- apple: implement poll and flush callbacks

- qcom: fix clocks for IPQ6018 and IPQ8074
 		irq handler as not-a-thread
 - microchip: split reg-space into two
 - imx: RST channel fix
 - bcm: fix dma_map_sg error handling
 - misc: spellinf fix in pcc driver
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Merge tag 'mailbox-v6.1' of git://git.linaro.org/landing-teams/working/fujitsu/integration

Pull mailbox updates from Jassi Brar:

 - apple: implement poll and flush callbacks

 - qcom: fix clocks for IPQ6018 and IPQ8074 irq handler as not-a-thread

 - microchip: split reg-space into two

 - imx: RST channel fix

 - bcm: fix dma_map_sg error handling

 - misc: spelling fix in pcc driver

* tag 'mailbox-v6.1' of git://git.linaro.org/landing-teams/working/fujitsu/integration:
  mailbox: qcom-ipcc: flag IRQ NO_THREAD
  mailbox: pcc: Fix spelling mistake "Plaform" -> "Platform"
  mailbox: bcm-ferxrm-mailbox: Fix error check for dma_map_sg
  mailbox: qcom-apcs-ipc: add IPQ8074 APSS clock support
  dt-bindings: mailbox: qcom: correct clocks for IPQ6018 and IPQ8074
  dt-bindings: mailbox: qcom: set correct #clock-cells
  mailbox: mpfs: account for mbox offsets while sending
  mailbox: mpfs: fix handling of the reg property
  dt-bindings: mailbox: fix the mpfs' reg property
  mailbox: imx: fix RST channel support
  mailbox: apple: Implement poll_data() operation
  mailbox: apple: Implement flush() operation

Documentation/devicetree/bindings/mailbox/microchip,mpfs-mailbox.yaml

@@ -14,9 +14,15 @@ properties:
     const: microchip,mpfs-mailbox
 
   reg:
-    items:
+    oneOf:
-      - description: mailbox data registers
+      - items:
-      - description: mailbox interrupt registers
+          - description: mailbox control & data registers
+          - description: mailbox interrupt registers
+        deprecated: true
+      - items:
+          - description: mailbox control registers
+          - description: mailbox interrupt registers
+          - description: mailbox data registers
 
   interrupts:
     maxItems: 1
@@ -39,7 +45,8 @@ examples:
       #size-cells = <2>;
       mbox: mailbox@37020000 {
         compatible = "microchip,mpfs-mailbox";
-        reg = <0x0 0x37020000 0x0 0x1000>, <0x0 0x2000318c 0x0 0x40>;
+        reg = <0x0 0x37020000 0x0 0x58>, <0x0 0x2000318C 0x0 0x40>,
+              <0x0 0x37020800 0x0 0x100>;
         interrupt-parent = <&L1>;
         interrupts = <96>;
         #mbox-cells = <1>;

Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.yaml

@@ -45,23 +45,17 @@ properties:
   clocks:
     description: phandles to the parent clocks of the clock driver
     minItems: 2
-    items:
+    maxItems: 3
-      - description: primary pll parent of the clock driver
-      - description: auxiliary parent
-      - description: reference clock
 
   '#mbox-cells':
     const: 1
 
   '#clock-cells':
-    const: 0
+    enum: [0, 1]
 
   clock-names:
     minItems: 2
-    items:
+    maxItems: 3
-      - const: pll
-      - const: aux
-      - const: ref
 
