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clk: mvebu: share locks between gate clocks 

Refactor mvebu_clk_gating_setup() to use a common spinlock instead of a
unique lock for every instance of a struct clk_gating_ctrl object. This
will be used later for a separate mux clock type that shares a register
with gate clock types and needs to use the same lock to protect access
to the register.

Cc: Andrew Lunn <andrew@lunn.ch>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
Mike Turquette 2014-08-27 15:36:37 -07:00
parent 69e273c0b0
commit 87e392164a
2 changed files with 8 additions and 3 deletions
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9
drivers/clk/mvebu/common.c
View File

@ -89,8 +89,10 @@ void __init mvebu_coreclk_setup(struct device_node *np,
* Clock Gating Control
*/
DEFINE_SPINLOCK(ctrl_gating_lock);
struct clk_gating_ctrl {
spinlock_t lock;
spinlock_t *lock;
struct clk **gates;
int num_gates;
};
@ -138,7 +140,8 @@ void __init mvebu_clk_gating_setup(struct device_node *np,
if (WARN_ON(!ctrl))
goto ctrl_out;
spin_lock_init(&ctrl->lock);
/* lock must already be initialized */
ctrl->lock = &ctrl_gating_lock;
/* Count, allocate, and register clock gates */
for (n = 0; desc[n].name;)
@ -155,7 +158,7 @@ void __init mvebu_clk_gating_setup(struct device_node *np,
(desc[n].parent) ? desc[n].parent : default_parent;
ctrl->gates[n] = clk_register_gate(NULL, desc[n].name, parent,
desc[n].flags, base, desc[n].bit_idx,
0, &ctrl->lock);
0, ctrl->lock);
WARN_ON(IS_ERR(ctrl->gates[n]));
}

2
drivers/clk/mvebu/common.h
View File

@ -17,6 +17,8 @@
#include <linux/kernel.h>
extern spinlock_t ctrl_gating_lock;
struct device_node;
struct coreclk_ratio {