[PATCH V6 1/4] clocksource: imx-sysctr: Add internal clock divider handle

[PATCH V6 1/4] clocksource: imx-sysctr: Add internal clock divider handle

[Anson Huang]

The system counter block guide states that the base clock is
internally divided by 3 before use, that means the clock input of
system counter defined in DT should be base clock which is normally
from OSC, and then internally divided by 3 before use.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
No changes.
---
 drivers/clocksource/timer-imx-sysctr.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/clocksource/timer-imx-sysctr.c b/drivers/clocksource/timer-imx-sysctr.c
index fd7d680..b7c80a3 100644
--- a/drivers/clocksource/timer-imx-sysctr.c
+++ b/drivers/clocksource/timer-imx-sysctr.c
@@ -20,6 +20,8 @@
 #define SYS_CTR_EN		0x1
 #define SYS_CTR_IRQ_MASK	0x2
 
+#define SYS_CTR_CLK_DIV		0x3
+
 static void __iomem *sys_ctr_base;
 static u32 cmpcr;
 
@@ -134,6 +136,9 @@ static int __init sysctr_timer_init(struct device_node *np)
 	if (ret)
 		return ret;
 
+	/* system counter clock is divided by 3 internally */
+	to_sysctr.of_clk.rate /= SYS_CTR_CLK_DIV;
+
 	sys_ctr_base = timer_of_base(&to_sysctr);
 	cmpcr = readl(sys_ctr_base + CMPCR);
 	cmpcr &= ~SYS_CTR_EN;
-- 
2.7.4


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[PATCH V6 2/4] arm64: dts: imx8mm: Add system counter node

[Anson Huang]

Add i.MX8MM system counter node to enable timer-imx-sysctr
broadcast timer driver.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
No changes.
---
 arch/arm64/boot/dts/freescale/imx8mm.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
index ef66bb5..94433c53 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
@@ -572,6 +572,14 @@
 				#pwm-cells = <2>;
 				status = "disabled";
 			};
+
+			system_counter: timer@306a0000 {
+				compatible = "nxp,sysctr-timer";
+				reg = <0x306a0000 0x20000>;
+				interrupts = <GIC_SPI 47 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&osc_24m>;
+				clock-names = "per";
+			};
 		};
 
 		aips3: bus@30800000 {
-- 
2.7.4


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[PATCH V6 3/4] arm64: dts: imx8mq: Add system counter node

[Anson Huang]

Add i.MX8MQ system counter node to enable timer-imx-sysctr
broadcast timer driver.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
No changes.
---
 arch/arm64/boot/dts/freescale/imx8mq.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
index 7c68df6..4fdd60f 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
@@ -644,6 +644,14 @@
 				#pwm-cells = <2>;
 				status = "disabled";
 			};
+
+			system_counter: timer@306a0000 {
+				compatible = "nxp,sysctr-timer";
+				reg = <0x306a0000 0x20000>;
+				interrupts = <GIC_SPI 47 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&osc_25m>;
+				clock-names = "per";
+			};
 		};
 
 		bus@30800000 { /* AIPS3 */
-- 
2.7.4


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[PATCH V6 4/4] arm64: dts: imx8mm: Enable cpu-idle driver

[Anson Huang]

Enable i.MX8MM cpu-idle using generic ARM cpu-idle driver, 2 states
are supported, details as below:

root@imx8mmevk:~# cat /sys/devices/system/cpu/cpu0/cpuidle/state0/name
WFI
root@imx8mmevk:~# cat /sys/devices/system/cpu/cpu0/cpuidle/state0/usage
3973
root@imx8mmevk:~# cat /sys/devices/system/cpu/cpu0/cpuidle/state1/name
cpu-pd-wait
root@imx8mmevk:~# cat /sys/devices/system/cpu/cpu0/cpuidle/state1/usage
6647

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
Changes since V5:
	- improve state1 idle name to better match PSCI doc;
	- remove wakeup-latency-us property as it is NOT necessary when entry-latency-us/exit-latency-us
	  exist.
---
 arch/arm64/boot/dts/freescale/imx8mm.dtsi | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
index 94433c53..9b2dc12 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
@@ -44,6 +44,19 @@
 		#address-cells = <1>;
 		#size-cells = <0>;
 
+		idle-states {
+			entry-method = "psci";
+
+			cpu_pd_wait: cpu-pd-wait {
+				compatible = "arm,idle-state";
+				arm,psci-suspend-param = <0x0010033>;
+				local-timer-stop;
+				entry-latency-us = <1000>;
+				exit-latency-us = <700>;
+				min-residency-us = <2700>;
+			};
+		};
+
 		A53_0: cpu@0 {
 			device_type = "cpu";
 			compatible = "arm,cortex-a53";
@@ -56,6 +69,7 @@
 			nvmem-cells = <&cpu_speed_grade>;
 			nvmem-cell-names = "speed_grade";
 			#cooling-cells = <2>;
+			cpu-idle-states = <&cpu_pd_wait>;
 		};
 
