* [PATCH 0/4] ARM: at91: pm: add ULP1 mode support
@ 2016-01-28 10:19 ` Wenyou Yang
0 siblings, 0 replies; 21+ messages in thread
From: Wenyou Yang @ 2016-01-28 10:19 UTC (permalink / raw)
To: Nicolas Ferre, Alexandre Belloni,
Jean-Christophe Plagniol-Villard, Russell King
Cc: linux-clk, Rob Herring, Pawel Moll, Mark Brown, Ian Campbell,
Kumar Gala, linux-arm-kernel, linux-kernel, devicetree,
Wenyou Yang
The ULP1 (Ultra Low-power mode 1) is introduced by SAMA5D2.
In order to achieve the lowest power consumption, in the ULP1 mode,
all the clocks are shut off, inclusive the embedded 12MHz RC oscillator.
The fast startup signal is used as a wake up source for ULP1 mode.
As soon as the wake up event is asserted, the embedded 12MHz RC
oscillator restarts automatically, which fast startup signal
to trigger the PMC to wake up the system from the ULP1 mode can be
configured via DT.
It is based on the following patch set:
http://lists.infradead.org/pipermail/linux-arm-kernel/2015-December/390954.html
Wenyou Yang (4):
ARM: at91: pm: create a separate procedure for the ULP0 mode
ARM: at91: pm: add ULP1 mode support
ARM: at91: pm: configure PMC fast startup signals
Documentation: atmel-at91: add DT bindings for fast startup
.../devicetree/bindings/arm/atmel-pmc.txt | 74 +++++++++
arch/arm/mach-at91/pm.c | 112 +++++++++++++-
arch/arm/mach-at91/pm.h | 7 +
arch/arm/mach-at91/pm_suspend.S | 158 +++++++++++++++++---
include/linux/clk/at91_pmc.h | 36 +++++
5 files changed, 362 insertions(+), 25 deletions(-)
--
1.7.9.5
^ permalink raw reply [flat|nested] 21+ messages in thread
* [PATCH 0/4] ARM: at91: pm: add ULP1 mode support
@ 2016-01-28 10:19 ` Wenyou Yang
0 siblings, 0 replies; 21+ messages in thread
From: Wenyou Yang @ 2016-01-28 10:19 UTC (permalink / raw)
To: Nicolas Ferre, Alexandre Belloni,
Jean-Christophe Plagniol-Villard, Russell King
Cc: linux-clk, Rob Herring, Pawel Moll, Mark Brown, Ian Campbell,
Kumar Gala, linux-arm-kernel, linux-kernel, devicetree,
Wenyou Yang
The ULP1 (Ultra Low-power mode 1) is introduced by SAMA5D2.
In order to achieve the lowest power consumption, in the ULP1 mode,
all the clocks are shut off, inclusive the embedded 12MHz RC oscillator.
The fast startup signal is used as a wake up source for ULP1 mode.
As soon as the wake up event is asserted, the embedded 12MHz RC
oscillator restarts automatically, which fast startup signal
to trigger the PMC to wake up the system from the ULP1 mode can be
configured via DT.
It is based on the following patch set:
http://lists.infradead.org/pipermail/linux-arm-kernel/2015-December/390954.html
Wenyou Yang (4):
ARM: at91: pm: create a separate procedure for the ULP0 mode
ARM: at91: pm: add ULP1 mode support
ARM: at91: pm: configure PMC fast startup signals
Documentation: atmel-at91: add DT bindings for fast startup
.../devicetree/bindings/arm/atmel-pmc.txt | 74 +++++++++
arch/arm/mach-at91/pm.c | 112 +++++++++++++-
arch/arm/mach-at91/pm.h | 7 +
arch/arm/mach-at91/pm_suspend.S | 158 +++++++++++++++++---
include/linux/clk/at91_pmc.h | 36 +++++
5 files changed, 362 insertions(+), 25 deletions(-)
--
1.7.9.5
^ permalink raw reply [flat|nested] 21+ messages in thread
* [PATCH 0/4] ARM: at91: pm: add ULP1 mode support
@ 2016-01-28 10:19 ` Wenyou Yang
0 siblings, 0 replies; 21+ messages in thread
From: Wenyou Yang @ 2016-01-28 10:19 UTC (permalink / raw)
To: linux-arm-kernel
The ULP1 (Ultra Low-power mode 1) is introduced by SAMA5D2.
In order to achieve the lowest power consumption, in the ULP1 mode,
all the clocks are shut off, inclusive the embedded 12MHz RC oscillator.
The fast startup signal is used as a wake up source for ULP1 mode.
As soon as the wake up event is asserted, the embedded 12MHz RC
oscillator restarts automatically, which fast startup signal
to trigger the PMC to wake up the system from the ULP1 mode can be
configured via DT.
It is based on the following patch set:
http://lists.infradead.org/pipermail/linux-arm-kernel/2015-December/390954.html
Wenyou Yang (4):
ARM: at91: pm: create a separate procedure for the ULP0 mode
ARM: at91: pm: add ULP1 mode support
ARM: at91: pm: configure PMC fast startup signals
Documentation: atmel-at91: add DT bindings for fast startup
.../devicetree/bindings/arm/atmel-pmc.txt | 74 +++++++++
arch/arm/mach-at91/pm.c | 112 +++++++++++++-
arch/arm/mach-at91/pm.h | 7 +
arch/arm/mach-at91/pm_suspend.S | 158 +++++++++++++++++---
include/linux/clk/at91_pmc.h | 36 +++++
5 files changed, 362 insertions(+), 25 deletions(-)
--
1.7.9.5
^ permalink raw reply [flat|nested] 21+ messages in thread
* [PATCH 1/4] ARM: at91: pm: create a separate procedure for the ULP0 mode
2016-01-28 10:19 ` Wenyou Yang
(?)
@ 2016-01-28 10:19 ` Wenyou Yang
-1 siblings, 0 replies; 21+ messages in thread
From: Wenyou Yang @ 2016-01-28 10:19 UTC (permalink / raw)
To: Nicolas Ferre, Alexandre Belloni,
Jean-Christophe Plagniol-Villard, Russell King
Cc: linux-clk, Rob Herring, Pawel Moll, Mark Brown, Ian Campbell,
Kumar Gala, linux-arm-kernel, linux-kernel, devicetree,
Wenyou Yang
To make the code more legible and prepare to add the ULP1 mode
support in the future, create a separate procedure for the ULP0 mode.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
---
arch/arm/mach-at91/pm_suspend.S | 65 ++++++++++++++++++++++++---------------
1 file changed, 40 insertions(+), 25 deletions(-)
diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
index a25defd..5fcffdc 100644
--- a/arch/arm/mach-at91/pm_suspend.S
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -107,7 +107,7 @@ ENTRY(at91_pm_suspend_in_sram)
ldr r0, .pm_mode
tst r0, #AT91_PM_SLOW_CLOCK
- beq skip_disable_main_clock
+ beq standby_mode
ldr pmc, .pmc_base
@@ -131,32 +131,13 @@ ENTRY(at91_pm_suspend_in_sram)
orr tmp1, tmp1, #(1 << 29) /* bit 29 always set */
str tmp1, [pmc, #AT91_CKGR_PLLAR]
- /* Turn off the main oscillator */
- ldr tmp1, [pmc, #AT91_CKGR_MOR]
- bic tmp1, tmp1, #AT91_PMC_MOSCEN
- orr tmp1, tmp1, #AT91_PMC_KEY
- str tmp1, [pmc, #AT91_CKGR_MOR]
-
-skip_disable_main_clock:
- ldr pmc, .pmc_base
-
- /* Wait for interrupt */
- at91_cpu_idle
-
- ldr r0, .pm_mode
- tst r0, #AT91_PM_SLOW_CLOCK
- beq skip_enable_main_clock
+ulp0_mode:
+ bl at91_pm_ulp0_mode
+ b ulp_exit
+ulp_exit:
ldr pmc, .pmc_base
- /* Turn on the main oscillator */
- ldr tmp1, [pmc, #AT91_CKGR_MOR]
- orr tmp1, tmp1, #AT91_PMC_MOSCEN
- orr tmp1, tmp1, #AT91_PMC_KEY
- str tmp1, [pmc, #AT91_CKGR_MOR]
-
- wait_moscrdy
-
/* Restore PLLA setting */
ldr tmp1, .saved_pllar
str tmp1, [pmc, #AT91_CKGR_PLLAR]
@@ -177,7 +158,15 @@ skip_disable_main_clock:
wait_mckrdy
-skip_enable_main_clock:
+ b pm_exit
+
+standby_mode:
+ ldr pmc, .pmc_base
+
+ /* Wait for interrupt */
+ at91_cpu_idle
+
+pm_exit:
/* Exit the self-refresh mode */
mov r0, #SRAMC_SELF_FRESH_EXIT
bl at91_sramc_self_refresh
@@ -311,6 +300,32 @@ exit_sramc_sf:
mov pc, lr
ENDPROC(at91_sramc_self_refresh)
+/*
+ * void at91_pm_ulp0_mode(void)
+ */
+ENTRY(at91_pm_ulp0_mode)
+ ldr pmc, .pmc_base
+
+ /* Turn off the crystal oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ bic tmp1, tmp1, #AT91_PMC_MOSCEN
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ /* Wait for interrupt */
+ at91_cpu_idle
+
+ /* Turn on the crystal oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ orr tmp1, tmp1, #AT91_PMC_MOSCEN
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ wait_moscrdy
+
+ mov pc, lr
+ENDPROC(at91_pm_ulp0_mode)
+
.pmc_base:
.word 0
.sramc_base:
--
1.7.9.5
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [PATCH 1/4] ARM: at91: pm: create a separate procedure for the ULP0 mode
@ 2016-01-28 10:19 ` Wenyou Yang
0 siblings, 0 replies; 21+ messages in thread
From: Wenyou Yang @ 2016-01-28 10:19 UTC (permalink / raw)
To: Nicolas Ferre, Alexandre Belloni,
Jean-Christophe Plagniol-Villard, Russell King
Cc: linux-clk, Rob Herring, Pawel Moll, Mark Brown, Ian Campbell,
Kumar Gala, linux-arm-kernel, linux-kernel, devicetree,
Wenyou Yang
To make the code more legible and prepare to add the ULP1 mode
support in the future, create a separate procedure for the ULP0 mode.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
---
arch/arm/mach-at91/pm_suspend.S | 65 ++++++++++++++++++++++++---------------
1 file changed, 40 insertions(+), 25 deletions(-)
diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
index a25defd..5fcffdc 100644
--- a/arch/arm/mach-at91/pm_suspend.S
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -107,7 +107,7 @@ ENTRY(at91_pm_suspend_in_sram)
ldr r0, .pm_mode
tst r0, #AT91_PM_SLOW_CLOCK
- beq skip_disable_main_clock
+ beq standby_mode
ldr pmc, .pmc_base
@@ -131,32 +131,13 @@ ENTRY(at91_pm_suspend_in_sram)
orr tmp1, tmp1, #(1 << 29) /* bit 29 always set */
str tmp1, [pmc, #AT91_CKGR_PLLAR]
- /* Turn off the main oscillator */
- ldr tmp1, [pmc, #AT91_CKGR_MOR]
- bic tmp1, tmp1, #AT91_PMC_MOSCEN
- orr tmp1, tmp1, #AT91_PMC_KEY
- str tmp1, [pmc, #AT91_CKGR_MOR]
-
-skip_disable_main_clock:
- ldr pmc, .pmc_base
-
- /* Wait for interrupt */
- at91_cpu_idle
-
- ldr r0, .pm_mode
- tst r0, #AT91_PM_SLOW_CLOCK
- beq skip_enable_main_clock
+ulp0_mode:
+ bl at91_pm_ulp0_mode
+ b ulp_exit
+ulp_exit:
ldr pmc, .pmc_base
- /* Turn on the main oscillator */
- ldr tmp1, [pmc, #AT91_CKGR_MOR]
- orr tmp1, tmp1, #AT91_PMC_MOSCEN
- orr tmp1, tmp1, #AT91_PMC_KEY
- str tmp1, [pmc, #AT91_CKGR_MOR]
-
- wait_moscrdy
-
/* Restore PLLA setting */
ldr tmp1, .saved_pllar
str tmp1, [pmc, #AT91_CKGR_PLLAR]
@@ -177,7 +158,15 @@ skip_disable_main_clock:
wait_mckrdy
-skip_enable_main_clock:
+ b pm_exit
+
+standby_mode:
+ ldr pmc, .pmc_base
+
+ /* Wait for interrupt */
+ at91_cpu_idle
+
+pm_exit:
/* Exit the self-refresh mode */
mov r0, #SRAMC_SELF_FRESH_EXIT
bl at91_sramc_self_refresh
@@ -311,6 +300,32 @@ exit_sramc_sf:
mov pc, lr
ENDPROC(at91_sramc_self_refresh)
+/*
+ * void at91_pm_ulp0_mode(void)
+ */
+ENTRY(at91_pm_ulp0_mode)
+ ldr pmc, .pmc_base
+
+ /* Turn off the crystal oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ bic tmp1, tmp1, #AT91_PMC_MOSCEN
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ /* Wait for interrupt */
+ at91_cpu_idle
+
+ /* Turn on the crystal oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ orr tmp1, tmp1, #AT91_PMC_MOSCEN
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ wait_moscrdy
+
+ mov pc, lr
+ENDPROC(at91_pm_ulp0_mode)
+
.pmc_base:
.word 0
.sramc_base:
--
1.7.9.5
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [PATCH 1/4] ARM: at91: pm: create a separate procedure for the ULP0 mode
@ 2016-01-28 10:19 ` Wenyou Yang
0 siblings, 0 replies; 21+ messages in thread
From: Wenyou Yang @ 2016-01-28 10:19 UTC (permalink / raw)
To: linux-arm-kernel
To make the code more legible and prepare to add the ULP1 mode
support in the future, create a separate procedure for the ULP0 mode.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
---
arch/arm/mach-at91/pm_suspend.S | 65 ++++++++++++++++++++++++---------------
1 file changed, 40 insertions(+), 25 deletions(-)
diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
index a25defd..5fcffdc 100644
--- a/arch/arm/mach-at91/pm_suspend.S
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -107,7 +107,7 @@ ENTRY(at91_pm_suspend_in_sram)
ldr r0, .pm_mode
tst r0, #AT91_PM_SLOW_CLOCK
- beq skip_disable_main_clock
+ beq standby_mode
ldr pmc, .pmc_base
@@ -131,32 +131,13 @@ ENTRY(at91_pm_suspend_in_sram)
orr tmp1, tmp1, #(1 << 29) /* bit 29 always set */
str tmp1, [pmc, #AT91_CKGR_PLLAR]
- /* Turn off the main oscillator */
- ldr tmp1, [pmc, #AT91_CKGR_MOR]
- bic tmp1, tmp1, #AT91_PMC_MOSCEN
- orr tmp1, tmp1, #AT91_PMC_KEY
- str tmp1, [pmc, #AT91_CKGR_MOR]
-
-skip_disable_main_clock:
- ldr pmc, .pmc_base
-
- /* Wait for interrupt */
- at91_cpu_idle
-
- ldr r0, .pm_mode
- tst r0, #AT91_PM_SLOW_CLOCK
- beq skip_enable_main_clock
+ulp0_mode:
+ bl at91_pm_ulp0_mode
+ b ulp_exit
+ulp_exit:
ldr pmc, .pmc_base
- /* Turn on the main oscillator */
- ldr tmp1, [pmc, #AT91_CKGR_MOR]
- orr tmp1, tmp1, #AT91_PMC_MOSCEN
- orr tmp1, tmp1, #AT91_PMC_KEY
- str tmp1, [pmc, #AT91_CKGR_MOR]
-
- wait_moscrdy
-
/* Restore PLLA setting */
ldr tmp1, .saved_pllar
str tmp1, [pmc, #AT91_CKGR_PLLAR]
@@ -177,7 +158,15 @@ skip_disable_main_clock:
wait_mckrdy
-skip_enable_main_clock:
+ b pm_exit
+
+standby_mode:
+ ldr pmc, .pmc_base
+
+ /* Wait for interrupt */
+ at91_cpu_idle
+
+pm_exit:
/* Exit the self-refresh mode */
mov r0, #SRAMC_SELF_FRESH_EXIT
bl at91_sramc_self_refresh
@@ -311,6 +300,32 @@ exit_sramc_sf:
mov pc, lr
ENDPROC(at91_sramc_self_refresh)
+/*
+ * void at91_pm_ulp0_mode(void)
+ */
+ENTRY(at91_pm_ulp0_mode)
+ ldr pmc, .pmc_base
+
+ /* Turn off the crystal oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ bic tmp1, tmp1, #AT91_PMC_MOSCEN
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ /* Wait for interrupt */
+ at91_cpu_idle
+
+ /* Turn on the crystal oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ orr tmp1, tmp1, #AT91_PMC_MOSCEN
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ wait_moscrdy
+
+ mov pc, lr
+ENDPROC(at91_pm_ulp0_mode)
+
.pmc_base:
.word 0
.sramc_base:
--
1.7.9.5
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [PATCH 2/4] ARM: at91: pm: add ULP1 mode support
@ 2016-01-28 10:19 ` Wenyou Yang
0 siblings, 0 replies; 21+ messages in thread
From: Wenyou Yang @ 2016-01-28 10:19 UTC (permalink / raw)
To: Nicolas Ferre, Alexandre Belloni,
Jean-Christophe Plagniol-Villard, Russell King
Cc: linux-clk, Rob Herring, Pawel Moll, Mark Brown, Ian Campbell,
Kumar Gala, linux-arm-kernel, linux-kernel, devicetree,
Wenyou Yang
The ULP1 (Ultra Low-power mode 1) is introduced by SAMA5D2.
