[RFC PATCH] clk: add extension API
From: Rajendra Nayak <hidden>
Date: 2012-05-30 09:28:31
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Hi Peter, On Tuesday 29 May 2012 03:28 PM, Peter De Schrijver wrote:
Add an extension API for clocks. This allows clocktypes to provide extensions for features which are uncommon and cannot be easily mapped onto normal clock framework concecpts. eg: resetting blocks, configuring clock phase etc.
I was thinking on similar lines for OMAP wherein I need to control 'hardware-auto-gating' bits on clocks which are otherwise just normal gates or dividers. We just disable all of them early at boot and re-enable them late in the boot process once PM kicks in. regards, Rajendra
quoted hunk ↗ jump to hunk
Signed-off-by: Peter De Schrijver<pdeschrijver@nvidia.com> --- drivers/clk/clk.c | 8 ++++++++ include/linux/clk-provider.h | 2 ++ include/linux/clk.h | 2 ++ 3 files changed, 12 insertions(+), 0 deletions(-)diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index e5d5dc1..39bc458 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c@@ -956,6 +956,14 @@ struct clk *clk_get_parent(struct clk *clk) } EXPORT_SYMBOL_GPL(clk_get_parent); +int clk_ext(struct clk *clk, unsigned int op, unsigned long param) +{ + if (clk->ops->ext) + return clk->ops->ext(clk->hw, op, param); + + return -EINVAL; +} + /* * .get_parent is mandatory for clocks with multiple possible parents. It is * optional for single-parent clocks. Always call .get_parent if it isdiff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index 6803fb4..08025d3 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h@@ -109,6 +109,8 @@ struct clk_ops { int (*set_rate)(struct clk_hw *hw, unsigned long, unsigned long); void (*init)(struct clk_hw *hw); + int (*ext)(struct clk_hw *hw, unsigned int op, + unsigned long param); }; /**diff --git a/include/linux/clk.h b/include/linux/clk.h index 0e078bd..74be656 100644 --- a/include/linux/clk.h +++ b/include/linux/clk.h@@ -278,4 +278,6 @@ struct clk *clk_get_sys(const char *dev_id, const char *con_id); int clk_add_alias(const char *alias, const char *alias_dev_name, char *id, struct device *dev); +int clk_ext(struct clk *clk, unsigned int op, unsigned long param); + #endif