diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-23 23:44:43 +0300 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-23 23:44:43 +0300 |
commit | 9e259f9352d52053058a234f7c062c4e4f56dc85 (patch) | |
tree | bfb1c442e27f95ddb9a04bae2a44ca9e3dd69a85 /arch/arm/mach-omap2 | |
parent | 5563ae9b39c5ba492be1b18f2d72fd43ba549915 (diff) | |
parent | f0fc40aff6fee100ffbed8328a0df88f8aa75fce (diff) | |
download | linux-9e259f9352d52053058a234f7c062c4e4f56dc85.tar.xz |
Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM 32-bit SoC platform updates from Olof Johansson:
"Most of the SoC updates in this cycle are cleanups and moves to more
modern infrastructure:
- Davinci was moved to common clock framework
- OMAP1-based Amstrad E3 "Superphone" saw a bunch of cleanups to the
keyboard interface (bitbanged AT keyboard via GPIO).
- Removal of some stale code for Renesas platforms
- Power management improvements for i.MX6LL"
* tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (112 commits)
ARM: uniphier: select RESET_CONTROLLER
arm64: uniphier: select RESET_CONTROLLER
ARM: uniphier: remove empty Makefile
ARM: exynos: Clear global variable on init error path
ARM: exynos: Remove outdated maintainer information
ARM: shmobile: Always enable ARCH_TIMER on SoCs with A7 and/or A15
ARM: shmobile: r8a7779: hide unused r8a7779_platform_cpu_kill
soc: r9a06g032: don't build SMP files for non-SMP config
ARM: shmobile: Add the R9A06G032 SMP enabler driver
ARM: at91: pm: configure wakeup sources for ULP1 mode
ARM: at91: pm: add PMC fast startup registers defines
ARM: at91: pm: Add ULP1 mode support
ARM: at91: pm: Use ULP0 naming instead of slow clock
ARM: hisi: handle of_iomap and fix missing of_node_put
ARM: hisi: check of_iomap and fix missing of_node_put
ARM: hisi: fix error handling and missing of_node_put
ARM: mx5: Set the DBGEN bit in ARM_GPC register
ARM: imx51: Configure M4IF to avoid visual artifacts
ARM: imx: call imx6sx_cpuidle_init() conditionally for 6sll
ARM: imx: fix i.MX6SLL build
...
Diffstat (limited to 'arch/arm/mach-omap2')
-rw-r--r-- | arch/arm/mach-omap2/omap_hwmod_reset.c | 12 | ||||
-rw-r--r-- | arch/arm/mach-omap2/pm-asm-offsets.c | 2 | ||||
-rw-r--r-- | arch/arm/mach-omap2/pm-debug.c | 37 | ||||
-rw-r--r-- | arch/arm/mach-omap2/pm33xx-core.c | 20 | ||||
-rw-r--r-- | arch/arm/mach-omap2/sleep33xx.S | 52 | ||||
-rw-r--r-- | arch/arm/mach-omap2/sleep43xx.S | 110 |
6 files changed, 186 insertions, 47 deletions
