Document
ATWILC1000/ATWILC3000
Baremetal Wi-Fi/BLE Link Controller Software Design Guide
https://tinyurl.com/yer2xhyc
says that bit 0 of the CRC7 code must always be a 1.
I confirmed that today with a logic analyzer: setting bit 0 causes
wilc1000 to accept a command with CRC7 enabled, whereas clearing bit 0
causes wilc1000 to reject the command with a CRC error.
Signed-off-by: David Mosberger-Tang <davidm@xxxxxxxxxx>
---
drivers/net/wireless/microchip/wilc1000/spi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/microchip/wilc1000/spi.c b/drivers/net/wireless/microchip/wilc1000/spi.c
index 7eb0f8a421a3..b9ed88d9c33d 100644
--- a/drivers/net/wireless/microchip/wilc1000/spi.c
+++ b/drivers/net/wireless/microchip/wilc1000/spi.c
@@ -472,7 +472,7 @@ static int spi_data_write(struct wilc *wilc, u8 *b, u32 sz)
********************************************/
static u8 wilc_get_crc7(u8 *buffer, u32 len)
{
- return crc7_be(0xfe, buffer, len);
+ return crc7_be(0xfe, buffer, len) | 0x01;
}
static int wilc_spi_single_read(struct wilc *wilc, u8 cmd, u32 adr, void *b,
--
2.34.1
