From: "Andreas Färber" <afaerber@suse.de>
To: linux-arm-kernel@lists.infradead.org
Cc: mp-cs@actions-semi.com,
"Thomas Liau" <thomas.liau@actions-semi.com>,
张东风 <zhangdf@actions-semi.com>, 刘炜 <liuwei@actions-semi.com>,
张天益 <tyzhang@actions-semi.com>,
96boards@ucrobotics.com, support@lemaker.org,
linux-kernel@vger.kernel.org, "Andreas Färber" <afaerber@suse.de>,
"Russell King" <linux@armlinux.org.uk>
Subject: [PATCH v4 28/28] ARM: owl: smp: Implement SPS power-gating for CPU2 and CPU3
Date: Tue, 6 Jun 2017 02:54:26 +0200 [thread overview]
Message-ID: <20170606005426.26446-29-afaerber@suse.de> (raw)
In-Reply-To: <20170606005426.26446-1-afaerber@suse.de>
Bring up the two remaining CPUs by calling into PM domain code.
Signed-off-by: Andreas Färber <afaerber@suse.de>
---
v3 -> v4:
* Reused PM domain helper code to avoid code duplication
v3: new
arch/arm/mach-actions/Kconfig | 1 +
arch/arm/mach-actions/platsmp.c | 36 ++++++++++++++++++++++++++++++++++--
2 files changed, 35 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-actions/Kconfig b/arch/arm/mach-actions/Kconfig
index 717adc1630a1..ad9c5c89c683 100644
--- a/arch/arm/mach-actions/Kconfig
+++ b/arch/arm/mach-actions/Kconfig
@@ -10,6 +10,7 @@ menuconfig ARCH_ACTIONS
select GENERIC_IRQ_CHIP
select HAVE_ARM_SCU if SMP
select HAVE_ARM_TWD if SMP
+ select OWL_PM_DOMAINS_HELPER
select OWL_TIMER
help
This enables support for the Actions Semiconductor S500 SoC family.
diff --git a/arch/arm/mach-actions/platsmp.c b/arch/arm/mach-actions/platsmp.c
index 9d3601ebe535..b4806ce0e9bb 100644
--- a/arch/arm/mach-actions/platsmp.c
+++ b/arch/arm/mach-actions/platsmp.c
@@ -19,6 +19,7 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/smp.h>
+#include <linux/soc/actions/owl-sps.h>
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
#include <asm/smp_scu.h>
@@ -28,7 +29,13 @@
#define OWL_CPUx_FLAG_BOOT 0x55aa
+#define OWL_SPS_PG_CTL_PWR_CPU2 BIT(5)
+#define OWL_SPS_PG_CTL_PWR_CPU3 BIT(6)
+#define OWL_SPS_PG_CTL_ACK_CPU2 BIT(21)
+#define OWL_SPS_PG_CTL_ACK_CPU3 BIT(22)
+
static void __iomem *scu_base_addr;
+static void __iomem *sps_base_addr;
static void __iomem *timer_base_addr;
static int ncores;
@@ -58,14 +65,27 @@ void owl_secondary_startup(void);
static int s500_wakeup_secondary(unsigned int cpu)
{
+ int ret;
+
if (cpu > 3)
return -EINVAL;
+ /* The generic PM domain driver is not available this early. */
switch (cpu) {
case 2:
+ ret = owl_sps_set_pg(sps_base_addr,
+ OWL_SPS_PG_CTL_PWR_CPU2,
+ OWL_SPS_PG_CTL_ACK_CPU2, true);
+ if (ret)
+ return ret;
+ break;
case 3:
- /* CPU2/3 are power-gated */
- return -EINVAL;
+ ret = owl_sps_set_pg(sps_base_addr,
+ OWL_SPS_PG_CTL_PWR_CPU3,
+ OWL_SPS_PG_CTL_ACK_CPU3, true);
+ if (ret)
+ return ret;
+ break;
}
/* wait for CPUx to run to WFE instruction */
@@ -133,6 +153,18 @@ static void __init s500_smp_prepare_cpus(unsigned int max_cpus)
return;
}
+ node = of_find_compatible_node(NULL, NULL, "actions,s500-sps");
+ if (!node) {
+ pr_err("%s: missing sps\n", __func__);
+ return;
+ }
+
+ sps_base_addr = of_iomap(node, 0);
+ if (!sps_base_addr) {
+ pr_err("%s: could not map sps registers\n", __func__);
+ return;
+ }
+
if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A9) {
node = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-scu");
if (!node) {
--
2.12.3
prev parent reply other threads:[~2017-06-06 0:56 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-06 0:53 [PATCH v4 00/28] ARM: Initial Actions Semi S500 and S900 enablement Andreas Färber
2017-06-06 0:53 ` [PATCH v4 01/28] dt-bindings: Add vendor prefix for Actions Semi Andreas Färber
2017-06-18 18:46 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 02/28] dt-bindings: arm: Document Actions Semi S500 Andreas Färber
2017-06-18 18:48 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 03/28] dt-bindings: timer: Document Owl timer Andreas Färber
2017-06-18 20:18 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 04/28] clocksource: Add " Andreas Färber
2017-06-06 16:33 ` Daniel Lezcano
2017-06-18 20:43 ` Andreas Färber
2017-06-19 13:53 ` Daniel Lezcano
2017-06-19 14:31 ` Andreas Färber
2017-06-21 11:57 ` Daniel Lezcano
2017-06-06 0:54 ` [PATCH v4 05/28] clocksource: owl: Add S900 support Andreas Färber
2017-06-06 16:34 ` Daniel Lezcano
2017-06-18 20:50 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 06/28] ARM: Prepare Actions Semi S500 Andreas Färber
2017-06-18 21:21 ` Andreas Färber
2017-07-01 21:41 ` [PATCH] ARM: owl: Drop custom machine Andreas Färber
2017-06-06 0:54 ` [PATCH v4 07/28] ARM64: Prepare Actions Semi S900 Andreas Färber