diff --git a/arch/arm/mach-omap2/omap_hwmod_reset.c b/arch/arm/mach-omap2/omap_hwmod_reset.c index b68f9c0aff0b..d5ddba00bb73 100644 --- a/arch/arm/mach-omap2/omap_hwmod_reset.c +++ b/arch/arm/mach-omap2/omap_hwmod_reset.c @@ -92,11 +92,13 @@ static void omap_rtc_wait_not_busy(struct omap_hwmod *oh) */ void omap_hwmod_rtc_unlock(struct omap_hwmod *oh) { - local_irq_disable(); + unsigned long flags; + + local_irq_save(flags); omap_rtc_wait_not_busy(oh); omap_hwmod_write(OMAP_RTC_KICK0_VALUE, oh, OMAP_RTC_KICK0_REG); omap_hwmod_write(OMAP_RTC_KICK1_VALUE, oh, OMAP_RTC_KICK1_REG); - local_irq_enable(); + local_irq_restore(flags); } /** @@ -110,9 +112,11 @@ void omap_hwmod_rtc_unlock(struct omap_hwmod *oh) */ void omap_hwmod_rtc_lock(struct omap_hwmod *oh) { - local_irq_disable(); + unsigned long flags; + + local_irq_save(flags); omap_rtc_wait_not_busy(oh); omap_hwmod_write(0x0, oh, OMAP_RTC_KICK0_REG); omap_hwmod_write(0x0, oh, OMAP_RTC_KICK1_REG); - local_irq_enable(); + local_irq_restore(flags); } diff --git a/arch/arm/mach-omap2/pm-asm-offsets.c b/arch/arm/mach-omap2/pm-asm-offsets.c index b9846b19e5e2..d8ae8a85b14b 100644 --- a/arch/arm/mach-omap2/pm-asm-offsets.c +++ b/arch/arm/mach-omap2/pm-asm-offsets.c @@ -27,6 +27,8 @@ int main(void) offsetof(struct am33xx_pm_ro_sram_data, amx3_pm_sram_data_virt)); DEFINE(AMX3_PM_RO_SRAM_DATA_PHYS_OFFSET, offsetof(struct am33xx_pm_ro_sram_data, amx3_pm_sram_data_phys)); + DEFINE(AMX3_PM_RTC_BASE_VIRT_OFFSET, + offsetof(struct am33xx_pm_ro_sram_data, rtc_base_virt)); DEFINE(AMX3_PM_RO_SRAM_DATA_SIZE, sizeof(struct am33xx_pm_ro_sram_data)); diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c index acb698d5780f..5a8839203958 100644 --- a/arch/arm/mach-omap2/pm-debug.c +++ b/arch/arm/mach-omap2/pm-debug.c @@ -47,11 +47,6 @@ static int pm_dbg_init_done; static int pm_dbg_init(void); -enum { - DEBUG_FILE_COUNTERS = 0, - DEBUG_FILE_TIMERS, -}; - static const char pwrdm_state_names[][PWRDM_MAX_PWRSTS] = { "OFF", "RET", @@ -141,39 +136,21 @@ static int pwrdm_dbg_show_timer(struct powerdomain *pwrdm, void *user) return 0; } -static int pm_dbg_show_counters(struct seq_file *s, void *unused) +static int pm_dbg_counters_show(struct seq_file *s, void *unused) { pwrdm_for_each(pwrdm_dbg_show_counter, s); clkdm_for_each(clkdm_dbg_show_counter, s); return 0; } +DEFINE_SHOW_ATTRIBUTE(pm_dbg_counters); -static int pm_dbg_show_timers(struct seq_file *s, void *unused) +static int pm_dbg_timers_show(struct seq_file *s, void *unused) { pwrdm_for_each(pwrdm_dbg_show_timer, s); return 0; } - -static int pm_dbg_open(struct inode *inode, struct file *file) -{ - switch ((int)inode->i_private) { - case DEBUG_FILE_COUNTERS: - return single_open(file, pm_dbg_show_counters, - &inode->i_private); - case DEBUG_FILE_TIMERS: - default: - return single_open(file, pm_dbg_show_timers, - &inode->i_private); - } -} - -static const struct file_operations debug_fops = { - .open = pm_dbg_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; +DEFINE_SHOW_ATTRIBUTE(pm_dbg_timers); static int pwrdm_suspend_get(void *data, u64 *val) { @@ -259,10 +236,8 @@ static int __init pm_dbg_init(void) if (!d) return -EINVAL; - (void) debugfs_create_file("count", S_IRUGO, - d, (void *)DEBUG_FILE_COUNTERS, &debug_fops); - (void) debugfs_create_file("time", S_IRUGO, - d, (void *)DEBUG_FILE_TIMERS, &debug_fops); + (void) debugfs_create_file("count", 0444, d, NULL, &pm_dbg_counters_fops); + (void) debugfs_create_file("time", 0444, d, NULL, &pm_dbg_timers_fops); pwrdm_for_each(pwrdms_setup, (void *)d); diff --git a/arch/arm/mach-omap2/pm33xx-core.c b/arch/arm/mach-omap2/pm33xx-core.c index 9b3755a2e2ec..f4971e4a86b2 100644 --- a/arch/arm/mach-omap2/pm33xx-core.c +++ b/arch/arm/mach-omap2/pm33xx-core.c @@ -26,6 +26,7 @@ static struct powerdomain *cefuse_pwrdm, *gfx_pwrdm, *per_pwrdm, *mpu_pwrdm; static struct clockdomain *gfx_l4ls_clkdm; static void __iomem *scu_base; +static struct omap_hwmod *rtc_oh; static int __init am43xx_map_scu(void) { @@ -106,12 +107,13 @@ static void amx3_post_suspend_common(void) pr_err("PM: GFX domain did not transition: %x\n", status); } -static int am33xx_suspend(unsigned int state, int (*fn)(unsigned long)) +static int am33xx_suspend(unsigned int state, int (*fn)(unsigned long), + unsigned long args) { int ret = 0; amx3_pre_suspend_common(); - ret = cpu_suspend(0, fn); + ret = cpu_suspend(args, fn); amx3_post_suspend_common(); /* @@ -128,13 +130,14 @@ static int am33xx_suspend(unsigned int state, int (*fn)(unsigned long)) return ret; } -static int am43xx_suspend(unsigned int state, int (*fn)(unsigned long)) +static int am43xx_suspend(unsigned int state, int (*fn)(unsigned long), + unsigned long args) { int ret = 0; amx3_pre_suspend_common(); scu_power_mode(scu_base, SCU_PM_POWEROFF); - ret = cpu_suspend(0, fn); + ret = cpu_suspend(args, fn); scu_power_mode(scu_base, SCU_PM_NORMAL); amx3_post_suspend_common(); @@ -151,16 +154,25 @@ static struct am33xx_pm_sram_addr *amx3_get_sram_addrs(void) return NULL; } +void __iomem *am43xx_get_rtc_base_addr(void) +{ + rtc_oh = omap_hwmod_lookup("rtc"); + + return omap_hwmod_get_mpu_rt_va(rtc_oh); +} + static struct am33xx_pm_platform_data am33xx_ops = { .init = am33xx_suspend_init, .soc_suspend = am33xx_suspend, .get_sram_addrs = amx3_get_sram_addrs, + .get_rtc_base_addr = am43xx_get_rtc_base_addr, }; static struct am33xx_pm_platform_data am43xx_ops = { .init = am43xx_suspend_init, .soc_suspend = am43xx_suspend, .get_sram_addrs = amx3_get_sram_addrs, + .get_rtc_base_addr = am43xx_get_rtc_base_addr, }; static struct am33xx_pm_platform_data *am33xx_pm_get_pdata(void) diff --git a/arch/arm/mach-omap2/sleep33xx.S b/arch/arm/mach-omap2/sleep33xx.S index 322b3bb868b4..47a816468cdb 100644 --- a/arch/arm/mach-omap2/sleep33xx.S +++ b/arch/arm/mach-omap2/sleep33xx.S @@ -8,6 +8,7 @@ #include <generated/ti-pm-asm-offsets.h> #include <linux/linkage.h> +#include <linux/platform_data/pm33xx.h> #include <linux/ti-emif-sram.h> #include <asm/assembler.h> #include <asm/memory.h> @@ -19,12 +20,25 @@ #define AM33XX_CM_CLKCTRL_MODULEMODE_DISABLE 0x0003 #define AM33XX_CM_CLKCTRL_MODULEMODE_ENABLE 0x0002 +/* replicated define because linux/bitops.h cannot be included in assembly */ +#define BIT(nr) (1 << (nr)) + .arm .align 3 ENTRY(am33xx_do_wfi) stmfd sp!, {r4 - r11, lr} @ save registers on stack + /* Save wfi_flags arg to data space */ + mov r4, r0 + adr r3, am33xx_pm_ro_sram_data + ldr r2, [r3, #AMX3_PM_RO_SRAM_DATA_VIRT_OFFSET] + str r4, [r2, #AMX3_PM_WFI_FLAGS_OFFSET] + + /* Only flush cache is we know we are losing MPU context */ + tst r4, #WFI_FLAG_FLUSH_CACHE + beq cache_skip_flush + /* * Flush all data from the L1 and L2 data cache before disabling * SCTLR.C bit. @@ -48,14 +62,33 @@ ENTRY(am33xx_do_wfi) ldr r1, kernel_flush blx r1 + adr r3, am33xx_pm_ro_sram_data + ldr r2, [r3, #AMX3_PM_RO_SRAM_DATA_VIRT_OFFSET] + ldr r4, [r2, #AMX3_PM_WFI_FLAGS_OFFSET] + +cache_skip_flush: + /* Check if we want self refresh */ + tst r4, #WFI_FLAG_SELF_REFRESH + beq emif_skip_enter_sr + adr r9, am33xx_emif_sram_table ldr r3, [r9, #EMIF_PM_ENTER_SR_OFFSET] blx r3 +emif_skip_enter_sr: + /* Only necessary if PER is losing context */ + tst r4, #WFI_FLAG_SAVE_EMIF + beq emif_skip_save + ldr r3, [r9, #EMIF_PM_SAVE_CONTEXT_OFFSET] blx r3 +emif_skip_save: + /* Only can disable EMIF if we have entered self refresh */ + tst r4, #WFI_FLAG_SELF_REFRESH + beq emif_skip_disable + /* Disable EMIF */ ldr r1, virt_emif_clkctrl ldr r2, [r1] @@ -69,6 +102,10 @@ wait_emif_disable: cmp r2, r3 bne wait_emif_disable +emif_skip_disable: + tst r4, #WFI_FLAG_WAKE_M3 + beq wkup_m3_skip + /* * For the MPU WFI to be registered as an interrupt * to WKUP_M3, MPU_CLKCTRL.MODULEMODE needs to be set @@ -79,6 +116,7 @@ wait_emif_disable: bic r2, r2, #AM33XX_CM_CLKCTRL_MODULEMODE_DISABLE str r2, [r1] +wkup_m3_skip: /* * Execute an ISB instruction to ensure that all of the * CP15 register changes have been committed. @@ -132,10 +170,18 @@ wait_emif_enable: cmp r2, r3 bne wait_emif_enable + /* Only necessary if PER is losing context */ + tst r4, #WFI_FLAG_SELF_REFRESH + beq emif_skip_exit_sr_abt + adr r9, am33xx_emif_sram_table ldr r1, [r9, #EMIF_PM_ABORT_SR_OFFSET] blx r1 +emif_skip_exit_sr_abt: + tst r4, #WFI_FLAG_FLUSH_CACHE + beq cache_skip_restore + /* * Set SCTLR.C bit to allow data cache allocation */ @@ -144,6 +190,7 @@ wait_emif_enable: mcr p15, 0, r0, c1, c0, 0 isb +cache_skip_restore: /* Let the suspend code know about the abort */ mov r0, #1 ldmfd sp!, {r4 - r11, pc} @ restore regs and return @@ -181,8 +228,6 @@ ENDPROC(am33xx_resume_from_deep_sleep) * Local variables */ .align -resume_addr: - .word