* [PATCH 0/3] AT91 PM improvements
@ 2020-08-03 7:25 Claudiu Beznea
2020-08-03 7:25 ` [PATCH 1/3] ARM: at91: pm: add support for ulp0 fast mode Claudiu Beznea
` (2 more replies)
0 siblings, 3 replies; 7+ messages in thread
From: Claudiu Beznea @ 2020-08-03 7:25 UTC (permalink / raw)
To: nicolas.ferre, alexandre.belloni, ludovic.desroches
Cc: linux-arm-kernel, linux-kernel, Claudiu Beznea
Hi,
This series adds ULP0 fast mode intended to reduce the suspend/resume
time in the detriment of power consumption (patch 1/3).
Along with this patch 2/3 adds code to avoid requesting a PM mode
not available on platforms not supporting it.
Patch 3/3 decrements a device_node refcount after its usage.
Thank you,
Claudiu Beznea
Claudiu Beznea (3):
ARM: at91: pm: add support for ulp0 fast mode
ARM: at91: pm: add per soc validation of pm modes
ARM: at91: pm: put node after its usage
arch/arm/mach-at91/at91rm9200.c | 10 +++++-
arch/arm/mach-at91/at91sam9.c | 9 ++++-
arch/arm/mach-at91/generic.h | 20 +++++------
arch/arm/mach-at91/pm.c | 79 +++++++++++++++++++++++++++++++++++------
arch/arm/mach-at91/pm.h | 5 +--
arch/arm/mach-at91/pm_suspend.S | 41 ++++++++++++++++++---
arch/arm/mach-at91/sam9x60.c | 11 +++++-
arch/arm/mach-at91/sama5.c | 21 +++++++++--
8 files changed, 165 insertions(+), 31 deletions(-)
--
2.7.4
^ permalink raw reply [flat|nested] 7+ messages in thread* [PATCH 1/3] ARM: at91: pm: add support for ulp0 fast mode 2020-08-03 7:25 [PATCH 0/3] AT91 PM improvements Claudiu Beznea @ 2020-08-03 7:25 ` Claudiu Beznea 2020-08-03 7:25 ` [PATCH 2/3] ARM: at91: pm: add per soc validation of pm modes Claudiu Beznea 2020-08-03 7:25 ` [PATCH 3/3] ARM: at91: pm: put node after its usage Claudiu Beznea 2 siblings, 0 replies; 7+ messages in thread From: Claudiu Beznea @ 2020-08-03 7:25 UTC (permalink / raw) To: nicolas.ferre, alexandre.belloni, ludovic.desroches Cc: linux-arm-kernel, linux-kernel, Claudiu Beznea ULP0 fast improves suspend/resume time with few milliseconds the drawback being the power consumption. The mean values measured for suspend/resume time are as follows (measured on SAMA5D2 Xplained board), ULP0 compared with ULP0 fast: - ulp0 fast: suspend time: 169 ms, resume time: 216 ms - ulp0 : suspend time: 197 ms, resume time: 258 ms Current consumption while suspended (measured on SAMA5D2 Xplained board): - ulp0 fast: 730uA - ulp0 : 270uA Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> --- arch/arm/mach-at91/pm.c | 9 +++++---- arch/arm/mach-at91/pm.h | 5 +++-- arch/arm/mach-at91/pm_suspend.S | 41 +++++++++++++++++++++++++++++++++++++---- 3 files changed, 45 insertions(+), 10 deletions(-) diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c index 074bde64064e..04fdcbd57100 100644 --- a/arch/arm/mach-at91/pm.c +++ b/arch/arm/mach-at91/pm.c @@ -51,10 +51,11 @@ static struct at91_soc_pm soc_pm = { }; static const match_table_t pm_modes __initconst = { - { AT91_PM_STANDBY, "standby" }, - { AT91_PM_ULP0, "ulp0" }, - { AT91_PM_ULP1, "ulp1" }, - { AT91_PM_BACKUP, "backup" }, + { AT91_PM_STANDBY, "standby" }, + { AT91_PM_ULP0, "ulp0" }, + { AT91_PM_ULP0_FAST, "ulp0-fast" }, + { AT91_PM_ULP1, "ulp1" }, + { AT91_PM_BACKUP, "backup" }, { -1, NULL }, }; diff --git a/arch/arm/mach-at91/pm.h b/arch/arm/mach-at91/pm.h index 218e8d1a30fb..bfb260be371e 100644 --- a/arch/arm/mach-at91/pm.h +++ b/arch/arm/mach-at91/pm.h @@ -19,8 +19,9 @@ #define AT91_PM_STANDBY 0x00 #define AT91_PM_ULP0 0x01 -#define AT91_PM_ULP1 0x02 -#define AT91_PM_BACKUP 0x03 +#define AT91_PM_ULP0_FAST 0x02 +#define AT91_PM_ULP1 0x03 +#define AT91_PM_BACKUP 0x04 #ifndef __ASSEMBLY__ struct at91_pm_data { diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S index be9764e8d3fa..0184de05c1be 100644 --- a/arch/arm/mach-at91/pm_suspend.S +++ b/arch/arm/mach-at91/pm_suspend.S @@ -164,7 +164,22 @@ ENDPROC(at91_backup_mode) .macro at91_pm_ulp0_mode ldr pmc, .pmc_base + ldr tmp2, .pm_mode + ldr tmp3, .mckr_offset + + /* Check if ULP0 fast variant has been requested. */ + cmp tmp2, #AT91_PM_ULP0_FAST + bne 0f + + /* Set highest prescaler for power saving */ + ldr tmp1, [pmc, tmp3] + bic tmp1, tmp1, #AT91_PMC_PRES + orr tmp1, tmp1, #AT91_PMC_PRES_64 + str tmp1, [pmc, tmp3] + wait_mckrdy + b 1f +0: /* Turn off the crystal oscillator */ ldr tmp1, [pmc, #AT91_CKGR_MOR] bic tmp1, tmp1, #AT91_PMC_MOSCEN @@ -192,7 +207,18 @@ ENDPROC(at91_backup_mode) /* Wait for interrupt */ 1: at91_cpu_idle - /* Restore RC oscillator state */ + /* Check if ULP0 fast variant has been requested. */ + cmp tmp2, #AT91_PM_ULP0_FAST + bne 5f + + /* Set lowest prescaler for fast resume. */ + ldr tmp1, [pmc, tmp3] + bic tmp1, tmp1, #AT91_PMC_PRES + str tmp1, [pmc, tmp3] + wait_mckrdy + b 6f + +5: /* Restore RC oscillator state */ ldr tmp1, .saved_osc_status tst tmp1, #AT91_PMC_MOSCRCS beq 4f @@ -216,6 +242,7 @@ ENDPROC(at91_backup_mode) str tmp1, [pmc, #AT91_CKGR_MOR] wait_moscrdy +6: .endm /** @@ -473,23 +500,29 @@ ENDPROC(at91_backup_mode) ENTRY(at91_ulp_mode) ldr pmc, .pmc_base ldr tmp2, .mckr_offset + ldr tmp3, .pm_mode /* Save Master clock setting */ ldr tmp1, [pmc, tmp2] str tmp1, .saved_mckr /* - * Set the Master clock source to slow clock + * Set master clock source to: + * - MAINCK if using ULP0 fast variant + * - slow clock, otherwise */ bic tmp1, tmp1, #AT91_PMC_CSS + cmp tmp3, #AT91_PM_ULP0_FAST + bne save_mck + orr tmp1, tmp1, #AT91_PMC_CSS_MAIN +save_mck: str tmp1, [pmc, tmp2] wait_mckrdy at91_plla_disable - ldr r0, .pm_mode - cmp r0, #AT91_PM_ULP1 + cmp tmp3, #AT91_PM_ULP1 beq ulp1_mode at91_pm_ulp0_mode -- 2.7.4 ^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH 2/3] ARM: at91: pm: add per soc validation of pm modes 2020-08-03 7:25 [PATCH 0/3] AT91 PM improvements Claudiu Beznea 2020-08-03 7:25 ` [PATCH 1/3] ARM: at91: pm: add support for ulp0 fast mode Claudiu Beznea @ 2020-08-03 7:25 ` Claudiu Beznea 2020-08-03 8:34 ` Alexandre Belloni 2020-08-03 7:25 ` [PATCH 3/3] ARM: at91: pm: put node after its usage Claudiu Beznea 2 siblings, 1 reply; 7+ messages in thread From: Claudiu Beznea @ 2020-08-03 7:25 UTC (permalink / raw) To: nicolas.ferre, alexandre.belloni, ludovic.desroches Cc: linux-arm-kernel, linux-kernel, Claudiu Beznea Not all SoCs supports all the PM mode. User may end up settings, e.g. backup mode, on a non SAMA5D2 device, but the mode to not be valid. If backup mode is used on a devices not supporting it there will be no way of resuming other than rebooting. