Merge branch 'i2c/for-5.4' of git://git.kernel.org/pub/scm/linux/kern…

…el/git/wsa/linux

Pull i2c updates from Wolfram Sang:

 - new driver for ICY, an Amiga Zorro card :)

 - axxia driver gained slave mode support, NXP driver gained ACPI

 - the slave EEPROM backend gained 16 bit address support

 - and lots of regular driver updates and reworks

* 'i2c/for-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (52 commits)
  i2c: tegra: Move suspend handling to NOIRQ phase
  i2c: imx: ACPI support for NXP i2c controller
  i2c: uniphier(-f): remove all dev_dbg()
  i2c: uniphier(-f): use devm_platform_ioremap_resource()
  i2c: slave-eeprom: Add comment about address handling
  i2c: exynos5: Remove IRQF_ONESHOT
  i2c: stm32f7: Make structure stm32f7_i2c_algo constant
  i2c: cht-wc: drop check because i2c_unregister_device() is NULL safe
  i2c-eeprom_slave: Add support for more eeprom models
  i2c: fsi: Add of_put_node() before break
  i2c: synquacer: Make synquacer_i2c_ops constant
  i2c: hix5hd2: Remove IRQF_ONESHOT
  i2c: i801: Use iTCO version 6 in Cannon Lake PCH and beyond
  watchdog: iTCO: Add support for Cannon Lake PCH iTCO
  i2c: iproc: Make bcm_iproc_i2c_quirks constant
  i2c: iproc: Add full name of devicetree node to adapter name
  i2c: piix4: Add ACPI support
  i2c: piix4: Fix probing of reserved ports on AMD Family 16h Model 30h
  i2c: ocores: use request_any_context_irq() to register IRQ handler
  i2c: designware: Fix optional reset error handling
  ...

Documentation/devicetree/bindings/i2c/brcm,bcm2835-i2c.txt

@@ -1,7 +1,9 @@
 Broadcom BCM2835 I2C controller
 
 Required properties:
-- compatible : Should be "brcm,bcm2835-i2c".
+- compatible : Should be one of:
+	"brcm,bcm2711-i2c"
+	"brcm,bcm2835-i2c"
 - reg: Should contain register location and length.
 - interrupts: Should contain interrupt.
 - clocks : The clock feeding the I2C controller.

MAINTAINERS

@@ -7865,6 +7865,12 @@ S:	Maintained
 F:	drivers/mfd/lpc_ich.c
 F:	drivers/gpio/gpio-ich.c
 
+ICY I2C DRIVER
+M:	Max Staudt <[email protected]>
+L:	[email protected]
+S:	Maintained
+F:	drivers/i2c/busses/i2c-icy.c
+
 IDE SUBSYSTEM
 M:	"David S. Miller" <[email protected]>
 L:	[email protected]
@@ -13791,7 +13797,7 @@ F:	drivers/clk/renesas/
 RENESAS EMEV2 I2C DRIVER
 M:	Wolfram Sang <[email protected]>
 S:	Supported
-F:	Documentation/devicetree/bindings/i2c/i2c-emev2.txt
+F:	Documentation/devicetree/bindings/i2c/renesas,iic-emev2.txt
 F:	drivers/i2c/busses/i2c-emev2.c
 
 RENESAS ETHERNET DRIVERS
@@ -13813,15 +13819,15 @@ F:	drivers/iio/adc/rcar-gyroadc.c
 RENESAS R-CAR I2C DRIVERS
 M:	Wolfram Sang <[email protected]>
 S:	Supported
-F:	Documentation/devicetree/bindings/i2c/i2c-rcar.txt
-F:	Documentation/devicetree/bindings/i2c/i2c-sh_mobile.txt
+F:	Documentation/devicetree/bindings/i2c/renesas,i2c.txt
+F:	Documentation/devicetree/bindings/i2c/renesas,iic.txt
 F:	drivers/i2c/busses/i2c-rcar.c
 F:	drivers/i2c/busses/i2c-sh_mobile.c
 
 RENESAS RIIC DRIVER
 M:	Chris Brandt <[email protected]>
 S:	Supported
-F:	Documentation/devicetree/bindings/i2c/i2c-riic.txt
+F:	Documentation/devicetree/bindings/i2c/renesas,riic.txt
 F:	drivers/i2c/busses/i2c-riic.c
 
