i2c: mlxbf: support BlueField-3 SoC

BlueField-3 SoC has the same I2C IP logic as previous
BlueField-1 and 2 SoCs but it has different registers' addresses.
This is an effort to keep this driver generic across all
BlueField generations.
This patch breaks down the "smbus" resource into 3 separate
resources to enable us to use common registers' offsets for all
BlueField SoCs:
struct mlxbf_i2c_resource *timer;
struct mlxbf_i2c_resource *mst;
struct mlxbf_i2c_resource *slv;

Of course, all offsets had to be adjusted accordingly, and we took
this chance to reorganize the macros depending on the register block
they target.

There are only 2 registers' offsets that do not fit within this
schema so their offsets are passed as SoC-specific parameters:
smbus_master_rs_bytes_off
smbus_master_fsm_off

Reviewed-by: Khalil Blaiech <kblaiech@nvidia.com>
Signed-off-by: Asmaa Mnebhi <asmaa@nvidia.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

1 files changed, 284 insertions, 171 deletions

diff --git a/drivers/i2c/busses/i2c-mlxbf.c b/drivers/i2c/busses/i2c-mlxbf.c
index e9e700012136..db65d4235658 100644
--- a/drivers/i2c/busses/i2c-mlxbf.c
+++ b/drivers/i2c/busses/i2c-mlxbf.c
@@ -32,8 +32,6 @@
 	(MLXBF_I2C_FUNC_SMBUS_DEFAULT | MLXBF_I2C_FUNC_SMBUS_BLOCK | \
 	 I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SLAVE)
 
-#define MLXBF_I2C_SMBUS_MAX        3
-
 /* Shared resources info in BlueField platforms. */
 
 #define MLXBF_I2C_COALESCE_TYU_ADDR    0x02801300
@@ -48,6 +46,9 @@
 #define MLXBF_I2C_COREPLL_YU_ADDR      0x02800c30
 #define MLXBF_I2C_COREPLL_YU_SIZE      0x00c
 
+#define MLXBF_I2C_COREPLL_RSH_YU_ADDR  0x13409824
+#define MLXBF_I2C_COREPLL_RSH_YU_SIZE  0x00c
+
 #define MLXBF_I2C_SHARED_RES_MAX       3
 
 /*
@@ -131,14 +132,10 @@
 /* Slave busy bit reset. */
 #define MLXBF_I2C_CAUSE_S_GW_BUSY_FALL        BIT(18)
 
-#define MLXBF_I2C_CAUSE_SLAVE_ARBITER_BITS_MASK     GENMASK(20, 0)
-
 /* Cause coalesce registers. */
 #define MLXBF_I2C_CAUSE_COALESCE_0        0x00
-#define MLXBF_I2C_CAUSE_COALESCE_1        0x04
-#define MLXBF_I2C_CAUSE_COALESCE_2        0x08
 
-#define MLXBF_I2C_CAUSE_TYU_SLAVE_BIT   MLXBF_I2C_SMBUS_MAX
+#define MLXBF_I2C_CAUSE_TYU_SLAVE_BIT   3
 #define MLXBF_I2C_CAUSE_YU_SLAVE_BIT    1
 
 /* Functional enable register. */
@@ -165,15 +162,6 @@
 #define MLXBF_I2C_GPIO_SMBUS_GW_ASSERT_PINS(num, val) \
 	((val) | (0x3 << MLXBF_I2C_GPIO_SMBUS_GW_PINS(num)))
 
-/* SMBus timing parameters. */
-#define MLXBF_I2C_SMBUS_TIMER_SCL_LOW_SCL_HIGH    0x00
-#define MLXBF_I2C_SMBUS_TIMER_FALL_RISE_SPIKE     0x04
-#define MLXBF_I2C_SMBUS_TIMER_THOLD               0x08
-#define MLXBF_I2C_SMBUS_TIMER_TSETUP_START_STOP   0x0c
-#define MLXBF_I2C_SMBUS_TIMER_TSETUP_DATA         0x10
-#define MLXBF_I2C_SMBUS_THIGH_MAX_TBUF            0x14
-#define MLXBF_I2C_SMBUS_SCL_LOW_TIMEOUT           0x18
-
 /*
  * Defines SMBus operating frequency and core clock frequency.
  * According to ADB files, default values are compliant to 100KHz SMBus
@@ -192,26 +180,37 @@
 #define MLXBF_I2C_COREPLL_CORE_OD_YU_MASK   GENMASK(3, 0)
 #define MLXBF_I2C_COREPLL_CORE_R_YU_MASK    GENMASK(31, 26)
 
+/* SMBus timing parameters. */
+#define MLXBF_I2C_SMBUS_TIMER_SCL_LOW_SCL_HIGH    0x00
+#define MLXBF_I2C_SMBUS_TIMER_FALL_RISE_SPIKE     0x04
+#define MLXBF_I2C_SMBUS_TIMER_THOLD               0x08
+#define MLXBF_I2C_SMBUS_TIMER_TSETUP_START_STOP   0x0c
+#define MLXBF_I2C_SMBUS_TIMER_TSETUP_DATA         0x10
+#define MLXBF_I2C_SMBUS_THIGH_MAX_TBUF            0x14
+#define MLXBF_I2C_SMBUS_SCL_LOW_TIMEOUT           0x18
 
-/* Core PLL frequency. */
-static u64 mlxbf_i2c_corepll_frequency;
+#define MLXBF_I2C_SHIFT_0   0
+#define MLXBF_I2C_SHIFT_8   8
+#define MLXBF_I2C_SHIFT_16  16
+#define MLXBF_I2C_SHIFT_24  24
+
+#define MLXBF_I2C_MASK_8    GENMASK(7, 0)
+#define MLXBF_I2C_MASK_16   GENMASK(15, 0)
+
+#define MLXBF_I2C_MST_ADDR_OFFSET         0x200
 
