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ARM: imx: let L2 initialization be a common function 

Move imx6q L2 initialization function imx6q_init_l2cache() into
system.c, and rename it imx_init_l2cache(), so that other platforms
other than imx6q can also use the function.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Dirk Behme <dirk.behme@de.bosch.com>
This commit is contained in:
Shawn Guo 2013-07-08 21:45:20 +08:00
parent 8bba8303b0
commit e6a0756961
3 changed files with 40 additions and 36 deletions
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6
arch/arm/mach-imx/common.h
View File

@ -161,6 +161,12 @@ extern int mx51_neon_fixup(void);
static inline int mx51_neon_fixup(void) { return 0; }
#endif
#ifdef CONFIG_CACHE_L2X0
extern void imx_init_l2cache(void);
#else
static inline void imx_init_l2cache(void) {}
#endif
extern struct smp_operations imx_smp_ops;
#endif

37
arch/arm/mach-imx/mach-imx6q.c
View File

@ -32,7 +32,6 @@
#include <linux/micrel_phy.h>
#include <linux/mfd/syscon.h>
#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/system_misc.h>
@ -352,44 +351,10 @@ static void __init imx6q_map_io(void)
imx_scu_map_io();
}
#ifdef CONFIG_CACHE_L2X0
static void __init imx6q_init_l2cache(void)
{
void __iomem *l2x0_base;
struct device_node *np;
unsigned int val;
np = of_find_compatible_node(NULL, NULL, "arm,pl310-cache");
if (!np)
goto out;
l2x0_base = of_iomap(np, 0);
if (!l2x0_base) {
of_node_put(np);
goto out;
}
/* Configure the L2 PREFETCH and POWER registers */
val = readl_relaxed(l2x0_base + L2X0_PREFETCH_CTRL);
val |= 0x70800000;
writel_relaxed(val, l2x0_base + L2X0_PREFETCH_CTRL);
val = L2X0_DYNAMIC_CLK_GATING_EN | L2X0_STNDBY_MODE_EN;
writel_relaxed(val, l2x0_base + L2X0_POWER_CTRL);
iounmap(l2x0_base);
of_node_put(np);
out:
l2x0_of_init(0, ~0UL);
}
#else
static inline void imx6q_init_l2cache(void) {}
#endif
static void __init imx6q_init_irq(void)
{
imx6q_init_revision();
imx6q_init_l2cache();
imx_init_l2cache();
imx_src_init();
imx_gpc_init();
irqchip_init();

33
arch/arm/mach-imx/system.c
View File

@ -27,6 +27,7 @@
#include <asm/system_misc.h>
#include <asm/proc-fns.h>
#include <asm/mach-types.h>
#include <asm/hardware/cache-l2x0.h>
#include "common.h"
#include "hardware.h"
@ -95,3 +96,35 @@ void __init mxc_arch_reset_init_dt(void)
clk_prepare(wdog_clk);
}
#ifdef CONFIG_CACHE_L2X0
static void __init imx_init_l2cache(void)
{
void __iomem *l2x0_base;
struct device_node *np;
unsigned int val;
np = of_find_compatible_node(NULL, NULL, "arm,pl310-cache");
if (!np)
goto out;
l2x0_base = of_iomap(np, 0);
if (!l2x0_base) {
of_node_put(np);
goto out;
}
/* Configure the L2 PREFETCH and POWER registers */
val = readl_relaxed(l2x0_base + L2X0_PREFETCH_CTRL);
val |= 0x70800000;
writel_relaxed(val, l2x0_base + L2X0_PREFETCH_CTRL);
val = L2X0_DYNAMIC_CLK_GATING_EN | L2X0_STNDBY_MODE_EN;
writel_relaxed(val, l2x0_base + L2X0_POWER_CTRL);
iounmap(l2x0_base);
of_node_put(np);
out:
l2x0_of_init(0, ~0UL);
}
#endif