drivers/i2c/tas5825m: Use I2C instead of SMBus

The latest Clevo boards connect the TAS5825M to one of the I2C
connections instead of the SMBus connection. The I2C ops are compatible
with SMBus, so always use them.

Change-Id: I5152db647094acf473cc798970dd9d97543df4d7
Signed-off-by: Tim Crawford <tcrawford@system76.com>

src/drivers/i2c/tas5825m/tas5825m.c

@@ -1,23 +1,24 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <console/console.h>
-#include <device/smbus.h>
-#include <device/pci.h>
+#include <device/i2c_bus.h>
 #include "chip.h"
 #include "tas5825m.h"
 
 int tas5825m_write_at(struct device *dev, uint8_t addr, uint8_t value)
 {
-	return smbus_write_byte(dev, addr, value);
+	return i2c_dev_writeb_at(dev, addr, value);
 }
 
-//TODO: use I2C block write for better performance
 int tas5825m_write_block_at(struct device *dev, uint8_t addr,
 	const uint8_t *values, uint8_t length)
 {
+	// TODO: use I2C block write for better performance; SMBus does not
+	// have `transfer` op for it.
+
 	int res = 0;
 	for (uint8_t i = 0; i < length; i++) {
-		res = smbus_write_byte(dev, addr + i, values[i]);
+		res = i2c_dev_writeb_at(dev, addr + i, values[i]);
 		if (res < 0)
 			return res;
 	}
@@ -45,8 +46,7 @@ __weak int tas5825m_setup(struct device *dev, int id)
 
 static void tas5825m_init(struct device *dev)
 {
-	if (dev->enabled && dev->path.type == DEVICE_PATH_I2C &&
-		ops_smbus_bus(get_pbus_smbus(dev))) {
+	if (dev->enabled && dev->path.type == DEVICE_PATH_I2C && i2c_link(dev)) {
 		printk(BIOS_DEBUG, "tas5825m at %s\n", dev_path(dev));
 
 		struct drivers_i2c_tas5825m_config *config = dev->chip_info;