From 375cac70100b58ce8f4737ec530bfbdcb3086964 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Wed, 25 Jul 2018 14:57:21 +1000 Subject: fsi: master-ast-cf: Mask unused bits in RTAG/RCRC Then reading the RTAG/RCRC "registers" from the coprocessor after a command is complete, mask out the top bits, only keep the relevant bits. Microcode v5 will leave garbage in those top bits as a result of a performance optimization. Signed-off-by: Benjamin Herrenschmidt --- --- drivers/fsi/fsi-master-ast-cf.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/fsi') diff --git a/drivers/fsi/fsi-master-ast-cf.c b/drivers/fsi/fsi-master-ast-cf.c index c4a35579bfdc..b59abcf3ee32 100644 --- a/drivers/fsi/fsi-master-ast-cf.c +++ b/drivers/fsi/fsi-master-ast-cf.c @@ -377,8 +377,8 @@ static int send_request(struct fsi_master_acf *master, struct fsi_msg *cmd, static int read_copro_response(struct fsi_master_acf *master, uint8_t size, uint32_t *response, u8 *tag) { - uint8_t rtag = ioread8(master->sram + STAT_RTAG); - uint8_t rcrc = ioread8(master->sram + STAT_RCRC); + uint8_t rtag = ioread8(master->sram + STAT_RTAG) & 0xf; + uint8_t rcrc = ioread8(master->sram + STAT_RCRC) & 0xf; uint32_t rdata = 0; uint32_t crc; uint8_t ack; -- cgit