In the ULP1 mode, all the clocks are shut off, inclusive the embedded
12MHz RC oscillator, so as to achieve the lowest power consumption
with the system in retention mode and able to resume on the wake up
events. As soon as the wake up event is asserted, the embedded 12MHz
RC oscillator restarts automatically.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
---
arch/arm/mach-at91/pm.c | 16 ++++++-
arch/arm/mach-at91/pm.h | 7 +++
arch/arm/mach-at91/pm_suspend.S | 97 +++++++++++++++++++++++++++++++++++++++
include/linux/clk/at91_pmc.h | 4 ++
4 files changed, 122 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index f82df15..a7aec35 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -36,6 +36,11 @@
#include "generic.h"
#include "pm.h"
+#define ULP0_MODE 0x00
+#define ULP1_MODE 0x11
+
+#define SAMA5D2_PMC_VERSION 0x20540
+
void __iomem *pmc;
/*
@@ -52,6 +57,7 @@ extern void at91_pinctrl_gpio_resume(void);
static struct {
unsigned long uhp_udp_mask;
int memctrl;
+ u32 ulp_mode;
} at91_pm_data;
void __iomem *at91_ramc_base[2];
@@ -141,8 +147,11 @@ static void at91_pm_suspend(suspend_state_t state)
{
unsigned int pm_data = at91_pm_data.memctrl;
- pm_data |= (state == PM_SUSPEND_MEM) ?
- AT91_PM_MODE(AT91_PM_SLOW_CLOCK) : 0;
+ if (state == PM_SUSPEND_MEM) {
+ pm_data |= AT91_PM_MODE(AT91_PM_SLOW_CLOCK);
+ if (at91_pm_data.ulp_mode == ULP1_MODE)
+ pm_data |= AT91_PM_ULP(AT91_PM_ULP1_MODE);
+ }
flush_cache_all();
outer_disable();
@@ -497,4 +506,7 @@ void __init sama5_pm_init(void)
at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
at91_pm_init(NULL);
+
+ if (readl(pmc + AT91_PMC_VERSION) >= SAMA5D2_PMC_VERSION)
+ at91_pm_data.ulp_mode = ULP1_MODE;
}
diff --git a/arch/arm/mach-at91/pm.h b/arch/arm/mach-at91/pm.h
index 3fcf881..2e76745 100644
--- a/arch/arm/mach-at91/pm.h
+++ b/arch/arm/mach-at91/pm.h
@@ -39,4 +39,11 @@ extern void __iomem *at91_ramc_base[];
#define AT91_PM_SLOW_CLOCK 0x01
+#define AT91_PM_ULP_OFFSET 5
+#define AT91_PM_ULP_MASK 0x03
+#define AT91_PM_ULP(x) (((x) & AT91_PM_ULP_MASK) << AT91_PM_ULP_OFFSET)
+
+#define AT91_PM_ULP0_MODE 0x00
+#define AT91_PM_ULP1_MODE 0x01
+
#endif
diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
index 5fcffdc..20f4303 100644
--- a/arch/arm/mach-at91/pm_suspend.S
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -41,6 +41,15 @@ tmp2 .req r5
.endm
/*
+ * Wait for main oscillator selection is done
+ */
+ .macro wait_moscsels
+1: ldr tmp1, [pmc, #AT91_PMC_SR]
+ tst tmp1, #AT91_PMC_MOSCSELS
+ beq 1b
+ .endm
+
+/*
* Wait until PLLA has locked.
*/
.macro wait_pllalock
@@ -101,6 +110,10 @@ ENTRY(at91_pm_suspend_in_sram)
and r0, r0, #AT91_PM_MODE_MASK
str r0, .pm_mode
+ lsr r0, r3, #AT91_PM_ULP_OFFSET
+ and r0, r0, #AT91_PM_ULP_MASK
+ str r0, .ulp_mode
+
/* Active the self-refresh mode */
mov r0, #SRAMC_SELF_FRESH_ACTIVE
bl at91_sramc_self_refresh
@@ -131,6 +144,13 @@ ENTRY(at91_pm_suspend_in_sram)
orr tmp1, tmp1, #(1 << 29) /* bit 29 always set */
str tmp1, [pmc, #AT91_CKGR_PLLAR]
+ ldr r0, .ulp_mode
+ tst r0, #AT91_PM_ULP1_MODE
+ beq ulp0_mode
+
+ bl at91_pm_ulp1_mode
+ b pm_exit
+
ulp0_mode:
bl at91_pm_ulp0_mode
b ulp_exit
@@ -326,6 +346,81 @@ ENTRY(at91_pm_ulp0_mode)
mov pc, lr
ENDPROC(at91_pm_ulp0_mode)
+/*
+ * void at91_pm_ulp1_mode(void)
+ */
+ENTRY(at91_pm_ulp1_mode)
+ ldr pmc, .pmc_base
+
+ /* Switch the main clock source to 12-MHz RC oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ bic tmp1, tmp1, #AT91_PMC_MOSCSEL
+ bic tmp1, tmp1, #AT91_PMC_KEY_MASK
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ wait_moscsels
+
+ /* Disable the crystal oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ bic tmp1, tmp1, #AT91_PMC_MOSCEN
+ bic tmp1, tmp1, #AT91_PMC_KEY_MASK
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ /* Switch the master clock source to main clock */
+ ldr tmp1, [pmc, #AT91_PMC_MCKR]
+ bic tmp1, tmp1, #AT91_PMC_CSS
+ orr tmp1, tmp1, #AT91_PMC_CSS_MAIN
+ str tmp1, [pmc, #AT91_PMC_MCKR]
+
+ wait_mckrdy
+
+ /* Enter the ULP1 mode by set WAITMODE bit in CKGR_MOR */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ orr tmp1, tmp1, #AT91_PMC_WAITMODE
+ bic tmp1, tmp1, #AT91_PMC_KEY_MASK
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ wait_mckrdy
+
+ /* Enable the crystal oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ orr tmp1, tmp1, #AT91_PMC_MOSCEN
+ bic tmp1, tmp1, #AT91_PMC_KEY_MASK
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ wait_moscrdy
+
+ /* Switch the master clock source to slow clock */
+ ldr tmp1, [pmc, #AT91_PMC_MCKR]
+ bic tmp1, tmp1, #AT91_PMC_CSS
+ str tmp1, [pmc, #AT91_PMC_MCKR]
+
+ wait_mckrdy
+
+ /* Switch main clock source to crystal oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ orr tmp1, tmp1, #AT91_PMC_MOSCSEL
+ bic tmp1, tmp1, #AT91_PMC_KEY_MASK
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ wait_moscsels
+
+ /* Switch the master clock source to main clock */
+ ldr tmp1, [pmc, #AT91_PMC_MCKR]
+ bic tmp1, tmp1, #AT91_PMC_CSS
+ orr tmp1, tmp1, #AT91_PMC_CSS_MAIN
+ str tmp1, [pmc, #AT91_PMC_MCKR]
+
+ wait_mckrdy
+
+ mov pc, lr
+ENDPROC(at91_pm_ulp1_mode)
+
.pmc_base:
.word 0
.sramc_base:
@@ -336,6 +431,8 @@ ENDPROC(at91_pm_ulp0_mode)
.word 0
.pm_mode:
.word 0
+.ulp_mode:
+ .word 0
.saved_mckr:
.word 0
.saved_pllar:
diff --git a/include/linux/clk/at91_pmc.h b/include/linux/clk/at91_pmc.h
index 17f413b..4afd891 100644
--- a/include/linux/clk/at91_pmc.h
+++ b/include/linux/clk/at91_pmc.h
@@ -47,8 +47,10 @@
#define AT91_CKGR_MOR 0x20 /* Main Oscillator Register [not on SAM9RL] */
#define AT91_PMC_MOSCEN (1 << 0) /* Main Oscillator Enable */
#define AT91_PMC_OSCBYPASS (1 << 1) /* Oscillator Bypass */
+#define AT91_PMC_WAITMODE (1 << 2) /* Wait Mode Command */
#define AT91_PMC_MOSCRCEN (1 << 3) /* Main On-Chip RC Oscillator Enable [some SAM9] */
#define AT91_PMC_OSCOUNT (0xff << 8) /* Main Oscillator Start-up Time */
+#define AT91_PMC_KEY_MASK (0xff << 16)
#define AT91_PMC_KEY (0x37 << 16) /* MOR Writing Key */
#define AT91_PMC_MOSCSEL (1 << 24) /* Main Oscillator Selection [some SAM9] */
#define AT91_PMC_CFDEN (1 << 25) /* Clock Failure Detector Enable [some SAM9] */
@@ -166,6 +168,8 @@
#define AT91_PMC_WPVS (0x1 << 0) /* Write Protect Violation Status */
#define AT91_PMC_WPVSRC (0xffff << 8) /* Write Protect Violation Source */
+#define AT91_PMC_VERSION 0xfc
+
#define AT91_PMC_PCER1 0x100 /* Peripheral Clock Enable Register 1 [SAMA5 only]*/
#define AT91_PMC_PCDR1 0x104 /* Peripheral Clock Enable Register 1 */
#define AT91_PMC_PCSR1 0x108 /* Peripheral Clock Enable Register 1 */
--
1.7.9.5
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [PATCH 2/4] ARM: at91: pm: add ULP1 mode support
@ 2016-01-28 10:19 ` Wenyou Yang
0 siblings, 0 replies; 21+ messages in thread
From: Wenyou Yang @ 2016-01-28 10:19 UTC (permalink / raw)
To: Nicolas Ferre, Alexandre Belloni,
Jean-Christophe Plagniol-Villard, Russell King
Cc: linux-clk-u79uwXL29TY76Z2rM5mHXA, Rob Herring, Pawel Moll,
Mark Brown, Ian Campbell, Kumar Gala,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-kernel-u79uwXL29TY76Z2rM5mHXA,
devicetree-u79uwXL29TY76Z2rM5mHXA, Wenyou Yang
The ULP1 (Ultra Low-power mode 1) is introduced by SAMA5D2.
In the ULP1 mode, all the clocks are shut off, inclusive the embedded
12MHz RC oscillator, so as to achieve the lowest power consumption
with the system in retention mode and able to resume on the wake up
events. As soon as the wake up event is asserted, the embedded 12MHz
RC oscillator restarts automatically.
