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x86/platform/intel-mid: Run PWRMU command immediately

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On some firmwares we have to tell how exactly we want the command to be
proceeded. The default case, based on the official BSP code, is to run it
immediately.

This appears to be a safer approach based on the documentation.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1471530580-94247-1-git-send-email-andriy.shevchenko@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Andy Shevchenko 2016-08-18 17:29:40 +03:00 committed by Ingo Molnar
parent 3684b03d8e
commit 70b5b18f71
1 changed files with 5 additions and 1 deletions
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6
arch/x86/platform/intel-mid/pwr.c
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@ -44,6 +44,10 @@
/* Bits in PM_CMD */
#define PM_CMD_CMD(x) ((x) << 0)
#define PM_CMD_IOC (1 << 8)
#define PM_CMD_CM_NOP (0 << 9)
#define PM_CMD_CM_IMMEDIATE (1 << 9)
#define PM_CMD_CM_DELAY (2 << 9)
#define PM_CMD_CM_TRIGGER (3 << 9)
#define PM_CMD_D3cold (1 << 21)
/* List of commands */
@ -137,7 +141,7 @@ static int mid_pwr_wait(struct mid_pwr *pwr)
static int mid_pwr_wait_for_cmd(struct mid_pwr *pwr, u8 cmd)
{
writel(PM_CMD_CMD(cmd), pwr->regs + PM_CMD);
writel(PM_CMD_CMD(cmd) | PM_CMD_CM_IMMEDIATE, pwr->regs + PM_CMD);
return mid_pwr_wait(pwr);
}