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> --- arch/arm/mach-at91/at91rm9200.c | 10 +++++- arch/arm/mach-at91/at91sam9.c | 9 +++++- arch/arm/mach-at91/generic.h | 20 ++++++------ arch/arm/mach-at91/pm.c | 69 +++++++++++++++++++++++++++++++++++++---- arch/arm/mach-at91/sam9x60.c | 11 ++++++- arch/arm/mach-at91/sama5.c | 21 +++++++++++-- 6 files changed, 119 insertions(+), 21 deletions(-) diff --git a/arch/arm/mach-at91/at91rm9200.c b/arch/arm/mach-at91/at91rm9200.c index 4f8186211619..7318d8e16797 100644 --- a/arch/arm/mach-at91/at91rm9200.c +++ b/arch/arm/mach-at91/at91rm9200.c @@ -13,12 +13,20 @@ #include <asm/mach/arch.h> #include "generic.h" +#include "pm.h" + +/* AT91RM9200 valid PM modes. */ +static const int at91rm9200_pm_modes[] = { + AT91_PM_STANDBY, + AT91_PM_ULP0, +}; static void __init at91rm9200_dt_device_init(void) { of_platform_default_populate(NULL, NULL, NULL); - at91rm9200_pm_init(); + at91rm9200_pm_init(at91rm9200_pm_modes, + ARRAY_SIZE(at91rm9200_pm_modes)); } static const char *const at91rm9200_dt_board_compat[] __initconst = { diff --git a/arch/arm/mach-at91/at91sam9.c b/arch/arm/mach-at91/at91sam9.c index 7e572189a5eb..683f2c35a116 100644 --- a/arch/arm/mach-at91/at91sam9.c +++ b/arch/arm/mach-at91/at91sam9.c @@ -13,12 +13,19 @@ #include <asm/system_misc.h> #include "generic.h" +#include "pm.h" + +/* AT91SAM9 valid PM modes. */ +static const int at91sam9_pm_modes[] = { + AT91_PM_STANDBY, + AT91_PM_ULP0, +}; static void __init at91sam9_init(void) { of_platform_default_populate(NULL, NULL, NULL); - at91sam9_pm_init(); + at91sam9_pm_init(at91sam9_pm_modes, ARRAY_SIZE(at91sam9_pm_modes)); } static const char *const at91_dt_board_compat[] __initconst = { diff --git a/arch/arm/mach-at91/generic.h b/arch/arm/mach-at91/generic.h index 0a4cdcb4985b..610a12e5a71c 100644 --- a/arch/arm/mach-at91/generic.h +++ b/arch/arm/mach-at91/generic.h @@ -9,17 +9,17 @@ #define _AT91_GENERIC_H #ifdef CONFIG_PM -extern void __init at91rm9200_pm_init(void); -extern void __init at91sam9_pm_init(void); -extern void __init sam9x60_pm_init(void); -extern void __init sama5_pm_init(void); -extern void __init sama5d2_pm_init(void); +extern void __init at91rm9200_pm_init(const int *modes, int len); +extern void __init at91sam9_pm_init(const int *modes, int len); +extern void __init sam9x60_pm_init(const int *modes, int len); +extern void __init sama5_pm_init(const int *modes, int len); +extern void __init sama5d2_pm_init(const int *modes, int len); #else -static inline void __init at91rm9200_pm_init(void) { } -static inline void __init at91sam9_pm_init(void) { } -static inline void __init sam9x60_pm_init(void) { } -static inline void __init sama5_pm_init(void) { } -static inline void __init sama5d2_pm_init(void) { } +static inline void __init at91rm9200_pm_init(const int *modes, int len) { } +static inline void __init at91sam9_pm_init(const int *modes, int len) { } +static inline void __init sam9x60_pm_init(const int *modes, int len) { } +static inline void __init sama5_pm_init(const int *modes, int len) { } +static inline void __init sama5d2_pm_init(const int *modes, int len) { } #endif #endif /* _AT91_GENERIC_H */ diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c index 04fdcbd57100..caf87efc7eeb 100644 --- a/arch/arm/mach-at91/pm.c +++ b/arch/arm/mach-at91/pm.c @@ -785,6 +785,59 @@ static const struct of_device_id atmel_pmc_ids[] __initconst = { { /* sentinel */ }, }; +static void __init at91_pm_modes_validate(const int *modes, int len) +{ + u8 i, located = 0; + int mode; + +#define STANDBY BIT(0) +#define SUSPEND BIT(1) + + for (i = 0; i < len; i++) { + if ((located & STANDBY) && (located & SUSPEND)) + break; + + if (modes[i] == soc_pm.data.standby_mode && + !(located & STANDBY)) { + located |= STANDBY; + continue; + } + + if (modes[i] == soc_pm.data.suspend_mode && + !(located & SUSPEND)) { + located |= SUSPEND; + continue; + } + } + + if (!(located & STANDBY)) { + if (soc_pm.data.suspend_mode == AT91_PM_STANDBY) + mode = AT91_PM_ULP0; + else + mode = AT91_PM_STANDBY; + + pr_warn("AT91: PM: %s mode not supported! Using %s.\n", + pm_modes[soc_pm.data.standby_mode].pattern, + pm_modes[mode].pattern); + soc_pm.data.standby_mode = mode; + } + + if (!(located & SUSPEND)) { + if (soc_pm.data.standby_mode == AT91_PM_ULP0) + mode = AT91_PM_STANDBY; + else + mode = AT91_PM_ULP0; + + pr_warn("AT91: PM: %s mode not supported! Using %s.\n", + pm_modes[soc_pm.data.suspend_mode].pattern, + pm_modes[mode].pattern); + soc_pm.data.suspend_mode = mode; + } + +#undef STANDBY +#undef SUSPEND +} + static void __init at91_pm_init(void (*pm_idle)(void)) { struct device_node *pmc_np; @@ -821,11 +874,12 @@ static void __init at91_pm_init(void (*pm_idle)(void)) } } -void __init at91rm9200_pm_init(void) +void __init at91rm9200_pm_init(const int *modes, int len) { if (!IS_ENABLED(CONFIG_SOC_AT91RM9200)) return; + at91_pm_modes_validate(modes, len); at91_dt_ramc(); /* @@ -836,11 +890,12 @@ void __init at91rm9200_pm_init(void) at91_pm_init(at91rm9200_idle); } -void __init sam9x60_pm_init(void) +void __init sam9x60_pm_init(const int *modes, int len) { if (!IS_ENABLED(CONFIG_SOC_SAM9X60)) return; + at91_pm_modes_validate(modes, len); at91_pm_modes_init(); at91_dt_ramc(); at91_pm_init(at91sam9x60_idle); @@ -849,31 +904,33 @@ void __init sam9x60_pm_init(void) soc_pm.config_pmc_ws = at91_sam9x60_config_pmc_ws; } -void __init at91sam9_pm_init(void) +void __init at91sam9_pm_init(const int *modes, int len) { if (!IS_ENABLED(CONFIG_SOC_AT91SAM9)) return; + at91_pm_modes_validate(modes, len); at91_dt_ramc(); at91_pm_init(at91sam9_idle); } -void __init sama5_pm_init(void) +void __init sama5_pm_init(const