2017-06-11 13:04 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 08/28] dt-bindings: serial: Document Actions Semi Owl UARTs Andreas Färber
2017-06-06 0:54 ` [PATCH v4 09/28] tty: serial: Add Actions Semi Owl UART earlycon Andreas Färber
2017-06-18 21:45 ` Andreas Färber
2017-06-19 1:16 ` Greg Kroah-Hartman
2017-06-19 1:24 ` Andreas Färber
2017-06-19 1:46 ` [PATCH v5 07/26] dt-bindings: serial: Document Actions Semi Owl UARTs Andreas Färber
2017-06-19 1:46 ` [PATCH v5 08/26] tty: serial: Add Actions Semi Owl UART earlycon Andreas Färber
2017-06-19 2:12 ` [PATCH v4 09/28] " Greg Kroah-Hartman
2017-06-19 2:26 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 10/28] Documentation: kernel-parameters: Document owl earlycon Andreas Färber
2017-06-06 0:54 ` [PATCH v4 11/28] ARM: dts: Add Actions Semi S500 and LeMaker Guitar Andreas Färber
2017-06-18 22:10 ` Andreas Färber
2017-06-19 1:08 ` [PATCH v5 10/27] " Andreas Färber
2017-06-19 2:01 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 12/28] dt-bindings: Add vendor prefix for uCRobotics Andreas Färber
2017-06-18 22:19 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 13/28] dt-bindings: arm: Document Actions Semi S900 Andreas Färber
2017-06-18 22:29 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 14/28] ARM64: dts: Add Actions Semi S900 and Bubblegum-96 Andreas Färber
2017-06-18 22:40 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 15/28] MAINTAINERS: Add Actions Semi Owl section Andreas Färber
2017-06-18 22:49 ` Andreas Färber
2017-06-19 2:44 ` [PATCH v5 13/26] " Andreas Färber
2017-06-26 6:56 ` 答复: " 张天益
2017-06-06 0:54 ` [PATCH v4 16/28] tty: serial: owl: Implement console driver Andreas Färber
2017-06-06 13:34 ` Alan Cox
2017-07-02 20:27 ` Andreas Färber
2017-06-07 14:37 ` Andy Shevchenko
2017-07-02 22:36 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 17/28] ARM64: dts: actions: s900-bubblegum-96: Add fake uart5 clock Andreas Färber
2017-09-05 21:29 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 18/28] ARM: dts: s500-guitar-bb-rev-b: Add fake uart3 clock Andreas Färber
2017-09-05 21:37 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 19/28] dt-bindings: arm: cpus: Add S500 enable-method Andreas Färber
2017-06-19 2:09 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 20/28] ARM: owl: Implement CPU enable-method for S500 Andreas Färber
2017-06-19 2:11 ` Andreas Färber
2017-06-21 8:16 ` Arnd Bergmann
2017-06-21 10:25 ` Arnd Bergmann
2017-06-21 16:48 ` Andreas Färber
2017-06-21 18:02 ` Arnd Bergmann
2017-06-29 15:07 ` Arnd Bergmann
2017-06-29 15:22 ` Andreas Färber
2017-06-29 15:50 ` Arnd Bergmann
2017-07-01 21:29 ` [PATCH] ARM: owl: smp: Drop bogus holding pen Andreas Färber
2017-07-03 12:35 ` Arnd Bergmann
2017-07-01 4:42 ` 答复: [PATCH v4 20/28] ARM: owl: Implement CPU enable-method for S500 刘炜
2017-07-01 19:56 ` Andreas Färber
2017-07-03 8:13 ` 刘炜
2017-07-04 23:32 ` [PATCH] ARM: owl: smp: Drop owl_secondary_boot() Andreas Färber
2017-07-05 2:36 ` Florian Fainelli
2017-07-06 17:17 ` Andreas Färber
2017-07-06 17:38 ` Alexandre Belloni
2017-07-06 19:47 ` Florian Fainelli
2017-07-07 7:34 ` Gregory CLEMENT
2017-07-07 17:32 ` Florian Fainelli
2017-07-06 17:39 ` Mark Rutland
2017-07-06 21:16 ` Florian Fainelli
2017-07-09 21:55 ` Andreas Färber
2017-07-10 4:27 ` Florian Fainelli
2017-06-06 0:54 ` [PATCH v4 21/28] ARM: dts: s500: Set CPU enable-method Andreas Färber
2017-06-19 2:09 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 22/28] dt-bindings: power: Add Owl SPS power domains Andreas Färber
2017-06-19 3:36 ` [PATCH v5 20/26] " Andreas Färber
2017-06-19 3:57 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 23/28] soc: actions: Add Owl SPS Andreas Färber
2017-06-19 3:40 ` [PATCH v5 21/26] " Andreas Färber
2017-06-19 3:59 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 24/28] MAINTAINERS: Update Actions Semi section with SPS Andreas Färber
2017-06-19 3:44 ` [PATCH v5 22/26] " Andreas Färber
2017-06-19 4:00 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 25/28] ARM: dts: s500: Add SPS node Andreas Färber
2017-06-19 4:01 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 26/28] ARM: dts: s500: Set power domains for CPU2 and CPU3 Andreas Färber
2017-07-27 20:58 ` Andreas Färber
2017-06-06 0:54 ` [PATCH v4 27/28] soc: actions: owl-sps: Factor out owl_sps_set_pg() for power-gating Andreas Färber
2017-06-19 4:12 ` Andreas Färber
2017-06-06 0:54 ` Andreas Färber [this message]
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