Signed-off-by: Wenyou Yang <wenyou.yang-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
---
arch/arm/mach-at91/pm.c | 16 ++++++-
arch/arm/mach-at91/pm.h | 7 +++
arch/arm/mach-at91/pm_suspend.S | 97 +++++++++++++++++++++++++++++++++++++++
include/linux/clk/at91_pmc.h | 4 ++
4 files changed, 122 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index f82df15..a7aec35 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -36,6 +36,11 @@
#include "generic.h"
#include "pm.h"
+#define ULP0_MODE 0x00
+#define ULP1_MODE 0x11
+
+#define SAMA5D2_PMC_VERSION 0x20540
+
void __iomem *pmc;
/*
@@ -52,6 +57,7 @@ extern void at91_pinctrl_gpio_resume(void);
static struct {
unsigned long uhp_udp_mask;
int memctrl;
+ u32 ulp_mode;
} at91_pm_data;
void __iomem *at91_ramc_base[2];
@@ -141,8 +147,11 @@ static void at91_pm_suspend(suspend_state_t state)
{
unsigned int pm_data = at91_pm_data.memctrl;
- pm_data |= (state == PM_SUSPEND_MEM) ?
- AT91_PM_MODE(AT91_PM_SLOW_CLOCK) : 0;
+ if (state == PM_SUSPEND_MEM) {
+ pm_data |= AT91_PM_MODE(AT91_PM_SLOW_CLOCK);
+ if (at91_pm_data.ulp_mode == ULP1_MODE)
+ pm_data |= AT91_PM_ULP(AT91_PM_ULP1_MODE);
+ }
flush_cache_all();
outer_disable();
@@ -497,4 +506,7 @@ void __init sama5_pm_init(void)
at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
at91_pm_init(NULL);
+
+ if (readl(pmc + AT91_PMC_VERSION) >= SAMA5D2_PMC_VERSION)
+ at91_pm_data.ulp_mode = ULP1_MODE;
}
diff --git a/arch/arm/mach-at91/pm.h b/arch/arm/mach-at91/pm.h
index 3fcf881..2e76745 100644
--- a/arch/arm/mach-at91/pm.h
+++ b/arch/arm/mach-at91/pm.h
@@ -39,4 +39,11 @@ extern void __iomem *at91_ramc_base[];
#define AT91_PM_SLOW_CLOCK 0x01
+#define AT91_PM_ULP_OFFSET 5
+#define AT91_PM_ULP_MASK 0x03
+#define AT91_PM_ULP(x) (((x) & AT91_PM_ULP_MASK) << AT91_PM_ULP_OFFSET)
+
+#define AT91_PM_ULP0_MODE 0x00
+#define AT91_PM_ULP1_MODE 0x01
+
#endif
diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
index 5fcffdc..20f4303 100644
--- a/arch/arm/mach-at91/pm_suspend.S
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -41,6 +41,15 @@ tmp2 .req r5
.endm
/*
+ * Wait for main oscillator selection is done
+ */
+ .macro wait_moscsels
+1: ldr tmp1, [pmc, #AT91_PMC_SR]
+ tst tmp1, #AT91_PMC_MOSCSELS
+ beq 1b
+ .endm
+
+/*
* Wait until PLLA has locked.
*/
.macro wait_pllalock
@@ -101,6 +110,10 @@ ENTRY(at91_pm_suspend_in_sram)
and r0, r0, #AT91_PM_MODE_MASK
str r0, .pm_mode
+ lsr r0, r3, #AT91_PM_ULP_OFFSET
+ and r0, r0, #AT91_PM_ULP_MASK
+ str r0, .ulp_mode
+
/* Active the self-refresh mode */
mov r0, #SRAMC_SELF_FRESH_ACTIVE
bl at91_sramc_self_refresh
@@ -131,6 +144,13 @@ ENTRY(at91_pm_suspend_in_sram)
orr tmp1, tmp1, #(1 << 29) /* bit 29 always set */
str tmp1, [pmc, #AT91_CKGR_PLLAR]
+ ldr r0, .ulp_mode
+ tst r0, #AT91_PM_ULP1_MODE
+ beq ulp0_mode
+
+ bl at91_pm_ulp1_mode
+ b pm_exit
+
ulp0_mode:
bl at91_pm_ulp0_mode
b ulp_exit
@@ -326,6 +346,81 @@ ENTRY(at91_pm_ulp0_mode)
mov pc, lr
ENDPROC(at91_pm_ulp0_mode)
+/*
+ * void at91_pm_ulp1_mode(void)
+ */
+ENTRY(at91_pm_ulp1_mode)
+ ldr pmc, .pmc_base
+
+ /* Switch the main clock source to 12-MHz RC oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ bic tmp1, tmp1, #AT91_PMC_MOSCSEL
+ bic tmp1, tmp1, #AT91_PMC_KEY_MASK
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ wait_moscsels
+
+ /* Disable the crystal oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ bic tmp1, tmp1, #AT91_PMC_MOSCEN
+ bic tmp1, tmp1, #AT91_PMC_KEY_MASK
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ /* Switch the master clock source to main clock */
+ ldr tmp1, [pmc, #AT91_PMC_MCKR]
+ bic tmp1, tmp1, #AT91_PMC_CSS
+ orr tmp1, tmp1, #AT91_PMC_CSS_MAIN
+ str tmp1, [pmc, #AT91_PMC_MCKR]
+
+ wait_mckrdy
+
+ /* Enter the ULP1 mode by set WAITMODE bit in CKGR_MOR */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ orr tmp1, tmp1, #AT91_PMC_WAITMODE
+ bic tmp1, tmp1, #AT91_PMC_KEY_MASK
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ wait_mckrdy
+
+ /* Enable the crystal oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ orr tmp1, tmp1, #AT91_PMC_MOSCEN
+ bic tmp1, tmp1, #AT91_PMC_KEY_MASK
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ wait_moscrdy
+
+ /* Switch the master clock source to slow clock */
+ ldr tmp1, [pmc, #AT91_PMC_MCKR]
+ bic tmp1, tmp1, #AT91_PMC_CSS
+ str tmp1, [pmc, #AT91_PMC_MCKR]
+
+ wait_mckrdy
+
+ /* Switch main clock source to crystal oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ orr tmp1, tmp1, #AT91_PMC_MOSCSEL
+ bic tmp1, tmp1, #AT91_PMC_KEY_MASK
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ wait_moscsels
+
+ /* Switch the master clock source to main clock */
+ ldr tmp1, [pmc, #AT91_PMC_MCKR]
+ bic tmp1, tmp1, #AT91_PMC_CSS
+ orr tmp1, tmp1, #AT91_PMC_CSS_MAIN
+ str tmp1, [pmc, #AT91_PMC_MCKR]
+
+ wait_mckrdy
+
+ mov pc, lr
+ENDPROC(at91_pm_ulp1_mode)
+
.pmc_base:
.word 0
.sramc_base:
@@ -336,6 +431,8 @@ ENDPROC(at91_pm_ulp0_mode)
.word 0
.pm_mode:
.word 0
+.ulp_mode:
+ .word 0
.saved_mckr:
.word 0
.saved_pllar:
diff --git a/include/linux/clk/at91_pmc.h b/include/linux/clk/at91_pmc.h
index 17f413b..4afd891 100644
--- a/include/linux/clk/at91_pmc.h
+++ b/include/linux/clk/at91_pmc.h
@@ -47,8 +47,10 @@
#define AT91_CKGR_MOR 0x20 /* Main Oscillator Register [not on SAM9RL] */
#define AT91_PMC_MOSCEN (1 << 0) /* Main Oscillator Enable */
#define AT91_PMC_OSCBYPASS (1 << 1) /* Oscillator Bypass */
+#define AT91_PMC_WAITMODE (1 << 2) /* Wait Mode Command */
#define AT91_PMC_MOSCRCEN (1 << 3) /* Main On-Chip RC Oscillator Enable [some SAM9] */
#define AT91_PMC_OSCOUNT (0xff << 8) /* Main Oscillator Start-up Time */
+#define AT91_PMC_KEY_MASK (0xff << 16)
#define AT91_PMC_KEY (0x37 << 16) /* MOR Writing Key */
#define AT91_PMC_MOSCSEL (1 << 24) /* Main Oscillator Selection [some SAM9] */
#define AT91_PMC_CFDEN (1 << 25) /* Clock Failure Detector Enable [some SAM9] */
@@ -166,6 +168,8 @@
#define AT91_PMC_WPVS (0x1 << 0) /* Write Protect Violation Status */
#define AT91_PMC_WPVSRC (0xffff << 8) /* Write Protect Violation Source */
+#define AT91_PMC_VERSION 0xfc
+
#define AT91_PMC_PCER1 0x100 /* Peripheral Clock Enable Register 1 [SAMA5 only]*/
#define AT91_PMC_PCDR1 0x104 /* Peripheral Clock Enable Register 1 */
#define AT91_PMC_PCSR1 0x108 /* Peripheral Clock Enable Register 1 */
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [PATCH 2/4] ARM: at91: pm: add ULP1 mode support
@ 2016-01-28 10:19 ` Wenyou Yang
0 siblings, 0 replies; 21+ messages in thread
From: Wenyou Yang @ 2016-01-28 10:19 UTC (permalink / raw)
To: linux-arm-kernel
The ULP1 (Ultra Low-power mode 1) is introduced by SAMA5D2.
In the ULP1 mode, all the clocks are shut off, inclusive the embedded
12MHz RC oscillator, so as to achieve the lowest power consumption
with the system in retention mode and able to resume on the wake up
events. As soon as the wake up event is asserted, the embedded 12MHz
RC oscillator restarts automatically.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
---
arch/arm/mach-at91/pm.c | 16 ++++++-
arch/arm/mach-at91/pm.h | 7 +++
arch/arm/mach-at91/pm_suspend.S | 97 +++++++++++++++++++++++++++++++++++++++
include/linux/clk/at91_pmc.h | 4 ++
4 files changed, 122 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index f82df15..a7aec35 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -36,6 +36,11 @@
#include "generic.h"
#include "pm.h"
+#define ULP0_MODE 0x00
+#define ULP1_MODE 0x11
+
+#define SAMA5D2_PMC_VERSION 0x20540
+
void __iomem *pmc;
/*
@@ -52,6 +57,7 @@ extern void at91_pinctrl_gpio_resume(void);
static struct {
unsigned long uhp_udp_mask;
int memctrl;
+ u32 ulp_mode;
} at91_pm_data;
void __iomem *at91_ramc_base[2];
@@ -141,8 +147,11 @@ static void at91_pm_suspend(suspend_state_t state)
{
unsigned int pm_data = at91_pm_data.memctrl;
- pm_data |= (state == PM_SUSPEND_MEM) ?
- AT91_PM_MODE(AT91_PM_SLOW_CLOCK) : 0;
+ if (state == PM_SUSPEND_MEM) {
+ pm_data |= AT91_PM_MODE(AT91_PM_SLOW_CLOCK);
+ if (at91_pm_data.ulp_mode == ULP1_MODE)
+ pm_data |= AT91_PM_ULP(AT91_PM_ULP1_MODE);
+ }
flush_cache_all();
outer_disable();
@@ -497,4 +506,7 @@ void __init sama5_pm_init(void)
at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP;
at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR;
at91_pm_init(NULL);
+
+ if (readl(pmc + AT91_PMC_VERSION) >= SAMA5D2_PMC_VERSION)
+ at91_pm_data.ulp_mode = ULP1_MODE;
}
diff --git a/arch/arm/mach-at91/pm.h b/arch/arm/mach-at91/pm.h
index 3fcf881..2e76745 100644
--- a/arch/arm/mach-at91/pm.h
+++ b/arch/arm/mach-at91/pm.h
@@ -39,4 +39,11 @@ extern void __iomem *at91_ramc_base[];
#define AT91_PM_SLOW_CLOCK 0x01
+#define AT91_PM_ULP_OFFSET 5
+#define AT91_PM_ULP_MASK 0x03
+#define AT91_PM_ULP(x) (((x) & AT91_PM_ULP_MASK) << AT91_PM_ULP_OFFSET)
+
+#define AT91_PM_ULP0_MODE 0x00
+#define AT91_PM_ULP1_MODE 0x01
+
#endif
diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
index 5fcffdc..20f4303 100644
--- a/arch/arm/mach-at91/pm_suspend.S
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -41,6 +41,15 @@ tmp2 .req r5
.endm
/*
+ * Wait for main oscillator selection is done
+ */
+ .macro wait_moscsels
+1: ldr tmp1, [pmc, #AT91_PMC_SR]
+ tst tmp1, #AT91_PMC_MOSCSELS
+ beq 1b
+ .endm
+
+/*
* Wait until PLLA has locked.
