Commit 74be8427 authored Feb 22, 2010 by Paul Walmsley

OMAP clock: add omap_clk_get_by_name() for use by OMAP hwmod core code

The OMAP hwmod core code is intended to use SoC IP block description
structures that are autogenerated from TI's OMAP hardware database.
Currently the hwmod code uses clkdev device + connection addressing to
identify clocks. This causes problems in the hwmod autogeneration
process, since the TI hardware database doesn't use platform_device or
clkdev addressing; it uses a single clock signal name string, which
tends to bear some resemblance to what is used in the OMAP TRMs. This
patch adds a non-exported function to the OMAP clock code,
omap_clk_get_by_name(). A subsequent patch will convert the hwmod
code to use this function.

This function is for use only by core code, and practically, no other
code outside the hwmod code should need it. Device driver code in the
kernel must not use this function, which is why it is not exported.
Drivers should use the appropriate clock alias provided by the clkdev
data structures, so driver code can be completely SoC-independent.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoît Cousson <b-cousson@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>

parent e8d37377

arch/arm/plat-omap/clock.c

+27 −0

Original line number	Diff line number	Diff line
		@@ -313,6 +313,33 @@ void clk_enable_init_clocks(void)
		}
		}

		/**
		* omap_clk_get_by_name - locate OMAP struct clk by its name
		* @name: name of the struct clk to locate
		*
		* Locate an OMAP struct clk by its name. Assumes that struct clk
		* names are unique. Returns NULL if not found or a pointer to the
		* struct clk if found.
		*/
		struct clk omap_clk_get_by_name(const char name)
		{
		struct clk *c;
		struct clk *ret = NULL;

		mutex_lock(&clocks_mutex);

		list_for_each_entry(c, &clocks, node) {
		if (!strcmp(c->name, name)) {
		ret = c;
		break;
		}
		}

		mutex_unlock(&clocks_mutex);

		return ret;
		}

		/*
		* Low level helpers
		*/

arch/arm/plat-omap/include/plat/clock.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -182,6 +182,7 @@ unsigned long omap_fixed_divisor_recalc(struct clk *clk);
		extern void clk_init_cpufreq_table(struct cpufreq_frequency_table **table);
		extern void clk_exit_cpufreq_table(struct cpufreq_frequency_table **table);
		#endif
		extern struct clk omap_clk_get_by_name(const char name);

		extern const struct clkops clkops_null;

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