i3c: master: svc: Flush FIFO before sending Dynamic Address Assignment(DAA)

Ensure the FIFO is empty before issuing the DAA command to prevent
incorrect command data from being sent. Align with other data transfers,
such as svc_i3c_master_start_xfer_locked(), which flushes the FIFO before
sending a command.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20250129162250.3629189-1-Frank.Li@nxp.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index 413479b12ba696a6dccdd4238e17398d8d4c856a..98f800f999691438dfcf7f156d3815bca8a383a6 100644 (file)
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -892,6 +892,8 @@ static int svc_i3c_master_do_daa_locked(struct svc_i3c_master *master,
        u32 reg;
        int ret, i;
 
+       svc_i3c_master_flush_fifo(master);
+
        while (true) {
                /* clean SVC_I3C_MINT_IBIWON w1c bits */
                writel(SVC_I3C_MINT_IBIWON, master->regs + SVC_I3C_MSTATUS);