FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2024-12-26 19:36:41 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

ARM: tegra: moving the CPU power timer function to PMC driver

Browse Source 
The CPU power timer set up function was related to PMC register. Now moving
it to PMC driver. And it also help to clean up the PM related code later.

The timer was calculated based on the input clock of PMC. In this patch, we
also get the clock from DT.

Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Joseph Lo 2013-04-03 19:31:28 +08:00 committed by Stephen Warren
parent 7021d12205
commit 0337c3e0c3
4 changed files with 41 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/mach-tegra/common.c
View File

@ -61,6 +61,7 @@ u32 tegra_uart_config[4] = {
void __init tegra_dt_init_irq(void)
{
tegra_clocks_init();
tegra_pmc_init();
tegra_init_irq();
irqchip_init();
}
@ -100,7 +101,6 @@ void __init tegra_init_early(void)
tegra_apb_io_init();
tegra_init_fuse();
tegra_init_cache();
tegra_pmc_init();
tegra_powergate_init();
tegra_hotplug_init();
}

37
arch/arm/mach-tegra/pm.c
View File

@ -22,7 +22,6 @@
#include <linux/cpumask.h>
#include <linux/delay.h>
#include <linux/cpu_pm.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/clk/tegra.h>
@ -37,52 +36,18 @@
#include "reset.h"
#include "flowctrl.h"
#include "fuse.h"
#include "pmc.h"
#include "sleep.h"
#define TEGRA_POWER_CPU_PWRREQ_OE (1 << 16) /* CPU pwr req enable */
#define PMC_CTRL 0x0
#define PMC_CPUPWRGOOD_TIMER 0xc8
#define PMC_CPUPWROFF_TIMER 0xcc
#ifdef CONFIG_PM_SLEEP
static DEFINE_SPINLOCK(tegra_lp2_lock);
static void __iomem *pmc = IO_ADDRESS(TEGRA_PMC_BASE);
static struct clk *tegra_pclk;
void (*tegra_tear_down_cpu)(void);
static void set_power_timers(unsigned long us_on, unsigned long us_off)
{
unsigned long long ticks;
unsigned long long pclk;
unsigned long rate;
static unsigned long tegra_last_pclk;
if (tegra_pclk == NULL) {
tegra_pclk = clk_get_sys(NULL, "pclk");
WARN_ON(IS_ERR(tegra_pclk));
}
rate = clk_get_rate(tegra_pclk);
if (WARN_ON_ONCE(rate <= 0))
pclk = 100000000;
else
pclk = rate;
if ((rate != tegra_last_pclk)) {
ticks = (us_on * pclk) + 999999ull;
do_div(ticks, 1000000);
writel((unsigned long)ticks, pmc + PMC_CPUPWRGOOD_TIMER);
ticks = (us_off * pclk) + 999999ull;
do_div(ticks, 1000000);
writel((unsigned long)ticks, pmc + PMC_CPUPWROFF_TIMER);
wmb();
}
tegra_last_pclk = pclk;
}
/*
* restore_cpu_complex
*

35
arch/arm/mach-tegra/pmc.c
View File

@ -16,6 +16,7 @@
*/
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
@ -27,6 +28,9 @@
#define PMC_REMOVE_CLAMPING 0x34
#define PMC_PWRGATE_STATUS 0x38
#define PMC_CPUPWRGOOD_TIMER 0xc8
#define PMC_CPUPWROFF_TIMER 0xcc
#define TEGRA_POWERGATE_PCIE 3
#define TEGRA_POWERGATE_VDEC 4
#define TEGRA_POWERGATE_CPU1 9
@ -43,6 +47,7 @@ static DEFINE_SPINLOCK(tegra_powergate_lock);
static void __iomem *tegra_pmc_base;
static bool tegra_pmc_invert_interrupt;
static struct clk *tegra_pclk;
static inline u32 tegra_pmc_readl(u32 reg)
{
@ -133,6 +138,34 @@ int tegra_pmc_cpu_remove_clamping(int cpuid)
return tegra_pmc_powergate_remove_clamping(id);
}
#ifdef CONFIG_PM_SLEEP
void set_power_timers(unsigned long us_on, unsigned long us_off)
{
unsigned long long ticks;
unsigned long long pclk;
unsigned long rate;
static unsigned long tegra_last_pclk;
rate = clk_get_rate(tegra_pclk);
if (WARN_ON_ONCE(rate <= 0))
pclk = 100000000;
else
pclk = rate;
if ((rate != tegra_last_pclk)) {
ticks = (us_on * pclk) + 999999ull;
do_div(ticks, 1000000);
tegra_pmc_writel((unsigned long)ticks, PMC_CPUPWRGOOD_TIMER);
ticks = (us_off * pclk) + 999999ull;
do_div(ticks, 1000000);
tegra_pmc_writel((unsigned long)ticks, PMC_CPUPWROFF_TIMER);
wmb();
}
tegra_last_pclk = pclk;
}
#endif
static const struct of_device_id matches[] __initconst = {
{ .compatible = "nvidia,tegra114-pmc" },
{ .compatible = "nvidia,tegra30-pmc" },
@ -151,6 +184,8 @@ static void tegra_pmc_parse_dt(void)
tegra_pmc_invert_interrupt = of_property_read_bool(np,
"nvidia,invert-interrupt");
tegra_pclk = of_clk_get_by_name(np, "pclk");
WARN_ON(IS_ERR(tegra_pclk));
}
void __init tegra_pmc_init(void)

4
arch/arm/mach-tegra/pmc.h
View File

@ -18,6 +18,10 @@
#ifndef __MACH_TEGRA_PMC_H
#define __MACH_TEGRA_PMC_H
#ifdef CONFIG_PM_SLEEP
void set_power_timers(unsigned long us_on, unsigned long us_off);
#endif
bool tegra_pmc_cpu_is_powered(int cpuid);
int tegra_pmc_cpu_power_on(int cpuid);
int tegra_pmc_cpu_remove_clamping(int cpuid);