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From: Grygorii Strashko <grygorii.strashko-l0cyMroinI0@public.gmane.org>
To: tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org
Cc: slash.tmp-GANU6spQydw@public.gmane.org,
	nsekhar-l0cyMroinI0@public.gmane.org,
	t-kristo-l0cyMroinI0@public.gmane.org,
	linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Grygorii Strashko
	<grygorii.strashko-l0cyMroinI0@public.gmane.org>,
	Felipe Balbi <balbi-l0cyMroinI0@public.gmane.org>,
	Santosh Shilimkar
	<ssantosh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Subject: [4.4-rc][PATCH] ARM: dts: am4372: disable arm twd and global timer's nodes
Date: Wed, 18 Nov 2015 16:01:55 +0200	[thread overview]
Message-ID: <1447855315-419-1-git-send-email-grygorii.strashko@ti.com> (raw)

Keep ARM TWD and Global timer's nodes disabled by default - if someone
would like to use them then those nodes have to be enabled explicitly
in board file.

The reason for this change is:
- ARM TWD is not always-on timer on am437x and it will stop in low
  CPUIdle states and, therefore, broadcast timer has to configured
  properly if CPU_IDLE=y.
- ARM Global timer is not always-on timer on am437x and it can't be
  used as clocksource device if CPU_IDLE=y.
- ARM Global timer driver doesn't support CPUfreq now.

Cc: Felipe Balbi <balbi-l0cyMroinI0@public.gmane.org>
Cc: Santosh Shilimkar <ssantosh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Signed-off-by: Grygorii Strashko <grygorii.strashko-l0cyMroinI0@public.gmane.org>
---
 arch/arm/boot/dts/am4372.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/am4372.dtsi b/arch/arm/boot/dts/am4372.dtsi
index d83ff9c..11376e3 100644
--- a/arch/arm/boot/dts/am4372.dtsi
+++ b/arch/arm/boot/dts/am4372.dtsi
@@ -75,6 +75,7 @@
 		interrupts = <GIC_PPI 11 IRQ_TYPE_LEVEL_HIGH>;
 		interrupt-parent = <&gic>;
 		clocks = <&dpll_mpu_m2_ck>;
+		status = "disabled";
 	};
 
 	local_timer: timer@48240600 {
@@ -83,6 +84,7 @@
 		interrupts = <GIC_PPI 13 IRQ_TYPE_LEVEL_HIGH>;
 		interrupt-parent = <&gic>;
 		clocks = <&dpll_mpu_m2_ck>;
+		status = "disabled";
 	};
 
 	l2-cache-controller@48242000 {
-- 
2.6.3

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             reply	other threads:[~2015-11-18 14:01 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-18 14:01 Grygorii Strashko [this message]
     [not found] ` <1447855315-419-1-git-send-email-grygorii.strashko-l0cyMroinI0@public.gmane.org>
2015-11-18 14:15   ` [4.4-rc][PATCH] ARM: dts: am4372: disable arm twd and global timer's nodes Mark Rutland
2015-11-18 15:35     ` Grygorii Strashko
     [not found]       ` <564C9ACF.6040107-l0cyMroinI0@public.gmane.org>
2015-12-03 16:33         ` Tony Lindgren
     [not found]           ` <20151203163311.GP23396-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
2015-12-03 16:37             ` Tony Lindgren
     [not found]               ` <20151203163708.GR23396-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
2015-12-03 18:20                 ` Grygorii Strashko
     [not found]                   ` <566087DD.2040006-l0cyMroinI0@public.gmane.org>
2015-12-03 19:23                     ` Tony Lindgren

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