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add patches to support the advanced power management on Kirkwood socs

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SVN-Revision: 16250
This commit is contained in:
Imre Kaloz 2009-06-01 12:51:19 +00:00
parent 5bf5036c0c
commit 58579bca65
2 changed files with 278 additions and 0 deletions
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132
target/linux/kirkwood/patches/003-gating.patch Normal file
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From: Rabeeh Khoury <rabeeh@marvell.com>
Date: Sun, 22 Mar 2009 15:30:32 +0000 (+0200)
Subject: [ARM] Kirkwood: peripherals clock gating for power management
X-Git-Url: http://git.marvell.com/?p=orion.git;a=commitdiff_plain;h=c0c3df02efed0e5dea9aa4d8313e06e1f68f2cb4;hp=039b97666e1335eac517c7d35a0fa1143af689f0
[ARM] Kirkwood: peripherals clock gating for power management
1. Enabling clock gating of unused peripherals
2. PLL and PHY of the units are also disabled (when possible.
Signed-off-by: Rabeeh Khoury <rabeeh@marvell.com>
[ This needs to be revisited to make power handling dynamic and per device. -- Nico ]
---
--- a/arch/arm/mach-kirkwood/common.c
+++ b/arch/arm/mach-kirkwood/common.c
@@ -788,6 +788,38 @@ static void __init kirkwood_l2_init(void
#endif
}
+void __init kirkwood_clock_gate(u32 reg)
+{
+ printk(KERN_INFO "Kirkwood: Gating clock using mask 0x%x\n", reg);
+ /* First make sure that the units are accessible */
+ writel(readl(CLOCK_GATING_CTRL) | reg, CLOCK_GATING_CTRL);
+ /* For SATA first shutdown the phy */
+ if (reg & CGC_SATA0) {
+ /* Disable PLL and IVREF */
+ writel(readl(SATA0_PHY_MODE_2) & ~0xf, SATA0_PHY_MODE_2);
+ /* Disable PHY */
+ writel(readl(SATA0_IF_CTRL) | 0x200, SATA0_IF_CTRL);
+ }
+ if (reg & CGC_SATA1) {
+ /* Disable PLL and IVREF */
+ writel(readl(SATA1_PHY_MODE_2) & ~0xf, SATA1_PHY_MODE_2);
+ /* Disable PHY */
+ writel(readl(SATA1_IF_CTRL) | 0x200, SATA1_IF_CTRL);
+ }
+ /* For PCI-E first shutdown the phy */
+ if (reg & CGC_PEX0) {
+ writel(readl(PCIE_LINK_CTRL) | 0x10, PCIE_LINK_CTRL);
+ while (1) {
+ if (readl(PCIE_STATUS) & 0x1)
+ break;
+ }
+ writel(readl(PCIE_LINK_CTRL) & ~0x10, PCIE_LINK_CTRL);
+ }
+ /* Now gate clock the required units */
+ writel(readl(CLOCK_GATING_CTRL) & ~reg, CLOCK_GATING_CTRL);
+ return;
+}
+
void __init kirkwood_init(void)
{
printk(KERN_INFO "Kirkwood: %s, TCLK=%d.\n",
--- a/arch/arm/mach-kirkwood/common.h
+++ b/arch/arm/mach-kirkwood/common.h
@@ -22,6 +22,7 @@ struct mvsdio_platform_data;
void kirkwood_map_io(void);
void kirkwood_init(void);
void kirkwood_init_irq(void);
+void __init kirkwood_clock_gate(u32 reg);
