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Date: Thu, 13 Jun 2013 15:31:51 +0100 From: James Hogan <james.hogan@...tec.com> To: Stephen Boyd <sboyd@...eaurora.org> CC: Mike Turquette <mturquette@...aro.org>, <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>, Saravana Kannan <skannan@...eaurora.org> Subject: Re: [PATCH v4 3/5] clk: add support for clock reparent on set_rate On 20/05/13 22:17, Stephen Boyd wrote: > On 05/20/13 06:28, James Hogan wrote: >> diff --git a/Documentation/clk.txt b/Documentation/clk.txt >> index b9911c2..3110ba4 100644 >> --- a/Documentation/clk.txt >> +++ b/Documentation/clk.txt >> @@ -70,6 +70,10 @@ the operations defined in clk.h: >> unsigned long parent_rate); >> long (*round_rate)(struct clk_hw *hw, unsigned long, >> unsigned long *); >> + long (*determine_rate)(struct clk_hw *hw, >> + unsigned long rate, >> + unsigned long *best_parent_rate, >> + struct clk **best_parent_clk); >> 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); > > Can you update the clock hardware characteristics table as well? > Yep, I'll add the hunk below to the patch in the next version. Cheers James @@ -179,26 +183,28 @@ mandatory, a cell marked as "n" implies that either including that callback is invalid or otherwise unnecessary. Empty cells are either optional or must be evaluated on a case-by-case basis. - clock hardware characteristics - ----------------------------------------------------------- - | gate | change rate | single parent | multiplexer | root | - |------|-------------|---------------|-------------|------| -.prepare | | | | | | -.unprepare | | | | | | - | | | | | | -.enable | y | | | | | -.disable | y | | | | | -.is_enabled | y | | | | | - | | | | | | -.recalc_rate | | y | | | | -.round_rate | | y | | | | -.set_rate | | y | | | | - | | | | | | -.set_parent | | | n | y | n | -.get_parent | | | n | y | n | - | | | | | | -.init | | | | | | - ----------------------------------------------------------- + clock hardware characteristics + ----------------------------------------------------------- + | gate | change rate | single parent | multiplexer | root | + |------|-------------|---------------|-------------|------| +.prepare | | | | | | +.unprepare | | | | | | + | | | | | | +.enable | y | | | | | +.disable | y | | | | | +.is_enabled | y | | | | | + | | | | | | +.recalc_rate | | y | | | | +.round_rate | | y [1] | | | | +.determine_rate | | y [1] | | | | +.set_rate | | y | | | | + | | | | | | +.set_parent | | | n | y | n | +.get_parent | | | n | y | n | + | | | | | | +.init | | | | | | + ----------------------------------------------------------- +[1] either one of round_rate or determine_rate is required. Finally, register your clock at run-time with a hardware-specific registration function. This function simply populates struct clk_foo's -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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