 /* SMBus Master GW. */
-#define MLXBF_I2C_SMBUS_MASTER_GW     0x200
+#define MLXBF_I2C_SMBUS_MASTER_GW         0x0
 /* Number of bytes received and sent. */
-#define MLXBF_I2C_SMBUS_RS_BYTES      0x300
+#define MLXBF_I2C_YU_SMBUS_RS_BYTES       0x100
+#define MLXBF_I2C_RSH_YU_SMBUS_RS_BYTES   0x10c
 /* Packet error check (PEC) value. */
-#define MLXBF_I2C_SMBUS_MASTER_PEC    0x304
+#define MLXBF_I2C_SMBUS_MASTER_PEC        0x104
 /* Status bits (ACK/NACK/FW Timeout). */
-#define MLXBF_I2C_SMBUS_MASTER_STATUS 0x308
+#define MLXBF_I2C_SMBUS_MASTER_STATUS     0x108
 /* SMbus Master Finite State Machine. */
-#define MLXBF_I2C_SMBUS_MASTER_FSM    0x310
-
-/*
- * When enabled, the master will issue a stop condition in case of
- * timeout while waiting for FW response.
- */
-#define MLXBF_I2C_SMBUS_EN_FW_TIMEOUT 0x31c
+#define MLXBF_I2C_YU_SMBUS_MASTER_FSM     0x110
+#define MLXBF_I2C_RSH_YU_SMBUS_MASTER_FSM 0x100
 
 /* SMBus master GW control bits offset in MLXBF_I2C_SMBUS_MASTER_GW[31:3]. */
 #define MLXBF_I2C_MASTER_LOCK_BIT         BIT(31) /* Lock bit. */
@@ -231,14 +230,14 @@ static u64 mlxbf_i2c_corepll_frequency;
 #define MLXBF_I2C_MASTER_ENABLE_READ \
 	(MLXBF_I2C_MASTER_ENABLE | MLXBF_I2C_MASTER_CTL_READ_BIT)
 
-#define MLXBF_I2C_MASTER_SLV_ADDR_SHIFT   12 /* Slave address shift. */
-#define MLXBF_I2C_MASTER_WRITE_SHIFT      21 /* Control write bytes shift. */
-#define MLXBF_I2C_MASTER_SEND_PEC_SHIFT   20 /* Send PEC byte shift. */
-#define MLXBF_I2C_MASTER_PARSE_EXP_SHIFT  11 /* Parse expected bytes shift. */
-#define MLXBF_I2C_MASTER_READ_SHIFT       4  /* Control read bytes shift. */
+#define MLXBF_I2C_MASTER_WRITE_SHIFT      21 /* Control write bytes */
+#define MLXBF_I2C_MASTER_SEND_PEC_SHIFT   20 /* Send PEC byte when set to 1 */
+#define MLXBF_I2C_MASTER_PARSE_EXP_SHIFT  11 /* Control parse expected bytes */
+#define MLXBF_I2C_MASTER_SLV_ADDR_SHIFT   12 /* Slave address */
+#define MLXBF_I2C_MASTER_READ_SHIFT       4  /* Control read bytes */
 
 /* SMBus master GW Data descriptor. */
-#define MLXBF_I2C_MASTER_DATA_DESC_ADDR   0x280
+#define MLXBF_I2C_MASTER_DATA_DESC_ADDR   0x80
 #define MLXBF_I2C_MASTER_DATA_DESC_SIZE   0x80 /* Size in bytes. */
 
 /* Maximum bytes to read/write per SMBus transaction. */
@@ -264,19 +263,21 @@ static u64 mlxbf_i2c_corepll_frequency;
 #define MLXBF_I2C_SMBUS_MASTER_FSM_STOP_MASK      BIT(31)
 #define MLXBF_I2C_SMBUS_MASTER_FSM_PS_STATE_MASK  BIT(15)
 
+#define MLXBF_I2C_SLV_ADDR_OFFSET             0x400
+
 /* SMBus slave GW. */
-#define MLXBF_I2C_SMBUS_SLAVE_GW              0x400
+#define MLXBF_I2C_SMBUS_SLAVE_GW              0x0
 /* Number of bytes received and sent from/to master. */
-#define MLXBF_I2C_SMBUS_SLAVE_RS_MASTER_BYTES 0x500
+#define MLXBF_I2C_SMBUS_SLAVE_RS_MASTER_BYTES 0x100
 /* Packet error check (PEC) value. */
-#define MLXBF_I2C_SMBUS_SLAVE_PEC             0x504
+#define MLXBF_I2C_SMBUS_SLAVE_PEC             0x104
 /* SMBus slave Finite State Machine (FSM). */
-#define MLXBF_I2C_SMBUS_SLAVE_FSM             0x510
+#define MLXBF_I2C_SMBUS_SLAVE_FSM             0x110
 /*
  * Should be set when all raised causes handled, and cleared by HW on
  * every new cause.
  */
-#define MLXBF_I2C_SMBUS_SLAVE_READY           0x52c
+#define MLXBF_I2C_SMBUS_SLAVE_READY           0x12c
 
 /* SMBus slave GW control bits offset in MLXBF_I2C_SMBUS_SLAVE_GW[31:19]. */
 #define MLXBF_I2C_SLAVE_BUSY_BIT         BIT(30) /* Busy bit. */
@@ -289,13 +290,13 @@ static u64 mlxbf_i2c_corepll_frequency;
 #define MLXBF_I2C_SLAVE_SEND_PEC_SHIFT    21 /* Send PEC byte shift. */
 
 /* SMBus slave GW Data descriptor. */
-#define MLXBF_I2C_SLAVE_DATA_DESC_ADDR   0x480
+#define MLXBF_I2C_SLAVE_DATA_DESC_ADDR   0x80
 #define MLXBF_I2C_SLAVE_DATA_DESC_SIZE   0x80 /* Size in bytes. */
 
 /* SMbus slave configuration registers. */
-#define MLXBF_I2C_SMBUS_SLAVE_ADDR_CFG        0x514
+#define MLXBF_I2C_SMBUS_SLAVE_ADDR_CFG        0x114
 #define MLXBF_I2C_SMBUS_SLAVE_ADDR_CNT        16
-#define MLXBF_I2C_SMBUS_SLAVE_ADDR_EN_BIT     7
+#define MLXBF_I2C_SMBUS_SLAVE_ADDR_EN_BIT     BIT(7)
 #define MLXBF_I2C_SMBUS_SLAVE_ADDR_MASK       GENMASK(6, 0)
 
 /*
@@ -305,6 +306,59 @@ static u64 mlxbf_i2c_corepll_frequency;
 #define MLXBF_I2C_SMBUS_TIMEOUT   (300 * 1000) /* 300ms */
 #define MLXBF_I2C_SMBUS_LOCK_POLL_TIMEOUT (300 * 1000) /* 300ms */
 