 RENESAS USB PHY DRIVER

drivers/acpi/acpi_apd.c

@@ -160,11 +160,17 @@ static const struct apd_device_desc hip08_i2c_desc = {
 	.setup = acpi_apd_setup,
 	.fixed_clk_rate = 250000000,
 };
+
 static const struct apd_device_desc thunderx2_i2c_desc = {
 	.setup = acpi_apd_setup,
 	.fixed_clk_rate = 125000000,
 };
 
+static const struct apd_device_desc nxp_i2c_desc = {
+	.setup = acpi_apd_setup,
+	.fixed_clk_rate = 350000000,
+};
+
 static const struct apd_device_desc hip08_spi_desc = {
 	.setup = acpi_apd_setup,
 	.fixed_clk_rate = 250000000,
@@ -238,6 +244,7 @@ static const struct acpi_device_id acpi_apd_device_ids[] = {
 	{ "HISI02A1", APD_ADDR(hip07_i2c_desc) },
 	{ "HISI02A2", APD_ADDR(hip08_i2c_desc) },
 	{ "HISI0173", APD_ADDR(hip08_spi_desc) },
+	{ "NXP0001", APD_ADDR(nxp_i2c_desc) },
 #endif
 	{ }
 };

drivers/gpu/drm/bridge/adv7511/adv7511_drv.c

@@ -978,10 +978,10 @@ static int adv7511_init_cec_regmap(struct adv7511 *adv)
 {
 	int ret;
 
-	adv->i2c_cec = i2c_new_secondary_device(adv->i2c_main, "cec",
+	adv->i2c_cec = i2c_new_ancillary_device(adv->i2c_main, "cec",
 						ADV7511_CEC_I2C_ADDR_DEFAULT);
-	if (!adv->i2c_cec)
-		return -EINVAL;
+	if (IS_ERR(adv->i2c_cec))
+		return PTR_ERR(adv->i2c_cec);
 	i2c_set_clientdata(adv->i2c_cec, adv);
 
 	adv->regmap_cec = devm_regmap_init_i2c(adv->i2c_cec,
@@ -1162,20 +1162,20 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 
 	adv7511_packet_disable(adv7511, 0xffff);
 
-	adv7511->i2c_edid = i2c_new_secondary_device(i2c, "edid",
+	adv7511->i2c_edid = i2c_new_ancillary_device(i2c, "edid",
 					ADV7511_EDID_I2C_ADDR_DEFAULT);
-	if (!adv7511->i2c_edid) {
-		ret = -EINVAL;
+	if (IS_ERR(adv7511->i2c_edid)) {
+		ret = PTR_ERR(adv7511->i2c_edid);
 		goto uninit_regulators;
 	}
 
 	regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR,
 		     adv7511->i2c_edid->addr << 1);
 
-	adv7511->i2c_packet = i2c_new_secondary_device(i2c, "packet",
+	adv7511->i2c_packet = i2c_new_ancillary_device(i2c, "packet",
 					ADV7511_PACKET_I2C_ADDR_DEFAULT);
-	if (!adv7511->i2c_packet) {
-		ret = -EINVAL;
+	if (IS_ERR(adv7511->i2c_packet)) {
+		ret = PTR_ERR(adv7511->i2c_packet);
 		goto err_i2c_unregister_edid;
 	}
 

drivers/i2c/busses/Kconfig

@@ -429,6 +429,7 @@ config I2C_AXXIA
 	tristate "Axxia I2C controller"
 	depends on ARCH_AXXIA || COMPILE_TEST
 	default ARCH_AXXIA
+	select I2C_SLAVE
 	help
 	  Say yes if you want to support the I2C bus on Axxia platforms.
 
@@ -977,7 +978,7 @@ config I2C_SIRF
 	  will be called i2c-sirf.
 
 config I2C_SPRD
-	bool "Spreadtrum I2C interface"
+	tristate "Spreadtrum I2C interface"
 	depends on I2C=y && ARCH_SPRD
 	help
 	  If you say yes to this option, support will be included for the
@@ -1309,6 +1310,20 @@ config I2C_ELEKTOR
 	  This support is also available as a module.  If so, the module
 	  will be called i2c-elektor.
 
