dm: i2c: Provide an offset length parameter where needed

Rather than assuming that the chip offset length is 1, allow it to be
provided. This allows chips that don't use the default offset length to
be used (at present they are only supported by the command line 'i2c'
command which sets the offset length explicitly).

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>

12 files changed, 32 insertions, 26 deletions

diff --git a/arch/arm/cpu/tegra20-common/pmu.c b/arch/arm/cpu/tegra20-common/pmu.c
index 36a76a24d9..a774246a27 100644
--- a/arch/arm/cpu/tegra20-common/pmu.c
+++ b/arch/arm/cpu/tegra20-common/pmu.c
@@ -52,7 +52,7 @@ int pmu_set_nominal(void)
 		debug("%s: Cannot find DVC I2C bus\n", __func__);
 		return ret;
 	}
-	ret = i2c_get_chip(bus, PMI_I2C_ADDRESS, &dev);
+	ret = i2c_get_chip(bus, PMI_I2C_ADDRESS, 1, &dev);
 	if (ret) {
 		debug("%s: Cannot find DVC I2C chip\n", __func__);
 		return ret;
diff --git a/board/avionic-design/common/tamonten-ng.c b/board/avionic-design/common/tamonten-ng.c
index bca91831e0..1704627112 100644
--- a/board/avionic-design/common/tamonten-ng.c
+++ b/board/avionic-design/common/tamonten-ng.c
@@ -55,7 +55,7 @@ void pmu_write(uchar reg, uchar data)
 	struct udevice *dev;
 	int ret;
 
-	ret = i2c_get_chip_for_busnum(4, PMU_I2C_ADDRESS, &dev);
+	ret = i2c_get_chip_for_busnum(4, PMU_I2C_ADDRESS, 1, &dev);
 	if (ret) {
 		debug("%s: Cannot find PMIC I2C chip\n", __func__);
 		return;
diff --git a/board/nvidia/cardhu/cardhu.c b/board/nvidia/cardhu/cardhu.c
index fc31d29140..1540526a61 100644
--- a/board/nvidia/cardhu/cardhu.c
+++ b/board/nvidia/cardhu/cardhu.c
@@ -46,7 +46,7 @@ void board_sdmmc_voltage_init(void)
 	int ret;
 	int i;
 
-	ret = i2c_get_chip_for_busnum(0, PMU_I2C_ADDRESS, &dev);
+	ret = i2c_get_chip_for_busnum(0, PMU_I2C_ADDRESS, 1, &dev);
 	if (ret) {
 		debug("%s: Cannot find PMIC I2C chip\n", __func__);
 		return;
@@ -94,7 +94,7 @@ int tegra_pcie_board_init(void)
 	u8 addr, data[1];
 	int err;
 
-	err = i2c_get_chip_for_busnum(0, PMU_I2C_ADDRESS, &dev);
+	err = i2c_get_chip_for_busnum(0, PMU_I2C_ADDRESS, 1, &dev);
 	if (err) {
 		debug("failed to find PMU bus\n");
 		return err;
diff --git a/board/nvidia/dalmore/dalmore.c b/board/nvidia/dalmore/dalmore.c
index c0991c57a9..d7c1a695ff 100644
--- a/board/nvidia/dalmore/dalmore.c
+++ b/board/nvidia/dalmore/dalmore.c
@@ -55,7 +55,7 @@ void board_sdmmc_voltage_init(void)
 	uchar reg, data_buffer[1];
 	int ret;
 
-	ret = i2c_get_chip_for_busnum(0, PMU_I2C_ADDRESS, &dev);
+	ret = i2c_get_chip_for_busnum(0, PMU_I2C_ADDRESS, 1, &dev);
 	if (ret) {
 		debug("%s: Cannot find PMIC I2C chip\n", __func__);
 		return;
@@ -83,7 +83,7 @@ void board_sdmmc_voltage_init(void)
 	data_buffer[0] = 0x03;
 	reg = 0x14;
 