 required:
   - compatible
@@ -75,8 +69,6 @@ allOf:
       properties:
         compatible:
           enum:
-            - qcom,ipq6018-apcs-apps-global
-            - qcom,ipq8074-apcs-apps-global
             - qcom,msm8916-apcs-kpss-global
             - qcom,msm8994-apcs-kpss-global
             - qcom,msm8996-apcs-hmss-global
@@ -90,7 +82,13 @@ allOf:
     then:
       properties:
         clocks:
-          maxItems: 2
+          items:
+            - description: primary pll parent of the clock driver
+            - description: auxiliary parent
+        clock-names:
+          items:
+            - const: pll
+            - const: aux
   - if:
       properties:
         compatible:
@@ -99,7 +97,46 @@ allOf:
     then:
       properties:
         clocks:
-          maxItems: 3
+          items:
+            - description: primary pll parent of the clock driver
+            - description: auxiliary parent
+            - description: reference clock
+        clock-names:
+          items:
+            - const: pll
+            - const: aux
+            - const: ref
+  - if:
+      properties:
+        compatible:
+          enum:
+            - qcom,ipq6018-apcs-apps-global
+            - qcom,ipq8074-apcs-apps-global
+    then:
+      properties:
+        clocks:
+          items:
+            - description: primary pll parent of the clock driver
+            - description: XO clock
+        clock-names:
+          items:
+            - const: pll
+            - const: xo
+  - if:
+      properties:
+        compatible:
+          enum:
+            - qcom,ipq6018-apcs-apps-global
+            - qcom,ipq8074-apcs-apps-global
+    then:
+      properties:
+        '#clock-cells':
+          const: 1
+    else:
+      properties:
+        '#clock-cells':
+          const: 0
+
 examples:
 
   # Example apcs with msm8996

drivers/mailbox/apple-mailbox.c

@@ -17,6 +17,7 @@
  */
 
 #include <linux/apple-mailbox.h>
+#include <linux/delay.h>
 #include <linux/device.h>
 #include <linux/gfp.h>
 #include <linux/interrupt.h>
@@ -25,6 +26,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
+#include <linux/spinlock.h>
 #include <linux/types.h>
 
 #define APPLE_ASC_MBOX_CONTROL_FULL  BIT(16)
@@ -100,6 +102,7 @@ struct apple_mbox {
 
 	struct device *dev;
 	struct mbox_controller controller;
+	spinlock_t rx_lock;
 };
 
 static const struct of_device_id apple_mbox_of_match[];
@@ -112,6 +115,14 @@ static bool apple_mbox_hw_can_send(struct apple_mbox *apple_mbox)
 	return !(mbox_ctrl & apple_mbox->hw->control_full);
 }
 
+static bool apple_mbox_hw_send_empty(struct apple_mbox *apple_mbox)
+{
+	u32 mbox_ctrl =
+		readl_relaxed(apple_mbox->regs + apple_mbox->hw->a2i_control);
+
+	return mbox_ctrl & apple_mbox->hw->control_empty;
+}
+
 static int apple_mbox_hw_send(struct apple_mbox *apple_mbox,
 			      struct apple_mbox_msg *msg)
 {
@@ -195,13 +206,15 @@ static irqreturn_t apple_mbox_send_empty_irq(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-static irqreturn_t apple_mbox_recv_irq(int irq, void *data)
+static int apple_mbox_poll(struct apple_mbox *apple_mbox)
 {
-	struct apple_mbox *apple_mbox = data;
 	struct apple_mbox_msg msg;
+	int ret = 0;
 
-	while (apple_mbox_hw_recv(apple_mbox, &msg) == 0)
+	while (apple_mbox_hw_recv(apple_mbox, &msg) == 0) {
 		mbox_chan_received_data(&apple_mbox->chan, (void *)&msg);
+		ret++;
+	}
 
 	/*
 	 * The interrupt will keep firing even if there are no more messages
@@ -216,9 +229,50 @@ static irqreturn_t apple_mbox_recv_irq(int irq, void *data)
 			       apple_mbox->regs + apple_mbox->hw->irq_ack);
 	}
 
+	return ret;
+}
+
+static irqreturn_t apple_mbox_recv_irq(int irq, void *data)
+{
+	struct apple_mbox *apple_mbox = data;
+
+	spin_lock(&apple_mbox->rx_lock);
+	apple_mbox_poll(apple_mbox);
+	spin_unlock(&apple_mbox->rx_lock);
+
 	return IRQ_HANDLED;
 }
 