+config I2C_ICY
+	tristate "ICY Zorro card"
+	depends on ZORRO
+	select I2C_ALGOPCF
+	help
+	  This supports the PCF8584 Zorro bus I2C adapter, known as ICY.
+	  Say Y if you own such an adapter.
+
+	  This support is also available as a module.  If so, the module
+	  will be called i2c-icy.
+
+	  If you have a 2019 edition board with an LTC2990 sensor at address
+	  0x4c, loading the module 'ltc2990' is sufficient to enable it.
+
 config I2C_MLXCPLD
 	tristate "Mellanox I2C driver"
 	depends on X86_64

drivers/i2c/busses/Makefile

@@ -140,6 +140,7 @@ obj-$(CONFIG_I2C_BCM_KONA)	+= i2c-bcm-kona.o
 obj-$(CONFIG_I2C_BRCMSTB)	+= i2c-brcmstb.o
 obj-$(CONFIG_I2C_CROS_EC_TUNNEL)	+= i2c-cros-ec-tunnel.o
 obj-$(CONFIG_I2C_ELEKTOR)	+= i2c-elektor.o
+obj-$(CONFIG_I2C_ICY)		+= i2c-icy.o
 obj-$(CONFIG_I2C_MLXCPLD)	+= i2c-mlxcpld.o
 obj-$(CONFIG_I2C_OPAL)		+= i2c-opal.o
 obj-$(CONFIG_I2C_PCA_ISA)	+= i2c-pca-isa.o

drivers/i2c/busses/i2c-axxia.c

@@ -77,6 +77,40 @@
 				 MST_STATUS_IP)
 #define MST_TX_BYTES_XFRD	0x50
 #define MST_RX_BYTES_XFRD	0x54
+#define SLV_ADDR_DEC_CTL	0x58
+#define   SLV_ADDR_DEC_GCE	BIT(0)  /* ACK to General Call Address from own master (loopback) */
+#define   SLV_ADDR_DEC_OGCE	BIT(1)  /* ACK to General Call Address from external masters */
+#define   SLV_ADDR_DEC_SA1E	BIT(2)  /* ACK to addr_1 enabled */
+#define   SLV_ADDR_DEC_SA1M	BIT(3)  /* 10-bit addressing for addr_1 enabled */
+#define   SLV_ADDR_DEC_SA2E	BIT(4)  /* ACK to addr_2 enabled */
+#define   SLV_ADDR_DEC_SA2M	BIT(5)  /* 10-bit addressing for addr_2 enabled */
+#define SLV_ADDR_1		0x5c
+#define SLV_ADDR_2		0x60
+#define SLV_RX_CTL		0x64
+#define   SLV_RX_ACSA1		BIT(0)  /* Generate ACK for writes to addr_1 */
+#define   SLV_RX_ACSA2		BIT(1)  /* Generate ACK for writes to addr_2 */
+#define   SLV_RX_ACGCA		BIT(2)  /* ACK data phase transfers to General Call Address */
+#define SLV_DATA		0x68
+#define SLV_RX_FIFO		0x6c
+#define   SLV_FIFO_DV1		BIT(0)  /* Data Valid for addr_1 */
+#define   SLV_FIFO_DV2		BIT(1)  /* Data Valid for addr_2 */
+#define   SLV_FIFO_AS		BIT(2)  /* (N)ACK Sent */
+#define   SLV_FIFO_TNAK		BIT(3)  /* Timeout NACK */
+#define   SLV_FIFO_STRC		BIT(4)  /* First byte after start condition received */
+#define   SLV_FIFO_RSC		BIT(5)  /* Repeated Start Condition */
+#define   SLV_FIFO_STPC		BIT(6)  /* Stop Condition */
+#define   SLV_FIFO_DV		(SLV_FIFO_DV1 | SLV_FIFO_DV2)
+#define SLV_INT_ENABLE		0x70
+#define SLV_INT_STATUS		0x74
+#define   SLV_STATUS_RFH	BIT(0)  /* FIFO service */
+#define   SLV_STATUS_WTC	BIT(1)  /* Write transfer complete */
+#define   SLV_STATUS_SRS1	BIT(2)  /* Slave read from addr 1 */
+#define   SLV_STATUS_SRRS1	BIT(3)  /* Repeated start from addr 1 */
+#define   SLV_STATUS_SRND1	BIT(4)  /* Read request not following start condition */
+#define   SLV_STATUS_SRC1	BIT(5)  /* Read canceled */
+#define   SLV_STATUS_SRAT1	BIT(6)  /* Slave Read timed out */
+#define   SLV_STATUS_SRDRE1	BIT(7)  /* Data written after timed out */
+#define SLV_READ_DUMMY		0x78
 #define SCL_HIGH_PERIOD		0x80
 #define SCL_LOW_PERIOD		0x84
 #define SPIKE_FLTR_LEN		0x88
@@ -111,6 +145,8 @@ struct axxia_i2c_dev {
 	struct clk *i2c_clk;
 	u32 bus_clk_rate;
 	bool last;
+	struct i2c_client *slave;
+	int irq;
 };
 
