linaro-dev October 2010

linaro-dev@lists.linaro.org

68 participants
90 discussions

by John Rigby

The following changes since commit 8a9363c166dbe07bbb9f719a97e90d271f2789e5: LINARO: Linaro-2.6.35.1007.12 (2010-10-11 12:45:09 -0600) are available in the git repository at: git://git.linaro.org/ubuntu/linux-meta-linaro.git master John Rigby (1): LINARO: Linaro-2.6.35.1008.13 meta-source/debian/changelog | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-)

14 years, 1 month

[PATCHv5] cpufreq for freescale mx51

by yong.shen＠linaro.org

From: Yong Shen <yong.shen(a)linaro.org> Currently, only two operating points: 160Mhz and 800Mhz. the operating points are tested on babbage 3.0 Signed-off-by: Yong Shen <yong.shen(a)linaro.org> --- arch/arm/Kconfig | 6 + arch/arm/mach-mx5/Kconfig | 1 + arch/arm/mach-mx5/Makefile | 1 + arch/arm/mach-mx5/board-mx51_babbage.c | 6 +- arch/arm/mach-mx5/clock-mx51.c | 22 +++- arch/arm/mach-mx5/cpu_op-mx51.c | 29 +++++ arch/arm/mach-mx5/cpu_op-mx51.h | 14 ++ arch/arm/plat-mxc/Makefile | 1 + arch/arm/plat-mxc/cpufreq.c | 206 ++++++++++++++++++++++++++++++++ arch/arm/plat-mxc/include/mach/mxc.h | 13 ++- 10 files changed, 295 insertions(+), 4 deletions(-) create mode 100644 arch/arm/mach-mx5/cpu_op-mx51.c create mode 100644 arch/arm/mach-mx5/cpu_op-mx51.h create mode 100644 arch/arm/plat-mxc/cpufreq.c diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 553b7cf..12115ff 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1584,6 +1584,12 @@ if ARCH_HAS_CPUFREQ source "drivers/cpufreq/Kconfig" +config CPU_FREQ_IMX + tristate "CPUfreq driver for i.MX CPUs" + depends on ARCH_MXC && CPU_FREQ + help + This enables the CPUfreq driver for i.MX CPUs. + config CPU_FREQ_SA1100 bool diff --git a/arch/arm/mach-mx5/Kconfig b/arch/arm/mach-mx5/Kconfig index a2df9ac..427a66c 100644 --- a/arch/arm/mach-mx5/Kconfig +++ b/arch/arm/mach-mx5/Kconfig @@ -6,6 +6,7 @@ config ARCH_MX51 select MXC_TZIC select ARCH_MXC_IOMUX_V3 select ARCH_MXC_AUDMUX_V2 + select ARCH_HAS_CPUFREQ comment "MX5 platforms:" diff --git a/arch/arm/mach-mx5/Makefile b/arch/arm/mach-mx5/Makefile index 1769c16..462f177 100644 --- a/arch/arm/mach-mx5/Makefile +++ b/arch/arm/mach-mx5/Makefile @@ -5,6 +5,7 @@ # Object file lists. obj-y := cpu.o mm.o clock-mx51.o devices.o +obj-$(CONFIG_CPU_FREQ_IMX) += cpu_op-mx51.o obj-$(CONFIG_MACH_MX51_BABBAGE) += board-mx51_babbage.o obj-$(CONFIG_MACH_MX51_3DS) += board-mx51_3ds.o obj-$(CONFIG_MACH_EUKREA_CPUIMX51) += board-cpuimx51.o diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c index 23ee4a4..26b8e14 100644 --- a/arch/arm/mach-mx5/board-mx51_babbage.c +++ b/arch/arm/mach-mx5/board-mx51_babbage.c @@ -1,5 +1,5 @@ /* - * Copyright 2009 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved. * Copyright (C) 2009-2010 Amit Kucheria <amit.kucheria(a)canonical.com> * * The code contained herein is licensed under the GNU General Public @@ -32,6 +32,7 @@ #include "devices-imx51.h" #include "devices.h" +#include "cpu_op-mx51.h" #define BABBAGE_USB_HUB_RESET (0*32 + 7) /* GPIO_1_7 */ #define BABBAGE_USBH1_STP (0*32 + 27) /* GPIO_1_27 */ @@ -282,6 +283,9 @@ static void __init mxc_board_init(void) { struct pad_desc usbh1stp = MX51_PAD_USBH1_STP__USBH1_STP; +#if defined(CONFIG_CPU_FREQ_IMX) + get_cpu_op = mx51_get_cpu_op; +#endif mxc_iomux_v3_setup_multiple_pads(mx51babbage_pads, ARRAY_SIZE(mx51babbage_pads)); mxc_init_imx_uart(); diff --git a/arch/arm/mach-mx5/clock-mx51.c b/arch/arm/mach-mx5/clock-mx51.c index f2aae92..8ac36d8 100644 --- a/arch/arm/mach-mx5/clock-mx51.c +++ b/arch/arm/mach-mx5/clock-mx51.c @@ -362,7 +362,7 @@ static int _clk_lp_apm_set_parent(struct clk *clk, struct clk *parent) return 0; } -static unsigned long clk_arm_get_rate(struct clk *clk) +static unsigned long clk_cpu_get_rate(struct clk *clk) { u32 cacrr, div; unsigned long parent_rate; @@ -374,6 +374,22 @@ static unsigned long clk_arm_get_rate(struct clk *clk) return parent_rate / div; } +static int clk_cpu_set_rate(struct clk *clk, unsigned long rate) +{ + u32 reg, cpu_podf; + unsigned long parent_rate; + + parent_rate = clk_get_rate(clk->parent); + cpu_podf = parent_rate / rate - 1; + /* use post divider to change freq */ + reg = __raw_readl(MXC_CCM_CACRR); + reg &= ~MXC_CCM_CACRR_ARM_PODF_MASK; + reg |= cpu_podf << MXC_CCM_CACRR_ARM_PODF_OFFSET; + __raw_writel(reg, MXC_CCM_CACRR); + + return 0; +} + static int _clk_periph_apm_set_parent(struct clk *clk, struct clk *parent) { u32 reg, mux; @@ -736,7 +752,8 @@ static struct clk periph_apm_clk = { static struct clk cpu_clk = { .parent = &pll1_sw_clk, - .get_rate = clk_arm_get_rate, + .get_rate = clk_cpu_get_rate, + .set_rate = clk_cpu_set_rate, }; static struct clk ahb_clk = { @@ -1064,6 +1081,7 @@ static struct clk_lookup lookups[] = { _REGISTER_CLOCK("imx51-cspi.0", NULL, cspi_clk) _REGISTER_CLOCK("sdhci-esdhc-imx.0", NULL, esdhc1_clk) _REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc2_clk) + _REGISTER_CLOCK(NULL, "cpu_clk", cpu_clk) }; static void clk_tree_init(void) diff --git a/arch/arm/mach-mx5/cpu_op-mx51.c b/arch/arm/mach-mx5/cpu_op-mx51.c new file mode 100644 index 0000000..9d34c3d --- /dev/null +++ b/arch/arm/mach-mx5/cpu_op-mx51.c @@ -0,0 +1,29 @@ +/* + * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include <linux/types.h> +#include <mach/hardware.h> +#include <linux/kernel.h> + +static struct cpu_op mx51_cpu_op[] = { + { + .cpu_rate = 160000000,}, + { + .cpu_rate = 800000000,}, +}; + +struct cpu_op *mx51_get_cpu_op(int *op) +{ + *op = ARRAY_SIZE(mx51_cpu_op); + return mx51_cpu_op; +} diff --git a/arch/arm/mach-mx5/cpu_op-mx51.h b/arch/arm/mach-mx5/cpu_op-mx51.h new file mode 100644 index 0000000..97477fe --- /dev/null +++ b/arch/arm/mach-mx5/cpu_op-mx51.h @@ -0,0 +1,14 @@ +/* + * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +extern struct cpu_op *mx51_get_cpu_op(int *op); diff --git a/arch/arm/plat-mxc/Makefile b/arch/arm/plat-mxc/Makefile index 06875b4..3726709 100644 --- a/arch/arm/plat-mxc/Makefile +++ b/arch/arm/plat-mxc/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_MXC_USE_EPIT) += epit.o obj-$(CONFIG_ARCH_MXC_AUDMUX_V1) += audmux-v1.o obj-$(CONFIG_ARCH_MXC_AUDMUX_V2) += audmux-v2.o obj-$(CONFIG_MXC_DEBUG_BOARD) += 3ds_debugboard.o +obj-$(CONFIG_CPU_FREQ_IMX) += cpufreq.o ifdef CONFIG_SND_IMX_SOC obj-y += ssi-fiq.o obj-y += ssi-fiq-ksym.o diff --git a/arch/arm/plat-mxc/cpufreq.c b/arch/arm/plat-mxc/cpufreq.c new file mode 100644 index 0000000..039538e --- /dev/null +++ b/arch/arm/plat-mxc/cpufreq.c @@ -0,0 +1,206 @@ +/* + * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +/* + * A driver for the Freescale Semiconductor i.MXC CPUfreq module. + * The CPUFREQ driver is for controling CPU frequency. It allows you to change + * the CPU clock speed on the fly. + */ + +#include <linux/cpufreq.h> +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/slab.h> +#include <mach/hardware.h> +#include <mach/clock.h> + +#define CLK32_FREQ 32768 +#define NANOSECOND (1000 * 1000 * 1000) + +struct cpu_op *(*get_cpu_op)(int *op); + +static int cpu_freq_khz_min; +static int cpu_freq_khz_max; + +static struct clk *cpu_clk; +static struct cpufreq_frequency_table *imx_freq_table; + +static int cpu_op_nr; +static struct cpu_op *cpu_op_tbl; + +static int set_cpu_freq(int freq) +{ + int ret = 0; + int org_cpu_rate; + + org_cpu_rate = clk_get_rate(cpu_clk); + if (org_cpu_rate == freq) + return ret; + + ret = clk_set_rate(cpu_clk, freq); + if (ret != 0) { + printk(KERN_DEBUG "cannot set CPU clock rate\n"); + return ret; + } + + return ret; +} + +static int mxc_verify_speed(struct cpufreq_policy *policy) +{ + if (policy->cpu != 0) + return -EINVAL; + + return cpufreq_frequency_table_verify(policy, imx_freq_table); +} + +static unsigned int mxc_get_speed(unsigned int cpu) +{ + if (cpu) + return 0; + + return clk_get_rate(cpu_clk) / 1000; +} + +static int mxc_set_target(struct cpufreq_policy *policy, + unsigned int target_freq, unsigned int relation) +{ + struct cpufreq_freqs freqs; + int freq_Hz; + int ret = 0; + unsigned int index; + + cpufreq_frequency_table_target(policy, imx_freq_table, + target_freq, relation, &index); + freq_Hz = imx_freq_table[index].frequency * 1000; + + freqs.old = clk_get_rate(cpu_clk) / 1000; + freqs.new = freq_Hz / 1000; + freqs.cpu = 0; + freqs.flags = 0; + cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); + + ret = set_cpu_freq(freq_Hz); + + cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); + + return ret; +} + +static int __init mxc_cpufreq_init(struct cpufreq_policy *policy) +{ + int ret; + int i; + + printk(KERN_INFO "i.MXC CPU frequency driver\n"); + + if (policy->cpu != 0) + return -EINVAL; + + if (!get_cpu_op) + return -EINVAL; + + cpu_clk = clk_get(NULL, "cpu_clk"); + if (IS_ERR(cpu_clk)) { + printk(KERN_ERR "%s: failed to get cpu clock\n", __func__); + return PTR_ERR(cpu_clk); + } + + cpu_op_tbl = get_cpu_op(&cpu_op_nr); + + cpu_freq_khz_min = cpu_op_tbl[0].cpu_rate / 1000; + cpu_freq_khz_max = cpu_op_tbl[0].cpu_rate / 1000; + + imx_freq_table = kmalloc( + sizeof(struct cpufreq_frequency_table) * (cpu_op_nr + 1), + GFP_KERNEL); + if (!imx_freq_table) { + ret = -ENOMEM; + goto err1; + } + + for (i = 0; i < cpu_op_nr; i++) { + imx_freq_table[i].index = i; + imx_freq_table[i].frequency = cpu_op_tbl[i].cpu_rate / 1000; + + if ((cpu_op_tbl[i].cpu_rate / 1000) < cpu_freq_khz_min) + cpu_freq_khz_min = cpu_op_tbl[i].cpu_rate / 1000; + + if ((cpu_op_tbl[i].cpu_rate / 1000) > cpu_freq_khz_max) + cpu_freq_khz_max = cpu_op_tbl[i].cpu_rate / 1000; + } + + imx_freq_table[i].index = i; + imx_freq_table[i].frequency = CPUFREQ_TABLE_END; + + policy->cur = clk_get_rate(cpu_clk) / 1000; + policy->governor = CPUFREQ_DEFAULT_GOVERNOR; + policy->min = policy->cpuinfo.min_freq = cpu_freq_khz_min; + policy->max = policy->cpuinfo.max_freq = cpu_freq_khz_max; + + /* Manual states, that PLL stabilizes in two CLK32 periods */ + policy->cpuinfo.transition_latency = 2 * NANOSECOND / CLK32_FREQ; + + ret = cpufreq_frequency_table_cpuinfo(policy, imx_freq_table); + + if (ret < 0) { + printk(KERN_ERR "%s: failed to register i.MXC CPUfreq \ + with error code %d\n", __func__, ret); + goto err; + } + + cpufreq_frequency_table_get_attr(imx_freq_table, policy->cpu); + return 0; +err: + kfree(imx_freq_table); +err1: + clk_put(cpu_clk); + return ret; +} + +static int mxc_cpufreq_exit(struct cpufreq_policy *policy) +{ + cpufreq_frequency_table_put_attr(policy->cpu); + + set_cpu_freq(cpu_freq_khz_max * 1000); + clk_put(cpu_clk); + kfree(imx_freq_table); + return 0; +} + +static struct cpufreq_driver mxc_driver = { + .flags = CPUFREQ_STICKY, + .verify = mxc_verify_speed, + .target = mxc_set_target, + .get = mxc_get_speed, + .init = mxc_cpufreq_init, + .exit = mxc_cpufreq_exit, + .name = "imx", +}; + +static int __devinit mxc_cpufreq_driver_init(void) +{ + return cpufreq_register_driver(&mxc_driver); +} + +static void mxc_cpufreq_driver_exit(void) +{ + cpufreq_unregister_driver(&mxc_driver); +} + +module_init(mxc_cpufreq_driver_init); +module_exit(mxc_cpufreq_driver_exit); + +MODULE_AUTHOR("Freescale Semiconductor Inc. Yong Shen <yong.shen(a)linaro.org>"); +MODULE_DESCRIPTION("CPUfreq driver for i.MX"); +MODULE_LICENSE("GPL"); diff --git a/arch/arm/plat-mxc/include/mach/mxc.h b/arch/arm/plat-mxc/include/mach/mxc.h index a790bf2..a42c720 100644 --- a/arch/arm/plat-mxc/include/mach/mxc.h +++ b/arch/arm/plat-mxc/include/mach/mxc.h @@ -1,5 +1,5 @@ /* - * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright 2004-2007, 2010 Freescale Semiconductor, Inc. All Rights Reserved. * Copyright (C) 2008 Juergen Beisert (kernel(a)pengutronix.de) * * This program is free software; you can redistribute it and/or @@ -20,6 +20,8 @@ #ifndef __ASM_ARCH_MXC_H__ #define __ASM_ARCH_MXC_H__ +#include <linux/types.h> + #ifndef __ASM_ARCH_MXC_HARDWARE_H__ #error "Do not include directly." #endif @@ -133,6 +135,15 @@ extern unsigned int __mxc_cpu_type; # define cpu_is_mxc91231() (0) #endif +#ifndef __ASSEMBLY__ + +struct cpu_op { + u32 cpu_rate; +}; + +extern struct cpu_op *(*get_cpu_op)(int *op); +#endif + #if defined(CONFIG_ARCH_MX3) || defined(CONFIG_ARCH_MX2) /* These are deprecated, use mx[23][157]_setup_weimcs instead. */ #define CSCR_U(n) (IO_ADDRESS(WEIM_BASE_ADDR + n * 0x10)) -- 1.6.3.3

14 years, 2 months

[PATCH] u-boot mx51evk: add bootcmd_mmc evn as default

by Shawn Guo

This patch is to address mx51evk u-boot issue below. https://bugs.launchpad.net/u-boot-linaro/+bug/655461 With this patch, an auto boot mx51evk Linaro image on mmc becomes possible.

14 years, 2 months

Linaro@UDS schedule available

by Steve Langasek

Hi everyone, The day-by-day schedule for Linaro@UDS is now available for viewing: https://wiki.linaro.org/Events/2010-10-LDS#Session%20Schedule To get the most out of your Linaro@UDS experience you are strongly encouraged to look at the schedule before this event and register your interest in specific sessions, as described here: https://wiki.linaro.org/Events/2010-10-LDS#Before%20the%20event Subscribing to sessions is helpful because you can then use the "Hide talks that aren't for me" button to get a view of where you want to be when. Linaro assignees will have already been subscribed to some sessions by their technical leads where their participation is required, but all attendees should feel welcome to participate in any sessions! * Scheduling conflicts * If there is a session that it's important that you participate in directly that is scheduled before your arrival or after your departure, or if two sessions are scheduled at the same time and you need to be present for both of them, indicate this by marking yourself as "participation essential" for each of these sessions and make sure that your arrival and departure times are correctly recorded in your Linaro@UDS registration: https://edge.launchpad.net/sprints/uds-n/+attend Please don't use this lightly. We have a whole week packed full of interesting topics, and it's impossible for any of us to attend all the sessions that we want to; that's why we have session minutes and wiki specs afterwards, to help people catch up with discussions they couldn't be present for. You should only mark yourself "participation essential" where it would be important for us to reschedule a session around your requirements. And please get any such requests into the system before the end of day on Friday. We are unlikely to be able to accomodate schedule change requests once the conference has started. See you all next week in Florida! -- Steve Langasek Give me a lever long enough and a Free OS Debian Developer to set it on, and I can move the world. Ubuntu Developer http://www.debian.org/ slangasek(a)ubuntu.com vorlon(a)debian.org

14 years, 2 months

linux-linaro pull request

by John Rigby

The following changes since commit ddc7db4d52a56f351b338fd985448e3c88714e5a: LINARO: Linaro-2.6.35-1008.14 (2010-10-20 10:24:37 -0600) are available in the git repository at: git://git.linaro.org/ubuntu/linux-linaro.git linaro-2.6.35-1008.15 John Rigby (2): LINARO: start new release LINARO: Linaro-2.6.35-1008.15 Robert Nelson (1): SRU: Fix DVI for Beagle xM rev A3 arch/arm/mach-omap2/board-omap3beagle.c | 4 + debian.linaro/abi/2.6.35-1007.13/abiname | 1 - debian.linaro/abi/2.6.35-1007.13/armel/ignore | 1 - .../abi/2.6.35-1007.13/armel/ignore.modules | 1 - debian.linaro/abi/2.6.35-1008.14/abiname | 1 + .../armel/linaro-mx51 | 108 ++++++++++---------- .../armel/linaro-mx51.modules | 3 - .../armel/linaro-omap | 109 ++++++++++---------- .../armel/linaro-omap.modules | 2 +- .../armel/linaro-vexpress | 0 .../armel/linaro-vexpress.modules | 0 debian.linaro/changelog | 9 ++ 12 files changed, 123 insertions(+), 116 deletions(-) delete mode 100644 debian.linaro/abi/2.6.35-1007.13/abiname delete mode 100644 debian.linaro/abi/2.6.35-1007.13/armel/ignore delete mode 100644 debian.linaro/abi/2.6.35-1007.13/armel/ignore.modules create mode 100644 debian.linaro/abi/2.6.35-1008.14/abiname rename debian.linaro/abi/{2.6.35-1007.13 => 2.6.35-1008.14}/armel/linaro-mx51 (98%) rename debian.linaro/abi/{2.6.35-1007.13 => 2.6.35-1008.14}/armel/linaro-mx51.modules (98%) rename debian.linaro/abi/{2.6.35-1007.13 => 2.6.35-1008.14}/armel/linaro-omap (99%) rename debian.linaro/abi/{2.6.35-1007.13 => 2.6.35-1008.14}/armel/linaro-omap.modules (99%) rename debian.linaro/abi/{2.6.35-1007.13 => 2.6.35-1008.14}/armel/linaro-vexpress (100%) rename debian.linaro/abi/{2.6.35-1007.13 => 2.6.35-1008.14}/armel/linaro-vexpress.modules (100%)

14 years, 2 months

[PATCH] u-boot mx51evk: read fec mac address from fuse

by Shawn Guo

The patch is to address the following bug. [imx51evk ] no ethN device if ethaddr is not set in u-boot https://bugs.launchpad.net/u-boot-linaro/+bug/652426

14 years, 2 months

Flash cards

by Michael Hope

I'm still terrible with names so I've updated my flash cards for the summit. See: http://people.linaro.org/~michaelh/boo/ Click on the image to show the persons name and role. Click again to move on. The site is iPhone friendly. The site is generated by parsing the engineering contacts page and pulling out the images. See: https://code.launchpad.net/~michaelh1/+junk/boo for the terrible, terrible code. -- Michael

14 years, 2 months

Linaro Infrastructure Team Weekly Report (2010-10-14 to 2010-10-20)

by Ian Smith

All, The weekly report for the Linaro Infrastructure team may be found at:- Status report: https://wiki.linaro.org/Platform/Infrastructure/Status/2010-10-21 Burndown chart:http://people.canonical.com/~pitti/workitems/maverick/linaro-infrastr… The Infrastructure related blueprints, of which currently there are 4 active ones, are showing that there are 11 work items in progress (14 last week), and 12 work items to undertake (12 last week). arm-m-validation-dashboard; 2 work items completed since last week; 2 in progress; 8 to do arm-m-image-building-console; 1 work items completed since last week; 7 in progress; 3 to do arm-m-automated-testing-framework; no change in status from last week; 1 in progress; 0 to do arm-m-testsuites-and-profilers; no change in status from last week; 1 in progress; 1 to do In arm-m-image-building-console, 6 items are awaiting review before they can be completed. Preparations for UDS are occupying more of the team's time, with more tasks related to UDS being undertaken and completed that are not in blueprints. Specifics accomplished this week include:- * Three bugs fixed in abrek (Automated Test Framework) - two related to gtkperf, and one related to an IOException generated when quitting while piping the output. * Two branches were merged back to the launch-control trunk * OpenID (secure authentication) reviewed and landed for arm-m-validation-dashboard Please let me know if you have any comments or questions. Kind Regards, Ian

