Re: testers wanted: isp1301_omap conversion to new-style i2c driver

[Jean Delvare <khali@linux-fr.org>]

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On Tue, 17 Jun 2008 20:43:00 +0200, Jean Delvare wrote:
> Hi all,
> 
> I have converted the isp1301_omap driver to a new-style i2c driver. The
> problem is that I don't have an OMAP system nor even an ARM compiler,
> so I cannot test my work at all. So, I would appreciate if someone with
> access to an OMAP system could test if the isp1301_omap driver still
> builds and works fine after applying the two attached patches.

Still no testers for these patches? These will have to go upstream at
some point, as legacy i2c client support will be deprecated and
ultimately dropped. The earlier the better. I would really prefer these
patches to get some testing before I push them upstream, but if I can't
get any feedback within a reasonable time frame, I guess I will have to
just push them anyway and hope nothing breaks.

Thanks,
-- 
Jean Delvare

[-- Attachment #2: i2c-isp1301_omap-convert-to-new-style-part-1.patch --]
[-- Type: text/x-patch, Size: 7120 bytes --]

From: Felipe Balbi <me@felipebalbi.com>
Subject: i2c/isp1301_omap: Convert to a new-style i2c driver, part 1

Based on David Brownell's patch for tps65010, this patch
starts converting isp1301_omap.c to new-style i2c driver.

Signed-off-by: Felipe Balbi <me@felipebalbi.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
---
This needs testing! Both build-time and run-time.

 drivers/i2c/chips/isp1301_omap.c |   59 +++++++++++++++++++-------------------
 1 file changed, 30 insertions(+), 29 deletions(-)

--- linux-2.6.27-rc0.orig/drivers/i2c/chips/isp1301_omap.c	2008-07-15 22:05:08.000000000 +0200
+++ linux-2.6.27-rc0/drivers/i2c/chips/isp1301_omap.c	2008-07-15 23:15:34.000000000 +0200
@@ -49,7 +49,8 @@ MODULE_LICENSE("GPL");
 
 struct isp1301 {
 	struct otg_transceiver	otg;
-	struct i2c_client	client;
+	struct i2c_client	*client;
+	struct i2c_client	c;
 	void			(*i2c_release)(struct device *dev);
 
 	int			irq;
@@ -153,25 +154,25 @@ static struct i2c_driver isp1301_driver;
 static inline u8
 isp1301_get_u8(struct isp1301 *isp, u8 reg)
 {
-	return i2c_smbus_read_byte_data(&isp->client, reg + 0);
+	return i2c_smbus_read_byte_data(isp->client, reg + 0);
 }
 
 static inline int
 isp1301_get_u16(struct isp1301 *isp, u8 reg)
 {
-	return i2c_smbus_read_word_data(&isp->client, reg);
+	return i2c_smbus_read_word_data(isp->client, reg);
 }
 
 static inline int
 isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits)
 {
-	return i2c_smbus_write_byte_data(&isp->client, reg + 0, bits);
+	return i2c_smbus_write_byte_data(isp->client, reg + 0, bits);
 }
 
 static inline int
 isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits)
 {
-	return i2c_smbus_write_byte_data(&isp->client, reg + 1, bits);
+	return i2c_smbus_write_byte_data(isp->client, reg + 1, bits);
 }
 
 /*-------------------------------------------------------------------------*/
@@ -349,10 +350,10 @@ isp1301_defer_work(struct isp1301 *isp, 
 	int status;
 
 	if (isp && !test_and_set_bit(work, &isp->todo)) {
-		(void) get_device(&isp->client.dev);
+		(void) get_device(&isp->client->dev);
 		status = schedule_work(&isp->work);
 		if (!status && !isp->working)
-			dev_vdbg(&isp->client.dev,
+			dev_vdbg(&isp->client->dev,
 				"work item %d may be lost\n", work);
 	}
 }
@@ -1135,7 +1136,7 @@ isp1301_work(struct work_struct *work)
 		/* transfer state from otg engine to isp1301 */
 		if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) {
 			otg_update_isp(isp);
-			put_device(&isp->client.dev);
+			put_device(&isp->client->dev);
 		}
 #endif
 		/* transfer state from isp1301 to otg engine */
@@ -1143,7 +1144,7 @@ isp1301_work(struct work_struct *work)
 			u8		stat = isp1301_clear_latch(isp);
 
