linux-kernel - [PATCH v1 1/1] x86/platform/intel-mid: Run PWRMU command immediately

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Date:	Thu, 18 Aug 2016 13:07:55 +0300
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 1/1] x86/platform/intel-mid: Run PWRMU command immediately

On some firmwares we have to tell how exactly we want the command to be run.
The default case for now is to run it immediately.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 arch/x86/platform/intel-mid/pwr.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/x86/platform/intel-mid/pwr.c b/arch/x86/platform/intel-mid/pwr.c
index c901a34..0548741 100644
--- a/arch/x86/platform/intel-mid/pwr.c
+++ b/arch/x86/platform/intel-mid/pwr.c
@@ -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);
 }
 
-- 
2.8.1