diff options
author | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2015-01-15 17:59:24 +0300 |
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committer | Nicolas Ferre <nicolas.ferre@atmel.com> | 2015-01-16 20:07:24 +0300 |
commit | f5598d346e36169f3eb4008c895300a39b100a0b (patch) | |
tree | 981190833d3f965d0cbcbc1376550168681aae39 /arch/arm/mach-at91/pm.c | |
parent | eca6f17253f33313eeb3020d0634a60d10f650c4 (diff) | |
download | linux-f5598d346e36169f3eb4008c895300a39b100a0b.tar.xz |
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>
Diffstat (limited to 'arch/arm/mach-at91/pm.c')
-rw-r--r-- | arch/arm/mach-at91/pm.c | 54 |
1 files changed, 33 insertions, 21 deletions
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c index 9b15169a1c62..79aa793d1f00 100644 --- a/arch/arm/mach-at91/pm.c +++ b/arch/arm/mach-at91/pm.c @@ -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); |