int *modes, int len) { if (!IS_ENABLED(CONFIG_SOC_SAMA5)) return; + at91_pm_modes_validate(modes, len); at91_dt_ramc(); at91_pm_init(NULL); } -void __init sama5d2_pm_init(void) +void __init sama5d2_pm_init(const int *modes, int len) { if (!IS_ENABLED(CONFIG_SOC_SAMA5D2)) return; + sama5_pm_init(modes, len); at91_pm_modes_init(); - sama5_pm_init(); soc_pm.ws_ids = sama5d2_ws_ids; soc_pm.config_shdwc_ws = at91_sama5d2_config_shdwc_ws; diff --git a/arch/arm/mach-at91/sam9x60.c b/arch/arm/mach-at91/sam9x60.c index d8c739d25458..d7c869c7b542 100644 --- a/arch/arm/mach-at91/sam9x60.c +++ b/arch/arm/mach-at91/sam9x60.c @@ -14,12 +14,21 @@ #include <asm/system_misc.h> #include "generic.h" +#include "pm.h" + +/* SAM9X60 valid PM modes. */ +static const int sam9x60_pm_modes[] = { + AT91_PM_STANDBY, + AT91_PM_ULP0, + AT91_PM_ULP0_FAST, + AT91_PM_ULP1, +}; static void __init sam9x60_init(void) { of_platform_default_populate(NULL, NULL, NULL); - sam9x60_pm_init(); + sam9x60_pm_init(sam9x60_pm_modes, ARRAY_SIZE(sam9x60_pm_modes)); } static const char *const sam9x60_dt_board_compat[] __initconst = { diff --git a/arch/arm/mach-at91/sama5.c b/arch/arm/mach-at91/sama5.c index 89dab7cf01e8..7eb124612a10 100644 --- a/arch/arm/mach-at91/sama5.c +++ b/arch/arm/mach-at91/sama5.c @@ -14,11 +14,19 @@ #include <asm/system_misc.h> #include "generic.h" +#include "pm.h" + +/* SAMA5 valid PM modes. */ +static const int sama5_pm_modes[] = { + AT91_PM_STANDBY, + AT91_PM_ULP0, + AT91_PM_ULP0_FAST, +}; static void __init sama5_dt_device_init(void) { of_platform_default_populate(NULL, NULL, NULL); - sama5_pm_init(); + sama5_pm_init(sama5_pm_modes, ARRAY_SIZE(sama5_pm_modes)); } static const char *const sama5_dt_board_compat[] __initconst = { @@ -44,10 +52,19 @@ DT_MACHINE_START(sama5_alt_dt, "Atmel SAMA5") .l2c_aux_mask = ~0UL, MACHINE_END +/* sama5d2 PM modes. */ +static const int sama5d2_pm_modes[] = { + AT91_PM_STANDBY, + AT91_PM_ULP0, + AT91_PM_ULP0_FAST, + AT91_PM_ULP1, + AT91_PM_BACKUP, +}; + static void __init sama5d2_init(void) { of_platform_default_populate(NULL, NULL, NULL); - sama5d2_pm_init(); + sama5d2_pm_init(sama5d2_pm_modes, ARRAY_SIZE(sama5d2_pm_modes)); } static const char *const sama5d2_compat[] __initconst = { -- 2.7.4 ^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH 2/3] ARM: at91: pm: add per soc validation of pm modes 2020-08-03 7:25 ` [PATCH 2/3] ARM: at91: pm: add per soc validation of pm modes Claudiu Beznea @ 2020-08-03 8:34 ` Alexandre Belloni 2020-08-03 10:54 ` Claudiu.Beznea 0 siblings, 1 reply; 7+ messages in thread From: Alexandre Belloni @ 2020-08-03 8:34 UTC (permalink / raw) To: Claudiu Beznea Cc: nicolas.ferre, ludovic.desroches, linux-arm-kernel, linux-kernel On 03/08/2020 10:25:16+0300, Claudiu Beznea wrote: > Not all SoCs supports all the PM mode. User may end up settings, > e.g. backup mode, on a non SAMA5D2 device, but the mode to not be valid. > If backup mode is used on a devices not supporting it there will be no > way of resuming other than rebooting. I don't think this actually happens as if backup mode is requested on a non sama5d2 device, of_find_compatible_node(NULL, NULL, "atmel,sama5d2-sfrbu") will fail and the PM will default to AT91_PM_ULP0. ULP1 will also default to ULP0 if the shdwc is not from sama5d2 or sam9x60. I'm guessing the actual issue is introduced with ulp0 fast. > > Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> > --- > arch/arm/mach-at91/at91rm9200.c | 10 +++++- > arch/arm/mach-at91/at91sam9.c | 9 +++++- > arch/arm/mach-at91/generic.h | 20 ++++++------ > arch/arm/mach-at91/pm.c | 69 +++++++++++++++++++++++++++++++++++++---- > arch/arm/mach-at91/sam9x60.c | 11 ++++++- > arch/arm/mach-at91/sama5.c | 21 +++++++++++-- > 6 files changed, 119 insertions(+), 21 deletions(-) > > diff --git a/arch/arm/mach-at91/at91rm9200.c b/arch/arm/mach-at91/at91rm9200.c > index 4f8186211619..7318d8e16797 100644 > --- a/arch/arm/mach-at91/at91rm9200.c > +++ b/arch/arm/mach-at91/at91rm9200.c > @@ -13,12 +13,20 @@ > #include <asm/mach/arch.h> > > #include "generic.h" > +#include "pm.h" > + > +/* AT91RM9200 valid PM modes. */ > +static const int at91rm9200_pm_modes[] = { > + AT91_PM_STANDBY, > + AT91_PM_ULP0, > +}; > > static void __init at91rm9200_dt_device_init(void) > { > of_platform_default_populate(NULL, NULL, NULL); > > - at91rm9200_pm_init(); > + at91rm9200_pm_init(at91rm9200_pm_modes, > + ARRAY_SIZE(at91rm9200_pm_modes)); > } > You can avoid the changes in the soc files and leave everything contained in pm.c as each <soc>_pm_init has a known list of mode that will very likely never change. Bonus points if you make the arrays __initdata. > static const char *const at91rm9200_dt_board_compat[] __initconst = { > diff --git a/arch/arm/mach-at91/at91sam9.c b/arch/arm/mach-at91/at91sam9.c > index 7e572189a5eb..683f2c35a116 100644 > --- a/arch/arm/mach-at91/at91sam9.c > +++ b/arch/arm/mach-at91/at91sam9.c > @@ -13,12 +13,19 @@ > #include <asm/system_misc.h> > > #include "generic.h" > +#include "pm.h" > + > +/* AT91SAM9 valid PM modes. */ > +static const int at91sam9_pm_modes[] = { > + AT91_PM_STANDBY, > + AT91_PM_ULP0, > +}; > > static void __init at91sam9_init(void) > { > of_platform_default_populate(NULL, NULL, NULL); > > - at91sam9_pm_init(); > + at91sam9_pm_init(at91sam9_pm_modes, ARRAY_SIZE(at91sam9_pm_modes)); > } > > static const char *const at91_dt_board_compat[] __initconst = { > diff --git a/arch/arm/mach-at91/generic.h b/arch/arm/mach-at91/generic.h > index 0a4cdcb4985b..610a12e5a71c 100644 > --- a/arch/arm/mach-at91/generic.h > +++ b/arch/arm/mach-at91/generic.h > @@ -9,17 +9,17 @@ > #define _AT91_GENERIC_H > > #ifdef CONFIG_PM > -extern void __init at91rm9200_pm_init(void); > -extern void __init at91sam9_pm_init(void); > -extern void __init sam9x60_pm_init(void); > -extern void __init sama5_pm_init(void); > -extern void __init sama5d2_pm_init(void); > +extern void __init at91rm9200_pm_init(const int *modes, int len); > +extern void __init at91sam9_pm_init(const int *modes, int len); > +extern void __init sam9x60_pm_init(const int *modes, int len); > +extern void __init sama5_pm_init(const int *modes, int len); > +extern void __init sama5d2_pm_init(const int *modes, int len); > #else > -static inline void __init at91rm9200_pm_init(void) { } > -static inline void __init at91sam9_pm_init(void) { } > -static inline void __init sam9x60_pm_init(void) { } > -static inline void __init sama5_pm_init(void) { } > -static inline void __init sama5d2_pm_init(void) { } > +static inline void __init at91rm9200_pm_init(const int *modes, int len) { } > +static inline void __init at91sam9_pm_init(const int *modes, int len) { } > +static inline void __init sam9x60_pm_init(const int *modes, int len) { } > +static inline void __init sama5_pm_init(const int *modes, int len) { } > +static inline void __init sama5d2_pm_init(const int *modes, int len) { } > #endif > Then this change is not necessary. > #endif /* _AT91_GENERIC_H */ > diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c > index 04fdcbd57100..caf87efc7eeb 100644 > --- a/arch/arm/mach-at91/pm.c > +++ b/arch/arm/mach-at91/pm.c > @@ -785,6 +785,59 @@ static const struct of_device_id atmel_pmc_ids[] __initconst = { > { /* sentinel */ }, > }; > > +static void __init at91_pm_modes_validate(const int *modes, int len) > +{ > + u8 i, located = 0; > + int mode; > + > +#define STANDBY BIT(0) > +#define SUSPEND BIT(1) > + > + for (i = 0; i < len; i++) { > + if ((located & STANDBY) && (located & SUSPEND)) > + break; > + > + if (modes[i] == soc_pm.data.standby_mode && > + !(located & STANDBY)) { > + located |= STANDBY; > + continue; > + } > + > + if (modes[i] == soc_pm.data.suspend_mode && > + !(located & SUSPEND)) { > + located |= SUSPEND; > + continue; > + } > + } > + > + if (!(located & STANDBY)) { > + if (soc_pm.data.suspend_mode == AT91_PM_STANDBY) > + mode = AT91_PM_ULP0; > + else > + mode = AT91_PM_STANDBY; > + > + pr_warn("AT91: PM: %s mode not supported! Using %s.\n", > + pm_modes[soc_pm.data.standby_mode].pattern, > + pm_modes[mode].pattern); > + soc_pm.data.standby_mode = mode; > + } > + > + if (!(located & SUSPEND)) { > + if (soc_pm.data.standby_mode == AT91_PM_ULP0) > + mode = AT91_PM_STANDBY; > + else > + mode = AT91_PM_ULP0; > + > + pr_warn("AT91: PM: %s mode not supported! Using %s.\n", > + pm_modes[soc_pm.data.suspend_mode].pattern, > + pm_modes[mode].pattern); > + soc_pm.data.suspend_mode = mode; > + } > + > +#undef STANDBY > +#undef SUSPEND You should use two booleans instead of a bit array, this would not make the code longer and will avoid this #def/#undef thing. > +} > + > static void __init at91_pm_init(void (*pm_idle)(void)) > { > struct device_node *pmc_np; > @@ -821,11 +874,12 @@ static void __init at91_pm_init(void (*pm_idle)(void)) > } > } > > -void __init at91rm9200_pm_init(void) > +void __init at91rm9200_pm_init(const int *modes, int len) > { > if (!IS_ENABLED(CONFIG_SOC_AT91RM9200)) > return; > > + at91_pm_modes_validate(modes, len); > at91_dt_ramc(); > > /* > @@ -836,11 +890,12 @@ void __init at91rm9200_pm_init(void) > at91_pm_init(at91rm9200_idle); > } > > -void __init sam9x60_pm_init(void) > +void __init sam9x60_pm_init(const int *modes, int len) > { > if (!IS_ENABLED(CONFIG_SOC_SAM9X60)) > return; > > + at91_pm_modes_validate(modes, len); > at91_pm_modes_init(); > at91_dt_ramc(); > at91_pm_init(at91sam9x60_idle); > @@ -849,31 +904,33 @@ void __init sam9x60_pm_init(void) > soc_pm.config_pmc_ws = at91_sam9x60_config_pmc_ws; > } > > -void __init at91sam9_pm_init(void) > +void __init at91sam9_pm_init(const int *modes, int len) > { > if (!IS_ENABLED(CONFIG_SOC_AT91SAM9)) > return; > > + at91_pm_modes_validate(modes, len); > at91_dt_ramc(); > at91_pm_init(at91sam9_idle); > } > > -void __init sama5_pm_init(void) > +void __init sama5_pm_init(const int *modes, int len) > { > if (!IS_ENABLED(CONFIG_SOC_SAMA5)) > return; > > + at91_pm_modes_validate(modes, len); > at91_dt_ramc(); > at91_pm_init(NULL); > } > > -void __init sama5d2_pm_init(void) > +void __init sama5d2_pm_init(const int *modes, int len) > { > if (!IS_ENABLED(CONFIG_SOC_SAMA5D2)) > return; > > + sama5_pm_init(modes, len); > at91_pm_modes_init(); > - sama5_pm_init(); > > soc_pm.ws_ids = sama5d2_ws_ids; > soc_pm.config_shdwc_ws = at91_sama5d2_config_shdwc_ws; > diff --git a/arch/arm/mach-at91/sam9x60.c b/arch/arm/mach-at91/sam9x60.c > index d8c739d25458..d7c869c7b542 100644 > --- a/arch/arm/mach-at91/sam9x60.c > +++ b/arch/arm/mach-at91/sam9x60.c > @@ -14,12 +14,21 @@ > #include <asm/system_misc.h> > > #include "generic.h" > +#include "pm.h" > + > +/* SAM9X60 valid PM modes. */ > +static const int sam9x60_pm_modes[] = { > + AT91_PM_STANDBY, > + AT91_PM_ULP0, > + AT91_PM_ULP0_FAST, > + AT91_PM_ULP1, > +}; > > static void __init sam9x60_init(void) > { > of_platform_default_populate(NULL, NULL, NULL); > > - sam9x60_pm_init(); > + sam9x60_pm_init(sam9x60_pm_modes, ARRAY_SIZE(sam9x60_pm_modes)); > } > > static const char *const sam9x60_dt_board_compat[] __initconst = { > diff --git a/arch/arm/mach-at91/sama5.c b/arch/arm/mach-at91/sama5.c > index 89dab7cf01e8..7eb124612a10 100644 > --- a/arch/arm/mach-at91/sama5.c > +++ b/arch/arm/mach-at91/sama5.c > @@ -14,11 +14,19 @@ > #include <asm/system_misc.h> > > #include "generic.h" > +#include "pm.h" > + > +/* SAMA5 valid PM modes. */ > +static const int sama5_pm_modes[] = { > + AT91_PM_STANDBY, > + AT91_PM_ULP0, > + AT91_PM_ULP0_FAST, > +}; > > static void __init sama5_dt_device_init(void) > { > of_platform_default_populate(NULL, NULL, NULL); > - sama5_pm_init(); > + sama5_pm_init(sama5_pm_modes, ARRAY_SIZE(sama5_pm_modes)); > } > > static const char *const sama5_dt_board_compat[] __initconst = { > @@ -44,10 +52,19 @@ DT_MACHINE_START(sama5_alt_dt, "Atmel SAMA5") > .l2c_aux_mask = ~0UL, > MACHINE_END > > +/* sama5d2 PM modes. */ > +static const int sama5d2_pm_modes[] = { > + AT91_PM_STANDBY, > + AT91_PM_ULP0, > + AT91_PM_ULP0_FAST, > + AT91_PM_ULP1, > + AT91_PM_BACKUP, > +}; > + > static void __init