 			isp_update_otg(isp, stat);
-			put_device(&isp->client.dev);
+			put_device(&isp->client->dev);
 		}
 
 		if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) {
@@ -1178,7 +1179,7 @@ isp1301_work(struct work_struct *work)
 			}
 			host_resume(isp);
 			// mdelay(10);
-			put_device(&isp->client.dev);
+			put_device(&isp->client->dev);
 		}
 
 		if (test_and_clear_bit(WORK_TIMER, &isp->todo)) {
@@ -1187,15 +1188,15 @@ isp1301_work(struct work_struct *work)
 			if (!stop)
 				mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
 #endif
-			put_device(&isp->client.dev);
+			put_device(&isp->client->dev);
 		}
 
 		if (isp->todo)
-			dev_vdbg(&isp->client.dev,
+			dev_vdbg(&isp->client->dev,
 				"work done, todo = 0x%lx\n",
 				isp->todo);
 		if (stop) {
-			dev_dbg(&isp->client.dev, "stop\n");
+			dev_dbg(&isp->client->dev, "stop\n");
 			break;
 		}
 	} while (isp->todo);
@@ -1219,7 +1220,7 @@ static void isp1301_release(struct devic
 {
 	struct isp1301	*isp;
 
-	isp = container_of(dev, struct isp1301, client.dev);
+	isp = device_get_drvdata(dev);
 
 	/* ugly -- i2c hijacks our memory hook to wait_for_completion() */
 	if (isp->i2c_release)
@@ -1233,7 +1234,7 @@ static int isp1301_detach_client(struct 
 {
 	struct isp1301	*isp;
 
-	isp = container_of(i2c, struct isp1301, client);
+	isp = i2c_get_clientdata(i2c);
 
 	isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
 	isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
@@ -1285,7 +1286,7 @@ static int isp1301_otg_enable(struct isp
 	isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
 		INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
 
-	dev_info(&isp->client.dev, "ready for dual-role USB ...\n");
+	dev_info(&isp->client->dev, "ready for dual-role USB ...\n");
 
 	return 0;
 }
@@ -1310,7 +1311,7 @@ isp1301_set_host(struct otg_transceiver 
 
 #ifdef	CONFIG_USB_OTG
 	isp->otg.host = host;
-	dev_dbg(&isp->client.dev, "registered host\n");
+	dev_dbg(&isp->client->dev, "registered host\n");
 	host_suspend(isp);
 	if (isp->otg.gadget)
 		return isp1301_otg_enable(isp);
@@ -1325,7 +1326,7 @@ isp1301_set_host(struct otg_transceiver 
 	if (machine_is_omap_h2())
 		isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
 
-	dev_info(&isp->client.dev, "A-Host sessions ok\n");
+	dev_info(&isp->client->dev, "A-Host sessions ok\n");
 	isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
 		INTR_ID_GND);
 	isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
@@ -1343,7 +1344,7 @@ isp1301_set_host(struct otg_transceiver 
 	return 0;
 
 #else
-	dev_dbg(&isp->client.dev, "host sessions not allowed\n");
+	dev_dbg(&isp->client->dev, "host sessions not allowed\n");
 	return -EINVAL;
 #endif
 
@@ -1370,7 +1371,7 @@ isp1301_set_peripheral(struct otg_transc
 
 #ifdef	CONFIG_USB_OTG
 	isp->otg.gadget = gadget;
-	dev_dbg(&isp->client.dev, "registered gadget\n");
+	dev_dbg(&isp->client->dev, "registered gadget\n");
 	/* gadget driver may be suspended until vbus_connect () */
 	if (isp->otg.host)
 		return isp1301_otg_enable(isp);
@@ -1395,7 +1396,7 @@ isp1301_set_peripheral(struct otg_transc
 		INTR_SESS_VLD);
 	isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
 		INTR_VBUS_VLD);
-	dev_info(&isp->client.dev, "B-Peripheral sessions ok\n");
+	dev_info(&isp->client->dev, "B-Peripheral sessions ok\n");
 	dump_regs(isp, __func__);
 