 static void i2c_int_disable(struct axxia_i2c_dev *idev, u32 mask)
@@ -276,13 +312,65 @@ static int axxia_i2c_fill_tx_fifo(struct axxia_i2c_dev *idev)
 	return ret;
 }
 
+static void axxia_i2c_slv_fifo_event(struct axxia_i2c_dev *idev)
+{
+	u32 fifo_status = readl(idev->base + SLV_RX_FIFO);
+	u8 val;
+
+	dev_dbg(idev->dev, "slave irq fifo_status=0x%x\n", fifo_status);
+
+	if (fifo_status & SLV_FIFO_DV1) {
+		if (fifo_status & SLV_FIFO_STRC)
+			i2c_slave_event(idev->slave,
+					I2C_SLAVE_WRITE_REQUESTED, &val);
+
+		val = readl(idev->base + SLV_DATA);
+		i2c_slave_event(idev->slave, I2C_SLAVE_WRITE_RECEIVED, &val);
+	}
+	if (fifo_status & SLV_FIFO_STPC) {
+		readl(idev->base + SLV_DATA); /* dummy read */
+		i2c_slave_event(idev->slave, I2C_SLAVE_STOP, &val);
+	}
+	if (fifo_status & SLV_FIFO_RSC)
+		readl(idev->base + SLV_DATA); /* dummy read */
+}
+
+static irqreturn_t axxia_i2c_slv_isr(struct axxia_i2c_dev *idev)
+{
+	u32 status = readl(idev->base + SLV_INT_STATUS);
+	u8 val;
+
+	dev_dbg(idev->dev, "slave irq status=0x%x\n", status);
+
+	if (status & SLV_STATUS_RFH)
+		axxia_i2c_slv_fifo_event(idev);
+	if (status & SLV_STATUS_SRS1) {
+		i2c_slave_event(idev->slave, I2C_SLAVE_READ_REQUESTED, &val);
+		writel(val, idev->base + SLV_DATA);
+	}
+	if (status & SLV_STATUS_SRND1) {
+		i2c_slave_event(idev->slave, I2C_SLAVE_READ_PROCESSED, &val);
+		writel(val, idev->base + SLV_DATA);
+	}
+	if (status & SLV_STATUS_SRC1)
+		i2c_slave_event(idev->slave, I2C_SLAVE_STOP, &val);
+
+	writel(INT_SLV, idev->base + INTERRUPT_STATUS);
+	return IRQ_HANDLED;
+}
+
 static irqreturn_t axxia_i2c_isr(int irq, void *_dev)
 {
 	struct axxia_i2c_dev *idev = _dev;
+	irqreturn_t ret = IRQ_NONE;
 	u32 status;
 
-	if (!(readl(idev->base + INTERRUPT_STATUS) & INT_MST))
-		return IRQ_NONE;
+	status = readl(idev->base + INTERRUPT_STATUS);
+
+	if (status & INT_SLV)
+		ret = axxia_i2c_slv_isr(idev);
+	if (!(status & INT_MST))
+		return ret;
 
 	/* Read interrupt status bits */
 	status = readl(idev->base + MST_INT_STATUS);
@@ -583,9 +671,58 @@ static u32 axxia_i2c_func(struct i2c_adapter *adap)
 	return caps;
 }
 
