ec/google/wilco: Save and restore PS/2 data for S3
Send a command to the EC on the way into S3 suspend state telling it to save the PS/2 data, and on resume send it a command for restoring the PS/2 data that was previously saved. Change-Id: Ic4b5d6d2656dbb1c476b9211b0d60c71b0cd7b32 Signed-off-by: Duncan Laurie <dlaurie@google.com> Reviewed-on: https://review.coreboot.org/29120 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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@ -44,6 +44,12 @@ static void wilco_ec_post_video_init(void *unused)
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BOOT_STATE_INIT_ENTRY(BS_DEV_INIT, BS_ON_EXIT,
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wilco_ec_post_video_init, NULL);
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static void wilco_ec_resume(void *unused)
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{
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wilco_ec_send_noargs(KB_RESTORE);
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}
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BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_ENTRY, wilco_ec_resume, NULL);
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static void wilco_ec_init(struct device *dev)
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{
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if (!dev->enabled)
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@ -26,6 +26,10 @@ enum {
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KB_POWER_STATUS = 0x05,
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/* Inform the EC aboout the reason host is turning off */
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KB_POWER_OFF = 0x08,
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/* Save PS/2 data before S3 suspend */
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KB_SAVE = 0x2f,
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/* Restore PS/2 data after S3 resume */
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KB_RESTORE = 0x30,
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/* Retrieve information about the EC */
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KB_EC_INFO = 0x38,
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/* Set ACPI mode on or off */
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@ -25,6 +25,7 @@ void wilco_ec_smi_sleep(int slp_type)
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{
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switch (slp_type) {
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case ACPI_S3:
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wilco_ec_send_noargs(KB_SAVE);
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wilco_ec_slp_en();
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break;
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case ACPI_S5:
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