+/* Polling frequency in microseconds. */
+#define MLXBF_I2C_POLL_FREQ_IN_USEC        200
+
+#define MLXBF_I2C_SMBUS_OP_CNT_1   1
+#define MLXBF_I2C_SMBUS_OP_CNT_2   2
+#define MLXBF_I2C_SMBUS_OP_CNT_3   3
+#define MLXBF_I2C_SMBUS_MAX_OP_CNT MLXBF_I2C_SMBUS_OP_CNT_3
+
+/* Helper macro to define an I2C resource parameters. */
+#define MLXBF_I2C_RES_PARAMS(addr, size, str) \
+	{ \
+		.start = (addr), \
+		.end = (addr) + (size) - 1, \
+		.name = (str) \
+	}
+
+enum {
+	MLXBF_I2C_TIMING_100KHZ = 100000,
+	MLXBF_I2C_TIMING_400KHZ = 400000,
+	MLXBF_I2C_TIMING_1000KHZ = 1000000,
+};
+
+enum {
+	MLXBF_I2C_F_READ = BIT(0),
+	MLXBF_I2C_F_WRITE = BIT(1),
+	MLXBF_I2C_F_NORESTART = BIT(3),
+	MLXBF_I2C_F_SMBUS_OPERATION = BIT(4),
+	MLXBF_I2C_F_SMBUS_BLOCK = BIT(5),
+	MLXBF_I2C_F_SMBUS_PEC = BIT(6),
+	MLXBF_I2C_F_SMBUS_PROCESS_CALL = BIT(7),
+};
+
+/* Mellanox BlueField chip type. */
+enum mlxbf_i2c_chip_type {
+	MLXBF_I2C_CHIP_TYPE_1, /* Mellanox BlueField-1 chip. */
+	MLXBF_I2C_CHIP_TYPE_2, /* Mellanox BlueField-2 chip. */
+	MLXBF_I2C_CHIP_TYPE_3 /* Mellanox BlueField-3 chip. */
+};
+
+/* List of chip resources that are being accessed by the driver. */
+enum {
+	MLXBF_I2C_SMBUS_RES,
+	MLXBF_I2C_MST_CAUSE_RES,
+	MLXBF_I2C_SLV_CAUSE_RES,
+	MLXBF_I2C_COALESCE_RES,
+	MLXBF_I2C_SMBUS_TIMER_RES,
+	MLXBF_I2C_SMBUS_MST_RES,
+	MLXBF_I2C_SMBUS_SLV_RES,
+	MLXBF_I2C_COREPLL_RES,
+	MLXBF_I2C_GPIO_RES,
+	MLXBF_I2C_END_RES
+};
+
 /* Encapsulates timing parameters. */
 struct mlxbf_i2c_timings {
 	u16 scl_high;		/* Clock high period. */
@@ -324,27 +378,12 @@ struct mlxbf_i2c_timings {
 	u32 timeout;		/* Detect clock low timeout. */
 };
 
-enum {
-	MLXBF_I2C_F_READ = BIT(0),
-	MLXBF_I2C_F_WRITE = BIT(1),
-	MLXBF_I2C_F_NORESTART = BIT(3),
-	MLXBF_I2C_F_SMBUS_OPERATION = BIT(4),
-	MLXBF_I2C_F_SMBUS_BLOCK = BIT(5),
-	MLXBF_I2C_F_SMBUS_PEC = BIT(6),
-	MLXBF_I2C_F_SMBUS_PROCESS_CALL = BIT(7),
-};
-
 struct mlxbf_i2c_smbus_operation {
 	u32 flags;
 	u32 length; /* Buffer length in bytes. */
 	u8 *buffer;
 };
 
-#define MLXBF_I2C_SMBUS_OP_CNT_1	1
-#define MLXBF_I2C_SMBUS_OP_CNT_2	2
-#define MLXBF_I2C_SMBUS_OP_CNT_3	3
-#define MLXBF_I2C_SMBUS_MAX_OP_CNT	MLXBF_I2C_SMBUS_OP_CNT_3
-
 struct mlxbf_i2c_smbus_request {
 	u8 slave;
 	u8 operation_cnt;
@@ -358,24 +397,38 @@ struct mlxbf_i2c_resource {
 	u8 type;
 };
 
-/* List of chip resources that are being accessed by the driver. */
-enum {
-	MLXBF_I2C_SMBUS_RES,
-	MLXBF_I2C_MST_CAUSE_RES,
-	MLXBF_I2C_SLV_CAUSE_RES,
-	MLXBF_I2C_COALESCE_RES,
-	MLXBF_I2C_COREPLL_RES,
-	MLXBF_I2C_GPIO_RES,
-	MLXBF_I2C_END_RES,
+struct mlxbf_i2c_chip_info {
+	enum mlxbf_i2c_chip_type type;
+	/* Chip shared resources that are being used by the I2C controller. */
+	struct mlxbf_i2c_resource *shared_res[MLXBF_I2C_SHARED_RES_MAX];
+
+	/* Callback to calculate the core PLL frequency. */
+	u64 (*calculate_freq)(struct mlxbf_i2c_resource *corepll_res);
+
+	/* Registers' address offset */
+	u32 smbus_master_rs_bytes_off;
+	u32 smbus_master_fsm_off;
 };
 
-/* Helper macro to define an I2C resource parameters. */
-#define MLXBF_I2C_RES_PARAMS(addr, size, str) \
-	{ \
-		.start = (addr), \
-		.end = (addr) + (size) - 1, \
-		.name = (str) \
-	}
+struct mlxbf_i2c_priv {
+	const struct mlxbf_i2c_chip_info *chip;
+	struct i2c_adapter adap;
+	struct mlxbf_i2c_resource *smbus;
+	struct mlxbf_i2c_resource *timer;
+	struct mlxbf_i2c_resource *mst;
+	struct mlxbf_i2c_resource *slv;
+	struct mlxbf_i2c_resource *mst_cause;
+	struct mlxbf_i2c_resource *slv_cause;
+	struct mlxbf_i2c_resource *coalesce;
+	u64 frequency; /* Core frequency in Hz. */
+	int bus; /* Physical bus identifier. */
+	int irq;
+	struct i2c_client *slave[MLXBF_I2C_SMBUS_SLAVE_ADDR_CNT];
+	u32 resource_version;
+};
+
+/* Core PLL frequency. */
+static u64 mlxbf_i2c_corepll_frequency;
 
