the divider and returning the parent clock rate in clk_fd_recalc_rate(). Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Michael Turquette <mturquette@linaro.org> [mturquette@linaro.org: fixed commitlog typo]	2015-03-12 12:18:47 -07:00
Heiko Stübner	feaefa0ea1	clk: fractional-divider: cast parent_rate to u64 before multiplying ... On 32bit architectures, like ARM calculating the fractional rate will do the multiplication before converting the value to u64 when it gets assigned to ret, which can produce overflows. The error in question happened with a parent_rate of 386MHz, m = 3000, n = 60000, which resulted in a wrong rate value of 15812Hz. Therefore cast parent_rate to u64 to make sure the multiplication happens in a 64bit space and produces the correct 192MHz in the example. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mike Turquette <mturquette@linaro.org>	2014-09-10 09:42:37 -07:00
Heikki Krogerus	e2d0e90fae	clk: new basic clk type for fractional divider ... Fractional divider clocks are fairly common. This adds basic type for them. Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Acked-by: Mike Turquette <mturquette@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>	2014-05-20 13:34:02 +02:00