+static int axxia_i2c_reg_slave(struct i2c_client *slave)
+{
+	struct axxia_i2c_dev *idev = i2c_get_adapdata(slave->adapter);
+	u32 slv_int_mask = SLV_STATUS_RFH;
+	u32 dec_ctl;
+
+	if (idev->slave)
+		return -EBUSY;
+
+	idev->slave = slave;
+
+	/* Enable slave mode as well */
+	writel(GLOBAL_MST_EN | GLOBAL_SLV_EN, idev->base + GLOBAL_CONTROL);
+	writel(INT_MST | INT_SLV, idev->base + INTERRUPT_ENABLE);
+
+	/* Set slave address */
+	dec_ctl = SLV_ADDR_DEC_SA1E;
+	if (slave->flags & I2C_CLIENT_TEN)
+		dec_ctl |= SLV_ADDR_DEC_SA1M;
+
+	writel(SLV_RX_ACSA1, idev->base + SLV_RX_CTL);
+	writel(dec_ctl, idev->base + SLV_ADDR_DEC_CTL);
+	writel(slave->addr, idev->base + SLV_ADDR_1);
+
+	/* Enable interrupts */
+	slv_int_mask |= SLV_STATUS_SRS1 | SLV_STATUS_SRRS1 | SLV_STATUS_SRND1;
+	slv_int_mask |= SLV_STATUS_SRC1;
+	writel(slv_int_mask, idev->base + SLV_INT_ENABLE);
+
+	return 0;
+}
+
+static int axxia_i2c_unreg_slave(struct i2c_client *slave)
+{
+	struct axxia_i2c_dev *idev = i2c_get_adapdata(slave->adapter);
+
+	/* Disable slave mode */
+	writel(GLOBAL_MST_EN, idev->base + GLOBAL_CONTROL);
+	writel(INT_MST, idev->base + INTERRUPT_ENABLE);
+
+	synchronize_irq(idev->irq);
+
+	idev->slave = NULL;
+
+	return 0;
+}
+
 static const struct i2c_algorithm axxia_i2c_algo = {
 	.master_xfer = axxia_i2c_xfer,
 	.functionality = axxia_i2c_func,
+	.reg_slave = axxia_i2c_reg_slave,
+	.unreg_slave = axxia_i2c_unreg_slave,
 };
 
 static const struct i2c_adapter_quirks axxia_i2c_quirks = {
@@ -599,7 +736,6 @@ static int axxia_i2c_probe(struct platform_device *pdev)
 	struct axxia_i2c_dev *idev = NULL;
 	struct resource *res;
 	void __iomem *base;
-	int irq;
 	int ret = 0;
 
 	idev = devm_kzalloc(&pdev->dev, sizeof(*idev), GFP_KERNEL);
@@ -611,10 +747,10 @@ static int axxia_i2c_probe(struct platform_device *pdev)
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
+	idev->irq = platform_get_irq(pdev, 0);
+	if (idev->irq < 0) {
 		dev_err(&pdev->dev, "missing interrupt resource\n");
-		return irq;
+		return idev->irq;
 	}
 
 	idev->i2c_clk = devm_clk_get(&pdev->dev, "i2c");
@@ -643,10 +779,10 @@ static int axxia_i2c_probe(struct platform_device *pdev)
 		goto error_disable_clk;
 	}
 
-	ret = devm_request_irq(&pdev->dev, irq, axxia_i2c_isr, 0,
+	ret = devm_request_irq(&pdev->dev, idev->irq, axxia_i2c_isr, 0,
 			       pdev->name, idev);
 	if (ret) {
-		dev_err(&pdev->dev, "failed to claim IRQ%d\n", irq);
+		dev_err(&pdev->dev, "failed to claim IRQ%d\n", idev->irq);
 		goto error_disable_clk;
 	}
 

drivers/i2c/busses/i2c-bcm-iproc.c

@@ -808,7 +808,7 @@ static struct i2c_algorithm bcm_iproc_algo = {
 	.unreg_slave = bcm_iproc_i2c_unreg_slave,
 };
 
-static struct i2c_adapter_quirks bcm_iproc_i2c_quirks = {
+static const struct i2c_adapter_quirks bcm_iproc_i2c_quirks = {
 	.max_read_len = M_RX_MAX_READ_LEN,
 };
 
@@ -922,7 +922,9 @@ static int bcm_iproc_i2c_probe(struct platform_device *pdev)
 
 	adap = &iproc_i2c->adapter;
 	i2c_set_adapdata(adap, iproc_i2c);
-	strlcpy(adap->name, "Broadcom iProc I2C adapter", sizeof(adap->name));
+	snprintf(adap->name, sizeof(adap->name),
+		"Broadcom iProc (%s)",
+		of_node_full_name(iproc_i2c->device->of_node));
 	adap->algo = &bcm_iproc_algo;
 	adap->quirks = &bcm_iproc_i2c_quirks;
 	adap->dev.parent = &pdev->dev;