+static bool apple_mbox_chan_peek_data(struct mbox_chan *chan)
+{
+	struct apple_mbox *apple_mbox = chan->con_priv;
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&apple_mbox->rx_lock, flags);
+	ret = apple_mbox_poll(apple_mbox);
+	spin_unlock_irqrestore(&apple_mbox->rx_lock, flags);
+
+	return ret > 0;
+}
+
+static int apple_mbox_chan_flush(struct mbox_chan *chan, unsigned long timeout)
+{
+	struct apple_mbox *apple_mbox = chan->con_priv;
+	unsigned long deadline = jiffies + msecs_to_jiffies(timeout);
+
+	while (time_before(jiffies, deadline)) {
+		if (apple_mbox_hw_send_empty(apple_mbox)) {
+			mbox_chan_txdone(&apple_mbox->chan, 0);
+			return 0;
+		}
+
+		udelay(1);
+	}
+
+	return -ETIME;
+}
+
 static int apple_mbox_chan_startup(struct mbox_chan *chan)
 {
 	struct apple_mbox *apple_mbox = chan->con_priv;
@@ -250,6 +304,8 @@ static void apple_mbox_chan_shutdown(struct mbox_chan *chan)
 
 static const struct mbox_chan_ops apple_mbox_ops = {
 	.send_data = apple_mbox_chan_send_data,
+	.peek_data = apple_mbox_chan_peek_data,
+	.flush = apple_mbox_chan_flush,
 	.startup = apple_mbox_chan_startup,
 	.shutdown = apple_mbox_chan_shutdown,
 };
@@ -304,6 +360,7 @@ static int apple_mbox_probe(struct platform_device *pdev)
 	mbox->controller.txdone_irq = true;
 	mbox->controller.of_xlate = apple_mbox_of_xlate;
 	mbox->chan.con_priv = mbox;
+	spin_lock_init(&mbox->rx_lock);
 
 	irqname = devm_kasprintf(dev, GFP_KERNEL, "%s-recv", dev_name(dev));
 	if (!irqname)

drivers/mailbox/bcm-flexrm-mailbox.c

@@ -622,15 +622,15 @@ static int flexrm_spu_dma_map(struct device *dev, struct brcm_message *msg)
 
 	rc = dma_map_sg(dev, msg->spu.src, sg_nents(msg->spu.src),
 			DMA_TO_DEVICE);
-	if (rc < 0)
+	if (!rc)
-		return rc;
+		return -EIO;
 
 	rc = dma_map_sg(dev, msg->spu.dst, sg_nents(msg->spu.dst),
 			DMA_FROM_DEVICE);
-	if (rc < 0) {
+	if (!rc) {
 		dma_unmap_sg(dev, msg->spu.src, sg_nents(msg->spu.src),
 			     DMA_TO_DEVICE);
-		return rc;
+		return -EIO;
 	}
 
 	return 0;

drivers/mailbox/imx-mailbox.c

@@ -904,7 +904,7 @@ static const struct imx_mu_dcfg imx_mu_cfg_imx7ulp = {
 	.xTR	= 0x20,
 	.xRR	= 0x40,
 	.xSR	= {0x60, 0x60, 0x60, 0x60},
-	.xCR	= {0x64, 0x64, 0x64, 0x64},
+	.xCR	= {0x64, 0x64, 0x64, 0x64, 0x64},
 };
 
 static const struct imx_mu_dcfg imx_mu_cfg_imx8ulp = {
@@ -927,7 +927,7 @@ static const struct imx_mu_dcfg imx_mu_cfg_imx8ulp_s4 = {
 	.xTR	= 0x200,
 	.xRR	= 0x280,
 	.xSR	= {0xC, 0x118, 0x124, 0x12C},
-	.xCR	= {0x110, 0x114, 0x120, 0x128},
+	.xCR	= {0x8, 0x110, 0x114, 0x120, 0x128},
 };
 
