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author | Stephen Boyd <sboyd@kernel.org> | 2019-04-12 11:31:50 -0700 |
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committer | Stephen Boyd <sboyd@kernel.org> | 2019-04-19 14:53:20 -0700 |
commit | ecbf3f1795fda56122632c1d024cfd0d3f4fe353 (patch) | |
tree | fcad8ebe1423ed658a71ef30e80f70d93dcbd157 | |
parent | 601b6e93304a65f8f7c37168763ab9ba5b195ce5 (diff) | |
download | linux-stable-ecbf3f1795fda56122632c1d024cfd0d3f4fe353.tar.gz linux-stable-ecbf3f1795fda56122632c1d024cfd0d3f4fe353.tar.bz2 linux-stable-ecbf3f1795fda56122632c1d024cfd0d3f4fe353.zip |
clk: fixed-factor: Let clk framework find parent
Convert this driver to a more modern way of specifying parents now that
we have a way to specify clk parents by DT index. This lets us nicely
avoid a problem where a parent clk name isn't know because the parent
clk hasn't been registered yet.
Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Jeffrey Hugo <jhugo@codeaurora.org>
Cc: Chen-Yu Tsai <wens@csie.org>
Tested-by: Jeffrey Hugo <jhugo@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
-rw-r--r-- | drivers/clk/clk-fixed-factor.c | 53 |
1 files changed, 33 insertions, 20 deletions
diff --git a/drivers/clk/clk-fixed-factor.c b/drivers/clk/clk-fixed-factor.c index 241b3f8c61a9..5b09f2cdb7de 100644 --- a/drivers/clk/clk-fixed-factor.c +++ b/drivers/clk/clk-fixed-factor.c @@ -64,12 +64,14 @@ const struct clk_ops clk_fixed_factor_ops = { }; EXPORT_SYMBOL_GPL(clk_fixed_factor_ops); -struct clk_hw *clk_hw_register_fixed_factor(struct device *dev, - const char *name, const char *parent_name, unsigned long flags, - unsigned int mult, unsigned int div) +static struct clk_hw * +__clk_hw_register_fixed_factor(struct device *dev, struct device_node *np, + const char *name, const char *parent_name, int index, + unsigned long flags, unsigned int mult, unsigned int div) { struct clk_fixed_factor *fix; struct clk_init_data init; + struct clk_parent_data pdata = { .index = index }; struct clk_hw *hw; int ret; @@ -85,11 +87,17 @@ struct clk_hw *clk_hw_register_fixed_factor(struct device *dev, init.name = name; init.ops = &clk_fixed_factor_ops; init.flags = flags | CLK_IS_BASIC; - init.parent_names = &parent_name; + if (parent_name) + init.parent_names = &parent_name; + else + init.parent_data = &pdata; init.num_parents = 1; hw = &fix->hw; - ret = clk_hw_register(dev, hw); + if (dev) + ret = clk_hw_register(dev, hw); + else + ret = of_clk_hw_register(np, hw); if (ret) { kfree(fix); hw = ERR_PTR(ret); @@ -97,6 +105,14 @@ struct clk_hw *clk_hw_register_fixed_factor(struct device *dev, return hw; } + +struct clk_hw *clk_hw_register_fixed_factor(struct device *dev, + const char *name, const char *parent_name, unsigned long flags, + unsigned int mult, unsigned int div) +{ + return __clk_hw_register_fixed_factor(dev, NULL, name, parent_name, -1, + flags, mult, div); +} EXPORT_SYMBOL_GPL(clk_hw_register_fixed_factor); struct clk *clk_register_fixed_factor(struct device *dev, const char *name, @@ -143,11 +159,10 @@ static const struct of_device_id set_rate_parent_matches[] = { { /* Sentinel */ }, }; -static struct clk *_of_fixed_factor_clk_setup(struct device_node *node) +static struct clk_hw *_of_fixed_factor_clk_setup(struct device_node *node) { - struct clk *clk; + struct clk_hw *hw; const char *clk_name = node->name; - const char *parent_name; unsigned long flags = 0; u32 div, mult; int ret; @@ -165,30 +180,28 @@ static struct clk *_of_fixed_factor_clk_setup(struct device_node *node) } of_property_read_string(node, "clock-output-names", &clk_name); - parent_name = of_clk_get_parent_name(node, 0); if (of_match_node(set_rate_parent_matches, node)) flags |= CLK_SET_RATE_PARENT; - clk = clk_register_fixed_factor(NULL, clk_name, parent_name, flags, - mult, div); - if (IS_ERR(clk)) { + hw = __clk_hw_register_fixed_factor(NULL, node, clk_name, NULL, 0, + flags, mult, div); + if (IS_ERR(hw)) { /* - * If parent clock is not registered, registration would fail. * Clear OF_POPULATED flag so that clock registration can be * attempted again from probe function. */ of_node_clear_flag(node, OF_POPULATED); - return clk; + return ERR_CAST(hw); } - ret = of_clk_add_provider(node, of_clk_src_simple_get, clk); + ret = of_clk_add_hw_provider(node, of_clk_hw_simple_get, hw); if (ret) { - clk_unregister(clk); + clk_hw_unregister_fixed_factor(hw); return ERR_PTR(ret); } - return clk; + return hw; } /** @@ -203,17 +216,17 @@ CLK_OF_DECLARE(fixed_factor_clk, "fixed-factor-clock", static int of_fixed_factor_clk_remove(struct platform_device *pdev) { - struct clk *clk = platform_get_drvdata(pdev); + struct clk_hw *clk = platform_get_drvdata(pdev); of_clk_del_provider(pdev->dev.of_node); - clk_unregister_fixed_factor(clk); + clk_hw_unregister_fixed_factor(clk); return 0; } static int of_fixed_factor_clk_probe(struct platform_device *pdev) { - struct clk *clk; + struct clk_hw *clk; /* * This function is not executed when of_fixed_factor_clk_setup |