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x86: OLPC: move s/r-related EC cmds to EC driver

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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@queued.net>
Acked-by: Paul Fox <pgf@laptop.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Andres Salomon 2012-07-17 01:26:10 -07:00
parent 99ecb01cdf
commit 1fcfd08bd0
2 changed files with 36 additions and 22 deletions
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15
arch/x86/platform/olpc/olpc-xo1-pm.c
View File

@ -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;
}

43
arch/x86/platform/olpc/olpc.c
View File

@ -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 */