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authorAlexandre Belloni <alexandre.belloni@bootlin.com>2019-02-19 18:01:55 +0100
committerStephen Boyd <sboyd@kernel.org>2019-04-25 11:42:10 -0700
commit45b5ec8498ffc6bf860bfcc19478482d19fa6379 (patch)
treeeb8e9640d7954dc1f04e7bfcc9aafd053fa8c5ca /drivers/clk/at91
parentcc40f6404d28d1de4a09064aeff185a391c51c35 (diff)
downloadlinux-45b5ec8498ffc6bf860bfcc19478482d19fa6379.tar.bz2
clk: at91: modernize sckc binding
Remove the need for child nodes in the sckc binding and register the whole sckc tree (3 clocks in total) from the sckc node. DT backward compatibility is kept by looking for properties in child nodes when they are not present in the sckc node. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Diffstat (limited to 'drivers/clk/at91')
-rw-r--r--drivers/clk/at91/sckc.c125
1 files changed, 36 insertions, 89 deletions
diff --git a/drivers/clk/at91/sckc.c b/drivers/clk/at91/sckc.c
index ab6ecefc49ad..470aef586f57 100644
--- a/drivers/clk/at91/sckc.c
+++ b/drivers/clk/at91/sckc.c
@@ -152,28 +152,6 @@ at91_clk_register_slow_osc(void __iomem *sckcr,
return hw;
}
-static void __init
-of_at91sam9x5_clk_slow_osc_setup(struct device_node *np, void __iomem *sckcr)
-{
- struct clk_hw *hw;
- const char *parent_name;
- const char *name = np->name;
- u32 startup;
- bool bypass;
-
- parent_name = of_clk_get_parent_name(np, 0);
- of_property_read_string(np, "clock-output-names", &name);
- of_property_read_u32(np, "atmel,startup-time-usec", &startup);
- bypass = of_property_read_bool(np, "atmel,osc-bypass");
-
- hw = at91_clk_register_slow_osc(sckcr, name, parent_name, startup,
- bypass);
- if (IS_ERR(hw))
- return;
-
- of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw);
-}
-
static unsigned long clk_slow_rc_osc_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
@@ -266,28 +244,6 @@ at91_clk_register_slow_rc_osc(void __iomem *sckcr,
return hw;
}
-static void __init
-of_at91sam9x5_clk_slow_rc_osc_setup(struct device_node *np, void __iomem *sckcr)
-{
- struct clk_hw *hw;
- u32 frequency = 0;
- u32 accuracy = 0;
- u32 startup = 0;
- const char *name = np->name;
-
- of_property_read_string(np, "clock-output-names", &name);
- of_property_read_u32(np, "clock-frequency", &frequency);
- of_property_read_u32(np, "clock-accuracy", &accuracy);
- of_property_read_u32(np, "atmel,startup-time-usec", &startup);
-
- hw = at91_clk_register_slow_rc_osc(sckcr, name, frequency, accuracy,
- startup);
- if (IS_ERR(hw))
- return;
-
- of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw);
-}
-
static int clk_sam9x5_slow_set_parent(struct clk_hw *hw, u8 index)
{
struct clk_sam9x5_slow *slowck = to_clk_sam9x5_slow(hw);
@@ -365,64 +321,55 @@ at91_clk_register_sam9x5_slow(void __iomem *sckcr,
return hw;
}
-static void __init
-of_at91sam9x5_clk_slow_setup(struct device_node *np, void __iomem *sckcr)
+static void __init of_at91sam9x5_sckc_setup(struct device_node *np)
{
+ const char *parent_names[2] = { "slow_rc_osc", "slow_osc" };
+ void __iomem *regbase = of_iomap(np, 0);
+ struct device_node *child = NULL;
+ const char *xtal_name;
struct clk_hw *hw;
- const char *parent_names[2];
- unsigned int num_parents;
- const char *name = np->name;
+ bool bypass;
- num_parents = of_clk_get_parent_count(np);
- if (num_parents == 0 || num_parents > 2)
+ if (!regbase)
return;
- of_clk_parent_fill(np, parent_names, num_parents);
-
- of_property_read_string(np, "clock-output-names", &name);
-
- hw = at91_clk_register_sam9x5_slow(sckcr, name, parent_names,
- num_parents);
+ hw = at91_clk_register_slow_rc_osc(regbase, parent_names[0], 32768,
+ 50000000, 75);
if (IS_ERR(hw))
return;
- of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw);
-}
+ xtal_name = of_clk_get_parent_name(np, 0);
+ if (!xtal_name) {
+ /* DT backward compatibility */
+ child = of_get_compatible_child(np, "atmel,at91sam9x5-clk-slow-osc");
+ if (!child)
+ return;
+
+ xtal_name = of_clk_get_parent_name(child, 0);
+ bypass = of_property_read_bool(child, "atmel,osc-bypass");
+
+ child = of_get_compatible_child(np, "atmel,at91sam9x5-clk-slow");
+ } else {
+ bypass = of_property_read_bool(np, "atmel,osc-bypass");
+ }
-static const struct of_device_id sckc_clk_ids[] __initconst = {
- /* Slow clock */
- {
- .compatible = "atmel,at91sam9x5-clk-slow-osc",
- .data = of_at91sam9x5_clk_slow_osc_setup,
- },
- {
- .compatible = "atmel,at91sam9x5-clk-slow-rc-osc",
- .data = of_at91sam9x5_clk_slow_rc_osc_setup,
- },
- {
- .compatible = "atmel,at91sam9x5-clk-slow",
- .data = of_at91sam9x5_clk_slow_setup,
- },
- { /*sentinel*/ }
-};
+ if (!xtal_name)
+ return;
-static void __init of_at91sam9x5_sckc_setup(struct device_node *np)
-{
- struct device_node *childnp;
- void (*clk_setup)(struct device_node *, void __iomem *);
- const struct of_device_id *clk_id;
- void __iomem *regbase = of_iomap(np, 0);
+ hw = at91_clk_register_slow_osc(regbase, parent_names[1], xtal_name,
+ 1200000, bypass);
+ if (IS_ERR(hw))
+ return;
- if (!regbase)
+ hw = at91_clk_register_sam9x5_slow(regbase, "slowck", parent_names, 2);
+ if (IS_ERR(hw))
return;
- for_each_child_of_node(np, childnp) {
- clk_id = of_match_node(sckc_clk_ids, childnp);
- if (!clk_id)
- continue;
- clk_setup = clk_id->data;
- clk_setup(childnp, regbase);
- }
+ of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw);
+
+ /* DT backward compatibility */
+ if (child)
+ of_clk_add_hw_provider(child, of_clk_hw_simple_get, hw);
}
CLK_OF_DECLARE(at91sam9x5_clk_sckc, "atmel,at91sam9x5-sckc",
of_at91sam9x5_sckc_setup);