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-rw-r--r--src/ec/roda/it8518/ec.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/src/ec/roda/it8518/ec.c b/src/ec/roda/it8518/ec.c
index 707d9e9371..ad51945cef 100644
--- a/src/ec/roda/it8518/ec.c
+++ b/src/ec/roda/it8518/ec.c
@@ -19,6 +19,7 @@
#include <pc80/keyboard.h>
#include <ec/acpi/ec.h>
#include <stdlib.h>
+#include <delay.h>
#include "chip.h"
@@ -29,11 +30,20 @@ static void it8518_init(struct device *dev)
if (!dev->enabled)
return;
- if (conf && conf->cpuhot_limit)
- ec_write(0xb2, conf->cpuhot_limit);
-
printk(BIOS_DEBUG, "Roda IT8518: Initializing keyboard.\n");
pc_keyboard_init(NO_AUX_DEVICE);
+
+ if (conf && conf->cpuhot_limit) {
+ /* The EC may take very long for the first command on a
+ cold boot (~180ms witnessed). Since we need an incre-
+ dibly long timeout, we do this EC RAM write manually. */
+ int timeout = 50000; /* 50,000 * 10us = 500ms */
+ send_ec_command(0x81);
+ while (ec_status() & EC_IBF && --timeout)
+ udelay(10);
+ send_ec_data(0xb2);
+ send_ec_data(conf->cpuhot_limit);
+ }
}
static struct device_operations ops = {