diff options
Diffstat (limited to 'drivers/misc/imx_ele')
| -rw-r--r-- | drivers/misc/imx_ele/ele_mu.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/misc/imx_ele/ele_mu.c b/drivers/misc/imx_ele/ele_mu.c index f5ba3a4ffa5..cdb85b999db 100644 --- a/drivers/misc/imx_ele/ele_mu.c +++ b/drivers/misc/imx_ele/ele_mu.c @@ -25,9 +25,20 @@ struct imx8ulp_mu { void mu_hal_init(ulong base) { struct mu_type *mu_base = (struct mu_type *)base; + u32 rr_num = (readl(&mu_base->par) & 0xFF00) >> 8; + int i; writel(0, &mu_base->tcr); writel(0, &mu_base->rcr); + + while (true) { + /* If there is pending RX data, clear them by read them out */ + if (!(readl(&mu_base->sr) & BIT(6))) + return; + + for (i = 0; i < rr_num; i++) + readl(&mu_base->rr[i]); + } } int mu_hal_sendmsg(ulong base, u32 reg_index, u32 msg) |