extern struct mbus_dram_target_info kirkwood_mbus_dram_info;
void kirkwood_setup_cpu_mbus(void);
--- a/arch/arm/mach-kirkwood/include/mach/bridge-regs.h
+++ b/arch/arm/mach-kirkwood/include/mach/bridge-regs.h
@@ -39,4 +39,20 @@
#define L2_CONFIG_REG (BRIDGE_VIRT_BASE | 0x0128)
#define L2_WRITETHROUGH 0x00000010
+#define CLOCK_GATING_CTRL (BRIDGE_VIRT_BASE | 0x11c)
+#define CGC_GE0 0x1
+#define CGC_PEX0 0x4
+#define CGC_USB0 0x8
+#define CGC_SDIO 0x10
+#define CGC_TSU 0x20
+#define CGC_NAND_SPI 0x80
+#define CGC_XOR0 0x100
+#define CGC_AUDIO 0x200
+#define CGC_SATA0 0x4000
+#define CGC_SATA1 0x8000
+#define CGC_XOR1 0x10000
+#define CGC_CRYPTO 0x20000
+#define CGC_GE1 0x80000
+#define CGC_TDM 0x100000
+
#endif
--- a/arch/arm/mach-kirkwood/include/mach/kirkwood.h
+++ b/arch/arm/mach-kirkwood/include/mach/kirkwood.h
@@ -64,6 +64,8 @@
#define BRIDGE_VIRT_BASE (KIRKWOOD_REGS_VIRT_BASE | 0x20000)
#define PCIE_VIRT_BASE (KIRKWOOD_REGS_VIRT_BASE | 0x40000)
+#define PCIE_LINK_CTRL (PCIE_VIRT_BASE | 0x70)
+#define PCIE_STATUS (PCIE_VIRT_BASE | 0x1a04)
#define USB_PHYS_BASE (KIRKWOOD_REGS_PHYS_BASE | 0x50000)
@@ -80,6 +82,11 @@
#define GE01_PHYS_BASE (KIRKWOOD_REGS_PHYS_BASE | 0x74000)
#define SATA_PHYS_BASE (KIRKWOOD_REGS_PHYS_BASE | 0x80000)
+#define SATA_VIRT_BASE (KIRKWOOD_REGS_VIRT_BASE | 0x80000)
+#define SATA0_IF_CTRL (SATA_VIRT_BASE | 0x2050)
+#define SATA0_PHY_MODE_2 (SATA_VIRT_BASE | 0x2330)
+#define SATA1_IF_CTRL (SATA_VIRT_BASE | 0x4050)
+#define SATA1_PHY_MODE_2 (SATA_VIRT_BASE | 0x4330)
#define SDIO_PHYS_BASE (KIRKWOOD_REGS_PHYS_BASE | 0x90000)
--- a/arch/arm/mach-kirkwood/sheevaplug-setup.c
+++ b/arch/arm/mach-kirkwood/sheevaplug-setup.c
@@ -19,6 +19,7 @@
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <mach/kirkwood.h>
+#include <mach/bridge-regs.h>
#include <plat/mvsdio.h>
#include <plat/orion_nand.h>
#include "common.h"
@@ -122,6 +123,8 @@ static void __init sheevaplug_init(void)
platform_device_register(&sheevaplug_nand_flash);
platform_device_register(&sheevaplug_leds);
+ kirkwood_clock_gate(CGC_PEX0 | CGC_TSU | CGC_AUDIO | CGC_SATA0 |\
+ CGC_SATA1 | CGC_CRYPTO | CGC_GE1 | CGC_TDM);
}
MACHINE_START(SHEEVAPLUG, "Marvell SheevaPlug Reference Board")

146
target/linux/kirkwood/patches/004-cpuidle.patch Normal file
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From: Rabeeh Khoury <rabeeh@marvell.com>
Date: Tue, 24 Mar 2009 14:10:15 +0000 (+0200)
Subject: [ARM] Kirkwood: CPU idle driver
X-Git-Url: http://git.marvell.com/?p=orion.git;a=commitdiff_plain;h=039b97666e1335eac517c7d35a0fa1143af689f0;hp=56a50adda49b2020156616c4eb15353e0f9ad7de
[ARM] Kirkwood: CPU idle driver
The patch adds support for Kirkwood cpu idle.
