linux-kernel - [PATCH 09/11] x86, olpc-xo1-sci: Propagate power supply/battery events

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Message-Id: <1304166750-31125-10-git-send-email-dsd@laptop.org>
Date:	Sat, 30 Apr 2011 13:32:28 +0100
From:	Daniel Drake <dsd@...top.org>
To:	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com, x86@...nel.org
Cc:	linux-kernel@...r.kernel.org, dilinger@...ued.net,
	Daniel Drake <dsd@...top.org>
Subject: [PATCH 09/11] x86, olpc-xo1-sci: Propagate power supply/battery events

EC events indicate change in AC power connectivity, battery state of
charge, battery error, battery presence, etc. Send notifications to
the power supply subsystem when changes are detected.

Signed-off-by: Daniel Drake <dsd@...top.org>
---
 arch/x86/Kconfig                      |    4 ++-
 arch/x86/platform/olpc/olpc-xo1-sci.c |   37 +++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+), 1 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index c40cd82..583e1c5 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2074,13 +2074,15 @@ config OLPC_XO1_PM
 
 config OLPC_XO1_SCI
 	bool "OLPC XO-1 SCI extras"
-	depends on OLPC && OLPC_XO1_PM
+	depends on OLPC && OLPC_XO1_PM && POWER_SUPPLY
 	---help---
 	  Add support for SCI-based features of the OLPC XO-1 laptop:
 	   - EC-driven system wakeups
 	   - Power button
 	   - Ebook switch
 	   - Lid switch
+	   - AC adapter status updates
+	   - Battery status updates
 
 endif # X86_32
 
diff --git a/arch/x86/platform/olpc/olpc-xo1-sci.c b/arch/x86/platform/olpc/olpc-xo1-sci.c
index 176e4ae..1cd800e 100644
--- a/arch/x86/platform/olpc/olpc-xo1-sci.c
+++ b/arch/x86/platform/olpc/olpc-xo1-sci.c
@@ -19,6 +19,7 @@
 #include <linux/platform_device.h>
 #include <linux/pm.h>
 #include <linux/mfd/core.h>
+#include <linux/power_supply.h>
 #include <linux/suspend.h>
 #include <linux/workqueue.h>
 
@@ -52,6 +53,26 @@ static const char * const lid_wake_mode_names[] = {
 	[LID_WAKE_CLOSE] = "close",
 };
 
+static void battery_status_changed(void)
+{
+	struct power_supply *psy = power_supply_get_by_name("olpc-battery");
+
+	if (psy) {
+		power_supply_changed(psy);
+		put_device(psy->dev);
+	}
+}
+
+static void ac_status_changed(void)
+{
+	struct power_supply *psy = power_supply_get_by_name("olpc-ac");
+
+	if (psy) {
+		power_supply_changed(psy);
+		put_device(psy->dev);
+	}
+}
+
 /* Report current ebook switch state through input layer */
 static void send_ebook_state(void)
 {
@@ -151,6 +172,18 @@ static void process_sci_queue(bool propagate_events)
 
 		pr_debug(PFX "SCI 0x%x received\n", data);
 
+		switch (data) {
+		case EC_SCI_SRC_BATERR:
+		case EC_SCI_SRC_BATSOC:
+		case EC_SCI_SRC_BATTERY:
+		case EC_SCI_SRC_BATCRIT:
+			battery_status_changed();
+			break;
+		case EC_SCI_SRC_ACPWR:
+			ac_status_changed();
+			break;
+		}
+
 		if (data == EC_SCI_SRC_EBOOK && propagate_events)
 			send_ebook_state();
 	} while (data);
@@ -240,6 +273,10 @@ static int xo1_sci_resume(struct platform_device *pdev)
 
 	/* Enable all EC events */
 	olpc_ec_mask_write(EC_SCI_SRC_ALL);
+
+	/* Power/battery status might have changed too */
+	battery_status_changed();
+	ac_status_changed();
 	return 0;
 }
 
-- 
1.7.4.4

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