From mboxrd@z Thu Jan 1 00:00:00 1970 From: sboyd@codeaurora.org (Stephen Boyd) Date: Wed, 16 Oct 2013 00:40:05 -0700 Subject: [PATCH v3 03/12] clk: Allow drivers to pass in a regmap In-Reply-To: <1381909214-12693-1-git-send-email-sboyd@codeaurora.org> References: <1381909214-12693-1-git-send-email-sboyd@codeaurora.org> Message-ID: <1381909214-12693-4-git-send-email-sboyd@codeaurora.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Add support to the clock core so that drivers can pass in a regmap. If no regmap is specified try to query the device that's registering the clock for its regmap. This should allow drivers to use the core regmap helpers. Signed-off-by: Stephen Boyd --- drivers/clk/clk.c | 8 ++++++++ include/linux/clk-provider.h | 7 +++++++ 2 files changed, 15 insertions(+) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index fbb5d59..8042c00 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -20,6 +20,7 @@ #include #include #include +#include static DEFINE_SPINLOCK(enable_lock); static DEFINE_MUTEX(prepare_lock); @@ -1828,6 +1829,13 @@ static int _clk_register(struct device *dev, struct clk_hw *hw, struct clk *clk) clk->num_parents = hw->init->num_parents; hw->clk = clk; + if (hw->init->regmap) + hw->regmap = hw->init->regmap; + else if (dev && dev_get_regmap(dev, NULL)) + hw->regmap = dev_get_regmap(dev, NULL); + else if (dev->parent) + hw->regmap = dev_get_regmap(dev->parent, NULL); + /* allocate local copy in case parent_names is __initdata */ clk->parent_names = kzalloc((sizeof(char*) * clk->num_parents), GFP_KERNEL); diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index 73bdb69..6ed62f1 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -142,6 +142,8 @@ struct clk_ops { void (*init)(struct clk_hw *hw); }; +struct regmap; + /** * struct clk_init_data - holds init data that's common to all clocks and is * shared between the clock provider and the common clock framework. @@ -151,6 +153,7 @@ struct clk_ops { * @parent_names: array of string names for all possible parents * @num_parents: number of possible parents * @flags: framework-level hints and quirks + * @regmap: regmap to use for regmap helpers and/or by providers */ struct clk_init_data { const char *name; @@ -158,6 +161,7 @@ struct clk_init_data { const char **parent_names; u8 num_parents; unsigned long flags; + struct regmap *regmap; }; /** @@ -171,10 +175,13 @@ struct clk_init_data { * * @init: pointer to struct clk_init_data that contains the init data shared * with the common clock framework. + * + * @regmap: regmap to use for regmap helpers and/or by providers */ struct clk_hw { struct clk *clk; const struct clk_init_data *init; + struct regmap *regmap; }; /* -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation