mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 05:04:00 +08:00
a7726350e0
Here is a collection of cleanup patches. Among the pieces that stand out are: - The deletion of h720x platforms - Split of at91 non-dt platforms to their own Kconfig file to keep them separate - General cleanups and refactoring of i.MX and MXS platforms - Some restructuring of clock tables for OMAP - Convertion of PMC driver for Tegra to dt-only - Some renames of sunxi -> sun4i (Allwinner A10) - ... plus a bunch of other stuff that I haven't mentioned -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABAgAGBQJRggUqAAoJEIwa5zzehBx3HjEQAJwp7heRs/HwTDzmzcyHkRMV usbaa9dHBuAZ0DzsWjLK99xEn8VWD9TvbeP6hN5gNhxko06UVza3o8PI2iV1ztMB 9K3u2+LS5on/5cOxnsU1va16h5hBZ0ZIgNx5NY+PZ5mBY6v1U3qTjljPP62iXp63 w+sdXeZDe/c5JvuoDRbY0OBR++3Jp8cQg7KbU78jWz3r5D2rC1zwhkf2audcRY6b jIWTj9M8CHynh/D6OzKqDcOYorBHNSRj0YbiWS2nnMfm+0V8nya00EPRpCPRiBUb sobSy1CI9Qxiih3bOf6QCfzCRzJ5hbtE0zlI8g3bqtEZ1yOsE949HrKapWHJJdIU JNTXrxXORAnaRhbzvSPNpp/iJBSDQRsfEETgv5BuHg/4lzTQfzElySbcgb4EeoHr 7Zt8ZR2/Du+u76qIPqs19ES3Wx+nOEOfSDAgZmlfPvlwmlGDYvqAXoeJ006VXnhG JacLuD/cFnJ1w00Bcl48ZXMIsVkoRqjvsCG5q688HGXMM1lU8DfgUpQY6OCWAbdu kFnBinJZk+HbE8FGS8O0BoQ+oiC0YIr2XhATL66PGHq7bLHb5ycwvZ7mrfC0AN9j M9hqTFednwfo9wF8vSj5nMsxXwP8/mky4ECGoFvLsMYDosunrNVnAHtTgDSE+ZgO 6kQJ1P8jBBXn2LyjF88W =xCAx -----END PGP SIGNATURE----- Merge tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC cleanup from Olof Johansson: "Here is a collection of cleanup patches. Among the pieces that stand out are: - The deletion of h720x platforms - Split of at91 non-dt platforms to their own Kconfig file to keep them separate - General cleanups and refactoring of i.MX and MXS platforms - Some restructuring of clock tables for OMAP - Convertion of PMC driver for Tegra to dt-only - Some renames of sunxi -> sun4i (Allwinner A10) - ... plus a bunch of other stuff that I haven't mentioned" * tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (119 commits) ARM: i.MX: remove unused ARCH_* configs ARM i.MX53: remove platform ahci support ARM: sunxi: Rework the restart code irqchip: sunxi: Rename sunxi to sun4i irqchip: sunxi: Make use of the IRQCHIP_DECLARE macro clocksource: sunxi: Rename sunxi to sun4i clocksource: sunxi: make use of CLKSRC_OF clocksource: sunxi: Cleanup the timer code ARM: at91: remove trailing semicolon from macros ARM: at91/setup: fix trivial typos ARM: EXYNOS: remove "config EXYNOS_DEV_DRM" ARM: EXYNOS: change the name of USB ohci header ARM: SAMSUNG: Remove unnecessary code for dma ARM: S3C24XX: Remove unused GPIO drive strength register definitions ARM: OMAP4+: PM: Restore CPU power state to ON with clockdomain force wakeup method ARM: S3C24XX: Removed unneeded dependency on CPU_S3C2412 ARM: S3C24XX: Removed unneeded dependency on CPU_S3C2410 ARM: S3C24XX: Removed unneeded dependency on ARCH_S3C24XX for boards ARM: SAMSUNG: Fix typo "CONFIG_SAMSUNG_DEV_RTC" ARM: S5P64X0: Fix typo "CONFIG_S5P64X0_SETUP_SDHCI" ...
214 lines
5.9 KiB
C
214 lines
5.9 KiB
C
/*
|
|
* OMAP4 Power Management Routines
|
|
*
|
|
* Copyright (C) 2010-2011 Texas Instruments, Inc.
|
|
* Rajendra Nayak <rnayak@ti.com>
|
|
* Santosh Shilimkar <santosh.shilimkar@ti.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/pm.h>
|
|
#include <linux/suspend.h>
|
|
#include <linux/module.h>
|
|
#include <linux/list.h>
|
|
#include <linux/err.h>
|
|
#include <linux/slab.h>
|
|
#include <asm/system_misc.h>
|
|
|
|
#include "soc.h"
|
|
#include "common.h"
|
|
#include "clockdomain.h"
|
|
#include "powerdomain.h"
|
|
#include "pm.h"
|
|
|
|
struct power_state {
|
|
struct powerdomain *pwrdm;
|
|
u32 next_state;
|
|
#ifdef CONFIG_SUSPEND
|
|
u32 saved_state;
|
|
u32 saved_logic_state;
|
|
#endif
|
|
struct list_head node;
|
|
};
|
|
|
|
static LIST_HEAD(pwrst_list);
|
|
|
|
#ifdef CONFIG_SUSPEND
|
|
static int omap4_pm_suspend(void)
|
|
{
|
|
struct power_state *pwrst;
|
|
int state, ret = 0;
|
|
u32 cpu_id = smp_processor_id();
|
|
|
|
/* Save current powerdomain state */
|
|
list_for_each_entry(pwrst, &pwrst_list, node) {
|
|
pwrst->saved_state = pwrdm_read_next_pwrst(pwrst->pwrdm);
|
|
pwrst->saved_logic_state = pwrdm_read_logic_retst(pwrst->pwrdm);
|
|
}
|
|
|
|
/* Set targeted power domain states by suspend */
|
|
list_for_each_entry(pwrst, &pwrst_list, node) {
|
|
omap_set_pwrdm_state(pwrst->pwrdm, pwrst->next_state);
|
|
pwrdm_set_logic_retst(pwrst->pwrdm, PWRDM_POWER_OFF);
|
|
}
|
|
|
|
/*
|
|
* For MPUSS to hit power domain retention(CSWR or OSWR),
|
|
* CPU0 and CPU1 power domains need to be in OFF or DORMANT state,
|
|
* since CPU power domain CSWR is not supported by hardware
|
|
* Only master CPU follows suspend path. All other CPUs follow
|
|
* CPU hotplug path in system wide suspend. On OMAP4, CPU power
|
|
* domain CSWR is not supported by hardware.
|
|
* More details can be found in OMAP4430 TRM section 4.3.4.2.
|
|
*/
|
|
omap4_enter_lowpower(cpu_id, PWRDM_POWER_OFF);
|
|
|
|
/* Restore next powerdomain state */
|
|
list_for_each_entry(pwrst, &pwrst_list, node) {
|
|
state = pwrdm_read_prev_pwrst(pwrst->pwrdm);
|
|
if (state > pwrst->next_state) {
|
|
pr_info("Powerdomain (%s) didn't enter target state %d\n",
|
|
pwrst->pwrdm->name, pwrst->next_state);
|
|
ret = -1;
|
|
}
|
|
omap_set_pwrdm_state(pwrst->pwrdm, pwrst->saved_state);
|
|
pwrdm_set_logic_retst(pwrst->pwrdm, pwrst->saved_logic_state);
|
|
}
|
|
if (ret) {
|
|
pr_crit("Could not enter target state in pm_suspend\n");
|
|
/*
|
|
* OMAP4 chip PM currently works only with certain (newer)
|
|
* versions of bootloaders. This is due to missing code in the
|
|
* kernel to properly reset and initialize some devices.
|
|
* Warn the user about the bootloader version being one of the
|
|
* possible causes.
|
|
* http://www.spinics.net/lists/arm-kernel/msg218641.html
|
|
*/
|
|
pr_warn("A possible cause could be an old bootloader - try u-boot >= v2012.07\n");
|
|
} else {
|
|
pr_info("Successfully put all powerdomains to target state\n");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_SUSPEND */
|
|
|
|
static int __init pwrdms_setup(struct powerdomain *pwrdm, void *unused)
|
|
{
|
|
struct power_state *pwrst;
|
|
|
|
if (!pwrdm->pwrsts)
|
|
return 0;
|
|
|
|
/*
|
|
* Skip CPU0 and CPU1 power domains. CPU1 is programmed
|
|
* through hotplug path and CPU0 explicitly programmed
|
|
* further down in the code path
|
|
*/
|
|
if (!strncmp(pwrdm->name, "cpu", 3))
|
|
return 0;
|
|
|
|
pwrst = kmalloc(sizeof(struct power_state), GFP_ATOMIC);
|
|
if (!pwrst)
|
|
return -ENOMEM;
|
|
|
|
pwrst->pwrdm = pwrdm;
|
|
pwrst->next_state = PWRDM_POWER_RET;
|
|
list_add(&pwrst->node, &pwrst_list);
|
|
|
|
return omap_set_pwrdm_state(pwrst->pwrdm, pwrst->next_state);
|
|
}
|
|
|
|
/**
|
|
* omap_default_idle - OMAP4 default ilde routine.'
|
|
*
|
|
* Implements OMAP4 memory, IO ordering requirements which can't be addressed
|
|
* with default cpu_do_idle() hook. Used by all CPUs with !CONFIG_CPU_IDLE and
|
|
* by secondary CPU with CONFIG_CPU_IDLE.
|
|
*/
|
|
static void omap_default_idle(void)
|
|
{
|
|
omap_do_wfi();
|
|
}
|
|
|
|
/**
|
|
* omap4_pm_init - Init routine for OMAP4 PM
|
|
*
|
|
* Initializes all powerdomain and clockdomain target states
|
|
* and all PRCM settings.
|
|
*/
|
|
int __init omap4_pm_init(void)
|
|
{
|
|
int ret;
|
|
struct clockdomain *emif_clkdm, *mpuss_clkdm, *l3_1_clkdm;
|
|
struct clockdomain *ducati_clkdm, *l3_2_clkdm;
|
|
|
|
if (omap_rev() == OMAP4430_REV_ES1_0) {
|
|
WARN(1, "Power Management not supported on OMAP4430 ES1.0\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
pr_err("Power Management for TI OMAP4.\n");
|
|
/*
|
|
* OMAP4 chip PM currently works only with certain (newer)
|
|
* versions of bootloaders. This is due to missing code in the
|
|
* kernel to properly reset and initialize some devices.
|
|
* http://www.spinics.net/lists/arm-kernel/msg218641.html
|
|
*/
|
|
pr_warn("OMAP4 PM: u-boot >= v2012.07 is required for full PM support\n");
|
|
|
|
ret = pwrdm_for_each(pwrdms_setup, NULL);
|
|
if (ret) {
|
|
pr_err("Failed to setup powerdomains\n");
|
|
goto err2;
|
|
}
|
|
|
|
/*
|
|
* The dynamic dependency between MPUSS -> MEMIF and
|
|
* MPUSS -> L4_PER/L3_* and DUCATI -> L3_* doesn't work as
|
|
* expected. The hardware recommendation is to enable static
|
|
* dependencies for these to avoid system lock ups or random crashes.
|
|
*/
|
|
mpuss_clkdm = clkdm_lookup("mpuss_clkdm");
|
|
emif_clkdm = clkdm_lookup("l3_emif_clkdm");
|
|
l3_1_clkdm = clkdm_lookup("l3_1_clkdm");
|
|
l3_2_clkdm = clkdm_lookup("l3_2_clkdm");
|
|
ducati_clkdm = clkdm_lookup("ducati_clkdm");
|
|
if ((!mpuss_clkdm) || (!emif_clkdm) || (!l3_1_clkdm) ||
|
|
(!l3_2_clkdm) || (!ducati_clkdm))
|
|
goto err2;
|
|
|
|
ret = clkdm_add_wkdep(mpuss_clkdm, emif_clkdm);
|
|
ret |= clkdm_add_wkdep(mpuss_clkdm, l3_1_clkdm);
|
|
ret |= clkdm_add_wkdep(mpuss_clkdm, l3_2_clkdm);
|
|
ret |= clkdm_add_wkdep(ducati_clkdm, l3_1_clkdm);
|
|
ret |= clkdm_add_wkdep(ducati_clkdm, l3_2_clkdm);
|
|
if (ret) {
|
|
pr_err("Failed to add MPUSS -> L3/EMIF/L4PER, DUCATI -> L3 wakeup dependency\n");
|
|
goto err2;
|
|
}
|
|
|
|
ret = omap4_mpuss_init();
|
|
if (ret) {
|
|
pr_err("Failed to initialise OMAP4 MPUSS\n");
|
|
goto err2;
|
|
}
|
|
|
|
(void) clkdm_for_each(omap_pm_clkdms_setup, NULL);
|
|
|
|
#ifdef CONFIG_SUSPEND
|
|
omap_pm_suspend = omap4_pm_suspend;
|
|
#endif
|
|
|
|
/* Overwrite the default cpu_do_idle() */
|
|
arm_pm_idle = omap_default_idle;
|
|
|
|
omap4_idle_init();
|
|
|
|
err2:
|
|
return ret;
|
|
}
|