*/
.macro wait_pllalock
@@ -101,6 +110,10 @@ ENTRY(at91_pm_suspend_in_sram)
and r0, r0, #AT91_PM_MODE_MASK
str r0, .pm_mode
+ lsr r0, r3, #AT91_PM_ULP_OFFSET
+ and r0, r0, #AT91_PM_ULP_MASK
+ str r0, .ulp_mode
+
/* Active the self-refresh mode */
mov r0, #SRAMC_SELF_FRESH_ACTIVE
bl at91_sramc_self_refresh
@@ -131,6 +144,13 @@ ENTRY(at91_pm_suspend_in_sram)
orr tmp1, tmp1, #(1 << 29) /* bit 29 always set */
str tmp1, [pmc, #AT91_CKGR_PLLAR]
+ ldr r0, .ulp_mode
+ tst r0, #AT91_PM_ULP1_MODE
+ beq ulp0_mode
+
+ bl at91_pm_ulp1_mode
+ b pm_exit
+
ulp0_mode:
bl at91_pm_ulp0_mode
b ulp_exit
@@ -326,6 +346,81 @@ ENTRY(at91_pm_ulp0_mode)
mov pc, lr
ENDPROC(at91_pm_ulp0_mode)
+/*
+ * void at91_pm_ulp1_mode(void)
+ */
+ENTRY(at91_pm_ulp1_mode)
+ ldr pmc, .pmc_base
+
+ /* Switch the main clock source to 12-MHz RC oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ bic tmp1, tmp1, #AT91_PMC_MOSCSEL
+ bic tmp1, tmp1, #AT91_PMC_KEY_MASK
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ wait_moscsels
+
+ /* Disable the crystal oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ bic tmp1, tmp1, #AT91_PMC_MOSCEN
+ bic tmp1, tmp1, #AT91_PMC_KEY_MASK
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ /* Switch the master clock source to main clock */
+ ldr tmp1, [pmc, #AT91_PMC_MCKR]
+ bic tmp1, tmp1, #AT91_PMC_CSS
+ orr tmp1, tmp1, #AT91_PMC_CSS_MAIN
+ str tmp1, [pmc, #AT91_PMC_MCKR]
+
+ wait_mckrdy
+
+ /* Enter the ULP1 mode by set WAITMODE bit in CKGR_MOR */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ orr tmp1, tmp1, #AT91_PMC_WAITMODE
+ bic tmp1, tmp1, #AT91_PMC_KEY_MASK
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ wait_mckrdy
+
+ /* Enable the crystal oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ orr tmp1, tmp1, #AT91_PMC_MOSCEN
+ bic tmp1, tmp1, #AT91_PMC_KEY_MASK
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ wait_moscrdy
+
+ /* Switch the master clock source to slow clock */
+ ldr tmp1, [pmc, #AT91_PMC_MCKR]
+ bic tmp1, tmp1, #AT91_PMC_CSS
+ str tmp1, [pmc, #AT91_PMC_MCKR]
+
+ wait_mckrdy
+
+ /* Switch main clock source to crystal oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ orr tmp1, tmp1, #AT91_PMC_MOSCSEL
+ bic tmp1, tmp1, #AT91_PMC_KEY_MASK
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ wait_moscsels
+
+ /* Switch the master clock source to main clock */
+ ldr tmp1, [pmc, #AT91_PMC_MCKR]
+ bic tmp1, tmp1, #AT91_PMC_CSS
+ orr tmp1, tmp1, #AT91_PMC_CSS_MAIN
+ str tmp1, [pmc, #AT91_PMC_MCKR]
+
+ wait_mckrdy
+
+ mov pc, lr
+ENDPROC(at91_pm_ulp1_mode)
+
.pmc_base:
.word 0
.sramc_base:
@@ -336,6 +431,8 @@ ENDPROC(at91_pm_ulp0_mode)
.word 0
.pm_mode:
.word 0
+.ulp_mode:
+ .word 0
.saved_mckr:
.word 0
.saved_pllar:
diff --git a/include/linux/clk/at91_pmc.h b/include/linux/clk/at91_pmc.h
index 17f413b..4afd891 100644
--- a/include/linux/clk/at91_pmc.h
+++ b/include/linux/clk/at91_pmc.h
@@ -47,8 +47,10 @@
#define AT91_CKGR_MOR 0x20 /* Main Oscillator Register [not on SAM9RL] */
#define AT91_PMC_MOSCEN (1 << 0) /* Main Oscillator Enable */
#define AT91_PMC_OSCBYPASS (1 << 1) /* Oscillator Bypass */
+#define AT91_PMC_WAITMODE (1 << 2) /* Wait Mode Command */
#define AT91_PMC_MOSCRCEN (1 << 3) /* Main On-Chip RC Oscillator Enable [some SAM9] */
#define AT91_PMC_OSCOUNT (0xff << 8) /* Main Oscillator Start-up Time */
+#define AT91_PMC_KEY_MASK (0xff << 16)
#define AT91_PMC_KEY (0x37 << 16) /* MOR Writing Key */
#define AT91_PMC_MOSCSEL (1 << 24) /* Main Oscillator Selection [some SAM9] */
#define AT91_PMC_CFDEN (1 << 25) /* Clock Failure Detector Enable [some SAM9] */
@@ -166,6 +168,8 @@
#define AT91_PMC_WPVS (0x1 << 0) /* Write Protect Violation Status */
#define AT91_PMC_WPVSRC (0xffff << 8) /* Write Protect Violation Source */
+#define AT91_PMC_VERSION 0xfc
+
#define AT91_PMC_PCER1 0x100 /* Peripheral Clock Enable Register 1 [SAMA5 only]*/
#define AT91_PMC_PCDR1 0x104 /* Peripheral Clock Enable Register 1 */
#define AT91_PMC_PCSR1 0x108 /* Peripheral Clock Enable Register 1 */
--
1.7.9.5
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [PATCH 3/4] ARM: at91: pm: configure PMC fast startup signals
2016-01-28 10:19 ` Wenyou Yang
(?)
@ 2016-01-28 10:19 ` Wenyou Yang
-1 siblings, 0 replies; 21+ messages in thread
From: Wenyou Yang @ 2016-01-28 10:19 UTC (permalink / raw)
To: Nicolas Ferre, Alexandre Belloni,
Jean-Christophe Plagniol-Villard, Russell King
Cc: linux-clk, Rob Herring, Pawel Moll, Mark Brown, Ian Campbell,
Kumar Gala, linux-arm-kernel, linux-kernel, devicetree,
Wenyou Yang
The fast startup signal is used as wake up sources for ULP1 mode.
As soon as a fast startup signal is asserted, the embedded 12 MHz
RC oscillator restarts automatically.
This patch is to configure the fast startup signals, which signal
is enabled to trigger the PMC to wake up the system from ULP1 mode
should be configured via the DT.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
---
arch/arm/mach-at91/pm.c | 96 ++++++++++++++++++++++++++++++++++++++++++
include/linux/clk/at91_pmc.h | 32 ++++++++++++++
2 files changed, 128 insertions(+)
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index a7aec35..2c424b3 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -24,6 +24,8 @@
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/clk/at91_pmc.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
#include <asm/irq.h>
#include <linux/atomic.h>
@@ -425,6 +427,98 @@ static void __init at91_pm_sram_init(void)
&at91_pm_suspend_in_sram, at91_pm_suspend_in_sram_sz);
}
+static int __init at91_pmc_fast_startup_init(void)
+{
+ struct device_node *np;
+ struct regmap *regmap;
+ u32 mode = 0, polarity = 0;
+
+ np = of_find_compatible_node(NULL, NULL,
+ "atmel,sama5d2-pmc-fast-startup");
+ if (!np)
+ return -ENODEV;
+
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap)) {
+ pr_info("AT91: failed to find PMC fast startup\n");
+ return PTR_ERR(regmap);
+ }
+
+ mode |= of_property_read_bool(np, "atmel,fast-startup-wake-up") ?
+ AT91_PMC_FSTT0 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-secumod") ?
+ AT91_PMC_FSTT1 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu0") ?
+ AT91_PMC_FSTT2 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu1") ?
+ AT91_PMC_FSTT3 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu2") ?
+ AT91_PMC_FSTT4 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu3") ?
+ AT91_PMC_FSTT5 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu4") ?
+ AT91_PMC_FSTT6 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu5") ?
+ AT91_PMC_FSTT7 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu6") ?
+ AT91_PMC_FSTT8 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu7") ?
+ AT91_PMC_FSTT9 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-gmac-wol") ?
+ AT91_PMC_FSTT10 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-rtc-alarm") ?
+ AT91_PMC_RTCAL : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-usb-resume") ?
+ AT91_PMC_USBAL : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-sdmmc-cd") ?
+ AT91_PMC_SDMMC_CD : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-rxlp-match") ?
+ AT91_PMC_RXLP_MCE : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-acc-comparison") ?
+ AT91_PMC_ACC_CE : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-wkup-pin-high") ? AT91_PMC_FSTP0 : 0;
+
+ if (mode & AT91_PMC_FSTT1)
+ polarity |= AT91_PMC_FSTP1;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu0-high") ? AT91_PMC_FSTP2 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu1-high") ? AT91_PMC_FSTP3 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu2-high") ? AT91_PMC_FSTP4 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu3-high") ? AT91_PMC_FSTP5 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu4-high") ? AT91_PMC_FSTP6 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu5-high") ? AT91_PMC_FSTP7 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu6-high") ? AT91_PMC_FSTP8 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu7-high") ? AT91_PMC_FSTP9 : 0;
+
+ if (mode & AT91_PMC_FSTT10)
+ polarity |= AT91_PMC_FSTP10;
+
+ regmap_write(regmap, AT91_PMC_FSMR, mode);
+
+ regmap_write(regmap, AT91_PMC_FSPR, polarity);
+
+ of_node_put(np);
+
+ return 0;
+}
+
static const struct of_device_id atmel_pmc_ids[] = {
{ .compatible = "atmel,at91rm9200-pmc" },
{ .compatible = "atmel,at91sam9260-pmc" },
@@ -509,4 +603,6 @@ void __init sama5_pm_init(void)
if (readl(pmc + AT91_PMC_VERSION) >= SAMA5D2_PMC_VERSION)
at91_pm_data.ulp_mode = ULP1_MODE;
+
+ at91_pmc_fast_startup_init();
}
diff --git a/include/linux/clk/at91_pmc.h b/include/linux/clk/at91_pmc.h
index 4afd891..683580e 100644
--- a/include/linux/clk/at91_pmc.h
+++ b/include/linux/clk/at91_pmc.h
@@ -168,6 +168,38 @@
#define AT91_PMC_WPVS (0x1 << 0) /* Write Protect Violation Status */
#define AT91_PMC_WPVSRC (0xffff << 8) /* Write Protect Violation Source */
+#define AT91_PMC_FSMR 0x70 /* Fast Startup Mode Register */
+#define AT91_PMC_FSTT0 BIT(0) /* WKUP Pin Enable */
+#define AT91_PMC_FSTT1 BIT(1) /* Security Module Enable */
+#define AT91_PMC_FSTT2 BIT(2) /* PIOBU0 Input Enable */
+#define AT91_PMC_FSTT3 BIT(3) /* PIOBU1 Input Enable */
+#define AT91_PMC_FSTT4 BIT(4) /* PIOBU2 Input Enable */
+#define AT91_PMC_FSTT5 BIT(5) /* PIOBU3 Input Enable */
+#define AT91_PMC_FSTT6 BIT(6) /* PIOBU4 Input Enable */
+#define AT91_PMC_FSTT7 BIT(7) /* PIOBU5 Input Enable */
+#define AT91_PMC_FSTT8 BIT(8) /* PIOBU6 Input Enable */
+#define AT91_PMC_FSTT9 BIT(9) /* PIOBU7 Input Enable */
+#define AT91_PMC_FSTT10 BIT(10) /* GMAC Wake-up On LAN Enable */
+#define AT91_PMC_RTCAL BIT(17) /* RTC Alarm Enable */
+#define AT91_PMC_USBAL BIT(18) /* USB Resume Enable */
+#define AT91_PMC_SDMMC_CD BIT(19) /* SDMMC Card Detect Enable */
+#define AT91_PMC_LPM BIT(20) /* Low-power Mode */
+#define AT91_PMC_RXLP_MCE BIT(24) /* Backup UART Receive Enable */
+#define AT91_PMC_ACC_CE BIT(25) /* ACC Enable */
+
+#define AT91_PMC_FSPR 0x74 /* Fast Startup Polarity Reg */
+#define AT91_PMC_FSTP0 BIT(0) /* WKUP Pin Polarity */
+#define AT91_PMC_FSTP1 BIT(1) /* Security Module Polarity */
+#define AT91_PMC_FSTP2 BIT(2) /* PIOBU0 Pin Polarity */
+#define AT91_PMC_FSTP3 BIT(3) /* PIOBU1 Pin Polarity */
+#define AT91_PMC_FSTP4 BIT(4) /* PIOBU2 Pin Polarity */
+#define AT91_PMC_FSTP5 BIT(5) /* PIOBU3 Pin Polarity */
+#define AT91_PMC_FSTP6 BIT(6) /* PIOBU4 Pin Polarity */
+#define AT91_PMC_FSTP7 BIT(7) /* PIOBU5 Pin Polarity */
+#define AT91_PMC_FSTP8 BIT(8) /* PIOBU6 Pin Polarity */
+#define AT91_PMC_FSTP9 BIT(9) /* PIOBU7 Pin Polarity */
+#define AT91_PMC_FSTP10 BIT(10) /* Wake-up On LAN Polarity */
+
#define AT91_PMC_VERSION 0xfc
#define AT91_PMC_PCER1 0x100 /* Peripheral Clock Enable Register 1 [SAMA5 only]*/
--
1.7.9.5
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [PATCH 3/4] ARM: at91: pm: configure PMC fast startup signals
@ 2016-01-28 10:19 ` Wenyou Yang
0 siblings, 0 replies; 21+ messages in thread
From: Wenyou Yang @ 2016-01-28 10:19 UTC (permalink / raw)
To: Nicolas Ferre, Alexandre Belloni,
Jean-Christophe Plagniol-Villard, Russell King
Cc: linux-clk, Rob Herring, Pawel Moll, Mark Brown, Ian Campbell,
Kumar Gala, linux-arm-kernel, linux-kernel, devicetree,
Wenyou Yang
The fast startup signal is used as wake up sources for ULP1 mode.
As soon as a fast startup signal is asserted, the embedded 12 MHz
RC oscillator restarts automatically.
This patch is to configure the fast startup signals, which signal
is enabled to trigger the PMC to wake up the system from ULP1 mode
should be configured via the DT.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
---
arch/arm/mach-at91/pm.c | 96 ++++++++++++++++++++++++++++++++++++++++++
include/linux/clk/at91_pmc.h | 32 ++++++++++++++
2 files changed, 128 insertions(+)
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index a7aec35..2c424b3 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -24,6 +24,8 @@
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/clk/at91_pmc.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
#include <asm/irq.h>
#include <linux/atomic.h>
@@ -425,6 +427,98 @@ static void __init at91_pm_sram_init(void)
&at91_pm_suspend_in_sram, at91_pm_suspend_in_sram_sz);
}
+static int __init at91_pmc_fast_startup_init(void)
+{
+ struct device_node *np;
+ struct regmap *regmap;
+ u32 mode = 0, polarity = 0;
+
+ np = of_find_compatible_node(NULL, NULL,
+ "atmel,sama5d2-pmc-fast-startup");
+ if (!np)
+ return -ENODEV;
+
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap)) {
+ pr_info("AT91: failed to find PMC fast startup\n");
+ return PTR_ERR(regmap);
+ }
+
+ mode |= of_property_read_bool(np, "atmel,fast-startup-wake-up") ?
