openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

ARM: at91: pm: rework cpu detection 

Store SoC differences in a struct to remove cpu_is_* usage.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
This commit is contained in:
Alexandre Belloni 2015-01-15 15:59:24 +01:00 committed by Nicolas Ferre
parent eca6f17253
commit f5598d346e
1 changed files with 33 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
arch/arm/mach-at91/pm.c
View File

@ -17,6 +17,7 @@
#include <linux/interrupt.h>
#include <linux/sysfs.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/clk/at91_pmc.h>
@ -32,6 +33,11 @@
#include "generic.h"
#include "pm.h"
static struct {
unsigned long uhp_udp_mask;
int memctrl;
} at91_pm_data;
static void (*at91_pm_standby)(void);
static int at91_pm_valid_state(suspend_state_t state)
@ -71,17 +77,9 @@ static int at91_pm_verify_clocks(void)
scsr = at91_pmc_read(AT91_PMC_SCSR);
/* USB must not be using PLLB */
if (cpu_is_at91rm9200()) {
if ((scsr & (AT91RM9200_PMC_UHP | AT91RM9200_PMC_UDP)) != 0) {
pr_err("AT91: PM - Suspend-to-RAM with USB still active\n");
return 0;
}
} else if (cpu_is_at91sam9260() || cpu_is_at91sam9261() || cpu_is_at91sam9263()
|| cpu_is_at91sam9g20() || cpu_is_at91sam9g10()) {
if ((scsr & (AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP)) != 0) {
pr_err("AT91: PM - Suspend-to-RAM with USB still active\n");
return 0;
}
if ((scsr & at91_pm_data.uhp_udp_mask) != 0) {
pr_err("AT91: PM - Suspend-to-RAM with USB still active\n");
return 0;
}
/* PCK0..PCK3 must be disabled, or configured to use clk32k */
@ -149,18 +147,13 @@ static int at91_pm_enter(suspend_state_t state)
* turning off the main oscillator; reverse on wakeup.
*/
if (slow_clock) {
int memctrl = AT91_MEMCTRL_SDRAMC;
if (cpu_is_at91rm9200())
memctrl = AT91_MEMCTRL_MC;
else if (cpu_is_at91sam9g45())
memctrl = AT91_MEMCTRL_DDRSDR;
#ifdef CONFIG_AT91_SLOW_CLOCK
/* copy slow_clock handler to SRAM, and call it */
memcpy(slow_clock, at91_slow_clock, at91_slow_clock_sz);
#endif
slow_clock(at91_pmc_base, at91_ramc_base[0],
at91_ramc_base[1], memctrl);
at91_ramc_base[1],
at91_pm_data.memctrl);
break;
} else {
pr_info("AT91: PM - no slow clock mode enabled ...\n");
@ -237,10 +230,29 @@ static int __init at91_pm_init(void)
pr_info("AT91: Power Management%s\n", (slow_clock ? " (with slow clock mode)" : ""));
/* AT91RM9200 SDRAM low-power mode cannot be used with self-refresh. */
if (cpu_is_at91rm9200())
at91_pm_data.memctrl = AT91_MEMCTRL_SDRAMC;
if (of_machine_is_compatible("atmel,at91rm9200")) {
/*
* AT91RM9200 SDRAM low-power mode cannot be used with
* self-refresh.
*/
at91_ramc_write(0, AT91RM9200_SDRAMC_LPR, 0);
at91_pm_data.uhp_udp_mask = AT91RM9200_PMC_UHP |
AT91RM9200_PMC_UDP;
at91_pm_data.memctrl = AT91_MEMCTRL_MC;
} else if (of_machine_is_compatible("atmel,at91sam9260") ||
of_machine_is_compatible("atmel,at91sam9g20") ||
of_machine_is_compatible("atmel,at91sam9261") ||
of_machine_is_compatible("atmel,at91sam9g10") ||
of_machine_is_compatible("atmel,at91sam9263")) {
at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP |
AT91SAM926x_PMC_UDP;
} else if (of_machine_is_compatible("atmel,at91sam9g45")) {
at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
}
if (at91_cpuidle_device.dev.platform_data)
platform_device_register(&at91_cpuidle_device);