x86, olpc-xo1-sci: Add GPE handler and ebook switch functionality
The EC in the OLPC XO-1 delivers GPE events to provide various
notifications. Add the basic code for GPE/EC event processing and
enable the ebook switch, which can be used as a wakeup source.
Signed-off-by: Daniel Drake <dsd@laptop.org>
Link: http://lkml.kernel.org/r/1309019658-1712-8-git-send-email-dsd@laptop.org
Acked-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
diff --git a/include/linux/cs5535.h b/include/linux/cs5535.h
index 6f78235..d7e9a7f 100644
--- a/include/linux/cs5535.h
+++ b/include/linux/cs5535.h
@@ -11,6 +11,8 @@
#ifndef _CS5535_H
#define _CS5535_H
+#include <asm/msr.h>
+
/* MSRs */
#define MSR_GLIU_P2D_RO0 0x10000029
@@ -43,6 +45,18 @@
#define MSR_GX_GLD_MSR_CONFIG 0xC0002001
#define MSR_GX_MSR_PADSEL 0xC0002011
+static inline int cs5535_pic_unreqz_select_high(unsigned int group,
+ unsigned int irq)
+{
+ uint32_t lo, hi;
+
+ rdmsr(MSR_PIC_ZSEL_HIGH, lo, hi);
+ lo &= ~(0xF << (group * 4));
+ lo |= (irq & 0xF) << (group * 4);
+ wrmsr(MSR_PIC_ZSEL_HIGH, lo, hi);
+ return 0;
+}
+
/* PIC registers */
#define CS5536_PIC_INT_SEL1 0x4d0
#define CS5536_PIC_INT_SEL2 0x4d1
@@ -73,6 +87,7 @@
#define CS5536_PM1_EN 0x02
#define CS5536_PM1_CNT 0x08
#define CS5536_PM_GPE0_STS 0x18
+#define CS5536_PM_GPE0_EN 0x1c
/* CS5536_PM1_STS bits */
#define CS5536_WAK_FLAG (1 << 15)
@@ -81,6 +96,13 @@
/* CS5536_PM1_EN bits */
#define CS5536_PM_PWRBTN (1 << 8)
+/* CS5536_PM_GPE0_STS bits */
+#define CS5536_GPIOM7_PME_FLAG (1 << 31)
+#define CS5536_GPIOM6_PME_FLAG (1 << 30)
+
+/* CS5536_PM_GPE0_EN bits */
+#define CS5536_GPIOM7_PME_EN (1 << 31)
+
/* VSA2 magic values */
#define VSA_VRC_INDEX 0xAC1C
#define VSA_VRC_DATA 0xAC1E