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Date: Wed, 18 Jul 2012 21:29:20 -0700
From: Andres Salomon <dilinger@...ued.net>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Paul Fox <pgf@...top.org>, Daniel Drake <dsd@...top.org>,
"Richard A. Smith" <richard@...top.org>,
linux-kernel@...r.kernel.org, libertas-dev@...ts.infradead.org,
linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
platform-driver-x86@...r.kernel.org, devel@...verdev.osuosl.org,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
Dan Williams <dcbw@...hat.com>,
"John W. Linville" <linville@...driver.com>,
Matthew Garrett <mjg@...hat.com>,
Anton Vorontsov <cbou@...l.ru>,
David Woodhouse <dwmw2@...radead.org>,
Chris Ball <cjb@...top.org>,
Jon Nettleton <jon.nettleton@...il.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 9/9] x86: OLPC: move s/r-related EC cmds to EC driver
The new EC driver calls platform-specific suspend and resume hooks; run
XO-1-specific EC commands from there, rather than deep in s/r code. If
we attempt to run EC commands after the new EC driver has suspended, it
is refused by the ec->suspended checks.
Signed-off-by: Andres Salomon <dilinger@...ued.net>
---
arch/x86/platform/olpc/olpc-xo1-pm.c | 15 ------------
arch/x86/platform/olpc/olpc.c | 43
++++++++++++++++++++++++++++----- 2 files changed, 36 insertions(+), 22
deletions(-)
diff --git a/arch/x86/platform/olpc/olpc-xo1-pm.c
b/arch/x86/platform/olpc/olpc-xo1-pm.c index 8054b64..d75582d 100644
--- a/arch/x86/platform/olpc/olpc-xo1-pm.c
+++ b/arch/x86/platform/olpc/olpc-xo1-pm.c
@@ -52,16 +52,11 @@ EXPORT_SYMBOL_GPL(olpc_xo1_pm_wakeup_clear);
static int xo1_power_state_enter(suspend_state_t pm_state)
{
unsigned long saved_sci_mask;
- int r;
/* Only STR is supported */
if (pm_state != PM_SUSPEND_MEM)
return -EINVAL;
- r = olpc_ec_cmd(EC_SET_SCI_INHIBIT, NULL, 0, NULL, 0);
- if (r)
- return r;
-
/*
* Save SCI mask (this gets lost since PM1_EN is used as a
mask for
* wakeup events, which is not necessarily the same event set)
@@ -77,16 +72,6 @@ static int xo1_power_state_enter(suspend_state_t
pm_state) /* Restore SCI mask (using dword access to CS5536_PM1_EN) */
outl(saved_sci_mask, acpi_base + CS5536_PM1_STS);
- /* Tell the EC to stop inhibiting SCIs */
- olpc_ec_cmd(EC_SET_SCI_INHIBIT_RELEASE, NULL, 0, NULL, 0);
-
- /*
- * Tell the wireless module to restart USB communication.
- * Must be done twice.
- */
- olpc_ec_cmd(EC_WAKE_UP_WLAN, NULL, 0, NULL, 0);
- olpc_ec_cmd(EC_WAKE_UP_WLAN, NULL, 0, NULL, 0);
-
return 0;
}
diff --git a/arch/x86/platform/olpc/olpc.c
b/arch/x86/platform/olpc/olpc.c index ed41b43..2737608 100644
--- a/arch/x86/platform/olpc/olpc.c
+++ b/arch/x86/platform/olpc/olpc.c
@@ -263,11 +263,6 @@ int olpc_ec_sci_query(u16 *sci_value)
}
EXPORT_SYMBOL_GPL(olpc_ec_sci_query);
-static int olpc_ec_suspend(struct platform_device *pdev)
-{
- return olpc_ec_mask_write(ec_wakeup_mask);
-}
-
static bool __init check_ofw_architecture(struct device_node *root)
{
const char *olpc_arch;
@@ -339,9 +334,40 @@ static int olpc_xo1_ec_probe(struct
platform_device *pdev)
return 0;
}
+static int olpc_xo1_ec_suspend(struct platform_device *pdev)
+{
+ olpc_ec_mask_write(ec_wakeup_mask);
+
+ /*
+ * Squelch SCIs while suspended. This is a fix for
+ * <http://dev.laptop.org/ticket/1835>.
+ */
+ return olpc_ec_cmd(EC_SET_SCI_INHIBIT, NULL, 0, NULL, 0);
+}
+
+static int olpc_xo1_ec_resume(struct platform_device *pdev)
+{
+ /* Tell the EC to stop inhibiting SCIs */
+ olpc_ec_cmd(EC_SET_SCI_INHIBIT_RELEASE, NULL, 0, NULL, 0);
+
+ /*
+ * Tell the wireless module to restart USB communication.
+ * Must be done twice.
+ */
+ olpc_ec_cmd(EC_WAKE_UP_WLAN, NULL, 0, NULL, 0);
+ olpc_ec_cmd(EC_WAKE_UP_WLAN, NULL, 0, NULL, 0);
+
+ return 0;
+}
static struct olpc_ec_driver ec_xo1_driver = {
- .suspend = olpc_ec_suspend,
+ .probe = olpc_xo1_ec_probe,
+ .suspend = olpc_xo1_ec_suspend,
+ .resume = olpc_xo1_ec_resume,
+ .ec_cmd = olpc_xo1_ec_cmd,
+};
+
+static struct olpc_ec_driver ec_xo1_5_driver = {
.probe = olpc_xo1_ec_probe,
.ec_cmd = olpc_xo1_ec_cmd,
};
@@ -354,7 +380,10 @@ static int __init olpc_init(void)
return 0;
/* register the XO-1 and 1.5-specific EC handler */
- olpc_ec_driver_register(&ec_xo1_driver, NULL);
+ if (olpc_platform_info.boardrev <
olpc_board_pre(0xd0)) /* XO-1 */
+ olpc_ec_driver_register(&ec_xo1_driver, NULL);
+ else
+ olpc_ec_driver_register(&ec_xo1_5_driver, NULL);
platform_device_register_simple("olpc-ec", -1, NULL, 0);
/* assume B1 and above models always have a DCON */
--
1.7.2.5
--
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