sama5d2_init(void) > { > of_platform_default_populate(NULL, NULL, NULL); > - sama5d2_pm_init(); > + sama5d2_pm_init(sama5d2_pm_modes, ARRAY_SIZE(sama5d2_pm_modes)); > } > > static const char *const sama5d2_compat[] __initconst = { > -- > 2.7.4 > -- Alexandre Belloni, Bootlin Embedded Linux and Kernel engineering https://bootlin.com ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 2/3] ARM: at91: pm: add per soc validation of pm modes 2020-08-03 8:34 ` Alexandre Belloni @ 2020-08-03 10:54 ` Claudiu.Beznea 2020-08-03 12:51 ` Alexandre Belloni 0 siblings, 1 reply; 7+ messages in thread From: Claudiu.Beznea @ 2020-08-03 10:54 UTC (permalink / raw) To: alexandre.belloni Cc: Nicolas.Ferre, Ludovic.Desroches, linux-arm-kernel, linux-kernel On 03.08.2020 11:34, Alexandre Belloni wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > On 03/08/2020 10:25:16+0300, Claudiu Beznea wrote: >> Not all SoCs supports all the PM mode. User may end up settings, >> e.g. backup mode, on a non SAMA5D2 device, but the mode to not be valid. >> If backup mode is used on a devices not supporting it there will be no >> way of resuming other than rebooting. > > I don't think this actually happens as if backup mode is requested on a > non sama5d2 device, of_find_compatible_node(NULL, NULL, > "atmel,sama5d2-sfrbu") will fail and the PM will default to > AT91_PM_ULP0. of_find_compatible_node(NULL, NULL, "atmel,sama5d2-sfrbu") is called by at91_pm_backup_init() which is called by at91_pm_modes_init() which is called only by sam9x60_pm_init() and sama5d2_pm_init(). Same thing with shutdown controller compatibles. Concluding, backup could be requested for SoCs calling: - at91rm9200_pm_init() - at91sam9_pm_init() - sama5_pm_init() The other solution for this would be to call at91_pm_modes_init() also in the functions above. I choose the approach in this patch to avoid tracking the dependency b/w compatibles and supported modes. Let me know what would you prefer as a solution. > > ULP1 will also default to ULP0 if the shdwc is not from sama5d2 or > sam9x60.> > I'm guessing the actual issue is introduced with ulp0 fast. > >> >> Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> >> --- >> arch/arm/mach-at91/at91rm9200.c | 10 +++++- >> arch/arm/mach-at91/at91sam9.c | 9 +++++- >> arch/arm/mach-at91/generic.h | 20 ++++++------ >> arch/arm/mach-at91/pm.c | 69 +++++++++++++++++++++++++++++++++++++---- >> arch/arm/mach-at91/sam9x60.c | 11 ++++++- >> arch/arm/mach-at91/sama5.c | 21 +++++++++++-- >> 6 files changed, 119 insertions(+), 21 deletions(-) >> >> diff --git a/arch/arm/mach-at91/at91rm9200.c b/arch/arm/mach-at91/at91rm9200.c >> index 4f8186211619..7318d8e16797 100644 >> --- a/arch/arm/mach-at91/at91rm9200.c >> +++ b/arch/arm/mach-at91/at91rm9200.c >> @@ -13,12 +13,20 @@ >> #include <asm/mach/arch.h> >> >> #include "generic.h" >> +#include "pm.h" >> + >> +/* AT91RM9200 valid PM modes. */ >> +static const int at91rm9200_pm_modes[] = { >> + AT91_PM_STANDBY, >> + AT91_PM_ULP0, >> +}; >> >> static void __init at91rm9200_dt_device_init(void) >> { >> of_platform_default_populate(NULL, NULL, NULL); >> >> - at91rm9200_pm_init(); >> + at91rm9200_pm_init(at91rm9200_pm_modes, >> + ARRAY_SIZE(at91rm9200_pm_modes)); >> } >> > > You can avoid the changes in the soc files and leave everything > contained in pm.c as each <soc>_pm_init has a known list of mode that > will very likely never change. Bonus points if you make the arrays > __initdata. That was my initial approach. I went with the one in this patch to avoid adding yet another struct of_device_id array in pm.c and keep code in pm.c somehow platform independent. If you feel is better your way, then OK, I have no problems with moving it in pm.c. > >> static const char *const at91rm9200_dt_board_compat[] __initconst = { >> diff --git a/arch/arm/mach-at91/at91sam9.c b/arch/arm/mach-at91/at91sam9.c >> index 7e572189a5eb..683f2c35a116 100644 >> --- a/arch/arm/mach-at91/at91sam9.c >> +++ b/arch/arm/mach-at91/at91sam9.c >> @@ -13,12 +13,19 @@ >> #include <asm/system_misc.h> >> >> #include "generic.h" >> +#include "pm.h" >> + >> +/* AT91SAM9 valid PM modes. */ >> +static const int at91sam9_pm_modes[] = { >> + AT91_PM_STANDBY, >> + AT91_PM_ULP0, >> +}; >> >> static void __init at91sam9_init(void) >> { >> of_platform_default_populate(NULL, NULL, NULL); >> >> - at91sam9_pm_init(); >> + at91sam9_pm_init(at91sam9_pm_modes, ARRAY_SIZE(at91sam9_pm_modes)); >> } >> >> static const char *const at91_dt_board_compat[] __initconst = { >> diff --git a/arch/arm/mach-at91/generic.h b/arch/arm/mach-at91/generic.h >> index 0a4cdcb4985b..610a12e5a71c 100644 >> --- a/arch/arm/mach-at91/generic.h >> +++ b/arch/arm/mach-at91/generic.h >> @@ -9,17 +9,17 @@ >> #define _AT91_GENERIC_H >> >> #ifdef CONFIG_PM >> -extern void __init at91rm9200_pm_init(void); >> -extern void __init at91sam9_pm_init(void); >> -extern void __init sam9x60_pm_init(void); >> -extern void __init sama5_pm_init(void); >> -extern void __init sama5d2_pm_init(void); >> +extern void __init at91rm9200_pm_init(const int *modes, int len); >> +extern void __init at91sam9_pm_init(const int *modes, int len); >> +extern void __init sam9x60_pm_init(const int *modes, int len); >> +extern void __init sama5_pm_init(const int *modes, int len); >> +extern void __init sama5d2_pm_init(const int *modes, int len); >> #else >> -static inline void __init at91rm9200_pm_init(void) { } >> -static inline void __init at91sam9_pm_init(void) { } >> -static inline void __init sam9x60_pm_init(void) { } >> -static inline void __init sama5_pm_init(void) { } >> -static inline void __init sama5d2_pm_init(void) { } >> +static inline void __init at91rm9200_pm_init(const int *modes, int len) { } >> +static inline void __init at91sam9_pm_init(const int *modes, int len) { } >> +static inline void __init sam9x60_pm_init(const int *modes, int len) { } >> +static inline void __init sama5_pm_init(const int *modes, int len) { } >> +static inline void __init sama5d2_pm_init(const int *modes, int len) { } >> #endif >> > > Then this change is not necessary. > >> #endif /* _AT91_GENERIC_H */ >> diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c >> index 04fdcbd57100..caf87efc7eeb 100644 >> --- a/arch/arm/mach-at91/pm.c >> +++ b/arch/arm/mach-at91/pm.c >> @@ -785,6 +785,59 @@ static const struct of_device_id atmel_pmc_ids[] __initconst = { >> { /* sentinel */ }, >> }; >> >> +static void __init at91_pm_modes_validate(const int *modes, int len) >> +{ >> + u8 i, located = 0; >> + int mode; >> + >> +#define STANDBY BIT(0) >> +#define SUSPEND BIT(1) >> + >> + for (i = 0; i < len; i++) { >> + if ((located & STANDBY) && (located & SUSPEND)) >> + break; >> + >> + if (modes[i] == soc_pm.data.standby_mode && >> + !