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Merge branch 'imx/fixes-for-3.5' of git://git.linaro.org/people/shawnguo/linux-2.6 into fixes 

* 'imx/fixes-for-3.5' of git://git.linaro.org/people/shawnguo/linux-2.6:
  ARM: imx6: exit coherency when shutting down a cpu
  ARM: mx51: Add pinctrl_provide_dummies()
  ARM: mx31: Add pinctrl_provide_dummies()

Signed-off-by: Olof Johansson <olof@lixom.net>
hifive-unleashed-5.1
Olof Johansson 2012-06-07 11:48:02 -07:00
parent 97114f3982 602bf40971
commit a5ffdb31a0
3 changed files with 45 additions and 1 deletions
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42
arch/arm/mach-imx/hotplug.c
View File

@ -12,6 +12,7 @@
#include <linux/errno.h>
#include <asm/cacheflush.h>
#include <asm/cp15.h>
#include <mach/common.h>
int platform_cpu_kill(unsigned int cpu)
@ -19,6 +20,44 @@ int platform_cpu_kill(unsigned int cpu)
return 1;
}
static inline void cpu_enter_lowpower(void)
{
unsigned int v;
flush_cache_all();
asm volatile(
"mcr p15, 0, %1, c7, c5, 0\n"
" mcr p15, 0, %1, c7, c10, 4\n"
/*
* Turn off coherency
*/
" mrc p15, 0, %0, c1, c0, 1\n"
" bic %0, %0, %3\n"
" mcr p15, 0, %0, c1, c0, 1\n"
" mrc p15, 0, %0, c1, c0, 0\n"
" bic %0, %0, %2\n"
" mcr p15, 0, %0, c1, c0, 0\n"
: "=&r" (v)
: "r" (0), "Ir" (CR_C), "Ir" (0x40)
: "cc");
}
static inline void cpu_leave_lowpower(void)
{
unsigned int v;
asm volatile(
"mrc p15, 0, %0, c1, c0, 0\n"
" orr %0, %0, %1\n"
" mcr p15, 0, %0, c1, c0, 0\n"
" mrc p15, 0, %0, c1, c0, 1\n"
" orr %0, %0, %2\n"
" mcr p15, 0, %0, c1, c0, 1\n"
: "=&r" (v)
: "Ir" (CR_C), "Ir" (0x40)
: "cc");
}
/*
* platform-specific code to shutdown a CPU
*
@ -26,9 +65,10 @@ int platform_cpu_kill(unsigned int cpu)
*/
void platform_cpu_die(unsigned int cpu)
{
flush_cache_all();
cpu_enter_lowpower();
imx_enable_cpu(cpu, false);
cpu_do_idle();
cpu_leave_lowpower();
/* We should never return from idle */
panic("cpu %d unexpectedly exit from shutdown\n", cpu);

2
arch/arm/mach-imx/mm-imx3.c
View File

@ -179,6 +179,8 @@ void __init imx31_soc_init(void)
mxc_register_gpio("imx31-gpio", 1, MX31_GPIO2_BASE_ADDR, SZ_16K, MX31_INT_GPIO2, 0);
mxc_register_gpio("imx31-gpio", 2, MX31_GPIO3_BASE_ADDR, SZ_16K, MX31_INT_GPIO3, 0);
pinctrl_provide_dummies();
if (to_version == 1) {
strncpy(imx31_sdma_pdata.fw_name, "sdma-imx31-to1.bin",
strlen(imx31_sdma_pdata.fw_name));

2
arch/arm/mach-imx/mm-imx5.c
View File

@ -202,6 +202,8 @@ void __init imx51_soc_init(void)
mxc_register_gpio("imx31-gpio", 2, MX51_GPIO3_BASE_ADDR, SZ_16K, MX51_INT_GPIO3_LOW, MX51_INT_GPIO3_HIGH);
mxc_register_gpio("imx31-gpio", 3, MX51_GPIO4_BASE_ADDR, SZ_16K, MX51_INT_GPIO4_LOW, MX51_INT_GPIO4_HIGH);
pinctrl_provide_dummies();
/* i.mx51 has the i.mx35 type sdma */
imx_add_imx_sdma("imx35-sdma", MX51_SDMA_BASE_ADDR, MX51_INT_SDMA, &imx51_sdma_pdata);