Two idle states are defined:
1. Wait-for-interrupt (replacing default kirkwood wfi)
2. Wait-for-interrupt and DDR self refresh
Signed-off-by: Rabeeh Khoury <rabeeh@marvell.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
---
--- a/arch/arm/configs/kirkwood_defconfig
+++ b/arch/arm/configs/kirkwood_defconfig
@@ -270,7 +270,9 @@ CONFIG_CMDLINE=""
#
# CPU Power Management
#
-# CONFIG_CPU_IDLE is not set
+CONFIG_CPU_IDLE=y
+CONFIG_CPU_IDLE_GOV_LADDER=y
+CONFIG_CPU_IDLE_GOV_MENU=y
#
# Floating point emulation
--- a/arch/arm/mach-kirkwood/Makefile
+++ b/arch/arm/mach-kirkwood/Makefile
@@ -5,3 +5,5 @@ obj-$(CONFIG_MACH_RD88F6192_NAS) += rd88
obj-$(CONFIG_MACH_RD88F6281) += rd88f6281-setup.o
obj-$(CONFIG_MACH_SHEEVAPLUG) += sheevaplug-setup.o
obj-$(CONFIG_MACH_TS219) += ts219-setup.o
+
+obj-$(CONFIG_CPU_IDLE) += cpuidle.o
--- /dev/null
+++ b/arch/arm/mach-kirkwood/cpuidle.c
@@ -0,0 +1,96 @@
+/*
+ * arch/arm/mach-kirkwood/cpuidle.c
+ *
+ * CPU idle Marvell Kirkwood SoCs
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ *
+ * The cpu idle uses wait-for-interrupt and DDR self refresh in order
+ * to implement two idle states -
+ * #1 wait-for-interrupt
+ * #2 wait-for-interrupt and DDR self refresh
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/cpuidle.h>
+#include <asm/io.h>
+#include <asm/proc-fns.h>
+#include <mach/kirkwood.h>
+
+#define KIRKWOOD_MAX_STATES 2
+
+static struct cpuidle_driver kirkwood_idle_driver = {
+ .name = "kirkwood_idle",
+ .owner = THIS_MODULE,
+};
+
+static DEFINE_PER_CPU(struct cpuidle_device, kirkwood_cpuidle_device);
+
+/* Actual code that puts the SoC in different idle states */
+static int kirkwood_enter_idle(struct cpuidle_device *dev,
+ struct cpuidle_state *state)
+{
+ struct timeval before, after;
+ int idle_time;
+
+ local_irq_disable();
+ do_gettimeofday(&before);
+ if (state == &dev->states[0])
+ /* Wait for interrupt state */
+ cpu_do_idle();
+ else if (state == &dev->states[1]) {
+ /*
+ * Following write will put DDR in self refresh.
+ * Note that we have 256 cycles before DDR puts it
+ * self in self-refresh, so the wait-for-interrupt
+ * call afterwards won't get the DDR from self refresh
+ * mode.
+ */
+ writel(0x7, DDR_OPERATION_BASE);
+ cpu_do_idle();
+ }
+ do_gettimeofday(&after);
+ local_irq_enable();
+ idle_time = (after.tv_sec - before.tv_sec) * USEC_PER_SEC +
+ (after.tv_usec - before.tv_usec);
+ return idle_time;
+}
+
+/* Initialize CPU idle by registering the idle states */
+static int kirkwood_init_cpuidle(void)
+{
+ struct cpuidle_device *device;
+
+ cpuidle_register_driver(&kirkwood_idle_driver);
+
+ device = &per_cpu(kirkwood_cpuidle_device, smp_processor_id());
+ device->state_count = KIRKWOOD_MAX_STATES;
+
+ /* Wait for interrupt state */
+ device->states[0].enter = kirkwood_enter_idle;
+ device->states[0].exit_latency = 1;
+ device->states[0].target_residency = 10000;
+ device->states[0].flags = CPUIDLE_FLAG_TIME_VALID;
+ strcpy(device->states[0].name, "WFI");
+ strcpy(device->states[0].desc, "Wait for interrupt");
+
+ /* Wait for interrupt and DDR self refresh state */
+ device->states[1].enter = kirkwood_enter_idle;
+ device->states[1].exit_latency = 10;
+ device->states[1].target_residency = 10000;
+ device->states[1].flags = CPUIDLE_FLAG_TIME_VALID;
+ strcpy(device->states[1].name, "DDR SR");
+ strcpy(device->states[1].desc, "WFI and DDR Self Refresh");
+
+ if (cpuidle_register_device(device)) {
+ printk(KERN_ERR "kirkwood_init_cpuidle: Failed registering\n");
+ return -EIO;
+ }
+ return 0;
+}
+
+device_initcall(kirkwood_init_cpuidle);
--- a/arch/arm/mach-kirkwood/include/mach/kirkwood.h
+++ b/arch/arm/mach-kirkwood/include/mach/kirkwood.h
@@ -48,6 +48,7 @@
*/
#define DDR_VIRT_BASE (KIRKWOOD_REGS_VIRT_BASE | 0x00000)
#define DDR_WINDOW_CPU_BASE (DDR_VIRT_BASE | 0x1500)
+#define DDR_OPERATION_BASE (DDR_VIRT_BASE | 0x1418)
#define DEV_BUS_PHYS_BASE (KIRKWOOD_REGS_PHYS_BASE | 0x10000)
#define DEV_BUS_VIRT_BASE (KIRKWOOD_REGS_VIRT_BASE | 0x10000)