(located & STANDBY)) { >> + located |= STANDBY; >> + continue; >> + } >> + >> + if (modes[i] == soc_pm.data.suspend_mode && >> + !(located & SUSPEND)) { >> + located |= SUSPEND; >> + continue; >> + } >> + } >> + >> + if (!(located & STANDBY)) { >> + if (soc_pm.data.suspend_mode == AT91_PM_STANDBY) >> + mode = AT91_PM_ULP0; >> + else >> + mode = AT91_PM_STANDBY; >> + >> + pr_warn("AT91: PM: %s mode not supported! Using %s.\n", >> + pm_modes[soc_pm.data.standby_mode].pattern, >> + pm_modes[mode].pattern); >> + soc_pm.data.standby_mode = mode; >> + } >> + >> + if (!(located & SUSPEND)) { >> + if (soc_pm.data.standby_mode == AT91_PM_ULP0) >> + mode = AT91_PM_STANDBY; >> + else >> + mode = AT91_PM_ULP0; >> + >> + pr_warn("AT91: PM: %s mode not supported! Using %s.\n", >> + pm_modes[soc_pm.data.suspend_mode].pattern, >> + pm_modes[mode].pattern); >> + soc_pm.data.suspend_mode = mode; >> + } >> + >> +#undef STANDBY >> +#undef SUSPEND > > You should use two booleans instead of a bit array, this would not make > the code longer and will avoid this #def/#undef thing. OK, I have no strong opinion on this. I'll switch to booleans. > >> +} >> + >> static void __init at91_pm_init(void (*pm_idle)(void)) >> { >> struct device_node *pmc_np; >> @@ -821,11 +874,12 @@ static void __init at91_pm_init(void (*pm_idle)(void)) >> } >> } >> >> -void __init at91rm9200_pm_init(void) >> +void __init at91rm9200_pm_init(const int *modes, int len) >> { >> if (!IS_ENABLED(CONFIG_SOC_AT91RM9200)) >> return; >> >> + at91_pm_modes_validate(modes, len); >> at91_dt_ramc(); >> >> /* >> @@ -836,11 +890,12 @@ void __init at91rm9200_pm_init(void) >> at91_pm_init(at91rm9200_idle); >> } >> >> -void __init sam9x60_pm_init(void) >> +void __init sam9x60_pm_init(const int *modes, int len) >> { >> if (!IS_ENABLED(CONFIG_SOC_SAM9X60)) >> return; >> >> + at91_pm_modes_validate(modes, len); >> at91_pm_modes_init(); >> at91_dt_ramc(); >> at91_pm_init(at91sam9x60_idle); >> @@ -849,31 +904,33 @@ void __init sam9x60_pm_init(void) >> soc_pm.config_pmc_ws = at91_sam9x60_config_pmc_ws; >> } >> >> -void __init at91sam9_pm_init(void) >> +void __init at91sam9_pm_init(const int *modes, int len) >> { >> if (!IS_ENABLED(CONFIG_SOC_AT91SAM9)) >> return; >> >> + at91_pm_modes_validate(modes, len); >> at91_dt_ramc(); >> at91_pm_init(at91sam9_idle); >> } >> >> -void __init sama5_pm_init(void) >> +void __init sama5_pm_init(const int *modes, int len) >> { >> if (!IS_ENABLED(CONFIG_SOC_SAMA5)) >> return; >> >> + at91_pm_modes_validate(modes, len); >> at91_dt_ramc(); >> at91_pm_init(NULL); >> } >> >> -void __init sama5d2_pm_init(void) >> +void __init sama5d2_pm_init(const int *modes, int len) >> { >> if (!IS_ENABLED(CONFIG_SOC_SAMA5D2)) >> return; >> >> + sama5_pm_init(modes, len); >> at91_pm_modes_init(); >> - sama5_pm_init(); >> >> soc_pm.ws_ids = sama5d2_ws_ids; >> soc_pm.config_shdwc_ws = at91_sama5d2_config_shdwc_ws; >> diff --git a/arch/arm/mach-at91/sam9x60.c b/arch/arm/mach-at91/sam9x60.c >> index d8c739d25458..d7c869c7b542 100644 >> --- a/arch/arm/mach-at91/sam9x60.c >> +++ b/arch/arm/mach-at91/sam9x60.c >> @@ -14,12 +14,21 @@ >> #include <asm/system_misc.h> >> >> #include "generic.h" >> +#include "pm.h" >> + >> +/* SAM9X60 valid PM modes. */ >> +static const int sam9x60_pm_modes[] = { >> + AT91_PM_STANDBY, >> + AT91_PM_ULP0, >> + AT91_PM_ULP0_FAST, >> + AT91_PM_ULP1, >> +}; >> >> static void __init sam9x60_init(void) >> { >> of_platform_default_populate(NULL, NULL, NULL); >> >> - sam9x60_pm_init(); >> + sam9x60_pm_init(sam9x60_pm_modes, ARRAY_SIZE(sam9x60_pm_modes)); >> } >> >> static const char *const sam9x60_dt_board_compat[] __initconst = { >> diff --git a/arch/arm/mach-at91/sama5.c b/arch/arm/mach-at91/sama5.c >> index 89dab7cf01e8..7eb124612a10 100644 >> --- a/arch/arm/mach-at91/sama5.c >> +++ b/arch/arm/mach-at91/sama5.c >> @@ -14,11 +14,19 @@ >> #include <asm/system_misc.h> >> >> #include "generic.h" >> +#include "pm.h" >> + >> +/* SAMA5 valid PM modes. */ >> +static const int sama5_pm_modes[] = { >> + AT91_PM_STANDBY, >> + AT91_PM_ULP0, >> + AT91_PM_ULP0_FAST, >> +}; >> >> static void __init sama5_dt_device_init(void) >> { >> of_platform_default_populate(NULL, NULL, NULL); >> - sama5_pm_init(); >> + sama5_pm_init(sama5_pm_modes, ARRAY_SIZE(sama5_pm_modes)); >> } >> >> static const char *const sama5_dt_board_compat[] __initconst = { >> @@ -44,10 +52,19 @@ DT_MACHINE_START(sama5_alt_dt, "Atmel SAMA5") >> .l2c_aux_mask = ~0UL, >> MACHINE_END >> >> +/* sama5d2 PM modes. */ >> +static const int sama5d2_pm_modes[] = { >> + AT91_PM_STANDBY, >> + AT91_PM_ULP0, >> + AT91_PM_ULP0_FAST, >> + AT91_PM_ULP1, >> + AT91_PM_BACKUP, >> +}; >> + >> static void __init sama5d2_init(void) >> { >> of_platform_default_populate(NULL, NULL, NULL); >> - sama5d2_pm_init(); >> + sama5d2_pm_init(sama5d2_pm_modes, ARRAY_SIZE(sama5d2_pm_modes)); >> } >> >> static const char *const sama5d2_compat[] __initconst = { >> -- >> 2.7.4 >> > > -- > Alexandre Belloni, Bootlin > Embedded Linux and Kernel engineering > https://bootlin.com > ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 2/3] ARM: at91: pm: add per soc validation of pm modes 2020-08-03 10:54 ` Claudiu.Beznea @ 2020-08-03 12:51 ` Alexandre Belloni 0 siblings, 0 replies; 7+ messages in thread From: Alexandre Belloni @ 2020-08-03 12:51 UTC (permalink / raw) To: Claudiu.Beznea Cc: Nicolas.Ferre, Ludovic.Desroches, linux-arm-kernel, linux-kernel On 03/08/2020 