-	ret = i2c_get_chip_for_busnum(0, BAT_I2C_ADDRESS, &dev);
+	ret = i2c_get_chip_for_busnum(0, BAT_I2C_ADDRESS, 1, &dev);
 	if (ret) {
 		debug("%s: Cannot find charger I2C chip\n", __func__);
 		return;
diff --git a/board/nvidia/whistler/whistler.c b/board/nvidia/whistler/whistler.c
index ad6ea091df..3476f1159f 100644
--- a/board/nvidia/whistler/whistler.c
+++ b/board/nvidia/whistler/whistler.c
@@ -27,7 +27,7 @@ void pin_mux_mmc(void)
 	int ret;
 
 	/* Turn on MAX8907B LDO12 to 2.8V for J40 power */
-	ret = i2c_get_chip_for_busnum(0, 0x3c, &dev);
+	ret = i2c_get_chip_for_busnum(0, 0x3c, 1, &dev);
 	if (ret) {
 		printf("%s: Cannot find MAX8907B I2C chip\n", __func__);
 		return;
@@ -64,7 +64,7 @@ void pin_mux_usb(void)
 	 */
 
 	/* Turn on TAC6416's GPIO 0+1 for USB1/3's VBUS */
-	ret = i2c_get_chip_for_busnum(0, 0x20, &dev);
+	ret = i2c_get_chip_for_busnum(0, 0x20, 1, &dev);
 	if (ret) {
 		printf("%s: Cannot find TAC6416 I2C chip\n", __func__);
 		return;
diff --git a/board/toradex/apalis_t30/apalis_t30.c b/board/toradex/apalis_t30/apalis_t30.c
index 1c4b4c1cd4..624421496a 100644
--- a/board/toradex/apalis_t30/apalis_t30.c
+++ b/board/toradex/apalis_t30/apalis_t30.c
@@ -42,7 +42,7 @@ int tegra_pcie_board_init(void)
 	u8 addr, data[1];
 	int err;
 
-	err = i2c_get_chip_for_busnum(0, PMU_I2C_ADDRESS, &dev);
+	err = i2c_get_chip_for_busnum(0, PMU_I2C_ADDRESS, 1, &dev);
 	if (err) {
 		debug("%s: Cannot find PMIC I2C chip\n", __func__);
 		return err;
diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c
index 1e500fbf2c..7c3ad00fdf 100644
--- a/common/cmd_i2c.c
+++ b/common/cmd_i2c.c
@@ -168,7 +168,7 @@ static int i2c_get_cur_bus_chip(uint chip_addr, struct udevice **devp)
 	if (ret)
 		return ret;
 
-	return i2c_get_chip(bus, chip_addr, devp);
+	return i2c_get_chip(bus, chip_addr, 1, devp);
 }
 
 #endif
diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c
index 25f2c18cf4..24e5ec68f2 100644
--- a/drivers/i2c/i2c-uclass.c
+++ b/drivers/i2c/i2c-uclass.c
@@ -220,7 +220,7 @@ static int i2c_probe_chip(struct udevice *bus, uint chip_addr,
 	return ops->xfer(bus, msg, 1);
 }
 
-static int i2c_bind_driver(struct udevice *bus, uint chip_addr,
+static int i2c_bind_driver(struct udevice *bus, uint chip_addr, uint offset_len,
 			   struct udevice **devp)
 {
 	struct dm_i2c_chip chip;
@@ -238,7 +238,7 @@ static int i2c_bind_driver(struct udevice *bus, uint chip_addr,
 	/* Tell the device what we know about it */
 	memset(&chip, '\0', sizeof(chip));
 	chip.chip_addr = chip_addr;
-	chip.offset_len = 1;	/* we assume */
+	chip.offset_len = offset_len;
 	ret = device_probe_child(dev, &chip);
 	debug("%s:  device_probe_child: ret=%d\n", __func__, ret);
 	if (ret)
@@ -254,7 +254,8 @@ err_bind:
 	return ret;
 }
 
