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From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: barebox@lists.infradead.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Subject: [PATCH 06/20] clk: Port two helper functions from Linux
Date: Wed,  8 Mar 2017 14:08:55 -0800	[thread overview]
Message-ID: <20170308220909.4560-7-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <20170308220909.4560-1-andrew.smirnov@gmail.com>

Port of_clk_get_parent_count() and of_clk_parent_fill() from Linux.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 drivers/clk/clk.c   | 39 +++++++++++++++++++++++++++++++++++++++
 include/linux/clk.h |  3 +++
 2 files changed, 42 insertions(+)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 93e000c..9189521 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -452,6 +452,24 @@ struct clk *of_clk_get_from_provider(struct of_phandle_args *clkspec)
 	return clk;
 }
 
+/**
+ * of_clk_get_parent_count() - Count the number of clocks a device node has
+ * @np: device node to count
+ *
+ * Returns: The number of clocks that are possible parents of this node
+ */
+unsigned int of_clk_get_parent_count(struct device_node *np)
+{
+	int count;
+
+	count = of_count_phandle_with_args(np, "clocks", "#clock-cells");
+	if (count < 0)
+		return 0;
+
+	return count;
+}
+EXPORT_SYMBOL_GPL(of_clk_get_parent_count);
+
 char *of_clk_get_parent_name(struct device_node *np, unsigned int index)
 {
 	struct of_phandle_args clkspec;
@@ -472,6 +490,27 @@ char *of_clk_get_parent_name(struct device_node *np, unsigned int index)
 }
 EXPORT_SYMBOL_GPL(of_clk_get_parent_name);
 
+/**
+ * of_clk_parent_fill() - Fill @parents with names of @np's parents and return
+ * number of parents
+ * @np: Device node pointer associated with clock provider
+ * @parents: pointer to char array that hold the parents' names
+ * @size: size of the @parents array
+ *
+ * Return: number of parents for the clock node.
+ */
+int of_clk_parent_fill(struct device_node *np, const char **parents,
+		       unsigned int size)
+{
+	unsigned int i = 0;
+
+	while (i < size && (parents[i] = of_clk_get_parent_name(np, i)) != NULL)
+		i++;
+
+	return i;
+}
+EXPORT_SYMBOL_GPL(of_clk_parent_fill);
+
 struct clock_provider {
 	of_clk_init_cb_t clk_init_cb;
 	struct device_node *np;
diff --git a/include/linux/clk.h b/include/linux/clk.h
index 7dd5238..f73b029 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -348,7 +348,10 @@ struct clk *of_clk_src_simple_get(struct of_phandle_args *clkspec, void *data);
 struct clk *of_clk_get(struct device_node *np, int index);
 struct clk *of_clk_get_by_name(struct device_node *np, const char *name);
 struct clk *of_clk_get_from_provider(struct of_phandle_args *clkspec);
+unsigned int of_clk_get_parent_count(struct device_node *np);
 char *of_clk_get_parent_name(struct device_node *np, unsigned int index);
+int of_clk_parent_fill(struct device_node *np, const char **parents,
+		       unsigned int size);
 int of_clk_init(struct device_node *root, const struct of_device_id *matches);
 #else
 static inline struct clk *of_clk_get(struct device_node *np, int index)
-- 
2.9.3


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  parent reply	other threads:[~2017-03-08 22:09 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-08 22:08 [PATCH 00/20] AT91, at91sam9x5ek updates (part I/III) Andrey Smirnov
2017-03-08 22:08 ` [PATCH 01/20] at91: Fix bug/typo in debug_ll.h Andrey Smirnov
2017-03-08 22:08 ` [PATCH 02/20] regmap: Implement syscon_node_to_regmap() Andrey Smirnov
2017-03-08 22:08 ` [PATCH 03/20] pinctrl: at91: Fix a bug in at91_pinctrl_set_conf() Andrey Smirnov
2017-03-08 22:08 ` [PATCH 04/20] pinctrl: at91: Fix a bug in at91_pinctrl_set_state() Andrey Smirnov
2017-03-08 22:08 ` [PATCH 05/20] pinctrl: at91: Implement .get_direction hook Andrey Smirnov
2017-03-08 22:08 ` Andrey Smirnov [this message]
2017-03-08 22:08 ` [PATCH 07/20] clk: Make COMMON_CLK_OF_PROVIDER depend on OFTREE Andrey Smirnov
2017-03-08 22:08 ` [PATCH 08/20] clk: No-op CLK_OF_DECLARE if not enabled Andrey Smirnov
2017-03-09 10:54   ` Sascha Hauer
2017-03-08 22:08 ` [PATCH 09/20] of: base: Use scoring in DT device matching Andrey Smirnov
2017-03-08 22:08 ` [PATCH 10/20] serial: atmel: Check result of clk_get() Andrey Smirnov
2017-03-08 22:09 ` [PATCH 11/20] usb: ohci-at91: " Andrey Smirnov
2017-03-08 22:09 ` [PATCH 12/20] usb: ohci-at91: Convert global variables to private data Andrey Smirnov
2017-03-08 22:09 ` [PATCH 13/20] usb: ohci-at91: Check result of clk_enable() Andrey Smirnov
2017-03-08 22:09 ` [PATCH 14/20] usb: ehci-atmel: " Andrey Smirnov
2017-03-08 22:09 ` [PATCH 15/20] usb: echi-atmel: Convert global variables to private data Andrey Smirnov
2017-03-08 22:09 ` [PATCH 16/20] usb: ehci-atmel: Zero ehci_data before using it Andrey Smirnov
2017-03-08 22:09 ` [PATCH 17/20] usb: echi-atmel: Check result of ehci_register() Andrey Smirnov
2017-03-08 22:09 ` [PATCH 18/20] spi: atmel_spi: Configure CS GPIO as output Andrey Smirnov
2017-03-08 22:09 ` [PATCH 19/20] spi: atmel_spi: Use VERSION register instead of CPU type Andrey Smirnov
2017-03-08 22:09 ` [PATCH 20/20] clocksource: at91: Move to 'drivers/clocksource' Andrey Smirnov
2017-03-09  7:19 ` [PATCH 00/20] AT91, at91sam9x5ek updates (part I/III) Sascha Hauer

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