 static struct resource mlxbf_i2c_coalesce_tyu_params =
 		MLXBF_I2C_RES_PARAMS(MLXBF_I2C_COALESCE_TYU_ADDR,
@@ -389,6 +442,10 @@ static struct resource mlxbf_i2c_corepll_yu_params =
 		MLXBF_I2C_RES_PARAMS(MLXBF_I2C_COREPLL_YU_ADDR,
 				     MLXBF_I2C_COREPLL_YU_SIZE,
 				     "COREPLL_MEM");
+static struct resource mlxbf_i2c_corepll_rsh_yu_params =
+		MLXBF_I2C_RES_PARAMS(MLXBF_I2C_COREPLL_RSH_YU_ADDR,
+				     MLXBF_I2C_COREPLL_RSH_YU_SIZE,
+				     "COREPLL_MEM");
 static struct resource mlxbf_i2c_gpio_tyu_params =
 		MLXBF_I2C_RES_PARAMS(MLXBF_I2C_GPIO_TYU_ADDR,
 				     MLXBF_I2C_GPIO_TYU_SIZE,
@@ -398,34 +455,6 @@ static struct mutex mlxbf_i2c_coalesce_lock;
 static struct mutex mlxbf_i2c_corepll_lock;
 static struct mutex mlxbf_i2c_gpio_lock;
 
-/* Mellanox BlueField chip type. */
-enum mlxbf_i2c_chip_type {
-	MLXBF_I2C_CHIP_TYPE_1, /* Mellanox BlueField-1 chip. */
-	MLXBF_I2C_CHIP_TYPE_2, /* Mallanox BlueField-2 chip. */
-};
-
-struct mlxbf_i2c_chip_info {
-	enum mlxbf_i2c_chip_type type;
-	/* Chip shared resources that are being used by the I2C controller. */
-	struct mlxbf_i2c_resource *shared_res[MLXBF_I2C_SHARED_RES_MAX];
-
-	/* Callback to calculate the core PLL frequency. */
-	u64 (*calculate_freq)(struct mlxbf_i2c_resource *corepll_res);
-};
-
-struct mlxbf_i2c_priv {
-	const struct mlxbf_i2c_chip_info *chip;
-	struct i2c_adapter adap;
-	struct mlxbf_i2c_resource *smbus;
-	struct mlxbf_i2c_resource *mst_cause;
-	struct mlxbf_i2c_resource *slv_cause;
-	struct mlxbf_i2c_resource *coalesce;
-	u64 frequency; /* Core frequency in Hz. */
-	int bus; /* Physical bus identifier. */
-	int irq;
-	struct i2c_client *slave[MLXBF_I2C_SMBUS_SLAVE_ADDR_CNT];
-};
-
 static struct mlxbf_i2c_resource mlxbf_i2c_coalesce_res[] = {
 	[MLXBF_I2C_CHIP_TYPE_1] = {
 		.params = &mlxbf_i2c_coalesce_tyu_params,
@@ -445,6 +474,11 @@ static struct mlxbf_i2c_resource mlxbf_i2c_corepll_res[] = {
 		.params = &mlxbf_i2c_corepll_yu_params,
 		.lock = &mlxbf_i2c_corepll_lock,
 		.type = MLXBF_I2C_COREPLL_RES,
+	},
+	[MLXBF_I2C_CHIP_TYPE_3] = {
+		.params = &mlxbf_i2c_corepll_rsh_yu_params,
+		.lock = &mlxbf_i2c_corepll_lock,
+		.type = MLXBF_I2C_COREPLL_RES,
 	}
 };
 
@@ -461,24 +495,13 @@ static u8 mlxbf_i2c_bus_count;
 
 static struct mutex mlxbf_i2c_bus_lock;
 
-/* Polling frequency in microseconds. */
-#define MLXBF_I2C_POLL_FREQ_IN_USEC        200
-
-#define MLXBF_I2C_SHIFT_0   0
-#define MLXBF_I2C_SHIFT_8   8
-#define MLXBF_I2C_SHIFT_16  16
-#define MLXBF_I2C_SHIFT_24  24
-
-#define MLXBF_I2C_MASK_8    GENMASK(7, 0)
-#define MLXBF_I2C_MASK_16   GENMASK(15, 0)
-
 /*
  * Function to poll a set of bits at a specific address; it checks whether
  * the bits are equal to zero when eq_zero is set to 'true', and not equal
  * to zero when eq_zero is set to 'false'.
  * Note that the timeout is given in microseconds.
  */
-static u32 mlxbf_smbus_poll(void __iomem *io, u32 addr, u32 mask,
+static u32 mlxbf_i2c_poll(void __iomem *io, u32 addr, u32 mask,
 			    bool eq_zero, u32  timeout)
 {
 	u32 bits;
@@ -500,13 +523,13 @@ static u32 mlxbf_smbus_poll(void __iomem *io, u32 addr, u32 mask,
  * a transaction. Accordingly, this function polls the Master FSM stop
  * bit; it returns false when the bit is asserted, true if not.
  */
-static bool mlxbf_smbus_master_wait_for_idle(struct mlxbf_i2c_priv *priv)
+static bool mlxbf_i2c_smbus_master_wait_for_idle(struct mlxbf_i2c_priv *priv)
 {
 	u32 mask = MLXBF_I2C_SMBUS_MASTER_FSM_STOP_MASK;
-	u32 addr = MLXBF_I2C_SMBUS_MASTER_FSM;
+	u32 addr = priv->chip->smbus_master_fsm_off;
 	u32 timeout = MLXBF_I2C_SMBUS_TIMEOUT;
 