-int i2c_get_chip(struct udevice *bus, uint chip_addr, struct udevice **devp)
+int i2c_get_chip(struct udevice *bus, uint chip_addr, uint offset_len,
+		 struct udevice **devp)
 {
 	struct udevice *dev;
 
@@ -281,10 +282,11 @@ int i2c_get_chip(struct udevice *bus, uint chip_addr, struct udevice **devp)
 		}
 	}
 	debug("not found\n");
-	return i2c_bind_driver(bus, chip_addr, devp);
+	return i2c_bind_driver(bus, chip_addr, offset_len, devp);
 }
 
-int i2c_get_chip_for_busnum(int busnum, int chip_addr, struct udevice **devp)
+int i2c_get_chip_for_busnum(int busnum, int chip_addr, uint offset_len,
+			    struct udevice **devp)
 {
 	struct udevice *bus;
 	int ret;
@@ -294,7 +296,7 @@ int i2c_get_chip_for_busnum(int busnum, int chip_addr, struct udevice **devp)
 		debug("Cannot find I2C bus %d\n", busnum);
 		return ret;
 	}
-	ret = i2c_get_chip(bus, chip_addr, devp);
+	ret = i2c_get_chip(bus, chip_addr, offset_len, devp);
 	if (ret) {
 		debug("Cannot find I2C chip %02x on bus %d\n", chip_addr,
 		      busnum);
@@ -319,7 +321,7 @@ int dm_i2c_probe(struct udevice *bus, uint chip_addr, uint chip_flags,
 		return ret;
 
 	/* The chip was found, see if we have a driver, and probe it */
-	ret = i2c_get_chip(bus, chip_addr, devp);
+	ret = i2c_get_chip(bus, chip_addr, 1, devp);
 	debug("%s:  i2c_get_chip: ret=%d\n", __func__, ret);
 
 	return ret;
diff --git a/drivers/i2c/sandbox_i2c.c b/drivers/i2c/sandbox_i2c.c
index f0e9f51a1f..e2f6c3b9bb 100644
--- a/drivers/i2c/sandbox_i2c.c
+++ b/drivers/i2c/sandbox_i2c.c
@@ -60,7 +60,7 @@ static int sandbox_i2c_xfer(struct udevice *bus, struct i2c_msg *msg,
 	if (msg->addr == SANDBOX_I2C_TEST_ADDR)
 		return 0;
 
-	ret = i2c_get_chip(bus, msg->addr, &dev);
+	ret = i2c_get_chip(bus, msg->addr, 1, &dev);
 	if (ret)
 		return ret;
 
diff --git a/drivers/power/as3722.c b/drivers/power/as3722.c
index 3aafdc9670..a60bb5f83f 100644
--- a/drivers/power/as3722.c
+++ b/drivers/power/as3722.c
@@ -242,7 +242,7 @@ int as3722_init(struct udevice **devp)
 	const unsigned int address = 0x40;
 	int err;
 
-	err = i2c_get_chip_for_busnum(bus, address, &pmic);
+	err = i2c_get_chip_for_busnum(bus, address, 1, &pmic);
 	if (err)
 		return err;
 	err = as3722_read_id(pmic, &id, &revision);
diff --git a/include/i2c.h b/include/i2c.h
index 47529f4b28..76090b7a93 100644
--- a/include/i2c.h
+++ b/include/i2c.h
@@ -388,10 +388,12 @@ struct dm_i2c_ops {
  *
  * @bus:	Bus to examine
  * @chip_addr:	Chip address for the new device
+ * @offset_len:	Length of a register offset in bytes (normally 1)
  * @devp:	Returns pointer to new device if found or -ENODEV if not
  *		found
  */
-int i2c_get_chip(struct udevice *bus, uint chip_addr, struct udevice **devp);
+int i2c_get_chip(struct udevice *bus, uint chip_addr, uint offset_len,
+		 struct udevice **devp);
 