+ AT91_PMC_FSTT0 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-secumod") ?
+ AT91_PMC_FSTT1 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu0") ?
+ AT91_PMC_FSTT2 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu1") ?
+ AT91_PMC_FSTT3 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu2") ?
+ AT91_PMC_FSTT4 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu3") ?
+ AT91_PMC_FSTT5 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu4") ?
+ AT91_PMC_FSTT6 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu5") ?
+ AT91_PMC_FSTT7 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu6") ?
+ AT91_PMC_FSTT8 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu7") ?
+ AT91_PMC_FSTT9 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-gmac-wol") ?
+ AT91_PMC_FSTT10 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-rtc-alarm") ?
+ AT91_PMC_RTCAL : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-usb-resume") ?
+ AT91_PMC_USBAL : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-sdmmc-cd") ?
+ AT91_PMC_SDMMC_CD : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-rxlp-match") ?
+ AT91_PMC_RXLP_MCE : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-acc-comparison") ?
+ AT91_PMC_ACC_CE : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-wkup-pin-high") ? AT91_PMC_FSTP0 : 0;
+
+ if (mode & AT91_PMC_FSTT1)
+ polarity |= AT91_PMC_FSTP1;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu0-high") ? AT91_PMC_FSTP2 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu1-high") ? AT91_PMC_FSTP3 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu2-high") ? AT91_PMC_FSTP4 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu3-high") ? AT91_PMC_FSTP5 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu4-high") ? AT91_PMC_FSTP6 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu5-high") ? AT91_PMC_FSTP7 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu6-high") ? AT91_PMC_FSTP8 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu7-high") ? AT91_PMC_FSTP9 : 0;
+
+ if (mode & AT91_PMC_FSTT10)
+ polarity |= AT91_PMC_FSTP10;
+
+ regmap_write(regmap, AT91_PMC_FSMR, mode);
+
+ regmap_write(regmap, AT91_PMC_FSPR, polarity);
+
+ of_node_put(np);
+
+ return 0;
+}
+
static const struct of_device_id atmel_pmc_ids[] = {
{ .compatible = "atmel,at91rm9200-pmc" },
{ .compatible = "atmel,at91sam9260-pmc" },
@@ -509,4 +603,6 @@ void __init sama5_pm_init(void)
if (readl(pmc + AT91_PMC_VERSION) >= SAMA5D2_PMC_VERSION)
at91_pm_data.ulp_mode = ULP1_MODE;
+
+ at91_pmc_fast_startup_init();
}
diff --git a/include/linux/clk/at91_pmc.h b/include/linux/clk/at91_pmc.h
index 4afd891..683580e 100644
--- a/include/linux/clk/at91_pmc.h
+++ b/include/linux/clk/at91_pmc.h
@@ -168,6 +168,38 @@
#define AT91_PMC_WPVS (0x1 << 0) /* Write Protect Violation Status */
#define AT91_PMC_WPVSRC (0xffff << 8) /* Write Protect Violation Source */
+#define AT91_PMC_FSMR 0x70 /* Fast Startup Mode Register */
+#define AT91_PMC_FSTT0 BIT(0) /* WKUP Pin Enable */
+#define AT91_PMC_FSTT1 BIT(1) /* Security Module Enable */
+#define AT91_PMC_FSTT2 BIT(2) /* PIOBU0 Input Enable */
+#define AT91_PMC_FSTT3 BIT(3) /* PIOBU1 Input Enable */
+#define AT91_PMC_FSTT4 BIT(4) /* PIOBU2 Input Enable */
+#define AT91_PMC_FSTT5 BIT(5) /* PIOBU3 Input Enable */
+#define AT91_PMC_FSTT6 BIT(6) /* PIOBU4 Input Enable */
+#define AT91_PMC_FSTT7 BIT(7) /* PIOBU5 Input Enable */
+#define AT91_PMC_FSTT8 BIT(8) /* PIOBU6 Input Enable */
+#define AT91_PMC_FSTT9 BIT(9) /* PIOBU7 Input Enable */
+#define AT91_PMC_FSTT10 BIT(10) /* GMAC Wake-up On LAN Enable */
+#define AT91_PMC_RTCAL BIT(17) /* RTC Alarm Enable */
+#define AT91_PMC_USBAL BIT(18) /* USB Resume Enable */
+#define AT91_PMC_SDMMC_CD BIT(19) /* SDMMC Card Detect Enable */
+#define AT91_PMC_LPM BIT(20) /* Low-power Mode */
+#define AT91_PMC_RXLP_MCE BIT(24) /* Backup UART Receive Enable */
+#define AT91_PMC_ACC_CE BIT(25) /* ACC Enable */
+
+#define AT91_PMC_FSPR 0x74 /* Fast Startup Polarity Reg */
+#define AT91_PMC_FSTP0 BIT(0) /* WKUP Pin Polarity */
+#define AT91_PMC_FSTP1 BIT(1) /* Security Module Polarity */
+#define AT91_PMC_FSTP2 BIT(2) /* PIOBU0 Pin Polarity */
+#define AT91_PMC_FSTP3 BIT(3) /* PIOBU1 Pin Polarity */
+#define AT91_PMC_FSTP4 BIT(4) /* PIOBU2 Pin Polarity */
+#define AT91_PMC_FSTP5 BIT(5) /* PIOBU3 Pin Polarity */
+#define AT91_PMC_FSTP6 BIT(6) /* PIOBU4 Pin Polarity */
+#define AT91_PMC_FSTP7 BIT(7) /* PIOBU5 Pin Polarity */
+#define AT91_PMC_FSTP8 BIT(8) /* PIOBU6 Pin Polarity */
+#define AT91_PMC_FSTP9 BIT(9) /* PIOBU7 Pin Polarity */
+#define AT91_PMC_FSTP10 BIT(10) /* Wake-up On LAN Polarity */
+
#define AT91_PMC_VERSION 0xfc
#define AT91_PMC_PCER1 0x100 /* Peripheral Clock Enable Register 1 [SAMA5 only]*/
--
1.7.9.5
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [PATCH 3/4] ARM: at91: pm: configure PMC fast startup signals
@ 2016-01-28 10:19 ` Wenyou Yang
0 siblings, 0 replies; 21+ messages in thread
From: Wenyou Yang @ 2016-01-28 10:19 UTC (permalink / raw)
To: linux-arm-kernel
The fast startup signal is used as wake up sources for ULP1 mode.
As soon as a fast startup signal is asserted, the embedded 12 MHz
RC oscillator restarts automatically.
This patch is to configure the fast startup signals, which signal
is enabled to trigger the PMC to wake up the system from ULP1 mode
should be configured via the DT.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
---
arch/arm/mach-at91/pm.c | 96 ++++++++++++++++++++++++++++++++++++++++++
include/linux/clk/at91_pmc.h | 32 ++++++++++++++
2 files changed, 128 insertions(+)
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index a7aec35..2c424b3 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -24,6 +24,8 @@
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/clk/at91_pmc.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
#include <asm/irq.h>
#include <linux/atomic.h>
@@ -425,6 +427,98 @@ static void __init at91_pm_sram_init(void)
&at91_pm_suspend_in_sram, at91_pm_suspend_in_sram_sz);
}
+static int __init at91_pmc_fast_startup_init(void)
+{
+ struct device_node *np;
+ struct regmap *regmap;
+ u32 mode = 0, polarity = 0;
+
+ np = of_find_compatible_node(NULL, NULL,
+ "atmel,sama5d2-pmc-fast-startup");
+ if (!np)
+ return -ENODEV;
+
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap)) {
+ pr_info("AT91: failed to find PMC fast startup\n");
+ return PTR_ERR(regmap);
+ }
+
+ mode |= of_property_read_bool(np, "atmel,fast-startup-wake-up") ?
+ AT91_PMC_FSTT0 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-secumod") ?
+ AT91_PMC_FSTT1 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu0") ?
+ AT91_PMC_FSTT2 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu1") ?
+ AT91_PMC_FSTT3 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu2") ?
+ AT91_PMC_FSTT4 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu3") ?
+ AT91_PMC_FSTT5 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu4") ?
+ AT91_PMC_FSTT6 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu5") ?
+ AT91_PMC_FSTT7 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu6") ?
+ AT91_PMC_FSTT8 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-piobu7") ?
+ AT91_PMC_FSTT9 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-gmac-wol") ?
+ AT91_PMC_FSTT10 : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-rtc-alarm") ?
+ AT91_PMC_RTCAL : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-usb-resume") ?
+ AT91_PMC_USBAL : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-sdmmc-cd") ?
+ AT91_PMC_SDMMC_CD : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-rxlp-match") ?
+ AT91_PMC_RXLP_MCE : 0;
+ mode |= of_property_read_bool(np, "atmel,fast-startup-acc-comparison") ?
+ AT91_PMC_ACC_CE : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-wkup-pin-high") ? AT91_PMC_FSTP0 : 0;
+
+ if (mode & AT91_PMC_FSTT1)
+ polarity |= AT91_PMC_FSTP1;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu0-high") ? AT91_PMC_FSTP2 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu1-high") ? AT91_PMC_FSTP3 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu2-high") ? AT91_PMC_FSTP4 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu3-high") ? AT91_PMC_FSTP5 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu4-high") ? AT91_PMC_FSTP6 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu5-high") ? AT91_PMC_FSTP7 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu6-high") ? AT91_PMC_FSTP8 : 0;
+
+ polarity |= of_property_read_bool(np,
+ "atmel,fast-startup-piobu7-high") ? AT91_PMC_FSTP9 : 0;
+
+ if (mode & AT91_PMC_FSTT10)
+ polarity |= AT91_PMC_FSTP10;
+
+ regmap_write(regmap, AT91_PMC_FSMR, mode);
+
+ regmap_write(regmap, AT91_PMC_FSPR, polarity);
+
+ of_node_put(np);
+
+ return 0;
+}
+
static const struct of_device_id atmel_pmc_ids[] = {
{ .compatible = "atmel,at91rm9200-pmc" },
{ .compatible = "atmel,at91sam9260-pmc" },
@@ -509,4 +603,6 @@ void __init sama5_pm_init(void)
if (readl(pmc + AT91_PMC_VERSION) >= SAMA5D2_PMC_VERSION)
at91_pm_data.ulp_mode = ULP1_MODE;
+
+ at91_pmc_fast_startup_init();
}
diff --git a/include/linux/clk/at91_pmc.h b/include/linux/clk/at91_pmc.h
index 4afd891..683580e 100644
--- a/include/linux/clk/at91_pmc.h
+++ b/include/linux/clk/at91_pmc.h
@@ -168,6 +168,38 @@
#define AT91_PMC_WPVS (0x1 << 0) /* Write Protect Violation Status */
#define AT91_PMC_WPVSRC (0xffff << 8) /* Write Protect Violation Source */
+#define AT91_PMC_FSMR 0x70 /* Fast Startup Mode Register */
+#define AT91_PMC_FSTT0 BIT(0) /* WKUP Pin Enable */
+#define AT91_PMC_FSTT1 BIT(1) /* Security Module Enable */
+#define AT91_PMC_FSTT2 BIT(2) /* PIOBU0 Input Enable */
+#define AT91_PMC_FSTT3 BIT(3) /* PIOBU1 Input Enable */
+#define AT91_PMC_FSTT4 BIT(4) /* PIOBU2 Input Enable */
+#define AT91_PMC_FSTT5 BIT(5) /* PIOBU3 Input Enable */
+#define AT91_PMC_FSTT6 BIT(6) /* PIOBU4 Input Enable */
+#define AT91_PMC_FSTT7 BIT(7) /* PIOBU5 Input Enable */
+#define AT91_PMC_FSTT8 BIT(8) /* PIOBU6 Input Enable */
+#define AT91_PMC_FSTT9 BIT(9) /* PIOBU7 Input Enable */
+#define AT91_PMC_FSTT10 BIT(10) /* GMAC Wake-up On LAN Enable */
+#define AT91_PMC_RTCAL BIT(17) /* RTC Alarm Enable */
+#define AT91_PMC_USBAL BIT(18) /* USB Resume Enable */
+#define AT91_PMC_SDMMC_CD BIT(19) /* SDMMC Card Detect Enable */
+#define AT91_PMC_LPM BIT(20) /* Low-power Mode */
+#define AT91_PMC_RXLP_MCE BIT(24) /* Backup UART Receive Enable */
+#define AT91_PMC_ACC_CE BIT(25) /* ACC Enable */
+
+#define AT91_PMC_FSPR 0x74 /* Fast Startup Polarity Reg */
+#define AT91_PMC_FSTP0 BIT(0) /* WKUP Pin Polarity */
+#define AT91_PMC_FSTP1 BIT(1) /* Security Module Polarity */
+#define AT91_PMC_FSTP2 BIT(2) /* PIOBU0 Pin Polarity */
+#define AT91_PMC_FSTP3 BIT(3) /* PIOBU1 Pin Polarity */
+#define AT91_PMC_FSTP4 BIT(4) /* PIOBU2 Pin Polarity */
+#define AT91_PMC_FSTP5 BIT(5) /* PIOBU3 Pin Polarity */
+#define AT91_PMC_FSTP6 BIT(6) /* PIOBU4 Pin Polarity */
+#define AT91_PMC_FSTP7 BIT(7) /* PIOBU5 Pin Polarity */
+#define AT91_PMC_FSTP8 BIT(8) /* PIOBU6 Pin Polarity */
+#define AT91_PMC_FSTP9 BIT(9) /* PIOBU7 Pin Polarity */
+#define AT91_PMC_FSTP10 BIT(10) /* Wake-up On LAN Polarity */
+
#define AT91_PMC_VERSION 0xfc
#define AT91_PMC_PCER1 0x100 /* Peripheral Clock Enable Register 1 [SAMA5 only]*/
--
1.7.9.5
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [PATCH 4/4] Documentation: atmel-at91: add DT bindings for fast startup
2016-01-28 10:19 ` Wenyou Yang
(?)