-	if (mlxbf_smbus_poll(priv->smbus->io, addr, mask, true, timeout))
+	if (mlxbf_i2c_poll(priv->mst->io, addr, mask, true, timeout))
 		return true;
 
 	return false;
@@ -517,7 +540,7 @@ static bool mlxbf_smbus_master_wait_for_idle(struct mlxbf_i2c_priv *priv)
  */
 static bool mlxbf_i2c_smbus_master_lock(struct mlxbf_i2c_priv *priv)
 {
-	if (mlxbf_smbus_poll(priv->smbus->io, MLXBF_I2C_SMBUS_MASTER_GW,
+	if (mlxbf_i2c_poll(priv->mst->io, MLXBF_I2C_SMBUS_MASTER_GW,
 			   MLXBF_I2C_MASTER_LOCK_BIT, true,
 			   MLXBF_I2C_SMBUS_LOCK_POLL_TIMEOUT))
 		return true;
@@ -528,7 +551,7 @@ static bool mlxbf_i2c_smbus_master_lock(struct mlxbf_i2c_priv *priv)
 static void mlxbf_i2c_smbus_master_unlock(struct mlxbf_i2c_priv *priv)
 {
 	/* Clear the gw to clear the lock */
-	writel(0, priv->smbus->io + MLXBF_I2C_SMBUS_MASTER_GW);
+	writel(0, priv->mst->io + MLXBF_I2C_SMBUS_MASTER_GW);
 }
 
 static bool mlxbf_i2c_smbus_transaction_success(u32 master_status,
@@ -568,7 +591,7 @@ static int mlxbf_i2c_smbus_check_status(struct mlxbf_i2c_priv *priv)
 	 * then read the cause and master status bits to determine if
 	 * errors occurred during the transaction.
 	 */
-	mlxbf_smbus_poll(priv->smbus->io, MLXBF_I2C_SMBUS_MASTER_GW,
+	mlxbf_i2c_poll(priv->mst->io, MLXBF_I2C_SMBUS_MASTER_GW,
 			 MLXBF_I2C_MASTER_BUSY_BIT, true,
 			 MLXBF_I2C_SMBUS_TIMEOUT);
 
@@ -581,7 +604,7 @@ static int mlxbf_i2c_smbus_check_status(struct mlxbf_i2c_priv *priv)
 	 * Parse both Cause and Master GW bits, then return transaction status.
 	 */
 
-	master_status_bits = readl(priv->smbus->io +
+	master_status_bits = readl(priv->mst->io +
 					MLXBF_I2C_SMBUS_MASTER_STATUS);
 	master_status_bits &= MLXBF_I2C_SMBUS_MASTER_STATUS_MASK;
 
@@ -606,7 +629,8 @@ static int mlxbf_i2c_smbus_check_status(struct mlxbf_i2c_priv *priv)
 }
 
 static void mlxbf_i2c_smbus_write_data(struct mlxbf_i2c_priv *priv,
-				       const u8 *data, u8 length, u32 addr)
+				       const u8 *data, u8 length, u32 addr,
+				       bool is_master)
 {
 	u8 offset, aligned_length;
 	u32 data32;
@@ -623,12 +647,16 @@ static void mlxbf_i2c_smbus_write_data(struct mlxbf_i2c_priv *priv,
 	 */
 	for (offset = 0; offset < aligned_length; offset += sizeof(u32)) {
 		data32 = *((u32 *)(data + offset));
-		iowrite32be(data32, priv->smbus->io + addr + offset);
+		if (is_master)
+			iowrite32be(data32, priv->mst->io + addr + offset);
+		else
+			iowrite32be(data32, priv->slv->io + addr + offset);
 	}
 }
 
 static void mlxbf_i2c_smbus_read_data(struct mlxbf_i2c_priv *priv,
-				      u8 *data, u8 length, u32 addr)
+				      u8 *data, u8 length, u32 addr,
+				      bool is_master)
 {
 	u32 data32, mask;
 	u8 byte, offset;
@@ -644,14 +672,20 @@ static void mlxbf_i2c_smbus_read_data(struct mlxbf_i2c_priv *priv,
 	 */
 
 	for (offset = 0; offset < (length & ~mask); offset += sizeof(u32)) {
-		data32 = ioread32be(priv->smbus->io + addr + offset);
+		if (is_master)
+			data32 = ioread32be(priv->mst->io + addr + offset);
+		else
+			data32 = ioread32be(priv->slv->io + addr + offset);
 		*((u32 *)(data + offset)) = data32;
 	}
 
 	if (!(length & mask))
 		return;
 
-	data32 = ioread32be(priv->smbus->io + addr + offset);
+	if (is_master)
+		data32 = ioread32be(priv->mst->io + addr + offset);
+	else
+		data32 = ioread32be(priv->slv->io + addr + offset);
 
 	for (byte = 0; byte < (length & mask); byte++) {
 		data[offset + byte] = data32 & GENMASK(7, 0);
@@ -677,16 +711,16 @@ static int mlxbf_i2c_smbus_enable(struct mlxbf_i2c_priv *priv, u8 slave,
 	command |= rol32(pec_en, MLXBF_I2C_MASTER_SEND_PEC_SHIFT);
 
 	/* Clear status bits. */
-	writel(0x0, priv->smbus->io + MLXBF_I2C_SMBUS_MASTER_STATUS);
+	writel(0x0, priv->mst->io + MLXBF_I2C_SMBUS_MASTER_STATUS);
 	/* Set the cause data. */
 	writel(~0x0, priv->mst_cause->io + MLXBF_I2C_CAUSE_OR_CLEAR);
 	/* Zero PEC byte. */
-	writel(0x0, priv->smbus->io + MLXBF_I2C_SMBUS_MASTER_PEC);
+	writel(0x0, priv->mst->io + MLXBF_I2C_SMBUS_MASTER_PEC);
 	/* Zero byte count. */
-	writel(0x0, priv->smbus->io + MLXBF_I2C_SMBUS_RS_BYTES);
+	writel(0x0, priv->mst->io + priv->chip->smbus_master_rs_bytes_off);
 
 	/* GW activation. */
-	writel(command, priv->smbus->io + MLXBF_I2C_SMBUS_MASTER_GW);
+	writel(command, priv->mst->io + MLXBF_I2C_SMBUS_MASTER_GW);
 
 	/*
 	 * Poll master status and check status bits. An ACK is sent when
@@ -730,7 +764,7 @@ mlxbf_i2c_smbus_start_transaction(struct mlxbf_i2c_priv *priv,
 		return -EBUSY;
 
