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From: Ulf Hansson <ulf.hansson@linaro.org>
To: "Rafael J . Wysocki" <rjw@rjwysocki.net>,
	Sudeep Holla <sudeep.holla@arm.com>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	linux-pm@vger.kernel.org
Cc: Kevin Hilman <khilman@kernel.org>,
	Lina Iyer <ilina@codeaurora.org>,
	Lina Iyer <lina.iyer@linaro.org>,
	Ulf Hansson <ulf.hansson@linaro.org>,
	Rob Herring <robh+dt@kernel.org>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Stephen Boyd <sboyd@kernel.org>, Juri Lelli <juri.lelli@arm.com>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	linux-arm-kernel@lists.infradead.org,
	linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v7 16/26] drivers: firmware: psci: Support hierarchical CPU idle states
Date: Thu, 12 Apr 2018 13:14:21 +0200	[thread overview]
Message-ID: <1523531671-27491-17-git-send-email-ulf.hansson@linaro.org> (raw)
In-Reply-To: <1523531671-27491-1-git-send-email-ulf.hansson@linaro.org>

From: Lina Iyer <lina.iyer@linaro.org>

Currently CPU's idle states are represented in a flattened model, via the
"cpu-idle-states" binding from within the CPU's device nodes.

Support the hierarchical layout, simply by converting to calling the new OF
helper, of_get_cpu_state_node().

Cc: Lina Iyer <ilina@codeaurora.org>
Suggested-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Lina Iyer <lina.iyer@linaro.org>
Co-developed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/firmware/psci/psci.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c
index 9788bfc..256b4ed 100644
--- a/drivers/firmware/psci/psci.c
+++ b/drivers/firmware/psci/psci.c
@@ -294,8 +294,7 @@ static int psci_dt_cpu_init_idle(struct device_node *cpu_node, int cpu)
 	struct device_node *state_node;
 
 	/* Count idle states */
-	while ((state_node = of_parse_phandle(cpu_node, "cpu-idle-states",
-					      count))) {
+	while ((state_node = of_get_cpu_state_node(cpu_node, count))) {
 		count++;
 		of_node_put(state_node);
 	}
@@ -308,7 +307,7 @@ static int psci_dt_cpu_init_idle(struct device_node *cpu_node, int cpu)
 		return -ENOMEM;
 
 	for (i = 0; i < count; i++) {
-		state_node = of_parse_phandle(cpu_node, "cpu-idle-states", i);
+		state_node = of_get_cpu_state_node(cpu_node, i);
 		ret = psci_dt_parse_state_node(state_node, &psci_states[i]);
 		of_node_put(state_node);
 
-- 
2.7.4

  parent reply	other threads:[~2018-04-12 11:14 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-12 11:14 [PATCH v7 00/26] PM / Domains: Support hierarchical CPU arrangement (PSCI/ARM) Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 01/26] PM / Domains: Don't treat zero found compatible idle states as an error Ulf Hansson
2018-04-16 17:33   ` Lina Iyer
2018-04-12 11:14 ` [PATCH v7 02/26] PM / Domains: Deal with multiple states but no governor in genpd Ulf Hansson
2018-04-16 17:34   ` Lina Iyer
2018-04-12 11:14 ` [PATCH v7 03/26] PM / Domains: Add generic data pointer to genpd_power_state struct Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 04/26] PM / Domains: Add support for CPU devices to genpd Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 05/26] PM / Domains: Add helper functions to attach/detach CPUs to/from genpd Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 06/26] timer: Export next wakeup time of a CPU Ulf Hansson
2018-04-13  8:47   ` Rafael J. Wysocki
2018-04-15 12:02     ` Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 07/26] PM / Domains: Add genpd governor for CPUs Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 08/26] PM / Domains: Extend genpd CPU governor to cope with QoS constraints Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 09/26] kernel/cpu_pm: Manage runtime PM in the idle path for CPUs Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 10/26] dt: psci: Update DT bindings to support hierarchical PSCI states Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 11/26] of: base: Add of_get_cpu_state_node() to get idle states for a CPU node Ulf Hansson
2018-04-13 15:05   ` Rob Herring
2018-04-15 11:59     ` Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 12/26] cpuidle: dt: Support hierarchical CPU idle states Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 13/26] drivers: firmware: psci: Move psci to separate directory Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 14/26] MAINTAINERS: Update files for PSCI Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 15/26] drivers: firmware: psci: Split psci_dt_cpu_init_idle() Ulf Hansson
2018-04-12 11:14 ` Ulf Hansson [this message]
2018-04-12 11:14 ` [PATCH v7 17/26] drivers: firmware: psci: Simplify error path of psci_dt_init() Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 18/26] drivers: firmware: psci: Announce support for OS initiated suspend mode Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 19/26] drivers: firmware: psci: Prepare to use " Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 20/26] drivers: firmware: psci: Share a few internal PSCI functions Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 21/26] drivers: firmware: psci: Add support for PM domains using genpd Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 22/26] drivers: firmware: psci: Introduce psci_dt_topology_init() Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 23/26] drivers: firmware: psci: Try to attach CPU devices to their PM domains Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 24/26] drivers: firmware: psci: Deal with CPU hotplug when using OSI mode Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 25/26] arm64: kernel: Respect the hierarchical CPU topology in DT for PSCI Ulf Hansson
2018-04-12 11:14 ` [PATCH v7 26/26] arm64: dts: Convert to the hierarchical CPU topology layout for MSM8916 Ulf Hansson
2018-05-24  9:16 ` [PATCH v7 00/26] PM / Domains: Support hierarchical CPU arrangement (PSCI/ARM) Ulf Hansson

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