@ 2016-01-28 10:19 ` Wenyou Yang
-1 siblings, 0 replies; 21+ messages in thread
From: Wenyou Yang @ 2016-01-28 10:19 UTC (permalink / raw)
To: Nicolas Ferre, Alexandre Belloni,
Jean-Christophe Plagniol-Villard, Russell King
Cc: linux-clk, Rob Herring, Pawel Moll, Mark Brown, Ian Campbell,
Kumar Gala, linux-arm-kernel, linux-kernel, devicetree,
Wenyou Yang
Add DT bindings to configurate the PMC_FSMR and PMC_FSPR registers
to trigger a fast restart signal to PMC.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
---
.../devicetree/bindings/arm/atmel-pmc.txt | 74 ++++++++++++++++++++
1 file changed, 74 insertions(+)
diff --git a/Documentation/devicetree/bindings/arm/atmel-pmc.txt b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
index 795cc78..8d45ff9f 100644
--- a/Documentation/devicetree/bindings/arm/atmel-pmc.txt
+++ b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
@@ -12,3 +12,77 @@ Examples:
compatible = "atmel,at91rm9200-pmc";
reg = <0xfffffc00 0x100>;
};
+
+PMC Fast Startup Signals
+
+The PMC Fast Start Signals are used as the wake up source to trigger the PMC
+to wake up the system from the ULP1 mode.
+
+required properties:
+- compatible: Should be "atmel,sama5d2-pmc-fast-startup".
+
+optional properties:
+- atmel,fast-startup-wake-up: boolean to enable the WKUP pin to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-secumod: boolean to enable the Security Mode to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu0: boolean to enable the PIOBU0 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu1: boolean to enable the PIOBU1 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu2: boolean to enable the PIOBU2 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu3: boolean to enable the PIOBU3 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu4: boolean to enable the PIOBU4 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu5: boolean to enable the PIOBU5 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu6: boolean to enable the PIOBU6 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu7: boolean to enable the PIOBU7 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-gmac-wol: boolean to enable the GMAC Wake-up On LAN
+ to trigger a fast restart signal to the PMC.
+- atmel,fast-startup-rtc-alarm: boolean to enable the RTC Alarm to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-usb-resume: boolean to enable the USB Resume to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-sdmmc-cd: boolean to enable the SDMMC Card Detect
+ to trigger a fast restart signal to the PMC.
+- atmel,fast-startup-rxlp-match: boolean to enable the Backuo UART Receive
+ Match Condition to trigger a fast restart signal to the PMC.
+- atmel,fast-startup-acc-comparison: boolean to enable the Analog Comparator
+ Controller (ACC) Comparison to to trigger a fast restart signal to the PMC.
+
+- atmel,fast-startup-wkup-pin-high: boolean to indicate if the WKUP Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu0-high: boolean to indicate if the PIOBU0 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu1-high: boolean to indicate if the PIOBU1 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu2-high: boolean to indicate if the PIOBU2 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu3-high: boolean to indicate if the PIOBU3 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu4-high: boolean to indicate if the PIOBU4 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu5-high: boolean to indicate if the PIOBU5 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu6-high: boolean to indicate if the PIOBU6 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu7-high: boolean to indicate if the PIOBU7 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+
+Example:
+
+ pmc: pmc@f0014000 {
+ compatible = "atmel,sama5d2-pmc";
+ reg = <0xf0014000 0x160>;
+
+ pmc_fast_restart {
+ compatible = "atmel,sama5d2-pmc-fast-startup";
+ atmel,fast-startup-wake-up;
+ atmel,fast-startup-rtc-alarm;
+ };
+ };
--
1.7.9.5
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [PATCH 4/4] Documentation: atmel-at91: add DT bindings for fast startup
@ 2016-01-28 10:19 ` Wenyou Yang
0 siblings, 0 replies; 21+ messages in thread
From: Wenyou Yang @ 2016-01-28 10:19 UTC (permalink / raw)
To: Nicolas Ferre, Alexandre Belloni,
Jean-Christophe Plagniol-Villard, Russell King
Cc: linux-clk, Rob Herring, Pawel Moll, Mark Brown, Ian Campbell,
Kumar Gala, linux-arm-kernel, linux-kernel, devicetree,
Wenyou Yang
Add DT bindings to configurate the PMC_FSMR and PMC_FSPR registers
to trigger a fast restart signal to PMC.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
---
.../devicetree/bindings/arm/atmel-pmc.txt | 74 ++++++++++++++++++++
1 file changed, 74 insertions(+)
diff --git a/Documentation/devicetree/bindings/arm/atmel-pmc.txt b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
index 795cc78..8d45ff9f 100644
--- a/Documentation/devicetree/bindings/arm/atmel-pmc.txt
+++ b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
@@ -12,3 +12,77 @@ Examples:
compatible = "atmel,at91rm9200-pmc";
reg = <0xfffffc00 0x100>;
};
+
+PMC Fast Startup Signals
+
+The PMC Fast Start Signals are used as the wake up source to trigger the PMC
+to wake up the system from the ULP1 mode.
+
+required properties:
+- compatible: Should be "atmel,sama5d2-pmc-fast-startup".
+
+optional properties:
+- atmel,fast-startup-wake-up: boolean to enable the WKUP pin to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-secumod: boolean to enable the Security Mode to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu0: boolean to enable the PIOBU0 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu1: boolean to enable the PIOBU1 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu2: boolean to enable the PIOBU2 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu3: boolean to enable the PIOBU3 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu4: boolean to enable the PIOBU4 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu5: boolean to enable the PIOBU5 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu6: boolean to enable the PIOBU6 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu7: boolean to enable the PIOBU7 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-gmac-wol: boolean to enable the GMAC Wake-up On LAN
+ to trigger a fast restart signal to the PMC.
+- atmel,fast-startup-rtc-alarm: boolean to enable the RTC Alarm to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-usb-resume: boolean to enable the USB Resume to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-sdmmc-cd: boolean to enable the SDMMC Card Detect
+ to trigger a fast restart signal to the PMC.
+- atmel,fast-startup-rxlp-match: boolean to enable the Backuo UART Receive
+ Match Condition to trigger a fast restart signal to the PMC.
+- atmel,fast-startup-acc-comparison: boolean to enable the Analog Comparator
+ Controller (ACC) Comparison to to trigger a fast restart signal to the PMC.
+
+- atmel,fast-startup-wkup-pin-high: boolean to indicate if the WKUP Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu0-high: boolean to indicate if the PIOBU0 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu1-high: boolean to indicate if the PIOBU1 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu2-high: boolean to indicate if the PIOBU2 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu3-high: boolean to indicate if the PIOBU3 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu4-high: boolean to indicate if the PIOBU4 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu5-high: boolean to indicate if the PIOBU5 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu6-high: boolean to indicate if the PIOBU6 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu7-high: boolean to indicate if the PIOBU7 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+
+Example:
+
+ pmc: pmc@f0014000 {
+ compatible = "atmel,sama5d2-pmc";
+ reg = <0xf0014000 0x160>;
+
+ pmc_fast_restart {
+ compatible = "atmel,sama5d2-pmc-fast-startup";
+ atmel,fast-startup-wake-up;
+ atmel,fast-startup-rtc-alarm;
+ };
+ };
--
1.7.9.5
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [PATCH 4/4] Documentation: atmel-at91: add DT bindings for fast startup
@ 2016-01-28 10:19 ` Wenyou Yang
0 siblings, 0 replies; 21+ messages in thread
From: Wenyou Yang @ 2016-01-28 10:19 UTC (permalink / raw)
To: linux-arm-kernel
Add DT bindings to configurate the PMC_FSMR and PMC_FSPR registers
to trigger a fast restart signal to PMC.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
---
.../devicetree/bindings/arm/atmel-pmc.txt | 74 ++++++++++++++++++++
1 file changed, 74 insertions(+)
diff --git a/Documentation/devicetree/bindings/arm/atmel-pmc.txt b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
index 795cc78..8d45ff9f 100644
--- a/Documentation/devicetree/bindings/arm/atmel-pmc.txt
+++ b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
@@ -12,3 +12,77 @@ Examples:
compatible = "atmel,at91rm9200-pmc";
reg = <0xfffffc00 0x100>;
};
+
+PMC Fast Startup Signals
+
+The PMC Fast Start Signals are used as the wake up source to trigger the PMC
+to wake up the system from the ULP1 mode.
+
+required properties:
+- compatible: Should be "atmel,sama5d2-pmc-fast-startup".
+
+optional properties:
+- atmel,fast-startup-wake-up: boolean to enable the WKUP pin to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-secumod: boolean to enable the Security Mode to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu0: boolean to enable the PIOBU0 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu1: boolean to enable the PIOBU1 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu2: boolean to enable the PIOBU2 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu3: boolean to enable the PIOBU3 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu4: boolean to enable the PIOBU4 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu5: boolean to enable the PIOBU5 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu6: boolean to enable the PIOBU6 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-piobu7: boolean to enable the PIOBU7 Input to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-gmac-wol: boolean to enable the GMAC Wake-up On LAN
+ to trigger a fast restart signal to the PMC.
+- atmel,fast-startup-rtc-alarm: boolean to enable the RTC Alarm to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-usb-resume: boolean to enable the USB Resume to trigger
+ a fast restart signal to the PMC.
+- atmel,fast-startup-sdmmc-cd: boolean to enable the SDMMC Card Detect
+ to trigger a fast restart signal to the PMC.
+- atmel,fast-startup-rxlp-match: boolean to enable the Backuo UART Receive
+ Match Condition to trigger a fast restart signal to the PMC.
+- atmel,fast-startup-acc-comparison: boolean to enable the Analog Comparator
+ Controller (ACC) Comparison to to trigger a fast restart signal to the PMC.
+
+- atmel,fast-startup-wkup-pin-high: boolean to indicate if the WKUP Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu0-high: boolean to indicate if the PIOBU0 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu1-high: boolean to indicate if the PIOBU1 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu2-high: boolean to indicate if the PIOBU2 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu3-high: boolean to indicate if the PIOBU3 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu4-high: boolean to indicate if the PIOBU4 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu5-high: boolean to indicate if the PIOBU5 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu6-high: boolean to indicate if the PIOBU6 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+- atmel,fast-startup-piobu7-high: boolean to indicate if the PIOBU7 Pin is
+ in the high level to trigger fast restart signal, otherwise low level.
+
+Example:
+
+ pmc: pmc at f0014000 {
+ compatible = "atmel,sama5d2-pmc";
+ reg = <0xf0014000 0x160>;
+
+ pmc_fast_restart {
+ compatible = "atmel,sama5d2-pmc-fast-startup";
+ atmel,fast-startup-wake-up;
+ atmel,fast-startup-rtc-alarm;
+ };
+ };
--
1.7.9.5
^ permalink raw reply related [flat|nested] 21+ messages in thread
* Re: [PATCH 4/4] Documentation: atmel-at91: add DT bindings for fast startup
2016-01-28 10:19 ` Wenyou Yang
@ 2016-01-29 16:20 ` Rob Herring
-1 siblings, 0 replies; 21+ messages in thread
From: Rob Herring @ 2016-01-29 16:20 UTC (permalink / raw)
To: Wenyou Yang
Cc: Nicolas Ferre, Alexandre Belloni,
Jean-Christophe Plagniol-Villard, Russell King, linux-clk,
Pawel Moll, Mark Brown, Ian Campbell, Kumar Gala,
linux-arm-kernel, linux-kernel, devicetree
On Thu, Jan 28, 2016 at 06:19:16PM +0800, Wenyou Yang wrote:
> Add DT bindings to configurate the PMC_FSMR and PMC_FSPR registers
> to trigger a fast restart signal to PMC.
>
> Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
> ---
>
> .../devicetree/bindings/arm/atmel-pmc.txt | 74 ++++++++++++++++++++
> 1 file changed, 74 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/arm/atmel-pmc.txt b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
> index 795cc78..8d45ff9f 100644
> --- a/Documentation/devicetree/bindings/arm/atmel-pmc.txt
> +++ b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
> @@ -12,3 +12,77 @@ Examples:
> compatible = "atmel,at91rm9200-pmc";
> reg = <0xfffffc00 0x100>;
> };
> +
> +PMC Fast Startup Signals
> +
> +The PMC Fast Start Signals are used as the wake up source to trigger the PMC
> +to wake up the system from the ULP1 mode.
> +
> +required properties:
> +- compatible: Should be "atmel,sama5d2-pmc-fast-startup".
Why the compatible? Does this correspond to some h/w block rather than
features of the PMC? If it is simply because you want to have a separate
driver, that is not a good reason.
> +
> +optional properties:
> +- atmel,fast-startup-wake-up: boolean to enable the WKUP pin to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-secumod: boolean to enable the Security Mode to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-piobu0: boolean to enable the PIOBU0 Input to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-piobu1: boolean to enable the PIOBU1 Input to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-piobu2: boolean to enable the PIOBU2 Input to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-piobu3: boolean to enable the PIOBU3 Input to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-piobu4: boolean to enable the PIOBU4 Input to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-piobu5: boolean to enable the PIOBU5 Input to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-piobu6: boolean to enable the PIOBU6 Input to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-piobu7: boolean to enable the PIOBU7 Input to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-gmac-wol: boolean to enable the GMAC Wake-up On LAN
> + to trigger a fast restart signal to the PMC.
> +- atmel,fast-startup-rtc-alarm: boolean to enable the RTC Alarm to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-usb-resume: boolean to enable the USB Resume to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-sdmmc-cd: boolean to enable the SDMMC Card Detect
> + to trigger a fast restart signal to the PMC.
> +- atmel,fast-startup-rxlp-match: boolean to enable the Backuo UART Receive
> + Match Condition to trigger a fast restart signal to the PMC.