 static const struct imx_mu_dcfg imx_mu_cfg_imx93_s4 = {
@@ -938,7 +938,7 @@ static const struct imx_mu_dcfg imx_mu_cfg_imx93_s4 = {
 	.xTR	= 0x200,
 	.xRR	= 0x280,
 	.xSR	= {0xC, 0x118, 0x124, 0x12C},
-	.xCR	= {0x110, 0x114, 0x120, 0x128},
+	.xCR	= {0x8, 0x110, 0x114, 0x120, 0x128},
 };
 
 static const struct imx_mu_dcfg imx_mu_cfg_imx8_scu = {
@@ -949,7 +949,7 @@ static const struct imx_mu_dcfg imx_mu_cfg_imx8_scu = {
 	.xTR	= 0x0,
 	.xRR	= 0x10,
 	.xSR	= {0x20, 0x20, 0x20, 0x20},
-	.xCR	= {0x24, 0x24, 0x24, 0x24},
+	.xCR	= {0x24, 0x24, 0x24, 0x24, 0x24},
 };
 
 static const struct imx_mu_dcfg imx_mu_cfg_imx8_seco = {
@@ -960,7 +960,7 @@ static const struct imx_mu_dcfg imx_mu_cfg_imx8_seco = {
 	.xTR	= 0x0,
 	.xRR	= 0x10,
 	.xSR	= {0x20, 0x20, 0x20, 0x20},
-	.xCR	= {0x24, 0x24, 0x24, 0x24},
+	.xCR	= {0x24, 0x24, 0x24, 0x24, 0x24},
 };
 
 static const struct of_device_id imx_mu_dt_ids[] = {

drivers/mailbox/mailbox-mpfs.c

@@ -62,6 +62,7 @@ struct mpfs_mbox {
 	struct mbox_controller controller;
 	struct device *dev;
 	int irq;
+	void __iomem *ctrl_base;
 	void __iomem *mbox_base;
 	void __iomem *int_reg;
 	struct mbox_chan chans[1];
@@ -73,7 +74,7 @@ static bool mpfs_mbox_busy(struct mpfs_mbox *mbox)
 {
 	u32 status;
 
-	status = readl_relaxed(mbox->mbox_base + SERVICES_SR_OFFSET);
+	status = readl_relaxed(mbox->ctrl_base + SERVICES_SR_OFFSET);
 
 	return status & SCB_STATUS_BUSY_MASK;
 }
@@ -99,29 +100,27 @@ static int mpfs_mbox_send_data(struct mbox_chan *chan, void *data)
 
 		for (index = 0; index < (msg->cmd_data_size / 4); index++)
 			writel_relaxed(word_buf[index],
-				       mbox->mbox_base + MAILBOX_REG_OFFSET + index * 0x4);
+				       mbox->mbox_base + msg->mbox_offset + index * 0x4);
 		if (extra_bits) {
 			u8 i;
 			u8 byte_off = ALIGN_DOWN(msg->cmd_data_size, 4);
 			u8 *byte_buf = msg->cmd_data + byte_off;
 
-			val = readl_relaxed(mbox->mbox_base +
+			val = readl_relaxed(mbox->mbox_base + msg->mbox_offset + index * 0x4);
-					    MAILBOX_REG_OFFSET + index * 0x4);
 
 			for (i = 0u; i < extra_bits; i++) {
 				val &= ~(0xffu << (i * 8u));
 				val |= (byte_buf[i] << (i * 8u));
 			}
 
-			writel_relaxed(val,
+			writel_relaxed(val, mbox->mbox_base + msg->mbox_offset + index * 0x4);
-				       mbox->mbox_base + MAILBOX_REG_OFFSET + index * 0x4);
 		}
 	}
 
 	opt_sel = ((msg->mbox_offset << 7u) | (msg->cmd_opcode & 0x7fu));
 	tx_trigger = (opt_sel << SCB_CTRL_POS) & SCB_CTRL_MASK;
 	tx_trigger |= SCB_CTRL_REQ_MASK | SCB_STATUS_NOTIFY_MASK;
-	writel_relaxed(tx_trigger, mbox->mbox_base + SERVICES_CR_OFFSET);
+	writel_relaxed(tx_trigger, mbox->ctrl_base + SERVICES_CR_OFFSET);
 