cpu_resume - PAGE_OFFSET + 0x80000000 kernel_flush: .word v7_flush_dcache_all virt_mpu_clkctrl: @@ -205,6 +250,9 @@ ENTRY(am33xx_pm_sram) .word am33xx_emif_sram_table .word am33xx_pm_ro_sram_data +resume_addr: +.word cpu_resume - PAGE_OFFSET + 0x80000000 + .align 3 ENTRY(am33xx_pm_ro_sram_data) .space AMX3_PM_RO_SRAM_DATA_SIZE diff --git a/arch/arm/mach-omap2/sleep43xx.S b/arch/arm/mach-omap2/sleep43xx.S index 8903814a6677..5b9343b58fc7 100644 --- a/arch/arm/mach-omap2/sleep43xx.S +++ b/arch/arm/mach-omap2/sleep43xx.S @@ -9,7 +9,7 @@ #include <generated/ti-pm-asm-offsets.h> #include <linux/linkage.h> #include <linux/ti-emif-sram.h> - +#include <linux/platform_data/pm33xx.h> #include <asm/assembler.h> #include <asm/hardware/cache-l2x0.h> #include <asm/memory.h> @@ -22,6 +22,9 @@ #include "prm33xx.h" #include "prcm43xx.h" +/* replicated define because linux/bitops.h cannot be included in assembly */ +#define BIT(nr) (1 << (nr)) + #define AM33XX_CM_CLKCTRL_MODULESTATE_DISABLED 0x00030000 #define AM33XX_CM_CLKCTRL_MODULEMODE_DISABLE 0x0003 #define AM33XX_CM_CLKCTRL_MODULEMODE_ENABLE 0x0002 @@ -45,12 +48,25 @@ AM43XX_CM_PER_EMIF_CLKCTRL_OFFSET) #define AM43XX_PRM_EMIF_CTRL_OFFSET 0x0030 +#define RTC_SECONDS_REG 0x0 +#define RTC_PMIC_REG 0x98 +#define RTC_PMIC_POWER_EN BIT(16) +#define RTC_PMIC_EXT_WAKEUP_STS BIT(12) +#define RTC_PMIC_EXT_WAKEUP_POL BIT(4) +#define RTC_PMIC_EXT_WAKEUP_EN BIT(0) + .arm .align 3 ENTRY(am43xx_do_wfi) stmfd sp!, {r4 - r11, lr} @ save registers on stack + /* Save wfi_flags arg to data space */ + mov r4, r0 + adr r3, am43xx_pm_ro_sram_data + ldr r2, [r3, #AMX3_PM_RO_SRAM_DATA_VIRT_OFFSET] + str r4, [r2, #AMX3_PM_WFI_FLAGS_OFFSET] + #ifdef CONFIG_CACHE_L2X0 /* Retrieve l2 cache virt address BEFORE we shut off EMIF */ ldr r1, get_l2cache_base @@ -58,6 +74,10 @@ ENTRY(am43xx_do_wfi) mov r8, r0 #endif + /* Only flush cache is we know we are losing MPU context */ + tst r4, #WFI_FLAG_FLUSH_CACHE + beq cache_skip_flush + /* * Flush all data from the L1 and L2 data cache before disabling * SCTLR.C bit. @@ -128,13 +148,47 @@ sync: bne sync #endif + /* Restore wfi_flags */ + adr r3, am43xx_pm_ro_sram_data + ldr r2, [r3, #AMX3_PM_RO_SRAM_DATA_VIRT_OFFSET] + ldr r4, [r2, #AMX3_PM_WFI_FLAGS_OFFSET] + +cache_skip_flush: + /* + * If we are trying to enter RTC+DDR mode we must perform + * a read from the rtc address space to ensure translation + * presence in the TLB to avoid page table walk after DDR + * is unavailable. + */ + tst r4, #WFI_FLAG_RTC_ONLY + beq skip_rtc_va_refresh + + adr r3, am43xx_pm_ro_sram_data + ldr r1, [r3, #AMX3_PM_RTC_BASE_VIRT_OFFSET] + ldr r0, [r1] + +skip_rtc_va_refresh: + /* Check if we want self refresh */ + tst r4, #WFI_FLAG_SELF_REFRESH + beq emif_skip_enter_sr + adr r9, am43xx_emif_sram_table ldr