> +- atmel,fast-startup-acc-comparison: boolean to enable the Analog Comparator
> + Controller (ACC) Comparison to to trigger a fast restart signal to the PMC.
> +
> +- atmel,fast-startup-wkup-pin-high: boolean to indicate if the WKUP Pin is
> + in the high level to trigger fast restart signal, otherwise low level.
Perhaps just make the above bool properties take a value to indicate
high or low triggered.
> +- atmel,fast-startup-piobu0-high: boolean to indicate if the PIOBU0 Pin is
> + in the high level to trigger fast restart signal, otherwise low level.
> +- atmel,fast-startup-piobu1-high: boolean to indicate if the PIOBU1 Pin is
> + in the high level to trigger fast restart signal, otherwise low level.
> +- atmel,fast-startup-piobu2-high: boolean to indicate if the PIOBU2 Pin is
> + in the high level to trigger fast restart signal, otherwise low level.
> +- atmel,fast-startup-piobu3-high: boolean to indicate if the PIOBU3 Pin is
> + in the high level to trigger fast restart signal, otherwise low level.
> +- atmel,fast-startup-piobu4-high: boolean to indicate if the PIOBU4 Pin is
> + in the high level to trigger fast restart signal, otherwise low level.
> +- atmel,fast-startup-piobu5-high: boolean to indicate if the PIOBU5 Pin is
> + in the high level to trigger fast restart signal, otherwise low level.
> +- atmel,fast-startup-piobu6-high: boolean to indicate if the PIOBU6 Pin is
> + in the high level to trigger fast restart signal, otherwise low level.
> +- atmel,fast-startup-piobu7-high: boolean to indicate if the PIOBU7 Pin is
> + in the high level to trigger fast restart signal, otherwise low level.
This would be a long list in the DT if you set all these properties.
Perhaps this should all be expressed in a more compact form.
> +
> +Example:
> +
> + pmc: pmc@f0014000 {
> + compatible = "atmel,sama5d2-pmc";
> + reg = <0xf0014000 0x160>;
> +
> + pmc_fast_restart {
> + compatible = "atmel,sama5d2-pmc-fast-startup";
> + atmel,fast-startup-wake-up;
> + atmel,fast-startup-rtc-alarm;
> + };
> + };
> --
> 1.7.9.5
>
^ permalink raw reply [flat|nested] 21+ messages in thread
* [PATCH 4/4] Documentation: atmel-at91: add DT bindings for fast startup
@ 2016-01-29 16:20 ` Rob Herring
0 siblings, 0 replies; 21+ messages in thread
From: Rob Herring @ 2016-01-29 16:20 UTC (permalink / raw)
To: linux-arm-kernel
On Thu, Jan 28, 2016 at 06:19:16PM +0800, Wenyou Yang wrote:
> Add DT bindings to configurate the PMC_FSMR and PMC_FSPR registers
> to trigger a fast restart signal to PMC.
>
> Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
> ---
>
> .../devicetree/bindings/arm/atmel-pmc.txt | 74 ++++++++++++++++++++
> 1 file changed, 74 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/arm/atmel-pmc.txt b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
> index 795cc78..8d45ff9f 100644
> --- a/Documentation/devicetree/bindings/arm/atmel-pmc.txt
> +++ b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
> @@ -12,3 +12,77 @@ Examples:
> compatible = "atmel,at91rm9200-pmc";
> reg = <0xfffffc00 0x100>;
> };
> +
> +PMC Fast Startup Signals
> +
> +The PMC Fast Start Signals are used as the wake up source to trigger the PMC
> +to wake up the system from the ULP1 mode.
> +
> +required properties:
> +- compatible: Should be "atmel,sama5d2-pmc-fast-startup".
Why the compatible? Does this correspond to some h/w block rather than
features of the PMC? If it is simply because you want to have a separate
driver, that is not a good reason.
> +
> +optional properties:
> +- atmel,fast-startup-wake-up: boolean to enable the WKUP pin to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-secumod: boolean to enable the Security Mode to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-piobu0: boolean to enable the PIOBU0 Input to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-piobu1: boolean to enable the PIOBU1 Input to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-piobu2: boolean to enable the PIOBU2 Input to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-piobu3: boolean to enable the PIOBU3 Input to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-piobu4: boolean to enable the PIOBU4 Input to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-piobu5: boolean to enable the PIOBU5 Input to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-piobu6: boolean to enable the PIOBU6 Input to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-piobu7: boolean to enable the PIOBU7 Input to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-gmac-wol: boolean to enable the GMAC Wake-up On LAN
> + to trigger a fast restart signal to the PMC.
> +- atmel,fast-startup-rtc-alarm: boolean to enable the RTC Alarm to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-usb-resume: boolean to enable the USB Resume to trigger
> + a fast restart signal to the PMC.
> +- atmel,fast-startup-sdmmc-cd: boolean to enable the SDMMC Card Detect
> + to trigger a fast restart signal to the PMC.
> +- atmel,fast-startup-rxlp-match: boolean to enable the Backuo UART Receive
> + Match Condition to trigger a fast restart signal to the PMC.
> +- atmel,fast-startup-acc-comparison: boolean to enable the Analog Comparator
> + Controller (ACC) Comparison to to trigger a fast restart signal to the PMC.
> +
> +- atmel,fast-startup-wkup-pin-high: boolean to indicate if the WKUP Pin is
> + in the high level to trigger fast restart signal, otherwise low level.
Perhaps just make the above bool properties take a value to indicate
high or low triggered.
> +- atmel,fast-startup-piobu0-high: boolean to indicate if the PIOBU0 Pin is
> + in the high level to trigger fast restart signal, otherwise low level.
> +- atmel,fast-startup-piobu1-high: boolean to indicate if the PIOBU1 Pin is
> + in the high level to trigger fast restart signal, otherwise low level.
> +- atmel,fast-startup-piobu2-high: boolean to indicate if the PIOBU2 Pin is
> + in the high level to trigger fast restart signal, otherwise low level.
> +- atmel,fast-startup-piobu3-high: boolean to indicate if the PIOBU3 Pin is
> + in the high level to trigger fast restart signal, otherwise low level.
> +- atmel,fast-startup-piobu4-high: boolean to indicate if the PIOBU4 Pin is
> + in the high level to trigger fast restart signal, otherwise low level.
> +- atmel,fast-startup-piobu5-high: boolean to indicate if the PIOBU5 Pin is
> + in the high level to trigger fast restart signal, otherwise low level.
> +- atmel,fast-startup-piobu6-high: boolean to indicate if the PIOBU6 Pin is
> + in the high level to trigger fast restart signal, otherwise low level.
> +- atmel,fast-startup-piobu7-high: boolean to indicate if the PIOBU7 Pin is
> + in the high level to trigger fast restart signal, otherwise low level.
This would be a long list in the DT if you set all these properties.
Perhaps this should all be expressed in a more compact form.
> +
> +Example:
> +
> + pmc: pmc at f0014000 {
> + compatible = "atmel,sama5d2-pmc";
> + reg = <0xf0014000 0x160>;
> +
> + pmc_fast_restart {
> + compatible = "atmel,sama5d2-pmc-fast-startup";
> + atmel,fast-startup-wake-up;
> + atmel,fast-startup-rtc-alarm;
> + };
> + };
> --
> 1.7.9.5
>
^ permalink raw reply [flat|nested] 21+ messages in thread
* RE: [PATCH 4/4] Documentation: atmel-at91: add DT bindings for fast startup
2016-01-29 16:20 ` Rob Herring
(?)
(?)
@ 2016-02-01 6:22 ` Yang, Wenyou
-1 siblings, 0 replies; 21+ messages in thread
From: Yang, Wenyou @ 2016-02-01 6:22 UTC (permalink / raw)
To: Rob Herring
Cc: Ferre, Nicolas, Alexandre Belloni,
Jean-Christophe Plagniol-Villard, Russell King, linux-clk,
Pawel Moll, Mark Brown, Ian Campbell, Kumar Gala,
linux-arm-kernel, linux-kernel, devicetree
Hi Rob,
Thank you for your review.
> -----Original Message-----
> From: Rob Herring [mailto:robh@kernel.org]
> Sent: 2016年1月30日 0:20
> To: Yang, Wenyou <Wenyou.Yang@atmel.com>
> Cc: Ferre, Nicolas <Nicolas.FERRE@atmel.com>; Alexandre Belloni
> <alexandre.belloni@free-electrons.com>; Jean-Christophe Plagniol-Villard
> <plagnioj@jcrosoft.com>; Russell King <linux@arm.linux.org.uk>; linux-
> clk@vger.kernel.org; Pawel Moll <pawel.moll@arm.com>; Mark Brown
> <broonie@kernel.org>; Ian Campbell <ijc+devicetree@hellion.org.uk>; Kumar
> Gala <galak@codeaurora.org>; linux-arm-kernel@lists.infradead.org; linux-
> kernel@vger.kernel.org; devicetree@vger.kernel.org
> Subject: Re: [PATCH 4/4] Documentation: atmel-at91: add DT bindings for fast
> startup
>
> On Thu, Jan 28, 2016 at 06:19:16PM +0800, Wenyou Yang wrote:
> > Add DT bindings to configurate the PMC_FSMR and PMC_FSPR registers to
> > trigger a fast restart signal to PMC.
> >
> > Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
> > ---
> >
> > .../devicetree/bindings/arm/atmel-pmc.txt | 74
> ++++++++++++++++++++
> > 1 file changed, 74 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/arm/atmel-pmc.txt
> > b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
> > index 795cc78..8d45ff9f 100644
> > --- a/Documentation/devicetree/bindings/arm/atmel-pmc.txt
> > +++ b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
> > @@ -12,3 +12,77 @@ Examples:
> > compatible = "atmel,at91rm9200-pmc";
> > reg = <0xfffffc00 0x100>;
> > };
> > +
> > +PMC Fast Startup Signals
> > +
> > +The PMC Fast Start Signals are used as the wake up source to trigger
> > +the PMC to wake up the system from the ULP1 mode.
> > +
> > +required properties:
> > +- compatible: Should be "atmel,sama5d2-pmc-fast-startup".
>
> Why the compatible? Does this correspond to some h/w block rather than features
> of the PMC? If it is simply because you want to have a separate driver, that is not
> a good reason.
The PMC is regarded as an MFD device.
The Fast Startup function is a sub-device, the driver access the register
through regmap returned from the syscon helper API syscon_node_to_regmap().
>
> > +
> > +optional properties:
> > +- atmel,fast-startup-wake-up: boolean to enable the WKUP pin to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-secumod: boolean to enable the Security Mode to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu0: boolean to enable the PIOBU0 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu1: boolean to enable the PIOBU1 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu2: boolean to enable the PIOBU2 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu3: boolean to enable the PIOBU3 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu4: boolean to enable the PIOBU4 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu5: boolean to enable the PIOBU5 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu6: boolean to enable the PIOBU6 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu7: boolean to enable the PIOBU7 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-gmac-wol: boolean to enable the GMAC Wake-up On
> > +LAN
> > + to trigger a fast restart signal to the PMC.
> > +- atmel,fast-startup-rtc-alarm: boolean to enable the RTC Alarm to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-usb-resume: boolean to enable the USB Resume to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-sdmmc-cd: boolean to enable the SDMMC Card
> > +Detect
> > + to trigger a fast restart signal to the PMC.
> > +- atmel,fast-startup-rxlp-match: boolean to enable the Backuo UART
> > +Receive
> > + Match Condition to trigger a fast restart signal to the PMC.
> > +- atmel,fast-startup-acc-comparison: boolean to enable the Analog
> > +Comparator
> > + Controller (ACC) Comparison to to trigger a fast restart signal to the PMC.
> > +
> > +- atmel,fast-startup-wkup-pin-high: boolean to indicate if the WKUP
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
>
> Perhaps just make the above bool properties take a value to indicate high or low
> triggered.
Agreed.
How about the following changes? And a more compact form.
atmel,fs-wkup-pin-level = <1>; to indicated the WKUP Pin is in the high level trigged.
atmel,fs-wkup-pin-level = <0>; to indicated the WKUP Pin is in the low level trigged.
>
> > +- atmel,fast-startup-piobu0-high: boolean to indicate if the PIOBU0
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu1-high: boolean to indicate if the PIOBU1
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu2-high: boolean to indicate if the PIOBU2
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu3-high: boolean to indicate if the PIOBU3
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu4-high: boolean to indicate if the PIOBU4
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu5-high: boolean to indicate if the PIOBU5
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu6-high: boolean to indicate if the PIOBU6
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu7-high: boolean to indicate if the PIOBU7
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
>
> This would be a long list in the DT if you set all these properties.
> Perhaps this should all be expressed in a more compact form.
>
Yes, change as above.
> > +
> > +Example:
> > +
> > + pmc: pmc@f0014000 {
> > + compatible = "atmel,sama5d2-pmc";
> > + reg = <0xf0014000 0x160>;
> > +
> > + pmc_fast_restart {
> > + compatible = "atmel,sama5d2-pmc-fast-startup";
> > + atmel,fast-startup-wake-up;
> > + atmel,fast-startup-rtc-alarm;
> > + };
> > + };
> > --
> > 1.7.9.5
> >
Best Regards,
Wenyou Yang
^ permalink raw reply [flat|nested] 21+ messages in thread
* RE: [PATCH 4/4] Documentation: atmel-at91: add DT bindings for fast startup
@ 2016-02-01 6:22 ` Yang, Wenyou
0 siblings, 0 replies; 21+ messages in thread
From: Yang, Wenyou @ 2016-02-01 6:22 UTC (permalink / raw)
To: Rob Herring
Cc: Ferre, Nicolas, Alexandre Belloni,
Jean-Christophe Plagniol-Villard, Russell King,
linux-clk-u79uwXL29TY76Z2rM5mHXA, Pawel Moll, Mark Brown,
Ian Campbell, Kumar Gala,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-kernel-u79uwXL29TY76Z2rM5mHXA,
devicetree-u79uwXL29TY76Z2rM5mHXA
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset="gb2312", Size: 6974 bytes --]
Hi Rob,
Thank you for your review.