 	/* Check whether the HW is idle */
-	if (WARN_ON(!mlxbf_smbus_master_wait_for_idle(priv))) {
+	if (WARN_ON(!mlxbf_i2c_smbus_master_wait_for_idle(priv))) {
 		ret = -EBUSY;
 		goto out_unlock;
 	}
@@ -787,7 +821,7 @@ mlxbf_i2c_smbus_start_transaction(struct mlxbf_i2c_priv *priv,
 	 * must be written to the data registers.
 	 */
 	mlxbf_i2c_smbus_write_data(priv, (const u8 *)data_desc, data_len,
-				   MLXBF_I2C_MASTER_DATA_DESC_ADDR);
+				   MLXBF_I2C_MASTER_DATA_DESC_ADDR, true);
 
 	if (write_en) {
 		ret = mlxbf_i2c_smbus_enable(priv, slave, write_len, block_en,
@@ -799,13 +833,13 @@ mlxbf_i2c_smbus_start_transaction(struct mlxbf_i2c_priv *priv,
 	if (read_en) {
 		/* Write slave address to Master GW data descriptor. */
 		mlxbf_i2c_smbus_write_data(priv, (const u8 *)&addr, 1,
-					   MLXBF_I2C_MASTER_DATA_DESC_ADDR);
+					   MLXBF_I2C_MASTER_DATA_DESC_ADDR, true);
 		ret = mlxbf_i2c_smbus_enable(priv, slave, read_len, block_en,
 					 pec_en, 1);
 		if (!ret) {
 			/* Get Master GW data descriptor. */
 			mlxbf_i2c_smbus_read_data(priv, data_desc, read_len + 1,
-					     MLXBF_I2C_MASTER_DATA_DESC_ADDR);
+					     MLXBF_I2C_MASTER_DATA_DESC_ADDR, true);
 
 			/* Get data from Master GW data descriptor. */
 			memcpy(read_buf, data_desc, read_len + 1);
@@ -817,7 +851,7 @@ mlxbf_i2c_smbus_start_transaction(struct mlxbf_i2c_priv *priv,
 		 * next tag integration.
 		 */
 		writel(MLXBF_I2C_SMBUS_MASTER_FSM_PS_STATE_MASK,
-			priv->smbus->io + MLXBF_I2C_SMBUS_MASTER_FSM);
+			priv->mst->io + priv->chip->smbus_master_fsm_off);
 	}
 
 out_unlock:
@@ -1109,7 +1143,7 @@ static void mlxbf_i2c_set_timings(struct mlxbf_i2c_priv *priv,
 	timer |= mlxbf_i2c_set_timer(priv, timings->scl_low,
 				     false, MLXBF_I2C_MASK_16,
 				     MLXBF_I2C_SHIFT_16);
-	writel(timer, priv->smbus->io +
+	writel(timer, priv->timer->io +
 		MLXBF_I2C_SMBUS_TIMER_SCL_LOW_SCL_HIGH);
 
 	timer = mlxbf_i2c_set_timer(priv, timings->sda_rise, false,
@@ -1120,34 +1154,34 @@ static void mlxbf_i2c_set_timings(struct mlxbf_i2c_priv *priv,
 				     MLXBF_I2C_MASK_8, MLXBF_I2C_SHIFT_16);
 	timer |= mlxbf_i2c_set_timer(priv, timings->scl_fall, false,
 				     MLXBF_I2C_MASK_8, MLXBF_I2C_SHIFT_24);
-	writel(timer, priv->smbus->io +
+	writel(timer, priv->timer->io +
 		MLXBF_I2C_SMBUS_TIMER_FALL_RISE_SPIKE);
 
 	timer = mlxbf_i2c_set_timer(priv, timings->hold_start, true,
 				    MLXBF_I2C_MASK_16, MLXBF_I2C_SHIFT_0);
 	timer |= mlxbf_i2c_set_timer(priv, timings->hold_data, true,
 				     MLXBF_I2C_MASK_16, MLXBF_I2C_SHIFT_16);
-	writel(timer, priv->smbus->io + MLXBF_I2C_SMBUS_TIMER_THOLD);
+	writel(timer, priv->timer->io + MLXBF_I2C_SMBUS_TIMER_THOLD);
 
 	timer = mlxbf_i2c_set_timer(priv, timings->setup_start, true,
 				    MLXBF_I2C_MASK_16, MLXBF_I2C_SHIFT_0);
 	timer |= mlxbf_i2c_set_timer(priv, timings->setup_stop, true,
 				     MLXBF_I2C_MASK_16, MLXBF_I2C_SHIFT_16);
-	writel(timer, priv->smbus->io +
+	writel(timer, priv->timer->io +
 		MLXBF_I2C_SMBUS_TIMER_TSETUP_START_STOP);
 
 	timer = mlxbf_i2c_set_timer(priv, timings->setup_data, true,
 				    MLXBF_I2C_MASK_16, MLXBF_I2C_SHIFT_0);
-	writel(timer, priv->smbus->io + MLXBF_I2C_SMBUS_TIMER_TSETUP_DATA);
+	writel(timer, priv->timer->io + MLXBF_I2C_SMBUS_TIMER_TSETUP_DATA);
 
 	timer = mlxbf_i2c_set_timer(priv, timings->buf, false,
 				    MLXBF_I2C_MASK_16, MLXBF_I2C_SHIFT_0);
 	timer |= mlxbf_i2c_set_timer(priv, timings->thigh_max, false,
 				     MLXBF_I2C_MASK_16, MLXBF_I2C_SHIFT_16);
-	writel(timer, priv->smbus->io + MLXBF_I2C_SMBUS_THIGH_MAX_TBUF);
+	writel(timer, priv->timer->io + MLXBF_I2C_SMBUS_THIGH_MAX_TBUF);
 
 	timer = timings->timeout;
-	writel(timer, priv->smbus->io + MLXBF_I2C_SMBUS_SCL_LOW_TIMEOUT);
+	writel(timer, priv->timer->io + MLXBF_I2C_SMBUS_SCL_LOW_TIMEOUT);
 }
 
 enum mlxbf_i2c_timings_config {
@@ -1559,7 +1593,7 @@ static int mlxbf_i2c_slave_enable(struct mlxbf_i2c_priv *priv,
 	 * Look for the next available slave register slot.
 	 */
 	for (reg = 0; reg < reg_cnt; reg++) {
-		slave_reg = readl(priv->smbus->io +
+		slave_reg = readl(priv->slv->io +
 				MLXBF_I2C_SMBUS_SLAVE_ADDR_CFG + reg * 0x4);
 		/*
 		 * Each register holds 4 slave addresses. So, we have to keep
@@ -1581,7 +1615,7 @@ static int mlxbf_i2c_slave_enable(struct mlxbf_i2c_priv *priv,
 				slave_reg &= ~(MLXBF_I2C_SMBUS_SLAVE_ADDR_MASK << (byte * 8));
 				slave_reg |= (slave->addr << (byte * 8));
 				slave_reg |= MLXBF_I2C_SMBUS_SLAVE_ADDR_EN_BIT << (byte * 8);
-				writel(slave_reg, priv->smbus->io +
+				writel(slave_reg, priv->slv->io +
 					MLXBF_I2C_SMBUS_SLAVE_ADDR_CFG +
 					(reg * 0x4));
 
