mailbox: imx: introduce rxdb callback

Add a rxdb callback to prepare for i.MX8 SECO MU rxdb which has a
different logic.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>

diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c
index a29f800..399e126 100644 (file)
--- a/drivers/mailbox/imx-mailbox.c
+++ b/drivers/mailbox/imx-mailbox.c
@@ -93,6 +93,7 @@ enum imx_mu_type {
 struct imx_mu_dcfg {
        int (*tx)(struct imx_mu_priv *priv, struct imx_mu_con_priv *cp, void *data);
        int (*rx)(struct imx_mu_priv *priv, struct imx_mu_con_priv *cp);
+       int (*rxdb)(struct imx_mu_priv *priv, struct imx_mu_con_priv *cp);
        void (*init)(struct imx_mu_priv *priv);
        enum imx_mu_type type;
        u32     xTR;            /* Transmit Register0 */
@@ -179,6 +180,16 @@ static int imx_mu_generic_rx(struct imx_mu_priv *priv,
        return 0;
 }
 
+static int imx_mu_generic_rxdb(struct imx_mu_priv *priv,
+                              struct imx_mu_con_priv *cp)
+{
+       imx_mu_write(priv, IMX_MU_xSR_GIPn(priv->dcfg->type, cp->idx),
+                    priv->dcfg->xSR[IMX_MU_GSR]);
+       mbox_chan_received_data(cp->chan, NULL);
+
+       return 0;
+}
+
 static int imx_mu_specific_tx(struct imx_mu_priv *priv, struct imx_mu_con_priv *cp, void *data)
 {
        u32 *arg = data;
@@ -329,9 +340,7 @@ static irqreturn_t imx_mu_isr(int irq, void *p)
                priv->dcfg->rx(priv, cp);
        } else if ((val == IMX_MU_xSR_GIPn(priv->dcfg->type, cp->idx)) &&
                   (cp->type == IMX_MU_TYPE_RXDB)) {
-               imx_mu_write(priv, IMX_MU_xSR_GIPn(priv->dcfg->type, cp->idx),
-                            priv->dcfg->xSR[IMX_MU_GSR]);
-               mbox_chan_received_data(chan, NULL);
+               priv->dcfg->rxdb(priv, cp);
        } else {
                dev_warn_ratelimited(priv->dev, "Not handled interrupt\n");
                return IRQ_NONE;
@@ -639,6 +648,7 @@ static int imx_mu_remove(struct platform_device *pdev)
 static const struct imx_mu_dcfg imx_mu_cfg_imx6sx = {
        .tx     = imx_mu_generic_tx,
        .rx     = imx_mu_generic_rx,
+       .rxdb   = imx_mu_generic_rxdb,
        .init   = imx_mu_init_generic,
        .xTR    = 0x0,
        .xRR    = 0x10,
@@ -649,6 +659,7 @@ static const struct imx_mu_dcfg imx_mu_cfg_imx6sx = {
 static const struct imx_mu_dcfg imx_mu_cfg_imx7ulp = {
        .tx     = imx_mu_generic_tx,
        .rx     = imx_mu_generic_rx,
+       .rxdb   = imx_mu_generic_rxdb,
        .init   = imx_mu_init_generic,
        .xTR    = 0x20,
        .xRR    = 0x40,
@@ -659,7 +670,9 @@ static const struct imx_mu_dcfg imx_mu_cfg_imx7ulp = {
 static const struct imx_mu_dcfg imx_mu_cfg_imx8ulp = {
        .tx     = imx_mu_generic_tx,
        .rx     = imx_mu_generic_rx,
+       .rxdb   = imx_mu_generic_rxdb,
        .init   = imx_mu_init_generic,
+       .rxdb   = imx_mu_generic_rxdb,
        .type   = IMX_MU_V2,
        .xTR    = 0x200,
        .xRR    = 0x280,
@@ -682,6 +695,7 @@ static const struct imx_mu_dcfg imx_mu_cfg_imx8_scu = {
        .tx     = imx_mu_specific_tx,
        .rx     = imx_mu_specific_rx,
        .init   = imx_mu_init_specific,
+       .rxdb   = imx_mu_generic_rxdb,
        .xTR    = 0x0,
        .xRR    = 0x10,
        .xSR    = {0x20, 0x20, 0x20, 0x20},