Merge tag 'i2c-for-6.4-rc1-part2' of git://git.kernel.org/pub/scm/lin…

…ux/kernel/git/wsa/linux

Pull more i2c updates from Wolfram Sang:
 "Some more driver bugfixes and a DT binding conversion"

* tag 'i2c-for-6.4-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  dt-bindings: i2c: brcm,kona-i2c: convert to YAML
  i2c: gxp: fix build failure without CONFIG_I2C_SLAVE
  i2c: imx-lpi2c: avoid taking clk_prepare mutex in PM callbacks
  i2c: omap: Fix standard mode false ACK readings
  i2c: tegra: Fix PEC support for SMBUS block read

Documentation/devicetree/bindings/i2c/brcm,kona-i2c.yaml

@@ -0,0 +1,59 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/brcm,kona-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom Kona family I2C controller
+
+maintainers:
+  - Florian Fainelli <[email protected]>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - brcm,bcm11351-i2c
+          - brcm,bcm21664-i2c
+          - brcm,bcm23550-i2c
+      - const: brcm,kona-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-frequency:
+    enum: [ 100000, 400000, 1000000, 3400000 ]
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-frequency
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c@3e016000 {
+        compatible = "brcm,bcm11351-i2c", "brcm,kona-i2c";
+        reg = <0x3e016000 0x80>;
+        interrupts = <GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&bsc1_clk>;
+        clock-frequency = <400000>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+    };
+...

drivers/i2c/busses/i2c-gxp.c

@@ -353,7 +353,6 @@ static void gxp_i2c_chk_data_ack(struct gxp_i2c_drvdata *drvdata)
 	writew(value, drvdata->base + GXP_I2CMCMD);
 }
 
-#if IS_ENABLED(CONFIG_I2C_SLAVE)
 static bool gxp_i2c_slave_irq_handler(struct gxp_i2c_drvdata *drvdata)
 {
 	u8 value;
@@ -437,7 +436,6 @@ static bool gxp_i2c_slave_irq_handler(struct gxp_i2c_drvdata *drvdata)
 
 	return true;
 }
-#endif
 
 static irqreturn_t gxp_i2c_irq_handler(int irq, void *_drvdata)
 {

drivers/i2c/busses/i2c-imx-lpi2c.c

@@ -639,7 +639,7 @@ static int __maybe_unused lpi2c_runtime_suspend(struct device *dev)
 {
 	struct lpi2c_imx_struct *lpi2c_imx = dev_get_drvdata(dev);
 
-	clk_bulk_disable_unprepare(lpi2c_imx->num_clks, lpi2c_imx->clks);
+	clk_bulk_disable(lpi2c_imx->num_clks, lpi2c_imx->clks);
 	pinctrl_pm_select_sleep_state(dev);
 
 	return 0;
@@ -651,7 +651,7 @@ static int __maybe_unused lpi2c_runtime_resume(struct device *dev)
 	int ret;
 
 	pinctrl_pm_select_default_state(dev);
-	ret = clk_bulk_prepare_enable(lpi2c_imx->num_clks, lpi2c_imx->clks);
+	ret = clk_bulk_enable(lpi2c_imx->num_clks, lpi2c_imx->clks);
 	if (ret) {
 		dev_err(dev, "failed to enable I2C clock, ret=%d\n", ret);
 		return ret;

drivers/i2c/busses/i2c-omap.c

@@ -1058,7 +1058,7 @@ omap_i2c_isr(int irq, void *dev_id)
 	u16 stat;
 
 	stat = omap_i2c_read_reg(omap, OMAP_I2C_STAT_REG);
-	mask = omap_i2c_read_reg(omap, OMAP_I2C_IE_REG);
+	mask = omap_i2c_read_reg(omap, OMAP_I2C_IE_REG) & ~OMAP_I2C_STAT_NACK;
 
 	if (stat & mask)
 		ret = IRQ_WAKE_THREAD;

drivers/i2c/busses/i2c-tegra.c

@@ -242,9 +242,10 @@ struct tegra_i2c_hw_feature {
  * @is_dvc: identifies the DVC I2C controller, has a different register layout
  * @is_vi: identifies the VI I2C controller, has a different register layout
  * @msg_complete: transfer completion notifier
+ * @msg_buf_remaining: size of unsent data in the message buffer
+ * @msg_len: length of message in current transfer
  * @msg_err: error code for completed message
  * @msg_buf: pointer to current message data
- * @msg_buf_remaining: size of unsent data in the message buffer
  * @msg_read: indicates that the transfer is a read access
  * @timings: i2c timings information like bus frequency
  * @multimaster_mode: indicates that I2C controller is in multi-master mode
@@ -277,6 +278,7 @@ struct tegra_i2c_dev {
 
 	struct completion msg_complete;
 	size_t msg_buf_remaining;
+	unsigned int msg_len;
 	int msg_err;
 	u8 *msg_buf;
 
