diff options
| author | Peng Fan <peng.fan@nxp.com> | 2022-08-03 10:53:26 +0300 |
|---|---|---|
| committer | Jassi Brar <jaswinder.singh@linaro.org> | 2022-08-03 17:48:13 +0300 |
| commit | 8a8dc2b9596e6088522d30bc79306b834c681943 (patch) | |
| tree | bcd5a8b8823b08f60e299f8b67fee3681bb422bb /drivers/mailbox | |
| parent | 1a607e102fe0f04491fb69c5a233aad139d9d1d6 (diff) | |
| download | linux-8a8dc2b9596e6088522d30bc79306b834c681943.tar.xz | |
mailbox: imx: clear pending interrupts
During MU initialization, there maybe pending GSR and RSR pending
interrupt, clear them to avoid unexpected kernel dump when requesting
mailbox channel
Reviewed-by: Jacky Bai <ping.bai@nxp.com>
Reviewed-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Diffstat (limited to 'drivers/mailbox')
| -rw-r--r-- | drivers/mailbox/imx-mailbox.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c index 37fc765783f8..02922073c9ef 100644 --- a/drivers/mailbox/imx-mailbox.c +++ b/drivers/mailbox/imx-mailbox.c @@ -26,6 +26,8 @@ #define IMX_MU_S4_CHANS 2 #define IMX_MU_CHAN_NAME_SIZE 20 +#define IMX_MU_NUM_RR 4 + #define IMX_MU_SECO_TX_TOUT (msecs_to_jiffies(3000)) #define IMX_MU_SECO_RX_TOUT (msecs_to_jiffies(3000)) @@ -711,6 +713,7 @@ static struct mbox_chan *imx_mu_seco_xlate(struct mbox_controller *mbox, static void imx_mu_init_generic(struct imx_mu_priv *priv) { unsigned int i; + unsigned int val; for (i = 0; i < IMX_MU_CHANS; i++) { struct imx_mu_con_priv *cp = &priv->con_priv[i]; @@ -732,6 +735,14 @@ static void imx_mu_init_generic(struct imx_mu_priv *priv) /* Set default MU configuration */ for (i = 0; i < IMX_MU_xCR_MAX; i++) imx_mu_write(priv, 0, priv->dcfg->xCR[i]); + + /* Clear any pending GIP */ + val = imx_mu_read(priv, priv->dcfg->xSR[IMX_MU_GSR]); + imx_mu_write(priv, val, priv->dcfg->xSR[IMX_MU_GSR]); + + /* Clear any pending RSR */ + for (i = 0; i < IMX_MU_NUM_RR; i++) + imx_mu_read(priv, priv->dcfg->xRR + (i % 4) * 4); } static void imx_mu_init_specific(struct imx_mu_priv *priv) |