 /**
  * i2c_get_chip() - get a device to use to access a chip on a bus number
@@ -401,10 +403,12 @@ int i2c_get_chip(struct udevice *bus, uint chip_addr, struct udevice **devp);
  *
  * @busnum:	Bus number to examine
  * @chip_addr:	Chip address for the new device
+ * @offset_len:	Length of a register offset in bytes (normally 1)
  * @devp:	Returns pointer to new device if found or -ENODEV if not
  *		found
  */
-int i2c_get_chip_for_busnum(int busnum, int chip_addr, struct udevice **devp);
+int i2c_get_chip_for_busnum(int busnum, int chip_addr, uint offset_len,
+			    struct udevice **devp);
 
 /**
  * i2c_chip_ofdata_to_platdata() - Decode standard I2C platform data
diff --git a/test/dm/i2c.c b/test/dm/i2c.c
index 4823b0c648..ef88372d56 100644
--- a/test/dm/i2c.c
+++ b/test/dm/i2c.c
@@ -49,7 +49,7 @@ static int dm_test_i2c_read_write(struct dm_test_state *dms)
 	uint8_t buf[5];
 
 	ut_assertok(uclass_get_device_by_seq(UCLASS_I2C, busnum, &bus));
-	ut_assertok(i2c_get_chip(bus, chip, &dev));
+	ut_assertok(i2c_get_chip(bus, chip, 1, &dev));
 	ut_assertok(dm_i2c_read(dev, 0, buf, 5));
 	ut_assertok(memcmp(buf, "\0\0\0\0\0", sizeof(buf)));
 	ut_assertok(dm_i2c_write(dev, 2, (uint8_t *)"AB", 2));
@@ -66,7 +66,7 @@ static int dm_test_i2c_speed(struct dm_test_state *dms)
 	uint8_t buf[5];
 
 	ut_assertok(uclass_get_device_by_seq(UCLASS_I2C, busnum, &bus));
-	ut_assertok(i2c_get_chip(bus, chip, &dev));
+	ut_assertok(i2c_get_chip(bus, chip, 1, &dev));
 	ut_assertok(i2c_set_bus_speed(bus, 100000));
 	ut_assertok(dm_i2c_read(dev, 0, buf, 5));
 	ut_assertok(i2c_set_bus_speed(bus, 400000));
@@ -84,7 +84,7 @@ static int dm_test_i2c_offset_len(struct dm_test_state *dms)
 	uint8_t buf[5];
 
 	ut_assertok(uclass_get_device_by_seq(UCLASS_I2C, busnum, &bus));
-	ut_assertok(i2c_get_chip(bus, chip, &dev));
+	ut_assertok(i2c_get_chip(bus, chip, 1, &dev));
 	ut_assertok(i2c_set_chip_offset_len(dev, 1));
 	ut_assertok(dm_i2c_read(dev, 0, buf, 5));
 
@@ -113,7 +113,7 @@ static int dm_test_i2c_bytewise(struct dm_test_state *dms)
 	uint8_t buf[5];
 
 	ut_assertok(uclass_get_device_by_seq(UCLASS_I2C, busnum, &bus));
-	ut_assertok(i2c_get_chip(bus, chip, &dev));
+	ut_assertok(i2c_get_chip(bus, chip, 1, &dev));
 	ut_assertok(dm_i2c_read(dev, 0, buf, 5));
 	ut_assertok(memcmp(buf, "\0\0\0\0\0", sizeof(buf)));
 
@@ -167,7 +167,7 @@ static int dm_test_i2c_offset(struct dm_test_state *dms)
 	struct udevice *dev;
 	uint8_t buf[5];
 
-	ut_assertok(i2c_get_chip_for_busnum(busnum, chip, &dev));
+	ut_assertok(i2c_get_chip_for_busnum(busnum, chip, 1, &dev));
 
 	/* Do a transfer so we can find the emulator */
 	ut_assertok(dm_i2c_read(dev, 0, buf, 5));