> -----Original Message-----
> From: Rob Herring [mailto:robh@kernel.org]
> Sent: 2016Äê1ÔÂ30ÈÕ 0:20
> To: Yang, Wenyou <Wenyou.Yang@atmel.com>
> Cc: Ferre, Nicolas <Nicolas.FERRE@atmel.com>; Alexandre Belloni
> <alexandre.belloni@free-electrons.com>; Jean-Christophe Plagniol-Villard
> <plagnioj@jcrosoft.com>; Russell King <linux@arm.linux.org.uk>; linux-
> clk@vger.kernel.org; Pawel Moll <pawel.moll@arm.com>; Mark Brown
> <broonie@kernel.org>; Ian Campbell <ijc+devicetree@hellion.org.uk>; Kumar
> Gala <galak@codeaurora.org>; linux-arm-kernel@lists.infradead.org; linux-
> kernel@vger.kernel.org; devicetree@vger.kernel.org
> Subject: Re: [PATCH 4/4] Documentation: atmel-at91: add DT bindings for fast
> startup
>
> On Thu, Jan 28, 2016 at 06:19:16PM +0800, Wenyou Yang wrote:
> > Add DT bindings to configurate the PMC_FSMR and PMC_FSPR registers to
> > trigger a fast restart signal to PMC.
> >
> > Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
> > ---
> >
> > .../devicetree/bindings/arm/atmel-pmc.txt | 74
> ++++++++++++++++++++
> > 1 file changed, 74 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/arm/atmel-pmc.txt
> > b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
> > index 795cc78..8d45ff9f 100644
> > --- a/Documentation/devicetree/bindings/arm/atmel-pmc.txt
> > +++ b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
> > @@ -12,3 +12,77 @@ Examples:
> > compatible = "atmel,at91rm9200-pmc";
> > reg = <0xfffffc00 0x100>;
> > };
> > +
> > +PMC Fast Startup Signals
> > +
> > +The PMC Fast Start Signals are used as the wake up source to trigger
> > +the PMC to wake up the system from the ULP1 mode.
> > +
> > +required properties:
> > +- compatible: Should be "atmel,sama5d2-pmc-fast-startup".
>
> Why the compatible? Does this correspond to some h/w block rather than features
> of the PMC? If it is simply because you want to have a separate driver, that is not
> a good reason.
The PMC is regarded as an MFD device.
The Fast Startup function is a sub-device, the driver access the register
through regmap returned from the syscon helper API syscon_node_to_regmap().
>
> > +
> > +optional properties:
> > +- atmel,fast-startup-wake-up: boolean to enable the WKUP pin to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-secumod: boolean to enable the Security Mode to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu0: boolean to enable the PIOBU0 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu1: boolean to enable the PIOBU1 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu2: boolean to enable the PIOBU2 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu3: boolean to enable the PIOBU3 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu4: boolean to enable the PIOBU4 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu5: boolean to enable the PIOBU5 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu6: boolean to enable the PIOBU6 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu7: boolean to enable the PIOBU7 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-gmac-wol: boolean to enable the GMAC Wake-up On
> > +LAN
> > + to trigger a fast restart signal to the PMC.
> > +- atmel,fast-startup-rtc-alarm: boolean to enable the RTC Alarm to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-usb-resume: boolean to enable the USB Resume to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-sdmmc-cd: boolean to enable the SDMMC Card
> > +Detect
> > + to trigger a fast restart signal to the PMC.
> > +- atmel,fast-startup-rxlp-match: boolean to enable the Backuo UART
> > +Receive
> > + Match Condition to trigger a fast restart signal to the PMC.
> > +- atmel,fast-startup-acc-comparison: boolean to enable the Analog
> > +Comparator
> > + Controller (ACC) Comparison to to trigger a fast restart signal to the PMC.
> > +
> > +- atmel,fast-startup-wkup-pin-high: boolean to indicate if the WKUP
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
>
> Perhaps just make the above bool properties take a value to indicate high or low
> triggered.
Agreed.
How about the following changes? And a more compact form.
atmel,fs-wkup-pin-level = <1>; to indicated the WKUP Pin is in the high level trigged.
atmel,fs-wkup-pin-level = <0>; to indicated the WKUP Pin is in the low level trigged.
>
> > +- atmel,fast-startup-piobu0-high: boolean to indicate if the PIOBU0
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu1-high: boolean to indicate if the PIOBU1
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu2-high: boolean to indicate if the PIOBU2
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu3-high: boolean to indicate if the PIOBU3
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu4-high: boolean to indicate if the PIOBU4
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu5-high: boolean to indicate if the PIOBU5
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu6-high: boolean to indicate if the PIOBU6
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu7-high: boolean to indicate if the PIOBU7
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
>
> This would be a long list in the DT if you set all these properties.
> Perhaps this should all be expressed in a more compact form.
>
Yes, change as above.
> > +
> > +Example:
> > +
> > + pmc: pmc@f0014000 {
> > + compatible = "atmel,sama5d2-pmc";
> > + reg = <0xf0014000 0x160>;
> > +
> > + pmc_fast_restart {
> > + compatible = "atmel,sama5d2-pmc-fast-startup";
> > + atmel,fast-startup-wake-up;
> > + atmel,fast-startup-rtc-alarm;
> > + };
> > + };
> > --
> > 1.7.9.5
> >
Best Regards,
Wenyou Yang
N§²æìr¸yúèØb²X¬¶Ç§vØ^)Þº{.nÇ+·zøzÚÞz)í
æèw*\x1fjg¬±¨\x1e¶Ý¢j.ïÛ°\½½MúgjÌæa×\x02' ©Þ¢¸\f¢·¦j:+v¨wèjØm¶ÿ¾\a«êçzZ+ùÝ¢j"ú!¶i
^ permalink raw reply [flat|nested] 21+ messages in thread
* RE: [PATCH 4/4] Documentation: atmel-at91: add DT bindings for fast startup
@ 2016-02-01 6:22 ` Yang, Wenyou
0 siblings, 0 replies; 21+ messages in thread
From: Yang, Wenyou @ 2016-02-01 6:22 UTC (permalink / raw)
To: Rob Herring
Cc: Ferre, Nicolas, Alexandre Belloni,
Jean-Christophe Plagniol-Villard, Russell King, linux-clk,
Pawel Moll, Mark Brown, Ian Campbell, Kumar Gala,
linux-arm-kernel, linux-kernel, devicetree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^ permalink raw reply [flat|nested] 21+ messages in thread
* [PATCH 4/4] Documentation: atmel-at91: add DT bindings for fast startup
@ 2016-02-01 6:22 ` Yang, Wenyou
0 siblings, 0 replies; 21+ messages in thread
From: Yang, Wenyou @ 2016-02-01 6:22 UTC (permalink / raw)
To: linux-arm-kernel
Hi Rob,
Thank you for your review.
> -----Original Message-----
> From: Rob Herring [mailto:robh at kernel.org]
> Sent: 2016?1?30? 0:20
> To: Yang, Wenyou <Wenyou.Yang@atmel.com>
> Cc: Ferre, Nicolas <Nicolas.FERRE@atmel.com>; Alexandre Belloni
> <alexandre.belloni@free-electrons.com>; Jean-Christophe Plagniol-Villard
> <plagnioj@jcrosoft.com>; Russell King <linux@arm.linux.org.uk>; linux-
> clk at vger.kernel.org; Pawel Moll <pawel.moll@arm.com>; Mark Brown
> <broonie@kernel.org>; Ian Campbell <ijc+devicetree@hellion.org.uk>; Kumar
> Gala <galak@codeaurora.org>; linux-arm-kernel at lists.infradead.org; linux-
> kernel at vger.kernel.org; devicetree at vger.kernel.org
> Subject: Re: [PATCH 4/4] Documentation: atmel-at91: add DT bindings for fast
> startup
>
> On Thu, Jan 28, 2016 at 06:19:16PM +0800, Wenyou Yang wrote:
> > Add DT bindings to configurate the PMC_FSMR and PMC_FSPR registers to
> > trigger a fast restart signal to PMC.
> >
> > Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
> > ---
> >
> > .../devicetree/bindings/arm/atmel-pmc.txt | 74
> ++++++++++++++++++++
> > 1 file changed, 74 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/arm/atmel-pmc.txt
> > b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
> > index 795cc78..8d45ff9f 100644
> > --- a/Documentation/devicetree/bindings/arm/atmel-pmc.txt
> > +++ b/Documentation/devicetree/bindings/arm/atmel-pmc.txt
> > @@ -12,3 +12,77 @@ Examples:
> > compatible = "atmel,at91rm9200-pmc";
> > reg = <0xfffffc00 0x100>;
> > };
> > +
> > +PMC Fast Startup Signals
> > +
> > +The PMC Fast Start Signals are used as the wake up source to trigger
> > +the PMC to wake up the system from the ULP1 mode.
> > +
> > +required properties:
> > +- compatible: Should be "atmel,sama5d2-pmc-fast-startup".
>
> Why the compatible? Does this correspond to some h/w block rather than features
> of the PMC? If it is simply because you want to have a separate driver, that is not
> a good reason.
The PMC is regarded as an MFD device.
The Fast Startup function is a sub-device, the driver access the register
through regmap returned from the syscon helper API syscon_node_to_regmap().
>
> > +
> > +optional properties:
> > +- atmel,fast-startup-wake-up: boolean to enable the WKUP pin to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-secumod: boolean to enable the Security Mode to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu0: boolean to enable the PIOBU0 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu1: boolean to enable the PIOBU1 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu2: boolean to enable the PIOBU2 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu3: boolean to enable the PIOBU3 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu4: boolean to enable the PIOBU4 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu5: boolean to enable the PIOBU5 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu6: boolean to enable the PIOBU6 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-piobu7: boolean to enable the PIOBU7 Input to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-gmac-wol: boolean to enable the GMAC Wake-up On
> > +LAN
> > + to trigger a fast restart signal to the PMC.
> > +- atmel,fast-startup-rtc-alarm: boolean to enable the RTC Alarm to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-usb-resume: boolean to enable the USB Resume to
> > +trigger
> > + a fast restart signal to the PMC.
> > +- atmel,fast-startup-sdmmc-cd: boolean to enable the SDMMC Card
> > +Detect
> > + to trigger a fast restart signal to the PMC.
> > +- atmel,fast-startup-rxlp-match: boolean to enable the Backuo UART
> > +Receive
> > + Match Condition to trigger a fast restart signal to the PMC.
> > +- atmel,fast-startup-acc-comparison: boolean to enable the Analog
> > +Comparator
> > + Controller (ACC) Comparison to to trigger a fast restart signal to the PMC.
> > +
> > +- atmel,fast-startup-wkup-pin-high: boolean to indicate if the WKUP
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
>
> Perhaps just make the above bool properties take a value to indicate high or low
> triggered.
Agreed.
How about the following changes? And a more compact form.
atmel,fs-wkup-pin-level = <1>; to indicated the WKUP Pin is in the high level trigged.
atmel,fs-wkup-pin-level = <0>; to indicated the WKUP Pin is in the low level trigged.
>
> > +- atmel,fast-startup-piobu0-high: boolean to indicate if the PIOBU0
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu1-high: boolean to indicate if the PIOBU1
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu2-high: boolean to indicate if the PIOBU2
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu3-high: boolean to indicate if the PIOBU3
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu4-high: boolean to indicate if the PIOBU4
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu5-high: boolean to indicate if the PIOBU5
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu6-high: boolean to indicate if the PIOBU6
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
> > +- atmel,fast-startup-piobu7-high: boolean to indicate if the PIOBU7
> > +Pin is
> > + in the high level to trigger fast restart signal, otherwise low level.
>
> This would be a long list in the DT if you set all these properties.
> Perhaps this should all be expressed in a more compact form.
>
Yes, change as above.
> > +
> > +Example:
> > +
> > + pmc: pmc at f0014000 {
> > + compatible = "atmel,sama5d2-pmc";
> > + reg = <0xf0014000 0x160>;
> > +
> > + pmc_fast_restart {
> > + compatible = "atmel,sama5d2-pmc-fast-startup";
> > + atmel,fast-startup-wake-up;
> > + atmel,fast-startup-rtc-alarm;
> > + };
> > + };
> > --
> > 1.7.9.5
> >
Best Regards,
Wenyou Yang
^ permalink raw reply [flat|nested] 21+ messages in thread
end of thread, other threads:[~2016-02-01 6:22 UTC | newest]
Thread overview: 21+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-01-28 10:19 [PATCH 0/4] ARM: at91: pm: add ULP1 mode support Wenyou Yang
2016-01-28 10:19 ` Wenyou Yang
2016-01-28 10:19 ` Wenyou Yang
2016-01-28 10:19 ` [PATCH 1/4] ARM: at91: pm: create a separate procedure for the ULP0 mode Wenyou Yang
2016-01-28 10:19 ` Wenyou Yang
2016-01-28 10:19 ` Wenyou Yang
2016-01-28 10:19 ` [PATCH 2/4] ARM: at91: pm: add ULP1 mode support Wenyou Yang
2016-01-28 10:19 ` Wenyou Yang
2016-01-28 10:19 ` Wenyou Yang
2016-01-28 10:19 ` [PATCH 3/4] ARM: at91: pm: configure PMC fast startup signals Wenyou Yang
2016-01-28 10:19 ` Wenyou Yang
2016-01-28 10:19 ` Wenyou Yang
2016-01-28 10:19 ` [PATCH 4/4] Documentation: atmel-at91: add DT bindings for fast startup Wenyou Yang
2016-01-28 10:19 ` Wenyou Yang
2016-01-28 10:19 ` Wenyou Yang
2016-01-29 16:20 ` Rob Herring
2016-01-29 16:20 ` Rob Herring
2016-02-01 6:22 ` Yang, Wenyou
2016-02-01 6:22 ` Yang, Wenyou
2016-02-01 6:22 ` Yang, Wenyou
2016-02-01 6:22 ` Yang, Wenyou
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.