 	return 0;
 }
@@ -141,7 +140,7 @@ static void mpfs_mbox_rx_data(struct mbox_chan *chan)
 	if (!mpfs_mbox_busy(mbox)) {
 		for (i = 0; i < num_words; i++) {
 			response->resp_msg[i] =
-				readl_relaxed(mbox->mbox_base + MAILBOX_REG_OFFSET
+				readl_relaxed(mbox->mbox_base
 					      + mbox->resp_offset + i * 0x4);
 		}
 	}
@@ -200,14 +199,18 @@ static int mpfs_mbox_probe(struct platform_device *pdev)
 	if (!mbox)
 		return -ENOMEM;
 
-	mbox->mbox_base = devm_platform_get_and_ioremap_resource(pdev, 0, &regs);
+	mbox->ctrl_base = devm_platform_get_and_ioremap_resource(pdev, 0, &regs);
-	if (IS_ERR(mbox->mbox_base))
+	if (IS_ERR(mbox->ctrl_base))
-		return PTR_ERR(mbox->mbox_base);
+		return PTR_ERR(mbox->ctrl_base);
 
 	mbox->int_reg = devm_platform_get_and_ioremap_resource(pdev, 1, &regs);
 	if (IS_ERR(mbox->int_reg))
 		return PTR_ERR(mbox->int_reg);
 
+	mbox->mbox_base = devm_platform_get_and_ioremap_resource(pdev, 2, &regs);
+	if (IS_ERR(mbox->mbox_base)) // account for the old dt-binding w/ 2 regs
+		mbox->mbox_base = mbox->ctrl_base + MAILBOX_REG_OFFSET;
+
 	mbox->irq = platform_get_irq(pdev, 0);
 	if (mbox->irq < 0)
 		return mbox->irq;

drivers/mailbox/pcc.c

@@ -676,7 +676,7 @@ static int pcc_mbox_probe(struct platform_device *pdev)
 
 		if (pcct_entry->type == ACPI_PCCT_TYPE_EXT_PCC_SLAVE_SUBSPACE &&
 		    !pcc_mbox_ctrl->txdone_irq) {
-			pr_err("Plaform Interrupt flag must be set to 1");
+			pr_err("Platform Interrupt flag must be set to 1");
 			rc = -EINVAL;
 			goto err;
 		}

drivers/mailbox/qcom-apcs-ipc-mailbox.c

@@ -142,7 +142,7 @@ static int qcom_apcs_ipc_remove(struct platform_device *pdev)
 /* .data is the offset of the ipc register within the global block */
 static const struct of_device_id qcom_apcs_ipc_of_match[] = {
 	{ .compatible = "qcom,ipq6018-apcs-apps-global", .data = &ipq6018_apcs_data },
-	{ .compatible = "qcom,ipq8074-apcs-apps-global", .data = &msm8994_apcs_data },
+	{ .compatible = "qcom,ipq8074-apcs-apps-global", .data = &ipq6018_apcs_data },
 	{ .compatible = "qcom,msm8916-apcs-kpss-global", .data = &msm8916_apcs_data },
 	{ .compatible = "qcom,msm8939-apcs-kpss-global", .data = &msm8916_apcs_data },
 	{ .compatible = "qcom,msm8953-apcs-kpss-global", .data = &msm8994_apcs_data },

drivers/mailbox/qcom-ipcc.c

@@ -308,7 +308,8 @@ static int qcom_ipcc_probe(struct platform_device *pdev)
 		goto err_mbox;
 
 	ret = devm_request_irq(&pdev->dev, ipcc->irq, qcom_ipcc_irq_fn,
-			       IRQF_TRIGGER_HIGH | IRQF_NO_SUSPEND, name, ipcc);
+			       IRQF_TRIGGER_HIGH | IRQF_NO_SUSPEND |
+			       IRQF_NO_THREAD, name, ipcc);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "Failed to register the irq: %d\n", ret);
 		goto err_req_irq;