[PATCH 4/5] mailbox: imx: support i.MX93 S401 MU

["Peng Fan (OSS)" <peng.fan@xxxxxxxxxxx>]

From: Peng Fan <peng.fan@xxxxxxx>

i.MX93 S401 MU support two interrupts: tx empty and rx full.

 - introduce a new flag IMX_MU_V2_IRQ for the dual interrupt case
 - Add i.MX93 S401 MU cfg

Signed-off-by: Peng Fan <peng.fan@xxxxxxx>
---
 drivers/mailbox/imx-mailbox.c | 47 ++++++++++++++++++++++++++++-------
 1 file changed, 38 insertions(+), 9 deletions(-)

diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c
index 03699843a6fd..da1c6ca8bee2 100644
--- a/drivers/mailbox/imx-mailbox.c
+++ b/drivers/mailbox/imx-mailbox.c
@@ -28,6 +28,7 @@
 #define IMX_MU_SECO_TX_TOUT (msecs_to_jiffies(3000))
 #define IMX_MU_SECO_RX_TOUT (msecs_to_jiffies(3000))
 
+/* Please not change TX & RX */
 enum imx_mu_chan_type {
 	IMX_MU_TYPE_TX,		/* Tx */
 	IMX_MU_TYPE_RX,		/* Rx */
@@ -92,6 +93,7 @@ enum imx_mu_type {
 	IMX_MU_V1,
 	IMX_MU_V2 = BIT(1),
 	IMX_MU_V2_S4 = BIT(15),
+	IMX_MU_V2_IRQ = BIT(16),
 };
 
 struct imx_mu_dcfg {
@@ -536,7 +538,8 @@ static int imx_mu_startup(struct mbox_chan *chan)
 {
 	struct imx_mu_priv *priv = to_imx_mu_priv(chan->mbox);
 	struct imx_mu_con_priv *cp = chan->con_priv;
-	unsigned long irq_flag = IRQF_SHARED;
+	unsigned long irq_flag = 0;
+	int irq;
 	int ret;
 
 	pm_runtime_get_sync(priv->dev);
@@ -551,11 +554,16 @@ static int imx_mu_startup(struct mbox_chan *chan)
 	if (!priv->dev->pm_domain)
 		irq_flag |= IRQF_NO_SUSPEND;
 
-	ret = request_irq(priv->irq[0], imx_mu_isr, irq_flag,
-			  cp->irq_desc, chan);
+	if (priv->dcfg->type & IMX_MU_V2_IRQ) {
+		irq = priv->irq[cp->type];
+	} else {
+		irq = priv->irq[0];
+		irq_flag |= IRQF_SHARED;
+	}
+
+	ret = request_irq(irq, imx_mu_isr, irq_flag, cp->irq_desc, chan);
 	if (ret) {
-		dev_err(priv->dev,
-			"Unable to acquire IRQ %d\n", priv->irq[0]);
+		dev_err(priv->dev, "Unable to acquire IRQ %d\n", irq);
 		return ret;
 	}
 
@@ -762,14 +770,23 @@ static int imx_mu_probe(struct platform_device *pdev)
 	if (IS_ERR(priv->base))
 		return PTR_ERR(priv->base);
 
-	priv->irq[0] = platform_get_irq(pdev, 0);
-	if (priv->irq[0] < 0)
-		return priv->irq[0];
-
 	dcfg = of_device_get_match_data(dev);
 	if (!dcfg)
 		return -EINVAL;
 	priv->dcfg = dcfg;
+	if (priv->dcfg->type & IMX_MU_V2_IRQ) {
+		priv->irq[IMX_MU_TYPE_TX] = platform_get_irq_byname(pdev, "txirq");
+		if (priv->irq[IMX_MU_TYPE_TX] < 0)
+			return priv->irq[IMX_MU_TYPE_TX];
+		priv->irq[IMX_MU_TYPE_RX] = platform_get_irq_byname(pdev, "rxirq");
+		if (priv->irq[IMX_MU_TYPE_RX] < 0)
+			return priv->irq[IMX_MU_TYPE_RX];
+	} else {
+		priv->irq[0] = platform_get_irq(pdev, 0);
+		if (priv->irq[0] < 0)
+			return priv->irq[0];
+
+	}
 
 	if (priv->dcfg->type & IMX_MU_V2_S4)
 		size = sizeof(struct imx_s4_rpc_msg_max);
@@ -890,6 +907,17 @@ static const struct imx_mu_dcfg imx_mu_cfg_imx8ulp_s4 = {
 	.xCR	= {0x110, 0x114, 0x120, 0x128},
 };
 
+static const struct imx_mu_dcfg imx_mu_cfg_imx93_s4 = {
+	.tx	= imx_mu_specific_tx,
+	.rx	= imx_mu_specific_rx,
+	.init	= imx_mu_init_specific,
+	.type	= IMX_MU_V2 | IMX_MU_V2_S4 | IMX_MU_V2_IRQ,
+	.xTR	= 0x200,
+	.xRR	= 0x280,
+	.xSR	= {0xC, 0x118, 0x124, 0x12C},
+	.xCR	= {0x110, 0x114, 0x120, 0x128},
+};
+
 static const struct imx_mu_dcfg imx_mu_cfg_imx8_scu = {
 	.tx	= imx_mu_specific_tx,
 	.rx	= imx_mu_specific_rx,
@@ -917,6 +945,7 @@ static const struct of_device_id imx_mu_dt_ids[] = {
 	{ .compatible = "fsl,imx6sx-mu", .data = &imx_mu_cfg_imx6sx },
 	{ .compatible = "fsl,imx8ulp-mu", .data = &imx_mu_cfg_imx8ulp },
 	{ .compatible = "fsl,imx8ulp-mu-s4", .data = &imx_mu_cfg_imx8ulp_s4 },
+	{ .compatible = "fsl,imx93-mu-s4", .data = &imx_mu_cfg_imx93_s4 },
 	{ .compatible = "fsl,imx8-mu-scu", .data = &imx_mu_cfg_imx8_scu },
 	{ .compatible = "fsl,imx8-mu-seco", .data = &imx_mu_cfg_imx8_seco },
 	{ },
-- 
2.25.1