diff options
Diffstat (limited to 'target/linux/at91/patches-5.10/228-ARM-at91-pm-switch-backup-area-to-vbat-in-backup-mod.patch')
| -rw-r--r-- | target/linux/at91/patches-5.10/228-ARM-at91-pm-switch-backup-area-to-vbat-in-backup-mod.patch | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/target/linux/at91/patches-5.10/228-ARM-at91-pm-switch-backup-area-to-vbat-in-backup-mod.patch b/target/linux/at91/patches-5.10/228-ARM-at91-pm-switch-backup-area-to-vbat-in-backup-mod.patch deleted file mode 100644 index 02532b4722..0000000000 --- a/target/linux/at91/patches-5.10/228-ARM-at91-pm-switch-backup-area-to-vbat-in-backup-mod.patch +++ /dev/null @@ -1,117 +0,0 @@ -From 2cd84ddf0e9623c6bc723b1df368cd8b16a3a8e2 Mon Sep 17 00:00:00 2001 -From: Claudiu Beznea <claudiu.beznea@microchip.com> -Date: Mon, 30 Aug 2021 13:09:27 +0300 -Subject: [PATCH 228/247] ARM: at91: pm: switch backup area to vbat in backup - mode - -Backup area is now switched to VDDIN33 at boot (with the help of -bootloader). When switching to backup mode we need to switch backup area -to VBAT as all the other power sources are cut off. The resuming from -backup mode is done with the help of bootloader, so there is no need to -do something particular in Linux to restore backup area power source. - -Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> -Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> -Link: https://lore.kernel.org/r/20210830100927.22711-1-claudiu.beznea@microchip.com ---- - arch/arm/mach-at91/pm.c | 52 +++++++++++++++++++++++++++++++++++++++++ - 1 file changed, 52 insertions(+) - ---- a/arch/arm/mach-at91/pm.c -+++ b/arch/arm/mach-at91/pm.c -@@ -47,12 +47,26 @@ struct at91_pm_bu { - unsigned long ddr_phy_calibration[BACKUP_DDR_PHY_CALIBRATION]; - }; - -+/* -+ * struct at91_pm_sfrbu_offsets: registers mapping for SFRBU -+ * @pswbu: power switch BU control registers -+ */ -+struct at91_pm_sfrbu_regs { -+ struct { -+ u32 key; -+ u32 ctrl; -+ u32 state; -+ u32 softsw; -+ } pswbu; -+}; -+ - /** - * struct at91_soc_pm - AT91 SoC power management data structure - * @config_shdwc_ws: wakeup sources configuration function for SHDWC - * @config_pmc_ws: wakeup srouces configuration function for PMC - * @ws_ids: wakup sources of_device_id array - * @data: PM data to be used on last phase of suspend -+ * @sfrbu_regs: SFRBU registers mapping - * @bu: backup unit mapped data (for backup mode) - * @memcs: memory chip select - */ -@@ -62,6 +76,7 @@ struct at91_soc_pm { - const struct of_device_id *ws_ids; - struct at91_pm_bu *bu; - struct at91_pm_data data; -+ struct at91_pm_sfrbu_regs sfrbu_regs; - void *memcs; - }; - -@@ -356,9 +371,36 @@ static int at91_suspend_finish(unsigned - return 0; - } - -+static void at91_pm_switch_ba_to_vbat(void) -+{ -+ unsigned int offset = offsetof(struct at91_pm_sfrbu_regs, pswbu); -+ unsigned int val; -+ -+ /* Just for safety. */ -+ if (!soc_pm.data.sfrbu) -+ return; -+ -+ val = readl(soc_pm.data.sfrbu + offset); -+ -+ /* Already on VBAT. */ -+ if (!(val & soc_pm.sfrbu_regs.pswbu.state)) -+ return; -+ -+ val &= ~soc_pm.sfrbu_regs.pswbu.softsw; -+ val |= soc_pm.sfrbu_regs.pswbu.key | soc_pm.sfrbu_regs.pswbu.ctrl; -+ writel(val, soc_pm.data.sfrbu + offset); -+ -+ /* Wait for update. */ -+ val = readl(soc_pm.data.sfrbu + offset); -+ while (val & soc_pm.sfrbu_regs.pswbu.state) -+ val = readl(soc_pm.data.sfrbu + offset); -+} -+ - static void at91_pm_suspend(suspend_state_t state) - { - if (soc_pm.data.mode == AT91_PM_BACKUP) { -+ at91_pm_switch_ba_to_vbat(); -+ - cpu_suspend(0, at91_suspend_finish); - - /* The SRAM is lost between suspend cycles */ -@@ -1155,6 +1197,11 @@ void __init sama5d2_pm_init(void) - soc_pm.ws_ids = sama5d2_ws_ids; - soc_pm.config_shdwc_ws = at91_sama5d2_config_shdwc_ws; - soc_pm.config_pmc_ws = at91_sama5d2_config_pmc_ws; -+ -+ soc_pm.sfrbu_regs.pswbu.key = (0x4BD20C << 8); -+ soc_pm.sfrbu_regs.pswbu.ctrl = BIT(0); -+ soc_pm.sfrbu_regs.pswbu.softsw = BIT(1); -+ soc_pm.sfrbu_regs.pswbu.state = BIT(3); - } - - void __init sama7_pm_init(void) -@@ -1185,6 +1232,11 @@ void __init sama7_pm_init(void) - - soc_pm.ws_ids = sama7g5_ws_ids; - soc_pm.config_pmc_ws = at91_sam9x60_config_pmc_ws; -+ -+ soc_pm.sfrbu_regs.pswbu.key = (0x4BD20C << 8); -+ soc_pm.sfrbu_regs.pswbu.ctrl = BIT(0); -+ soc_pm.sfrbu_regs.pswbu.softsw = BIT(1); -+ soc_pm.sfrbu_regs.pswbu.state = BIT(2); - } - - static int __init at91_pm_modes_select(char *str) |