14 years, 2 months

[[PATCHv4]] cpufreq for freescale mx51

by yong.shen＠linaro.org

From: Yong Shen <yong.shen(a)linaro.org> Currently, only two operating points: 160Mhz and 800Mhz. the operating points are tested on babbage 3.0 Signed-off-by: Yong Shen <yong.shen(a)linaro.org> --- arch/arm/Kconfig | 6 + arch/arm/mach-mx5/Kconfig | 1 + arch/arm/mach-mx5/Makefile | 1 + arch/arm/mach-mx5/board-mx51_babbage.c | 6 +- arch/arm/mach-mx5/clock-mx51.c | 22 +++- arch/arm/mach-mx5/cpu_op-mx51.c | 29 +++++ arch/arm/mach-mx5/cpu_op-mx51.h | 14 ++ arch/arm/plat-mxc/Makefile | 1 + arch/arm/plat-mxc/cpufreq.c | 206 ++++++++++++++++++++++++++++++++ arch/arm/plat-mxc/include/mach/mxc.h | 11 ++- 10 files changed, 293 insertions(+), 4 deletions(-) create mode 100644 arch/arm/mach-mx5/cpu_op-mx51.c create mode 100644 arch/arm/mach-mx5/cpu_op-mx51.h create mode 100644 arch/arm/plat-mxc/cpufreq.c diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index e4ea9cb..d9ad605 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1692,6 +1692,12 @@ if ARCH_HAS_CPUFREQ source "drivers/cpufreq/Kconfig" +config CPU_FREQ_IMX + tristate "CPUfreq driver for i.MX CPUs" + depends on ARCH_MXC && CPU_FREQ + help + This enables the CPUfreq driver for i.MX CPUs. + config CPU_FREQ_SA1100 bool diff --git a/arch/arm/mach-mx5/Kconfig b/arch/arm/mach-mx5/Kconfig index 0848db5..7a621b4 100644 --- a/arch/arm/mach-mx5/Kconfig +++ b/arch/arm/mach-mx5/Kconfig @@ -5,6 +5,7 @@ config ARCH_MX51 default y select MXC_TZIC select ARCH_MXC_IOMUX_V3 + select ARCH_HAS_CPUFREQ comment "MX5 platforms:" diff --git a/arch/arm/mach-mx5/Makefile b/arch/arm/mach-mx5/Makefile index 86c66e7..2fadac5 100644 --- a/arch/arm/mach-mx5/Makefile +++ b/arch/arm/mach-mx5/Makefile @@ -5,6 +5,7 @@ # Object file lists. obj-y := cpu.o mm.o clock-mx51.o devices.o +obj-$(CONFIG_CPU_FREQ_IMX) += cpu_op-mx51.o obj-$(CONFIG_MACH_MX51_BABBAGE) += board-mx51_babbage.o obj-$(CONFIG_MACH_MX51_3DS) += board-mx51_3ds.o obj-$(CONFIG_MACH_EUKREA_CPUIMX51) += board-cpuimx51.o diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c index 6e384d9..bdd625c 100644 --- a/arch/arm/mach-mx5/board-mx51_babbage.c +++ b/arch/arm/mach-mx5/board-mx51_babbage.c @@ -1,5 +1,5 @@ /* - * Copyright 2009 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved. * Copyright (C) 2009-2010 Amit Kucheria <amit.kucheria(a)canonical.com> * * The code contained herein is licensed under the GNU General Public @@ -32,6 +32,7 @@ #include <asm/mach/time.h> #include "devices.h" +#include "cpu_op-mx51.h" #define BABBAGE_USB_HUB_RESET (0*32 + 7) /* GPIO_1_7 */ #define BABBAGE_USBH1_STP (0*32 + 27) /* GPIO_1_27 */ @@ -247,6 +248,9 @@ static void __init mxc_board_init(void) { struct pad_desc usbh1stp = MX51_PAD_USBH1_STP__USBH1_STP; +#if defined(CONFIG_CPU_FREQ_IMX) + get_cpu_op = mx51_get_cpu_op; +#endif mxc_iomux_v3_setup_multiple_pads(mx51babbage_pads, ARRAY_SIZE(mx51babbage_pads)); mxc_init_imx_uart(); diff --git a/arch/arm/mach-mx5/clock-mx51.c b/arch/arm/mach-mx5/clock-mx51.c index 6af69de..f89d8a0 100644 --- a/arch/arm/mach-mx5/clock-mx51.c +++ b/arch/arm/mach-mx5/clock-mx51.c @@ -330,7 +330,7 @@ static int _clk_lp_apm_set_parent(struct clk *clk, struct clk *parent) return 0; } -static unsigned long clk_arm_get_rate(struct clk *clk) +static unsigned long clk_cpu_get_rate(struct clk *clk) { u32 cacrr, div; unsigned long parent_rate; @@ -342,6 +342,22 @@ static unsigned long clk_arm_get_rate(struct clk *clk) return parent_rate / div; } +static int clk_cpu_set_rate(struct clk *clk, unsigned long rate) +{ + u32 reg, cpu_podf; + unsigned long parent_rate; + + parent_rate = clk_get_rate(clk->parent); + cpu_podf = parent_rate / rate - 1; + /* use post divider to change freq */ + reg = __raw_readl(MXC_CCM_CACRR); + reg &= ~MXC_CCM_CACRR_ARM_PODF_MASK; + reg |= cpu_podf << MXC_CCM_CACRR_ARM_PODF_OFFSET; + __raw_writel(reg, MXC_CCM_CACRR); + + return 0; +} + static int _clk_periph_apm_set_parent(struct clk *clk, struct clk *parent) { u32 reg, mux; @@ -693,7 +709,8 @@ static struct clk periph_apm_clk = { static struct clk cpu_clk = { .parent = &pll1_sw_clk, - .get_rate = clk_arm_get_rate, + .get_rate = clk_cpu_get_rate, + .set_rate = clk_cpu_set_rate, }; static struct clk ahb_clk = { @@ -837,6 +854,7 @@ static struct clk_lookup lookups[] = { _REGISTER_CLOCK("fsl-usb2-udc", "usb", usboh3_clk) _REGISTER_CLOCK("fsl-usb2-udc", "usb_ahb", ahb_clk) _REGISTER_CLOCK("imx-keypad.0", NULL, kpp_clk) + _REGISTER_CLOCK(NULL, "cpu_clk", cpu_clk) }; static void clk_tree_init(void) diff --git a/arch/arm/mach-mx5/cpu_op-mx51.c b/arch/arm/mach-mx5/cpu_op-mx51.c new file mode 100644 index 0000000..9d34c3d --- /dev/null +++ b/arch/arm/mach-mx5/cpu_op-mx51.c @@ -0,0 +1,29 @@ +/* + * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include <linux/types.h> +#include <mach/hardware.h> +#include <linux/kernel.h> + +static struct cpu_op mx51_cpu_op[] = { + { + .cpu_rate = 160000000,}, + { + .cpu_rate = 800000000,}, +}; + +struct cpu_op *mx51_get_cpu_op(int *op) +{ + *op = ARRAY_SIZE(mx51_cpu_op); + return mx51_cpu_op; +} diff --git a/arch/arm/mach-mx5/cpu_op-mx51.h b/arch/arm/mach-mx5/cpu_op-mx51.h new file mode 100644 index 0000000..97477fe --- /dev/null +++ b/arch/arm/mach-mx5/cpu_op-mx51.h @@ -0,0 +1,14 @@ +/* + * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +extern struct cpu_op *mx51_get_cpu_op(int *op); diff --git a/arch/arm/plat-mxc/Makefile b/arch/arm/plat-mxc/Makefile index 78d405e..a833d38 100644 --- a/arch/arm/plat-mxc/Makefile +++ b/arch/arm/plat-mxc/Makefile @@ -16,6 +16,7 @@ obj-$(CONFIG_MXC_ULPI) += ulpi.o obj-$(CONFIG_ARCH_MXC_AUDMUX_V1) += audmux-v1.o obj-$(CONFIG_ARCH_MXC_AUDMUX_V2) += audmux-v2.o obj-$(CONFIG_MXC_DEBUG_BOARD) += 3ds_debugboard.o +obj-$(CONFIG_CPU_FREQ_IMX) += cpufreq.o ifdef CONFIG_SND_IMX_SOC obj-y += ssi-fiq.o obj-y += ssi-fiq-ksym.o diff --git a/arch/arm/plat-mxc/cpufreq.c b/arch/arm/plat-mxc/cpufreq.c new file mode 100644 index 0000000..039538e --- /dev/null +++ b/arch/arm/plat-mxc/cpufreq.c @@ -0,0 +1,206 @@ +/* + * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +/* + * A driver for the Freescale Semiconductor i.MXC CPUfreq module. + * The CPUFREQ driver is for controling CPU frequency. It allows you to change + * the CPU clock speed on the fly. + */ + +#include <linux/cpufreq.h> +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/slab.h> +#include <mach/hardware.h> +#include <mach/clock.h> + +#define CLK32_FREQ 32768 +#define NANOSECOND (1000 * 1000 * 1000) + +struct cpu_op *(*get_cpu_op)(int *op); + +static int cpu_freq_khz_min; +static int cpu_freq_khz_max; + +static struct clk *cpu_clk; +static struct cpufreq_frequency_table *imx_freq_table; + +static int cpu_op_nr; +static struct cpu_op *cpu_op_tbl; + +static int set_cpu_freq(int freq) +{ + int ret = 0; + int org_cpu_rate; + + org_cpu_rate = clk_get_rate(cpu_clk); + if (org_cpu_rate == freq) + return ret; + + ret = clk_set_rate(cpu_clk, freq); + if (ret != 0) { + printk(KERN_DEBUG "cannot set CPU clock rate\n"); + return ret; + } + + return ret; +} + +static int mxc_verify_speed(struct cpufreq_policy *policy) +{ + if (policy->cpu != 0) + return -EINVAL; + + return cpufreq_frequency_table_verify(policy, imx_freq_table); +} + +static unsigned int mxc_get_speed(unsigned int cpu) +{ + if (cpu) + return 0; + + return clk_get_rate(cpu_clk) / 1000; +} + +static int mxc_set_target(struct cpufreq_policy *policy, + unsigned int target_freq, unsigned int relation) +{ + struct cpufreq_freqs freqs; + int freq_Hz; + int ret = 0; + unsigned int index; + + cpufreq_frequency_table_target(policy, imx_freq_table, + target_freq, relation, &index); + freq_Hz = imx_freq_table[index].frequency * 1000; + + freqs.old = clk_get_rate(cpu_clk) / 1000; + freqs.new = freq_Hz / 1000; + freqs.cpu = 0; + freqs.flags = 0; + cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); + + ret = set_cpu_freq(freq_Hz); + + cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); + + return ret; +} + +static int __init mxc_cpufreq_init(struct cpufreq_policy *policy) +{ + int ret; + int i; + + printk(KERN_INFO "i.MXC CPU frequency driver\n"); + + if (policy->cpu != 0) + return -EINVAL; + + if (!get_cpu_op) + return -EINVAL; + + cpu_clk = clk_get(NULL, "cpu_clk"); + if (IS_ERR(cpu_clk)) { + printk(KERN_ERR "%s: failed to get cpu clock\n", __func__); + return PTR_ERR(cpu_clk); + } + + cpu_op_tbl = get_cpu_op(&cpu_op_nr); + + cpu_freq_khz_min = cpu_op_tbl[0].cpu_rate / 1000; + cpu_freq_khz_max = cpu_op_tbl[0].cpu_rate / 1000; + + imx_freq_table = kmalloc( + sizeof(struct cpufreq_frequency_table) * (cpu_op_nr + 1), + GFP_KERNEL); + if (!imx_freq_table) { + ret = -ENOMEM; + goto err1; + } + + for (i = 0; i < cpu_op_nr; i++) { + imx_freq_table[i].index = i; + imx_freq_table[i].frequency = cpu_op_tbl[i].cpu_rate / 1000; + + if ((cpu_op_tbl[i].cpu_rate / 1000) < cpu_freq_khz_min) + cpu_freq_khz_min = cpu_op_tbl[i].cpu_rate / 1000; + + if ((cpu_op_tbl[i].cpu_rate / 1000) > cpu_freq_khz_max) + cpu_freq_khz_max = cpu_op_tbl[i].cpu_rate / 1000; + } + + imx_freq_table[i].index = i; + imx_freq_table[i].frequency = CPUFREQ_TABLE_END; + + policy->cur = clk_get_rate(cpu_clk) / 1000; + policy->governor = CPUFREQ_DEFAULT_GOVERNOR; + policy->min = policy->cpuinfo.min_freq = cpu_freq_khz_min; + policy->max = policy->cpuinfo.max_freq = cpu_freq_khz_max; + + /* Manual states, that PLL stabilizes in two CLK32 periods */ + policy->cpuinfo.transition_latency = 2 * NANOSECOND / CLK32_FREQ; + + ret = cpufreq_frequency_table_cpuinfo(policy, imx_freq_table); + + if (ret < 0) { + printk(KERN_ERR "%s: failed to register i.MXC CPUfreq \ + with error code %d\n", __func__, ret); + goto err; + } + + cpufreq_frequency_table_get_attr(imx_freq_table, policy->cpu); + return 0; +err: + kfree(imx_freq_table); +err1: + clk_put(cpu_clk); + return ret; +} + +static int mxc_cpufreq_exit(struct cpufreq_policy *policy) +{ + cpufreq_frequency_table_put_attr(policy->cpu); + + set_cpu_freq(cpu_freq_khz_max * 1000); + clk_put(cpu_clk); + kfree(imx_freq_table); + return 0; +} + +static struct cpufreq_driver mxc_driver = { + .flags = CPUFREQ_STICKY, + .verify = mxc_verify_speed, + .target = mxc_set_target, + .get = mxc_get_speed, + .init = mxc_cpufreq_init, + .exit = mxc_cpufreq_exit, + .name = "imx", +}; + +static int __devinit mxc_cpufreq_driver_init(void) +{ + return cpufreq_register_driver(&mxc_driver); +} + +static void mxc_cpufreq_driver_exit(void) +{ + cpufreq_unregister_driver(&mxc_driver); +} + +module_init(mxc_cpufreq_driver_init); +module_exit(mxc_cpufreq_driver_exit); + +MODULE_AUTHOR("Freescale Semiconductor Inc. Yong Shen <yong.shen(a)linaro.org>"); +MODULE_DESCRIPTION("CPUfreq driver for i.MX"); +MODULE_LICENSE("GPL"); diff --git a/arch/arm/plat-mxc/include/mach/mxc.h b/arch/arm/plat-mxc/include/mach/mxc.h index a790bf2..084a856 100644 --- a/arch/arm/plat-mxc/include/mach/mxc.h +++ b/arch/arm/plat-mxc/include/mach/mxc.h @@ -1,5 +1,5 @@ /* - * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright 2004-2007, 2010 Freescale Semiconductor, Inc. All Rights Reserved. * Copyright (C) 2008 Juergen Beisert (kernel(a)pengutronix.de) * * This program is free software; you can redistribute it and/or @@ -133,6 +133,15 @@ extern unsigned int __mxc_cpu_type; # define cpu_is_mxc91231() (0) #endif +#ifndef __ASSEMBLY__ + +struct cpu_op { + u32 cpu_rate; +}; + +extern struct cpu_op *(*get_cpu_op)(int *op); +#endif + #if defined(CONFIG_ARCH_MX3) || defined(CONFIG_ARCH_MX2) /* These are deprecated, use mx[23][157]_setup_weimcs instead. */ #define CSCR_U(n) (IO_ADDRESS(WEIM_BASE_ADDR + n * 0x10)) -- 1.6.3.3

14 years, 2 months

Weekly Linaro image testing - part 4

by Jamie Bennett

Hi, We are nearly there ! Today marks the fourth installment of the weekly testing saga, the last before Linaro@UDS happens. The -proposed queue will be frozen on the 27th October to flush out any outstanding changes before the release candidate image is produced on November 1st. As always, If you have supported hardware and are willing to test the images, please make your way to: http://wiki.linaro.org/Releases/DailyBuilds for an explanation on how to test and submit your results to the QA tracker at: http://qatracker.linaro.org Happy Testing ! Regards Jamie. -- Linaro Release Manager

14 years, 2 months

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linaro-dev October 2010