 	/* If this has a Mini-AB connector, this mode is highly
@@ -1408,7 +1409,7 @@ isp1301_set_peripheral(struct otg_transc
 	return 0;
 
 #else
-	dev_dbg(&isp->client.dev, "peripheral sessions not allowed\n");
+	dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n");
 	return -EINVAL;
 #endif
 }
@@ -1528,12 +1529,12 @@ static int isp1301_probe(struct i2c_adap
 	isp->timer.data = (unsigned long) isp;
 
 	isp->irq = -1;
-	isp->client.addr = address;
-	i2c_set_clientdata(&isp->client, isp);
-	isp->client.adapter = bus;
-	isp->client.driver = &isp1301_driver;
-	strlcpy(isp->client.name, DRIVER_NAME, I2C_NAME_SIZE);
-	i2c = &isp->client;
+	isp->c.addr = address;
+	i2c_set_clientdata(&isp->c, isp);
+	isp->c.adapter = bus;
+	isp->c.driver = &isp1301_driver;
+	strlcpy(isp->c.name, DRIVER_NAME, I2C_NAME_SIZE);
+	isp->client = i2c = &isp->c;
 
 	/* if this is a true probe, verify the chip ... */
 	if (kind < 0) {
@@ -1618,7 +1619,7 @@ fail2:
 		goto fail1;
 	}
 
-	isp->otg.dev = &isp->client.dev;
+	isp->otg.dev = &isp->client->dev;
 	isp->otg.label = DRIVER_NAME;
 
 	isp->otg.set_host = isp1301_set_host,

[-- Attachment #3: i2c-isp1301_omap-convert-to-new-style-part-2.patch --]
[-- Type: text/x-patch, Size: 7514 bytes --]

From: Jean Delvare <khali@linux-fr.org>
Subject: i2c/isp1301_omap: Convert to a new-style i2c driver, part 2

Based on David Brownell's patch for tps65010 and previous work by
Felipe Balbi, this patch finishes conversting isp1301_omap to a
new-style i2c driver.

There's definitely room for further drivers cleanups, but these are
out of the scope of this patch.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
---
This needs testing! Both build-time and run-time.

 arch/arm/mach-omap1/board-h3.c   |    4 +
 arch/arm/mach-omap2/board-h4.c   |   11 ++++
 drivers/i2c/chips/isp1301_omap.c |   98 ++++++++++++--------------------------
 3 files changed, 48 insertions(+), 65 deletions(-)

--- linux-2.6.27-rc0.orig/arch/arm/mach-omap1/board-h3.c	2008-07-14 22:14:17.000000000 +0200
+++ linux-2.6.27-rc0/arch/arm/mach-omap1/board-h3.c	2008-07-15 23:21:23.000000000 +0200
@@ -476,6 +476,10 @@ static struct i2c_board_info __initdata 
 		I2C_BOARD_INFO("tps65013", 0x48),
                /* .irq         = OMAP_GPIO_IRQ(??), */
        },
+	{
+		I2C_BOARD_INFO("isp1301_omap", 0x2d),
+		.irq		= OMAP_GPIO_IRQ(14),
+	},
 };
 
 static struct omap_gpio_switch h3_gpio_switches[] __initdata = {
--- linux-2.6.27-rc0.orig/arch/arm/mach-omap2/board-h4.c	2008-07-14 22:14:18.000000000 +0200
+++ linux-2.6.27-rc0/arch/arm/mach-omap2/board-h4.c	2008-07-15 23:21:23.000000000 +0200
@@ -18,6 +18,7 @@
 #include <linux/mtd/partitions.h>
 #include <linux/delay.h>
 #include <linux/workqueue.h>
+#include <linux/i2c.h>
 #include <linux/input.h>
 #include <linux/err.h>
 #include <linux/clk.h>
@@ -392,6 +393,13 @@ static struct omap_board_config_kernel h
 	{ OMAP_TAG_LCD,		&h4_lcd_config },
 };
 