@@ -1616,7 +1650,7 @@ static int mlxbf_i2c_slave_disable(struct mlxbf_i2c_priv *priv, u8 addr)
 	 * Check if addr is present in the registers.
 	 */
 	for (reg = 0; reg < reg_cnt; reg++) {
-		slave_reg = readl(priv->smbus->io +
+		slave_reg = readl(priv->slv->io +
 				MLXBF_I2C_SMBUS_SLAVE_ADDR_CFG + reg * 0x4);
 
 		/* Check whether the address slots are empty. */
@@ -1637,7 +1671,7 @@ static int mlxbf_i2c_slave_disable(struct mlxbf_i2c_priv *priv, u8 addr)
 			if (addr_tmp == addr) {
 				/* Clear the slave address slot. */
 				slave_reg &= ~(GENMASK(7, 0) << (byte * 8));
-				writel(slave_reg, priv->smbus->io +
+				writel(slave_reg, priv->slv->io +
 					MLXBF_I2C_SMBUS_SLAVE_ADDR_CFG +
 					(reg * 0x4));
 				/* Free slave at the corresponding index */
@@ -1741,7 +1775,7 @@ static int mlxbf_i2c_init_slave(struct platform_device *pdev,
 	int ret;
 
 	/* Reset FSM. */
-	writel(0, priv->smbus->io + MLXBF_I2C_SMBUS_SLAVE_FSM);
+	writel(0, priv->slv->io + MLXBF_I2C_SMBUS_SLAVE_FSM);
 
 	/*
 	 * Enable slave cause interrupt bits. Drive
@@ -1756,7 +1790,7 @@ static int mlxbf_i2c_init_slave(struct platform_device *pdev,
 	writel(int_reg, priv->slv_cause->io + MLXBF_I2C_CAUSE_OR_EVTEN0);
 
 	/* Finally, set the 'ready' bit to start handling transactions. */
-	writel(0x1, priv->smbus->io + MLXBF_I2C_SMBUS_SLAVE_READY);
+	writel(0x1, priv->slv->io + MLXBF_I2C_SMBUS_SLAVE_READY);
 
 	/* Initialize the cause coalesce resource. */
 	ret = mlxbf_i2c_init_coalesce(pdev, priv);
@@ -1801,13 +1835,13 @@ static bool mlxbf_i2c_has_coalesce(struct mlxbf_i2c_priv *priv, bool *read,
 	return true;
 }
 
-static bool mlxbf_smbus_slave_wait_for_idle(struct mlxbf_i2c_priv *priv,
+static bool mlxbf_i2c_slave_wait_for_idle(struct mlxbf_i2c_priv *priv,
 					    u32 timeout)
 {
 	u32 mask = MLXBF_I2C_CAUSE_S_GW_BUSY_FALL;
 	u32 addr = MLXBF_I2C_CAUSE_ARBITER;
 
-	if (mlxbf_smbus_poll(priv->slv_cause->io, addr, mask, false, timeout))
+	if (mlxbf_i2c_poll(priv->slv_cause->io, addr, mask, false, timeout))
 		return true;
 
 	return false;
@@ -1846,7 +1880,7 @@ static int mlxbf_i2c_irq_send(struct mlxbf_i2c_priv *priv, u8 recv_bytes)
 	 * determine the slave address. This byte is located in the
 	 * first data descriptor register of the slave GW.
 	 */
-	data32 = ioread32be(priv->smbus->io +
+	data32 = ioread32be(priv->slv->io +
 				MLXBF_I2C_SLAVE_DATA_DESC_ADDR);
 	addr = (data32 & GENMASK(7, 0)) >> 1;
 
@@ -1900,7 +1934,7 @@ static int mlxbf_i2c_irq_send(struct mlxbf_i2c_priv *priv, u8 recv_bytes)
 
 	/* Write data to Slave GW data descriptor. */
 	mlxbf_i2c_smbus_write_data(priv, data_desc, byte_cnt,
-				   MLXBF_I2C_SLAVE_DATA_DESC_ADDR);
+				   MLXBF_I2C_SLAVE_DATA_DESC_ADDR, false);
 
 	pec_en = 0; /* Disable PEC since it is not supported. */
 
@@ -1909,19 +1943,19 @@ static int mlxbf_i2c_irq_send(struct mlxbf_i2c_priv *priv, u8 recv_bytes)
 	control32 |= rol32(write_size, MLXBF_I2C_SLAVE_WRITE_BYTES_SHIFT);
 	control32 |= rol32(pec_en, MLXBF_I2C_SLAVE_SEND_PEC_SHIFT);
 
-	writel(control32, priv->smbus->io + MLXBF_I2C_SMBUS_SLAVE_GW);
+	writel(control32, priv->slv->io + MLXBF_I2C_SMBUS_SLAVE_GW);
 
 	/*
 	 * Wait until the transfer is completed; the driver will wait
 	 * until the GW is idle, a cause will rise on fall of GW busy.
 	 */
-	mlxbf_smbus_slave_wait_for_idle(priv, MLXBF_I2C_SMBUS_TIMEOUT);
+	mlxbf_i2c_slave_wait_for_idle(priv, MLXBF_I2C_SMBUS_TIMEOUT);
 
 clear_csr:
 	/* Release the Slave GW. */
-	writel(0x0, priv->smbus->io + MLXBF_I2C_SMBUS_SLAVE_RS_MASTER_BYTES);
-	writel(0x0, priv->smbus->io + MLXBF_I2C_SMBUS_SLAVE_PEC);
-	writel(0x1, priv->smbus->io + MLXBF_I2C_SMBUS_SLAVE_READY);
+	writel(0x0, priv->slv->io + MLXBF_I2C_SMBUS_SLAVE_RS_MASTER_BYTES);
+	writel(0x0, priv->slv->io + MLXBF_I2C_SMBUS_SLAVE_PEC);
+	writel(0x1, priv->slv->io + MLXBF_I2C_SMBUS_SLAVE_READY);
 
 	return ret;
 }
@@ -1939,7 +1973,7 @@ static int mlxbf_i2c_irq_recv(struct mlxbf_i2c_priv *priv, u8 recv_bytes)
 
