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Commit 9919d44f authored by Stephen Boyd's avatar Stephen Boyd
Browse files

clk: sunxi: Use CLK_IS_CRITICAL flag for critical clks 



We'd like to privatize __clk_get(), but the sunxi clk driver is
calling this function to keep a reference held on the clk and
call clk_prepare_enable() on it. We support this design in the
clk core now with the CLK_IS_CRITICAL flag, so let's just use
that instead.

Acked-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: default avatarChen-Yu Tsai <wens@csie.org>
Signed-off-by: default avatarStephen Boyd <sboyd@codeaurora.org>
parent e0af0c16

drivers/clk/sunxi/clk-factors.c

+21 −5
Original line number Diff line number Diff line
@@ -176,10 +176,10 @@ static const struct clk_ops clk_factors_ops = { 
	.set_rate = clk_factors_set_rate,

};



struct clk *sunxi_factors_register(struct device_node *node,

static struct clk *__sunxi_factors_register(struct device_node *node,

					    const struct factors_data *data,

				   spinlock_t *lock,

				   void __iomem *reg)

					    spinlock_t *lock, void __iomem *reg,

					    unsigned long flags)

{

	struct clk *clk;

	struct clk_factors *factors;
@@ -249,7 +249,7 @@ struct clk *sunxi_factors_register(struct device_node *node, 
			parents, i,

			mux_hw, &clk_mux_ops,

			&factors->hw, &clk_factors_ops,

			gate_hw, &clk_gate_ops, 0);

			gate_hw, &clk_gate_ops, CLK_IS_CRITICAL);

	if (IS_ERR(clk))

		goto err_register;
@@ -272,6 +272,22 @@ struct clk *sunxi_factors_register(struct device_node *node, 
	return NULL;

}



struct clk *sunxi_factors_register(struct device_node *node,

				   const struct factors_data *data,

				   spinlock_t *lock,

				   void __iomem *reg)

{

	return __sunxi_factors_register(node, data, lock, reg, 0);

}



struct clk *sunxi_factors_register_critical(struct device_node *node,

					    const struct factors_data *data,

					    spinlock_t *lock,

					    void __iomem *reg)

{

	return __sunxi_factors_register(node, data, lock, reg, CLK_IS_CRITICAL);

}



void sunxi_factors_unregister(struct device_node *node, struct clk *clk)

{

	struct clk_hw *hw = __clk_get_hw(clk);

drivers/clk/sunxi/clk-factors.h

+4 −0
Original line number Diff line number Diff line
@@ -55,6 +55,10 @@ struct clk *sunxi_factors_register(struct device_node *node, 
				   const struct factors_data *data,

				   spinlock_t *lock,

				   void __iomem *reg);

struct clk *sunxi_factors_register_critical(struct device_node *node,

					    const struct factors_data *data,

					    spinlock_t *lock,

					    void __iomem *reg);



void sunxi_factors_unregister(struct device_node *node, struct clk *clk);

drivers/clk/sunxi/clk-mod0.c

+2 −7
Original line number Diff line number Diff line
@@ -15,7 +15,6 @@ 
 */



#include <linux/clk.h>

#include <linux/clkdev.h>

#include <linux/clk-provider.h>

#include <linux/of_address.h>

#include <linux/platform_device.h>
@@ -155,7 +154,6 @@ static DEFINE_SPINLOCK(sun5i_a13_mbus_lock); 


static void __init sun5i_a13_mbus_setup(struct device_node *node)

{

	struct clk *mbus;

	void __iomem *reg;



	reg = of_iomap(node, 0);
@@ -164,12 +162,9 @@ static void __init sun5i_a13_mbus_setup(struct device_node *node) 
		return;

	}



	mbus = sunxi_factors_register(node, &sun4i_a10_mod0_data,

				      &sun5i_a13_mbus_lock, reg);



	/* The MBUS clocks needs to be always enabled */

	__clk_get(mbus);

	clk_prepare_enable(mbus);

	sunxi_factors_register_critical(node, &sun4i_a10_mod0_data,

					&sun5i_a13_mbus_lock, reg);

}

CLK_OF_DECLARE(sun5i_a13_mbus, "allwinner,sun5i-a13-mbus-clk", sun5i_a13_mbus_setup);

drivers/clk/sunxi/clk-sun8i-mbus.c

+2 −5
Original line number Diff line number Diff line
@@ -15,7 +15,6 @@ 
 */



#include <linux/clk.h>

#include <linux/clkdev.h>

#include <linux/clk-provider.h>

#include <linux/slab.h>

#include <linux/spinlock.h>
@@ -82,11 +81,12 @@ static void __init sun8i_a23_mbus_setup(struct device_node *node) 
	mux->mask = SUN8I_MBUS_MUX_MASK;

	mux->lock = &sun8i_a23_mbus_lock;



	/* The MBUS clocks needs to be always enabled */

	clk = clk_register_composite(NULL, clk_name, parents, num_parents,

				     &mux->hw, &clk_mux_ops,

				     &div->hw, &clk_divider_ops,

				     &gate->hw, &clk_gate_ops,

				     0);

				     CLK_IS_CRITICAL);

	if (IS_ERR(clk))

		goto err_free_gate;
@@ -95,9 +95,6 @@ static void __init sun8i_a23_mbus_setup(struct device_node *node) 
		goto err_unregister_clk;



	kfree(parents); /* parents is deep copied */

	/* The MBUS clocks needs to be always enabled */

	__clk_get(clk);

	clk_prepare_enable(clk);



	return;

drivers/clk/sunxi/clk-sun9i-core.c

+2 −7
Original line number Diff line number Diff line
@@ -15,7 +15,6 @@ 
 */



#include <linux/clk.h>

#include <linux/clkdev.h>

#include <linux/clk-provider.h>

#include <linux/of.h>

#include <linux/of_address.h>
@@ -140,7 +139,6 @@ static DEFINE_SPINLOCK(sun9i_a80_gt_lock); 
static void __init sun9i_a80_gt_setup(struct device_node *node)

{

	void __iomem *reg;

	struct clk *gt;



	reg = of_io_request_and_map(node, 0, of_node_full_name(node));

	if (IS_ERR(reg)) {
@@ -149,12 +147,9 @@ static void __init sun9i_a80_gt_setup(struct device_node *node) 
		return;

	}



	gt = sunxi_factors_register(node, &sun9i_a80_gt_data,

				    &sun9i_a80_gt_lock, reg);



	/* The GT bus clock needs to be always enabled */

	__clk_get(gt);

	clk_prepare_enable(gt);

	sunxi_factors_register_critical(node, &sun9i_a80_gt_data,

					&sun9i_a80_gt_lock, reg);

}

CLK_OF_DECLARE(sun9i_a80_gt, "allwinner,sun9i-a80-gt-clk", sun9i_a80_gt_setup);