 		A53_1: cpu@1 {
@@ -68,6 +82,7 @@
 			next-level-cache = <&A53_L2>;
 			operating-points-v2 = <&a53_opp_table>;
 			#cooling-cells = <2>;
+			cpu-idle-states = <&cpu_pd_wait>;
 		};
 
 		A53_2: cpu@2 {
@@ -80,6 +95,7 @@
 			next-level-cache = <&A53_L2>;
 			operating-points-v2 = <&a53_opp_table>;
 			#cooling-cells = <2>;
+			cpu-idle-states = <&cpu_pd_wait>;
 		};
 
 		A53_3: cpu@3 {
@@ -92,6 +108,7 @@
 			next-level-cache = <&A53_L2>;
 			operating-points-v2 = <&a53_opp_table>;
 			#cooling-cells = <2>;
+			cpu-idle-states = <&cpu_pd_wait>;
 		};
 
 		A53_L2: l2-cache0 {
-- 
2.7.4


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Re: [PATCH V6 4/4] arm64: dts: imx8mm: Enable cpu-idle driver

[Daniel Lezcano]

On 16/08/2019 02:38, Anson Huang wrote:
> Enable i.MX8MM cpu-idle using generic ARM cpu-idle driver, 2 states
> are supported, details as below:
> 
> root@imx8mmevk:~# cat /sys/devices/system/cpu/cpu0/cpuidle/state0/name
> WFI
> root@imx8mmevk:~# cat /sys/devices/system/cpu/cpu0/cpuidle/state0/usage
> 3973
> root@imx8mmevk:~# cat /sys/devices/system/cpu/cpu0/cpuidle/state1/name
> cpu-pd-wait
> root@imx8mmevk:~# cat /sys/devices/system/cpu/cpu0/cpuidle/state1/usage
> 6647
> 
> Signed-off-by: Anson Huang <Anson.Huang@nxp.com>

Hi Anson,

I've applied the patches 1-3 but this one does not apply.

You can either respin it against tip/timers/core and take it through
Shawn's tree. If the later, you can add my Acked-by.

  -- Daniel

-- 
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RE: [PATCH V6 4/4] arm64: dts: imx8mm: Enable cpu-idle driver

[Anson Huang]

Hi, Daniel/Shawn

> On 16/08/2019 02:38, Anson Huang wrote:
> > Enable i.MX8MM cpu-idle using generic ARM cpu-idle driver, 2 states
> > are supported, details as below:
> >
> > root@imx8mmevk:~# cat
> /sys/devices/system/cpu/cpu0/cpuidle/state0/name
> > WFI
> > root@imx8mmevk:~# cat
> > /sys/devices/system/cpu/cpu0/cpuidle/state0/usage
> > 3973
> > root@imx8mmevk:~# cat
> /sys/devices/system/cpu/cpu0/cpuidle/state1/name
> > cpu-pd-wait
> > root@imx8mmevk:~# cat
> > /sys/devices/system/cpu/cpu0/cpuidle/state1/usage
> > 6647
> >
> > Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
> 
> Hi Anson,
> 
> I've applied the patches 1-3 but this one does not apply.

Thanks.

> 
> You can either respin it against tip/timers/core and take it through Shawn's
> tree. If the later, you can add my Acked-by.

Hi, Shawn
	Can you take this patch and add below Acked-by? It should can be applied to your tree directly.

	Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>

Thanks,
Anson


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RE: [PATCH V6 4/4] arm64: dts: imx8mm: Enable cpu-idle driver

[Anson Huang]

Hi, Shawn

> > On 16/08/2019 02:38, Anson Huang wrote:
> > > Enable i.MX8MM cpu-idle using generic ARM cpu-idle driver, 2 states
> > > are supported, details as below:
> > >
> > > root@imx8mmevk:~# cat
> > /sys/devices/system/cpu/cpu0/cpuidle/state0/name
> > > WFI
> > > root@imx8mmevk:~# cat
> > > /sys/devices/system/cpu/cpu0/cpuidle/state0/usage
> > > 3973
> > > root@imx8mmevk:~# cat
> > /sys/devices/system/cpu/cpu0/cpuidle/state1/name
> > > cpu-pd-wait
> > > root@imx8mmevk:~# cat
> > > /sys/devices/system/cpu/cpu0/cpuidle/state1/usage
> > > 6647
> > >
> > > Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
> >
> > Hi Anson,
> >
> > I've applied the patches 1-3 but this one does not apply.
> 
> Thanks.
> 
> >
> > You can either respin it against tip/timers/core and take it through
> > Shawn's tree. If the later, you can add my Acked-by.
> 
> Hi, Shawn
> 	Can you take this patch and add below Acked-by? It should can be
> applied to your tree directly.
> 
> 	Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>

Sorry that I just found this patch can NOT be applied to your for-next tree neither, so
I redo the patch against your for-next tree, so you can just skip this patch series now
(as Daniel already picked the rest 3 patches) and take that patch I just sent, link as below:

https://patchwork.kernel.org/patch/11097471/

Thanks,
Anson

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