10:54:51+0000, Claudiu.Beznea@microchip.com wrote: > >> diff --git a/arch/arm/mach-at91/at91rm9200.c b/arch/arm/mach-at91/at91rm9200.c > >> index 4f8186211619..7318d8e16797 100644 > >> --- a/arch/arm/mach-at91/at91rm9200.c > >> +++ b/arch/arm/mach-at91/at91rm9200.c > >> @@ -13,12 +13,20 @@ > >> #include <asm/mach/arch.h> > >> > >> #include "generic.h" > >> +#include "pm.h" > >> + > >> +/* AT91RM9200 valid PM modes. */ > >> +static const int at91rm9200_pm_modes[] = { > >> + AT91_PM_STANDBY, > >> + AT91_PM_ULP0, > >> +}; > >> > >> static void __init at91rm9200_dt_device_init(void) > >> { > >> of_platform_default_populate(NULL, NULL, NULL); > >> > >> - at91rm9200_pm_init(); > >> + at91rm9200_pm_init(at91rm9200_pm_modes, > >> + ARRAY_SIZE(at91rm9200_pm_modes)); > >> } > >> > > > > You can avoid the changes in the soc files and leave everything > > contained in pm.c as each <soc>_pm_init has a known list of mode that > > will very likely never change. Bonus points if you make the arrays > > __initdata. > > That was my initial approach. I went with the one in this patch to avoid > adding yet another struct of_device_id array in pm.c and keep code in pm.c > somehow platform independent. If you feel is better your way, then OK, I > have no problems with moving it in pm.c. > You don't need an other struct of_device_id array as you already have all the _pm_init functions broken out by soc family. Going further, for at91rm9200_pm_init and at91sam9_pm_init, maybe you can simply enforce soc_pm.data.standby_mode = AT91_PM_STANDBY and soc_pm.data.suspend_mode = AT91_PM_ULP0 instead of checking the modes. > > > >> static const char *const at91rm9200_dt_board_compat[] __initconst = { > >> diff --git a/arch/arm/mach-at91/at91sam9.c b/arch/arm/mach-at91/at91sam9.c > >> index 7e572189a5eb..683f2c35a116 100644 > >> --- a/arch/arm/mach-at91/at91sam9.c > >> +++ b/arch/arm/mach-at91/at91sam9.c > >> @@ -13,12 +13,19 @@ > >> #include <asm/system_misc.h> > >> > >> #include "generic.h" > >> +#include "pm.h" > >> + > >> +/* AT91SAM9 valid PM modes. */ > >> +static const int at91sam9_pm_modes[] = { > >> + AT91_PM_STANDBY, > >> + AT91_PM_ULP0, > >> +}; > >> > >> static void __init at91sam9_init(void) > >> { > >> of_platform_default_populate(NULL, NULL, NULL); > >> > >> - at91sam9_pm_init(); > >> + at91sam9_pm_init(at91sam9_pm_modes, ARRAY_SIZE(at91sam9_pm_modes)); > >> } > >> > >> static const char *const at91_dt_board_compat[] __initconst = { > >> diff --git a/arch/arm/mach-at91/generic.h b/arch/arm/mach-at91/generic.h > >> index 0a4cdcb4985b..610a12e5a71c 100644 > >> --- a/arch/arm/mach-at91/generic.h > >> +++ b/arch/arm/mach-at91/generic.h > >> @@ -9,17 +9,17 @@ > >> #define _AT91_GENERIC_H > >> > >> #ifdef CONFIG_PM > >> -extern void __init at91rm9200_pm_init(void); > >> -extern void __init at91sam9_pm_init(void); > >> -extern void __init sam9x60_pm_init(void); > >> -extern void __init sama5_pm_init(void); > >> -extern void __init sama5d2_pm_init(void); > >> +extern void __init at91rm9200_pm_init(const int *modes, int len); > >> +extern void __init at91sam9_pm_init(const int *modes, int len); > >> +extern void __init sam9x60_pm_init(const int *modes, int len); > >> +extern void __init sama5_pm_init(const int *modes, int len); > >> +extern void __init sama5d2_pm_init(const int *modes, int len); > >> #else > >> -static inline void __init at91rm9200_pm_init(void) { } > >> -static inline void __init at91sam9_pm_init(void) { } > >> -static inline void __init sam9x60_pm_init(void) { } > >> -static inline void __init sama5_pm_init(void) { } > >> -static inline void __init sama5d2_pm_init(void) { } > >> +static inline void __init at91rm9200_pm_init(const int *modes, int len) { } > >> +static inline void __init at91sam9_pm_init(const int *modes, int len) { } > >> +static inline void __init sam9x60_pm_init(const int *modes, int len) { } > >> +static inline void __init sama5_pm_init(const int *modes, int len) { } > >> +static inline void __init sama5d2_pm_init(const int *modes, int len) { } > >> #endif > >> > > > > Then this change is not necessary. > > > >> #endif /* _AT91_GENERIC_H */ > >> diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c > >> index 04fdcbd57100..caf87efc7eeb 100644 > >> --- a/arch/arm/mach-at91/pm.c > >> +++ b/arch/arm/mach-at91/pm.c > >> @@ -785,6 +785,59 @@ static const struct of_device_id atmel_pmc_ids[] __initconst = { > >> { /* sentinel */ }, > >> }; > >> > >> +static void __init at91_pm_modes_validate(const int *modes, int len) > >> +{ > >> + u8 i, located = 0; > >> + int mode; > >> + > >> +#define STANDBY BIT(0) > >> +#define SUSPEND BIT(1) > >> + > >> + for (i = 0; i < len; i++) { > >> + if ((located & STANDBY) && (located & SUSPEND)) > >> + break; > >> + > >> + if (modes[i] == soc_pm.data.standby_mode && > >> + !(located & STANDBY)) { > >> + located |= STANDBY; > >> + continue; > >> + } > >> + > >> + if (modes[i] == soc_pm.data.suspend_mode && > >> + !(located & SUSPEND)) { > >> + located |= SUSPEND; > >> + continue; > >> + } > >> + } > >> + > >> + if (!(located & STANDBY)) { > >> + if (soc_pm.data.suspend_mode == AT91_PM_STANDBY) > >> + mode = AT91_PM_ULP0; > >> + else > >> + mode = AT91_PM_STANDBY; > >> + > >> + pr_warn("AT91: PM: %s mode not supported! Using %s.\n", > >> + pm_modes[soc_pm.data.standby_mode].pattern, > >> + pm_modes[mode].pattern); > >> + soc_pm.data.standby_mode = mode; > >> + } > >> + > >> + if (!(located & SUSPEND)) { > >> + if (soc_pm.data.standby_mode == AT91_PM_ULP0) > >> + mode = AT91_PM_STANDBY; > >> + else > >> + mode = AT91_PM_ULP0; > >> + > >> + pr_warn("AT91: PM: %s mode not supported! Using %s.