Messages in this thread | | | Date | Fri, 18 Mar 2011 15:25:02 +0000 | From | Russell King - ARM Linux <> | Subject | Re: [PATCHv4 3/3] ARM: mx51: Add support for low power suspend on MX51 |
| |
On Fri, Mar 18, 2011 at 10:21:24AM -0500, Dinh.Nguyen@freescale.com wrote: > +#include <linux/suspend.h> > +#include <linux/clk.h> > +#include <asm/mach/map.h> > +#include <asm/cacheflush.h> > +#include <asm/tlb.h> > +#include <mach/system.h> > +#include "crm_regs.h"
Why does the code below require asm/mach/map.h ? Why does it require asm/tlb.h ?
> + > +static struct clk *gpc_dvfs_clk; > + > +static int mx5_suspend_enter(suspend_state_t state) > +{ > + if (gpc_dvfs_clk == NULL) > + gpc_dvfs_clk = clk_get(NULL, "gpc_dvfs"); > + > + if (gpc_dvfs_clk) { > + clk_enable(gpc_dvfs_clk); > + switch (state) { > + case PM_SUSPEND_MEM: > + mx5_cpu_lp_set(STOP_POWER_OFF); > + break; > + case PM_SUSPEND_STANDBY: > + mx5_cpu_lp_set(WAIT_UNCLOCKED_POWER_OFF); > + break; > + default: > + return -EINVAL; > + } > + > + if (state == PM_SUSPEND_MEM) { > + local_flush_tlb_all(); > + flush_cache_all(); > + > + /*clear the EMPGC0/1 bits */ > + __raw_writel(0, MXC_SRPG_EMPGC0_SRPGCR); > + __raw_writel(0, MXC_SRPG_EMPGC1_SRPGCR); > + } > + cpu_do_idle(); > + clk_disable(gpc_dvfs_clk); > + }else { > + printk(KERN_ERR "Cannot enter SRPG suspend -no gpc_dvfs clock!\n"); > + return -EPERM; > + } > + > + return 0; > +} > + > +static int mx5_pm_valid(suspend_state_t state) > +{ > + return (state > PM_SUSPEND_ON && state <= PM_SUSPEND_MAX); > +} > + > +static const struct platform_suspend_ops mx5_suspend_ops = { > + .valid = mx5_pm_valid, > + .enter = mx5_suspend_enter, > +}; > + > +static int __init mx5_pm_init(void) > +{ > + if (cpu_is_mx51()) > + suspend_set_ops(&mx5_suspend_ops); > + > + return 0; > +} > +device_initcall(mx5_pm_init); > -- > 1.6.0.4 > >
| |