+static struct i2c_board_info __initdata h4_i2c_board_info[] = {
+	{
+		I2C_BOARD_INFO("isp1301_omap", 0x2d),
+		.irq		= OMAP_GPIO_IRQ(125),
+	},
+};
+
 static void __init omap_h4_init(void)
 {
 	/*
@@ -412,6 +420,9 @@ static void __init omap_h4_init(void)
 	}
 #endif
 
+	i2c_register_board_info(1, h4_i2c_board_info,
+			ARRAY_SIZE(h4_i2c_board_info));
+
 	platform_add_devices(h4_devices, ARRAY_SIZE(h4_devices));
 	omap_board_config = h4_config;
 	omap_board_config_size = ARRAY_SIZE(h4_config);
--- linux-2.6.27-rc0.orig/drivers/i2c/chips/isp1301_omap.c	2008-07-15 23:15:34.000000000 +0200
+++ linux-2.6.27-rc0/drivers/i2c/chips/isp1301_omap.c	2008-07-15 23:21:23.000000000 +0200
@@ -50,10 +50,8 @@ MODULE_LICENSE("GPL");
 struct isp1301 {
 	struct otg_transceiver	otg;
 	struct i2c_client	*client;
-	struct i2c_client	c;
 	void			(*i2c_release)(struct device *dev);
 
-	int			irq;
 	int			irq_type;
 
 	u32			last_otg_ctrl;
@@ -139,14 +137,6 @@ static inline void notresponding(struct 
 
 /*-------------------------------------------------------------------------*/
 
-/* only two addresses possible */
-#define	ISP_BASE		0x2c
-static unsigned short normal_i2c[] = {
-	ISP_BASE, ISP_BASE + 1,
-	I2C_CLIENT_END };
-
-I2C_CLIENT_INSMOD;
-
 static struct i2c_driver isp1301_driver;
 
 /* smbus apis are used for portability */
@@ -1230,7 +1220,7 @@ static void isp1301_release(struct devic
 
 static struct isp1301 *the_transceiver;
 
-static int isp1301_detach_client(struct i2c_client *i2c)
+static int __exit isp1301_remove(struct i2c_client *i2c)
 {
 	struct isp1301	*isp;
 
@@ -1238,7 +1228,7 @@ static int isp1301_detach_client(struct 
 
 	isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
 	isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
-	free_irq(isp->irq, isp);
+	free_irq(i2c->irq, isp);
 #ifdef	CONFIG_USB_OTG
 	otg_unbind(isp);
 #endif
@@ -1253,7 +1243,7 @@ static int isp1301_detach_client(struct 
 	put_device(&i2c->dev);
 	the_transceiver = 0;
 
-	return i2c_detach_client(i2c);
+	return 0;
 }
 
 /*-------------------------------------------------------------------------*/
@@ -1509,12 +1499,10 @@ isp1301_start_hnp(struct otg_transceiver
 
 /*-------------------------------------------------------------------------*/
 
-/* no error returns, they'd just make bus scanning stop */
-static int isp1301_probe(struct i2c_adapter *bus, int address, int kind)
+static int __init isp1301_probe(struct i2c_client *i2c)
 {
 	int			status;
 	struct isp1301		*isp;
-	struct i2c_client	*i2c;
 
 	if (the_transceiver)
 		return 0;
@@ -1528,37 +1516,19 @@ static int isp1301_probe(struct i2c_adap
 	isp->timer.function = isp1301_timer;
 	isp->timer.data = (unsigned long) isp;
 