\n", > >> + pm_modes[soc_pm.data.suspend_mode].pattern, > >> + pm_modes[mode].pattern); > >> + soc_pm.data.suspend_mode = mode; > >> + } > >> + > >> +#undef STANDBY > >> +#undef SUSPEND > > > > You should use two booleans instead of a bit array, this would not make > > the code longer and will avoid this #def/#undef thing. > > OK, I have no strong opinion on this. I'll switch to booleans. > > > > >> +} > >> + > >> static void __init at91_pm_init(void (*pm_idle)(void)) > >> { > >> struct device_node *pmc_np; > >> @@ -821,11 +874,12 @@ static void __init at91_pm_init(void (*pm_idle)(void)) > >> } > >> } > >> > >> -void __init at91rm9200_pm_init(void) > >> +void __init at91rm9200_pm_init(const int *modes, int len) > >> { > >> if (!IS_ENABLED(CONFIG_SOC_AT91RM9200)) > >> return; > >> > >> + at91_pm_modes_validate(modes, len); > >> at91_dt_ramc(); > >> > >> /* > >> @@ -836,11 +890,12 @@ void __init at91rm9200_pm_init(void) > >> at91_pm_init(at91rm9200_idle); > >> } > >> > >> -void __init sam9x60_pm_init(void) > >> +void __init sam9x60_pm_init(const int *modes, int len) > >> { > >> if (!IS_ENABLED(CONFIG_SOC_SAM9X60)) > >> return; > >> > >> + at91_pm_modes_validate(modes, len); > >> at91_pm_modes_init(); > >> at91_dt_ramc(); > >> at91_pm_init(at91sam9x60_idle); > >> @@ -849,31 +904,33 @@ void __init sam9x60_pm_init(void) > >> soc_pm.config_pmc_ws = at91_sam9x60_config_pmc_ws; > >> } > >> > >> -void __init at91sam9_pm_init(void) > >> +void __init at91sam9_pm_init(const int *modes, int len) > >> { > >> if (!IS_ENABLED(CONFIG_SOC_AT91SAM9)) > >> return; > >> > >> + at91_pm_modes_validate(modes, len); > >> at91_dt_ramc(); > >> at91_pm_init(at91sam9_idle); > >> } > >> > >> -void __init sama5_pm_init(void) > >> +void __init sama5_pm_init(const int *modes, int len) > >> { > >> if (!IS_ENABLED(CONFIG_SOC_SAMA5)) > >> return; > >> > >> + at91_pm_modes_validate(modes, len); > >> at91_dt_ramc(); > >> at91_pm_init(NULL); > >> } > >> > >> -void __init sama5d2_pm_init(void) > >> +void __init sama5d2_pm_init(const int *modes, int len) > >> { > >> if (!IS_ENABLED(CONFIG_SOC_SAMA5D2)) > >> return; > >> > >> + sama5_pm_init(modes, len); > >> at91_pm_modes_init(); > >> - sama5_pm_init(); > >> > >> soc_pm.ws_ids = sama5d2_ws_ids; > >> soc_pm.config_shdwc_ws = at91_sama5d2_config_shdwc_ws; > >> diff --git a/arch/arm/mach-at91/sam9x60.c b/arch/arm/mach-at91/sam9x60.c > >> index d8c739d25458..d7c869c7b542 100644 > >> --- a/arch/arm/mach-at91/sam9x60.c > >> +++ b/arch/arm/mach-at91/sam9x60.c > >> @@ -14,12 +14,21 @@ > >> #include <asm/system_misc.h> > >> > >> #include "generic.h" > >> +#include "pm.h" > >> + > >> +/* SAM9X60 valid PM modes. */ > >> +static const int sam9x60_pm_modes[] = { > >> + AT91_PM_STANDBY, > >> + AT91_PM_ULP0, > >> + AT91_PM_ULP0_FAST, > >> + AT91_PM_ULP1, > >> +}; > >> > >> static void __init sam9x60_init(void) > >> { > >> of_platform_default_populate(NULL, NULL, NULL); > >> > >> - sam9x60_pm_init(); > >> + sam9x60_pm_init(sam9x60_pm_modes, ARRAY_SIZE(sam9x60_pm_modes)); > >> } > >> > >> static const char *const sam9x60_dt_board_compat[] __initconst = { > >> diff --git a/arch/arm/mach-at91/sama5.c b/arch/arm/mach-at91/sama5.c > >> index 89dab7cf01e8..7eb124612a10 100644 > >> --- a/arch/arm/mach-at91/sama5.c > >> +++ b/arch/arm/mach-at91/sama5.c > >> @@ -14,11 +14,19 @@ > >> #include <asm/system_misc.h> > >> > >> #include "generic.h" > >> +#include "pm.h" > >> + > >> +/* SAMA5 valid PM modes. */ > >> +static const int sama5_pm_modes[] = { > >> + AT91_PM_STANDBY, > >> + AT91_PM_ULP0, > >> + AT91_PM_ULP0_FAST, > >> +}; > >> > >> static void __init sama5_dt_device_init(void) > >> { > >> of_platform_default_populate(NULL, NULL, NULL); > >> - sama5_pm_init(); > >> + sama5_pm_init(sama5_pm_modes, ARRAY_SIZE(sama5_pm_modes)); > >> } > >> > >> static const char *const sama5_dt_board_compat[] __initconst = { > >> @@ -44,10 +52,19 @@ DT_MACHINE_START(sama5_alt_dt, "Atmel SAMA5") > >> .l2c_aux_mask = ~0UL, > >> MACHINE_END > >> > >> +/* sama5d2 PM modes. */ > >> +static const int sama5d2_pm_modes[] = { > >> + AT91_PM_STANDBY, > >> + AT91_PM_ULP0, > >> + AT91_PM_ULP0_FAST, > >> + AT91_PM_ULP1, > >> + AT91_PM_BACKUP, > >> +}; > >> + > >> static void __init sama5d2_init(void) > >> { > >> of_platform_default_populate(NULL, NULL, NULL); > >> - sama5d2_pm_init(); > >> + sama5d2_pm_init(sama5d2_pm_modes, ARRAY_SIZE(sama5d2_pm_modes)); > >> } -- Alexandre Belloni, Bootlin Embedded Linux and Kernel engineering https://bootlin.com ^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH 3/3] ARM: at91: pm: put node after its usage 2020-08-03 7:25 [PATCH 0/3] AT91 PM improvements Claudiu Beznea 2020-08-03 7:25 ` [PATCH 1/3] ARM: at91: pm: add support for ulp0 fast mode Claudiu Beznea 2020-08-03 7:25 ` [PATCH 2/3] ARM: at91: pm: add per soc validation of pm modes Claudiu Beznea @ 2020-08-03 7:25 ` Claudiu Beznea 2 siblings, 0 replies; 7+ messages in thread From: Claudiu Beznea @ 2020-08-03 7:25 UTC (permalink / raw) To: nicolas.ferre, alexandre.belloni, ludovic.desroches Cc: linux-arm-kernel, linux-kernel, Claudiu Beznea of_find_matching_node_and_match() returns a node pointer with refcount incremented. Use of_node_put() after the node has been used. Fixes: 13f16017d3e3f ("ARM: at91: pm: Tie the USB clock mask to the pmc") Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> --- arch/arm/mach-at91/pm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c index caf87efc7eeb..3d2ee8273b4c 100644 --- a/arch/arm/mach-at91/pm.c +++ b/arch/arm/mach-at91/pm.c @@ -849,6 +849,7 @@ static void __init at91_pm_init(void (*pm_idle)(void)) pmc_np = of_find_matching_node_and_match(NULL, atmel_pmc_ids, &of_id); soc_pm.data.pmc = of_iomap(pmc_np, 0); + of_node_put(pmc_np); if (!soc_pm.data.pmc) { pr_err("AT91: PM not supported, PMC not found\n"); return; -- 2.7.4 ^ permalink raw reply related [flat|nested] 7+ messages in thread
end of thread, other threads:[~2020-08-03 12:52 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2020-08-03 7:25 [PATCH 0/3] AT91 PM improvements Claudiu Beznea 2020-08-03 7:25 ` [PATCH 1/3] ARM: at91: pm: add support for ulp0 fast mode Claudiu Beznea 2020-08-03 7:25 ` [PATCH 2/3] ARM: at91: pm: add per soc validation of pm modes Claudiu Beznea 2020-08-03 8:34 ` Alexandre Belloni 2020-08-03 10:54 ` Claudiu.Beznea 2020-08-03 12:51 ` Alexandre Belloni 2020-08-03 7:25 ` [PATCH 3/3] ARM: at91: pm: put node after its usage Claudiu Beznea
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