r3, [r9, #EMIF_PM_ENTER_SR_OFFSET] blx r3 +emif_skip_enter_sr: + /* Only necessary if PER is losing context */ + tst r4, #WFI_FLAG_SAVE_EMIF + beq emif_skip_save + ldr r3, [r9, #EMIF_PM_SAVE_CONTEXT_OFFSET] - blx r3 + blx r3 + +emif_skip_save: + /* Only can disable EMIF if we have entered self refresh */ + tst r4, #WFI_FLAG_SELF_REFRESH + beq emif_skip_disable /* Disable EMIF */ ldr r1, am43xx_virt_emif_clkctrl @@ -148,6 +202,38 @@ wait_emif_disable: cmp r2, r3 bne wait_emif_disable +emif_skip_disable: + tst r4, #WFI_FLAG_RTC_ONLY + beq skip_rtc_only + + adr r3, am43xx_pm_ro_sram_data + ldr r1, [r3, #AMX3_PM_RTC_BASE_VIRT_OFFSET] + + ldr r0, [r1, #RTC_PMIC_REG] + orr r0, r0, #RTC_PMIC_POWER_EN + orr r0, r0, #RTC_PMIC_EXT_WAKEUP_STS + orr r0, r0, #RTC_PMIC_EXT_WAKEUP_EN + orr r0, r0, #RTC_PMIC_EXT_WAKEUP_POL + str r0, [r1, #RTC_PMIC_REG] + ldr r0, [r1, #RTC_PMIC_REG] + /* Wait for 2 seconds to lose power */ + mov r3, #2 + ldr r2, [r1, #RTC_SECONDS_REG] +rtc_loop: + ldr r0, [r1, #RTC_SECONDS_REG] + cmp r0, r2 + beq rtc_loop + mov r2, r0 + subs r3, r3, #1 + bne rtc_loop + + b re_enable_emif + +skip_rtc_only: + + tst r4, #WFI_FLAG_WAKE_M3 + beq wkup_m3_skip + /* * For the MPU WFI to be registered as an interrupt * to WKUP_M3, MPU_CLKCTRL.MODULEMODE needs to be set @@ -165,6 +251,7 @@ wait_emif_disable: mov r2, #AM43XX_CM_CLKSTCTRL_CLKTRCTRL_SW_SLEEP str r2, [r1] +wkup_m3_skip: /* * Execute a barrier instruction to ensure that all cache, * TLB and branch predictor maintenance operations issued @@ -209,6 +296,7 @@ wait_emif_disable: mov r2, #AM33XX_CM_CLKCTRL_MODULEMODE_ENABLE str r2, [r1] +re_enable_emif: /* Re-enable EMIF */ ldr r1, am43xx_virt_emif_clkctrl mov r2, #AM33XX_CM_CLKCTRL_MODULEMODE_ENABLE @@ -218,6 +306,9 @@ wait_emif_enable: cmp r2, r3 bne wait_emif_enable + tst r4, #WFI_FLAG_FLUSH_CACHE + beq cache_skip_restore + /* * Set SCTLR.C bit to allow data cache allocation */ @@ -226,9 +317,16 @@ wait_emif_enable: mcr p15, 0, r0, c1, c0, 0 isb - ldr r1, [r9, #EMIF_PM_ABORT_SR_OFFSET] - blx r1 +cache_skip_restore: + /* Only necessary if PER is losing context */ + tst r4, #WFI_FLAG_SELF_REFRESH + beq emif_skip_exit_sr_abt + + adr r9, am43xx_emif_sram_table + ldr r1, [r9, #EMIF_PM_ABORT_SR_OFFSET] + blx r1 +emif_skip_exit_sr_abt: /* Let the suspend code know about the abort */ mov r0, #1 ldmfd sp!, {r4 - r11, pc} @ restore regs and return @@ -333,8 +431,6 @@ ENDPROC(am43xx_resume_from_deep_sleep) * Local variables */ .align -resume_addr: - .word cpu_resume - PAGE_OFFSET + 0x80000000 kernel_flush: .word v7_flush_dcache_all ddr_start: @@ -381,6 +477,8 @@ ENTRY(am43xx_pm_sram) .word am43xx_emif_sram_table .word am43xx_pm_ro_sram_data +resume_addr: + .word cpu_resume - PAGE_OFFSET + 0x80000000 .align 3 ENTRY(am43xx_pm_ro_sram_data) |