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Commit 70b5b18f authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Ingo Molnar
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x86/platform/intel-mid: Run PWRMU command immediately 



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: default avatarAndy 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: default avatarIngo Molnar <mingo@kernel.org>
parent 3684b03d

arch/x86/platform/intel-mid/pwr.c

+5 −1
Original line number Diff line number Diff line
@@ -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);

}