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Commit e1482a17 authored by Arnd Bergmann's avatar Arnd Bergmann
Browse files

Merge branch 'mxs/clk-prepare' of git://git.linaro.org/people/shawnguo/linux-2.6 into imx/clk

parents 5f0a6e2d 6abda3e1

arch/arm/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -442,6 +442,7 @@ config ARCH_MXS 
	select ARCH_REQUIRE_GPIOLIB

	select CLKDEV_LOOKUP

	select CLKSRC_MMIO

	select HAVE_CLK_PREPARE

	help

	  Support for Freescale MXS-based family of processors

arch/arm/mach-mxs/clock-mx23.c

+5 −5
Original line number Diff line number Diff line
@@ -545,11 +545,11 @@ int __init mx23_clocks_init(void) 
	 */

	clk_set_parent(&ssp_clk, &ref_io_clk);



	clk_enable(&cpu_clk);

	clk_enable(&hbus_clk);

	clk_enable(&xbus_clk);

	clk_enable(&emi_clk);

	clk_enable(&uart_clk);

	clk_prepare_enable(&cpu_clk);

	clk_prepare_enable(&hbus_clk);

	clk_prepare_enable(&xbus_clk);

	clk_prepare_enable(&emi_clk);

	clk_prepare_enable(&uart_clk);



	clkdev_add_table(lookups, ARRAY_SIZE(lookups));

arch/arm/mach-mxs/clock-mx28.c

+5 −5
Original line number Diff line number Diff line
@@ -775,11 +775,11 @@ int __init mx28_clocks_init(void) 
	clk_set_parent(&ssp0_clk, &ref_io0_clk);

	clk_set_parent(&ssp1_clk, &ref_io0_clk);



	clk_enable(&cpu_clk);

	clk_enable(&hbus_clk);

	clk_enable(&xbus_clk);

	clk_enable(&emi_clk);

	clk_enable(&uart_clk);

	clk_prepare_enable(&cpu_clk);

	clk_prepare_enable(&hbus_clk);

	clk_prepare_enable(&xbus_clk);

	clk_prepare_enable(&emi_clk);

	clk_prepare_enable(&uart_clk);



	clk_set_parent(&lcdif_clk, &ref_pix_clk);

	clk_set_parent(&saif0_clk, &pll0_clk);

arch/arm/mach-mxs/clock.c

+23 −10
Original line number Diff line number Diff line
@@ -74,10 +74,15 @@ static int __clk_enable(struct clk *clk) 
	return 0;

}



/* This function increments the reference count on the clock and enables the

 * clock if not already enabled. The parent clock tree is recursively enabled

/*

 * The clk_enable/clk_disable could be called by drivers in atomic context,

 * so they should not really hold mutex.  Instead, clk_prepare/clk_unprepare

 * can hold a mutex, as the pair will only be called in non-atomic context.

 * Before migrating to common clk framework, we can have __clk_enable and

 * __clk_disable called in clk_prepare/clk_unprepare with mutex held and

 * leave clk_enable/clk_disable as the dummy functions.

 */

int clk_enable(struct clk *clk)

int clk_prepare(struct clk *clk)

{

	int ret = 0;
@@ -90,13 +95,9 @@ int clk_enable(struct clk *clk) 


	return ret;

}

EXPORT_SYMBOL(clk_enable);

EXPORT_SYMBOL(clk_prepare);



/* This function decrements the reference count on the clock and disables

 * the clock when reference count is 0. The parent clock tree is

 * recursively disabled

 */

void clk_disable(struct clk *clk)

void clk_unprepare(struct clk *clk)

{

	if (clk == NULL || IS_ERR(clk))

		return;
@@ -105,6 +106,18 @@ void clk_disable(struct clk *clk) 
	__clk_disable(clk);

	mutex_unlock(&clocks_mutex);

}

EXPORT_SYMBOL(clk_unprepare);



int clk_enable(struct clk *clk)

{

	return 0;

}

EXPORT_SYMBOL(clk_enable);



void clk_disable(struct clk *clk)

{

	/* nothing to do */

}

EXPORT_SYMBOL(clk_disable);



/* Retrieve the *current* clock rate. If the clock itself
@@ -166,7 +179,7 @@ int clk_set_parent(struct clk *clk, struct clk *parent) 
		return ret;



	if (clk->usecount)

		clk_enable(parent);

		clk_prepare_enable(parent);



	mutex_lock(&clocks_mutex);

	ret = clk->set_parent(clk, parent);

arch/arm/mach-mxs/mach-mx28evk.c

+1 −1
Original line number Diff line number Diff line
@@ -228,7 +228,7 @@ static void __init mx28evk_fec_reset(void) 
	/* Enable fec phy clock */

	clk = clk_get_sys("pll2", NULL);

	if (!IS_ERR(clk))

		clk_enable(clk);

		clk_prepare_enable(clk);



	/* Power up fec phy */

	ret = gpio_request(MX28EVK_FEC_PHY_POWER, "fec-phy-power");