diff options
author | Shawn Guo <shawn.guo@linaro.org> | 2012-04-12 20:50:18 +0800 |
---|---|---|
committer | Mike Turquette <mturquette@linaro.org> | 2012-04-24 16:37:40 -0700 |
commit | 1c0035d710dd3bfa86d58f851b8737c7f11a9bbc (patch) | |
tree | 37ebd1a44c408aecf7df5331d2b5a32e81818baf /include | |
parent | 81536e072b54e30bbfd1a9a6b8094f7b3dd5321c (diff) |
clk: pass parent_rate into .set_rate
For most of .set_rate implementation, parent_rate will be used, so just
like passing parent_rate into .recalc_rate, let's pass parent_rate into
.set_rate too.
It also updates the kernel doc for .set_rate ops.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/clk-provider.h | 21 |
1 files changed, 7 insertions, 14 deletions
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index 3323d24a7be4..cb82918d8fe0 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -88,19 +88,11 @@ struct clk_hw { * array index into the value programmed into the hardware. * Returns 0 on success, -EERROR otherwise. * - * @set_rate: Change the rate of this clock. If this callback returns - * CLK_SET_RATE_PARENT, the rate change will be propagated to the - * parent clock (which may propagate again if the parent clock - * also sets this flag). The requested rate of the parent is - * passed back from the callback in the second 'unsigned long *' - * argument. Note that it is up to the hardware clock's set_rate - * implementation to insure that clocks do not run out of spec - * when propgating the call to set_rate up to the parent. One way - * to do this is to gate the clock (via clk_disable and/or - * clk_unprepare) before calling clk_set_rate, then ungating it - * afterward. If your clock also has the CLK_GATE_SET_RATE flag - * set then this will insure safety. Returns 0 on success, - * -EERROR otherwise. + * @set_rate: Change the rate of this clock. The requested rate is specified + * by the second argument, which should typically be the return + * of .round_rate call. The third argument gives the parent rate + * which is likely helpful for most .set_rate implementation. + * Returns 0 on success, -EERROR otherwise. * * The clk_enable/clk_disable and clk_prepare/clk_unprepare pairs allow * implementations to split any work between atomic (enable) and sleepable @@ -125,7 +117,8 @@ struct clk_ops { unsigned long *); int (*set_parent)(struct clk_hw *hw, u8 index); u8 (*get_parent)(struct clk_hw *hw); - int (*set_rate)(struct clk_hw *hw, unsigned long); + int (*set_rate)(struct clk_hw *hw, unsigned long, + unsigned long); void (*init)(struct clk_hw *hw); }; |