-	isp->irq = -1;
-	isp->c.addr = address;
-	i2c_set_clientdata(&isp->c, isp);
-	isp->c.adapter = bus;
-	isp->c.driver = &isp1301_driver;
-	strlcpy(isp->c.name, DRIVER_NAME, I2C_NAME_SIZE);
-	isp->client = i2c = &isp->c;
-
-	/* if this is a true probe, verify the chip ... */
-	if (kind < 0) {
-		status = isp1301_get_u16(isp, ISP1301_VENDOR_ID);
-		if (status != I2C_VENDOR_ID_PHILIPS) {
-			dev_dbg(&bus->dev, "addr %d not philips id: %d\n",
-				address, status);
-			goto fail1;
-		}
-		status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID);
-		if (status != I2C_PRODUCT_ID_PHILIPS_1301) {
-			dev_dbg(&bus->dev, "%d not isp1301, %d\n",
-				address, status);
-			goto fail1;
-		}
-	}
+	i2c_set_clientdata(i2c, isp);
+	isp->client = i2c;
 
-	status = i2c_attach_client(i2c);
-	if (status < 0) {
-		dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n",
-				DRIVER_NAME, address, status);
-fail1:
-		kfree(isp);
-		return 0;
+	/* verify the chip (shouldn't be necesary) */
+	status = isp1301_get_u16(isp, ISP1301_VENDOR_ID);
+	if (status != I2C_VENDOR_ID_PHILIPS) {
+		dev_dbg(&i2c->dev, "not philips id: %d\n", status);
+		goto fail;
+	}
+	status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID);
+	if (status != I2C_PRODUCT_ID_PHILIPS_1301) {
+		dev_dbg(&i2c->dev, "not isp1301, %d\n", status);
+		goto fail;
 	}
 	isp->i2c_release = i2c->dev.release;
 	i2c->dev.release = isp1301_release;
@@ -1587,7 +1557,7 @@ fail1:
 	status = otg_bind(isp);
 	if (status < 0) {
 		dev_dbg(&i2c->dev, "can't bind OTG\n");
-		goto fail2;
+		goto fail;
 	}
 #endif
 
@@ -1600,26 +1570,21 @@ fail1:
 
 		/* IRQ wired at M14 */
 		omap_cfg_reg(M14_1510_GPIO2);
-		isp->irq = OMAP_GPIO_IRQ(2);
 		if (gpio_request(2, "isp1301") == 0)
 			gpio_direction_input(2);
 		isp->irq_type = IRQF_TRIGGER_FALLING;
 	}
 
 	isp->irq_type |= IRQF_SAMPLE_RANDOM;
-	status = request_irq(isp->irq, isp1301_irq,
+	status = request_irq(i2c->irq, isp1301_irq,
 			isp->irq_type, DRIVER_NAME, isp);
 	if (status < 0) {
 		dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n",
-				isp->irq, status);
-#ifdef	CONFIG_USB_OTG
-fail2:
-#endif
-		i2c_detach_client(i2c);
-		goto fail1;
+				i2c->irq, status);
+		goto fail;
 	}
 
-	isp->otg.dev = &isp->client->dev;
+	isp->otg.dev = &i2c->dev;
 	isp->otg.label = DRIVER_NAME;
 
 	isp->otg.set_host = isp1301_set_host,
@@ -1650,22 +1615,25 @@ fail2:
 			status);
 
 	return 0;
-}
 
-static int isp1301_scan_bus(struct i2c_adapter *bus)
-{
-	if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA
-			| I2C_FUNC_SMBUS_READ_WORD_DATA))
-		return -EINVAL;
-	return i2c_probe(bus, &addr_data, isp1301_probe);
+fail:
+	kfree(isp);
+	return -ENODEV;
 }
 
+static const struct i2c_device_id isp1301_id[] = {
+	{ "isp1301_omap", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, isp1301_id);
+
 static struct i2c_driver isp1301_driver = {
 	.driver = {
 		.name	= "isp1301_omap",
 	},
-	.attach_adapter	= isp1301_scan_bus,
-	.detach_client	= isp1301_detach_client,
+	.probe		= isp1301_probe,
+	.remove		= __exit_p(isp1301_remove),
+	.id_table	= isp1301_id,
 };
 
 /*-------------------------------------------------------------------------*/