xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ARM: imx: deconstruct mx3_idle

Browse Source 
The imx31 and imx35 idle functions are almost the same, but we
currently have to check the cpu type every time. This can be
simplified by moving the logic from mx3_cpu_lp_set() into
two separate idle functions, removing the last user of
cpu_is_mx35.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Arnd Bergmann
2016-06-24 12:49:58 +02:00
committed by Shawn Guo
parent c9ee94965d
commit c112d2adc3
3 changed files with 24 additions and 44 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
arch/arm/mach-imx/mm-imx3.c
View File

@@ -19,6 +19,7 @@
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/pinctrl/machine.h>
#include <asm/pgtable.h>
@@ -38,8 +39,6 @@ static void imx3_idle(void)
{
unsigned long reg = 0;
mx3_cpu_lp_set(MX3_WAIT);
__asm__ __volatile__(
/* disable I and D cache */
"mrc p15, 0, %0, c1, c0, 0\n"
@@ -135,11 +134,20 @@ void __init mx31_map_io(void)
iotable_init(mx31_io_desc, ARRAY_SIZE(mx31_io_desc));
}
static void imx31_idle(void)
{
int reg = imx_readl(mx3_ccm_base + MXC_CCM_CCMR);
reg &= ~MXC_CCM_CCMR_LPM_MASK;
imx_writel(reg, mx3_ccm_base + MXC_CCM_CCMR);
imx3_idle();
}
void __init imx31_init_early(void)
{
mxc_set_cpu_type(MXC_CPU_MX31);
arch_ioremap_caller = imx3_ioremap_caller;
arm_pm_idle = imx3_idle;
arm_pm_idle = imx31_idle;
mx3_ccm_base = MX31_IO_ADDRESS(MX31_CCM_BASE_ADDR);
}
@@ -218,11 +226,21 @@ void __init mx35_map_io(void)
iotable_init(mx35_io_desc, ARRAY_SIZE(mx35_io_desc));
}
static void imx35_idle(void)
{
int reg = imx_readl(mx3_ccm_base + MXC_CCM_CCMR);
reg &= ~MXC_CCM_CCMR_LPM_MASK;
reg |= MXC_CCM_CCMR_LPM_WAIT_MX35;
imx_writel(reg, mx3_ccm_base + MXC_CCM_CCMR);
imx3_idle();
}
void __init imx35_init_early(void)
{
mxc_set_cpu_type(MXC_CPU_MX35);
mxc_iomux_v3_init(MX35_IO_ADDRESS(MX35_IOMUXC_BASE_ADDR));
arm_pm_idle = imx3_idle;
arm_pm_idle = imx35_idle;
arch_ioremap_caller = imx3_ioremap_caller;
mx3_ccm_base = MX35_IO_ADDRESS(MX35_CCM_BASE_ADDR);
}