cr50: fix usb spi to disable resets while doing updates

We need to ignore sys_rst_l right now when we use the usb spi endpoint
to update the AP or EC. We hold the EC and AP in reset and this causes
sys_rst_l to be asserted at the start of updating the AP and when the EC
comes out of reset.

Using the USB SPI endpoint may require doing a bunch of transactions
back to back. Cr50 should not reset itself between each one.

This change postpones the reset until we're done using the usb spi
endpoint. Once sys_rst_l just resets the TPM we can remove all of this.

BUG=chrome-os-partner:52366
BUG=chrome-os-partner:54982
BRANCH=none
TEST=manual
	verify 'util/flash_ec --board=kevin --raiden' updates the EC

	'sudo flashrom -p raiden_debug_spi:target=AP -w $IMG' updates
	the AP

	The AP and cr50 reset after usb_spi is disabled.

Change-Id: I68a76012bc7bf6d3abd073a70f0b90e440d72c49
Signed-off-by: Mary Ruthven <mruthven@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/364051
Reviewed-by: Bill Richardson <wfrichar@chromium.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/chip/g/usb_spi.h b/chip/g/usb_spi.h
index 2002d93e9f..7a31e41d81 100644
--- a/chip/g/usb_spi.h
+++ b/chip/g/usb_spi.h
@@ -228,9 +228,9 @@ void usb_spi_board_enable(struct usb_spi_config const *config);
 void usb_spi_board_disable(struct usb_spi_config const *config);
 
 /*
- * Returns true if AP SPI update is running, needed to properly handle
- * SYS_RST_L input state changes.
+ * Returns true if SPI update is running, needed to properly handle SYS_RST_L
+ * input state changes.
  */
-int ap_spi_update_in_progress(void);
+int usb_spi_update_in_progress(void);
 
 #endif /* __CROS_EC_USB_SPI_H */