@@ -1169,7 +1171,7 @@ static void tegra_i2c_push_packet_header(struct tegra_i2c_dev *i2c_dev,
 	else
 		i2c_writel(i2c_dev, packet_header, I2C_TX_FIFO);
 
-	packet_header = msg->len - 1;
+	packet_header = i2c_dev->msg_len - 1;
 
 	if (i2c_dev->dma_mode && !i2c_dev->msg_read)
 		*dma_buf++ = packet_header;
@@ -1242,20 +1244,32 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
 		return err;
 
 	i2c_dev->msg_buf = msg->buf;
+	i2c_dev->msg_len = msg->len;
 
-	/* The condition true implies smbus block read and len is already read */
-	if (msg->flags & I2C_M_RECV_LEN && end_state != MSG_END_CONTINUE)
-		i2c_dev->msg_buf = msg->buf + 1;
-
-	i2c_dev->msg_buf_remaining = msg->len;
 	i2c_dev->msg_err = I2C_ERR_NONE;
 	i2c_dev->msg_read = !!(msg->flags & I2C_M_RD);
 	reinit_completion(&i2c_dev->msg_complete);
 
+	/*
+	 * For SMBUS block read command, read only 1 byte in the first transfer.
+	 * Adjust that 1 byte for the next transfer in the msg buffer and msg
+	 * length.
+	 */
+	if (msg->flags & I2C_M_RECV_LEN) {
+		if (end_state == MSG_END_CONTINUE) {
+			i2c_dev->msg_len = 1;
+		} else {
+			i2c_dev->msg_buf += 1;
+			i2c_dev->msg_len -= 1;
+		}
+	}
+
+	i2c_dev->msg_buf_remaining = i2c_dev->msg_len;
+
 	if (i2c_dev->msg_read)
-		xfer_size = msg->len;
+		xfer_size = i2c_dev->msg_len;
 	else
-		xfer_size = msg->len + I2C_PACKET_HEADER_SIZE;
+		xfer_size = i2c_dev->msg_len + I2C_PACKET_HEADER_SIZE;
 
 	xfer_size = ALIGN(xfer_size, BYTES_PER_FIFO_WORD);
 
@@ -1295,7 +1309,7 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
 	if (!i2c_dev->msg_read) {
 		if (i2c_dev->dma_mode) {
 			memcpy(i2c_dev->dma_buf + I2C_PACKET_HEADER_SIZE,
-			       msg->buf, msg->len);
+			       msg->buf, i2c_dev->msg_len);
 
 			dma_sync_single_for_device(i2c_dev->dma_dev,
 						   i2c_dev->dma_phys,
@@ -1352,7 +1366,7 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
 						i2c_dev->dma_phys,
 						xfer_size, DMA_FROM_DEVICE);
 
-			memcpy(i2c_dev->msg_buf, i2c_dev->dma_buf, msg->len);
+			memcpy(i2c_dev->msg_buf, i2c_dev->dma_buf, i2c_dev->msg_len);
 		}
 	}
 
@@ -1408,8 +1422,8 @@ static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
 			ret = tegra_i2c_xfer_msg(i2c_dev, &msgs[i], MSG_END_CONTINUE);
 			if (ret)
 				break;
-			/* Set the read byte as msg len */
-			msgs[i].len = msgs[i].buf[0];
+			/* Set the msg length from first byte */
+			msgs[i].len += msgs[i].buf[0];
 			dev_dbg(i2c_dev->dev, "reading %d bytes\n", msgs[i].len);
 		}
 		ret = tegra_i2c_xfer_msg(i2c_dev, &msgs[i], end_type);

include/linux/i2c.h

@@ -385,7 +385,6 @@ static inline void i2c_set_clientdata(struct i2c_client *client, void *data)
 
 /* I2C slave support */
 
-#if IS_ENABLED(CONFIG_I2C_SLAVE)
 enum i2c_slave_event {
 	I2C_SLAVE_READ_REQUESTED,
 	I2C_SLAVE_WRITE_REQUESTED,
@@ -396,9 +395,10 @@ enum i2c_slave_event {
 
 int i2c_slave_register(struct i2c_client *client, i2c_slave_cb_t slave_cb);
 int i2c_slave_unregister(struct i2c_client *client);
-bool i2c_detect_slave_mode(struct device *dev);
 int i2c_slave_event(struct i2c_client *client,
 		    enum i2c_slave_event event, u8 *val);
+#if IS_ENABLED(CONFIG_I2C_SLAVE)
+bool i2c_detect_slave_mode(struct device *dev);
 #else
 static inline bool i2c_detect_slave_mode(struct device *dev) { return false; }
 #endif