openwrt/target/linux/at91/patches-5.10/197-ARM-at91-pm-move-pm_bu-to-soc_pm-data-structure.patch

From e41d00bdaa31b36fd314e927104082615aa4643a Mon Sep 17 00:00:00 2001
From: Claudiu Beznea <claudiu.beznea@microchip.com>
Date: Thu, 15 Apr 2021 13:49:47 +0300
Subject: [PATCH 197/247] ARM: at91: pm: move pm_bu to soc_pm data structure

Move pm_bu to soc_pm data structure.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-2-claudiu.beznea@microchip.com
---
 arch/arm/mach-at91/pm.c | 34 +++++++++++++++++++++-------------
 1 file changed, 21 insertions(+), 13 deletions(-)

--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -27,10 +27,25 @@
 #include "generic.h"
 #include "pm.h"
 
+/**
+ * struct at91_pm_bu - AT91 power management backup unit data structure
+ * @suspended: true if suspended to backup mode
+ * @reserved: reserved
+ * @canary: canary data for memory checking after exit from backup mode
+ * @resume: resume API
+ */
+struct at91_pm_bu {
+	int suspended;
+	unsigned long reserved;
+	phys_addr_t canary;
+	phys_addr_t resume;
+};
+
 struct at91_soc_pm {
 	int (*config_shdwc_ws)(void __iomem *shdwc, u32 *mode, u32 *polarity);
 	int (*config_pmc_ws)(void __iomem *pmc, u32 mode, u32 polarity);
 	const struct of_device_id *ws_ids;
+	struct at91_pm_bu *bu;
 	struct at91_pm_data data;
 };
 
@@ -71,13 +86,6 @@ static int at91_pm_valid_state(suspend_s
 
 static int canary = 0xA5A5A5A5;
 
-static struct at91_pm_bu {
-	int suspended;
-	unsigned long reserved;
-	phys_addr_t canary;
-	phys_addr_t resume;
-} *pm_bu;
-
 struct wakeup_source_info {
 	unsigned int pmc_fsmr_bit;
 	unsigned int shdwc_mr_bit;
@@ -288,7 +296,7 @@ static int at91_suspend_finish(unsigned
 static void at91_pm_suspend(suspend_state_t state)
 {
 	if (soc_pm.data.mode == AT91_PM_BACKUP) {
-		pm_bu->suspended = 1;
+		soc_pm.bu->suspended = 1;
 
 		cpu_suspend(0, at91_suspend_finish);
 
@@ -672,16 +680,16 @@ static int __init at91_pm_backup_init(vo
 		goto securam_fail;
 	}
 
-	pm_bu = (void *)gen_pool_alloc(sram_pool, sizeof(struct at91_pm_bu));
-	if (!pm_bu) {
+	soc_pm.bu = (void *)gen_pool_alloc(sram_pool, sizeof(struct at91_pm_bu));
+	if (!soc_pm.bu) {
 		pr_warn("%s: unable to alloc securam!\n", __func__);
 		ret = -ENOMEM;
 		goto securam_fail;
 	}
 
-	pm_bu->suspended = 0;
-	pm_bu->canary = __pa_symbol(&canary);
-	pm_bu->resume = __pa_symbol(cpu_resume);
+	soc_pm.bu->suspended = 0;
+	soc_pm.bu->canary = __pa_symbol(&canary);
+	soc_pm.bu->resume = __pa_symbol(cpu_resume);
 
 	return 0;