Commit f5598d34 authored by Alexandre Belloni's avatar Alexandre Belloni Committed by Nicolas Ferre
Browse files

ARM: at91: pm: rework cpu detection 



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

Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: default avatarNicolas Ferre <nicolas.ferre@atmel.com>
parent eca6f172

arch/arm/mach-at91/pm.c

+33 −21
Original line number Diff line number Diff line
@@ -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)
@@ -71,18 +77,10 @@ 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) {

	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 */

	for (i = 0; i < 4; i++) {
@@ -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);