 	/* Read data from Slave GW data descriptor. */
 	mlxbf_i2c_smbus_read_data(priv, data_desc, recv_bytes,
-				  MLXBF_I2C_SLAVE_DATA_DESC_ADDR);
+				  MLXBF_I2C_SLAVE_DATA_DESC_ADDR, false);
 	addr = data_desc[0] >> 1;
 
 	/*
@@ -1975,9 +2009,9 @@ static int mlxbf_i2c_irq_recv(struct mlxbf_i2c_priv *priv, u8 recv_bytes)
 
 clear_csr:
 	/* Release the Slave GW. */
-	writel(0x0, priv->smbus->io + MLXBF_I2C_SMBUS_SLAVE_RS_MASTER_BYTES);
-	writel(0x0, priv->smbus->io + MLXBF_I2C_SMBUS_SLAVE_PEC);
-	writel(0x1, priv->smbus->io + MLXBF_I2C_SMBUS_SLAVE_READY);
+	writel(0x0, priv->slv->io + MLXBF_I2C_SMBUS_SLAVE_RS_MASTER_BYTES);
+	writel(0x0, priv->slv->io + MLXBF_I2C_SMBUS_SLAVE_PEC);
+	writel(0x1, priv->slv->io + MLXBF_I2C_SMBUS_SLAVE_READY);
 
 	return ret;
 }
@@ -2012,7 +2046,7 @@ static irqreturn_t mlxbf_i2c_irq(int irq, void *ptr)
 	 * slave, if the higher 8 bits are sent then the slave expect N bytes
 	 * from the master.
 	 */
-	rw_bytes_reg = readl(priv->smbus->io +
+	rw_bytes_reg = readl(priv->slv->io +
 				MLXBF_I2C_SMBUS_SLAVE_RS_MASTER_BYTES);
 	recv_bytes = (rw_bytes_reg >> 8) & GENMASK(7, 0);
 
@@ -2177,14 +2211,27 @@ static struct mlxbf_i2c_chip_info mlxbf_i2c_chip[] = {
 			[1] = &mlxbf_i2c_corepll_res[MLXBF_I2C_CHIP_TYPE_1],
 			[2] = &mlxbf_i2c_gpio_res[MLXBF_I2C_CHIP_TYPE_1]
 		},
-		.calculate_freq = mlxbf_i2c_calculate_freq_from_tyu
+		.calculate_freq = mlxbf_i2c_calculate_freq_from_tyu,
+		.smbus_master_rs_bytes_off = MLXBF_I2C_YU_SMBUS_RS_BYTES,
+		.smbus_master_fsm_off = MLXBF_I2C_YU_SMBUS_MASTER_FSM
 	},
 	[MLXBF_I2C_CHIP_TYPE_2] = {
 		.type = MLXBF_I2C_CHIP_TYPE_2,
 		.shared_res = {
 			[0] = &mlxbf_i2c_corepll_res[MLXBF_I2C_CHIP_TYPE_2]
 		},
-		.calculate_freq = mlxbf_i2c_calculate_freq_from_yu
+		.calculate_freq = mlxbf_i2c_calculate_freq_from_yu,
+		.smbus_master_rs_bytes_off = MLXBF_I2C_YU_SMBUS_RS_BYTES,
+		.smbus_master_fsm_off = MLXBF_I2C_YU_SMBUS_MASTER_FSM
+	},
+	[MLXBF_I2C_CHIP_TYPE_3] = {
+		.type = MLXBF_I2C_CHIP_TYPE_3,
+		.shared_res = {
+			[0] = &mlxbf_i2c_corepll_res[MLXBF_I2C_CHIP_TYPE_3]
+		},
+		.calculate_freq = mlxbf_i2c_calculate_freq_from_yu,
+		.smbus_master_rs_bytes_off = MLXBF_I2C_RSH_YU_SMBUS_RS_BYTES,
+		.smbus_master_fsm_off = MLXBF_I2C_RSH_YU_SMBUS_MASTER_FSM
 	}
 };
 
@@ -2209,6 +2256,10 @@ static const struct of_device_id mlxbf_i2c_dt_ids[] = {
 		.compatible = "mellanox,i2c-mlxbf2",
 		.data = &mlxbf_i2c_chip[MLXBF_I2C_CHIP_TYPE_2]
 	},
+	{
+		.compatible = "mellanox,i2c-mlxbf3",
+		.data = &mlxbf_i2c_chip[MLXBF_I2C_CHIP_TYPE_3]
+	},
 	{},
 };
 
@@ -2218,6 +2269,7 @@ MODULE_DEVICE_TABLE(of, mlxbf_i2c_dt_ids);
 static const struct acpi_device_id mlxbf_i2c_acpi_ids[] = {
 	{ "MLNXBF03", (kernel_ulong_t)&mlxbf_i2c_chip[MLXBF_I2C_CHIP_TYPE_1] },
 	{ "MLNXBF23", (kernel_ulong_t)&mlxbf_i2c_chip[MLXBF_I2C_CHIP_TYPE_2] },
+	{ "MLNXBF31", (kernel_ulong_t)&mlxbf_i2c_chip[MLXBF_I2C_CHIP_TYPE_3] },
 	{},
 };
 
@@ -2293,6 +2345,7 @@ static int mlxbf_i2c_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct mlxbf_i2c_priv *priv;
 	struct i2c_adapter *adap;
+	u32 resource_version;
 	int irq, ret;
 
 	priv = devm_kzalloc(dev, sizeof(struct mlxbf_i2c_priv), GFP_KERNEL);
@@ -2306,11 +2359,60 @@ static int mlxbf_i2c_probe(struct platform_device *pdev)
 	if (ret < 0)
 		return ret;
 
-	ret = mlxbf_i2c_init_resource(pdev, &priv->smbus,
-				      MLXBF_I2C_SMBUS_RES);
-	if (ret < 0) {
-		dev_err(dev, "Cannot fetch smbus resource info");
-		return ret;
+	/* This property allows the driver to stay backward compatible with older
+	 * ACPI table and device trees versions.
+	 * Starting BlueField-3 SoC, the "smbus" resource was broken down into 3
+	 * separate resources "timer", "master" and "slave".
+	 */
+	if (device_property_read_u32(dev, "resource_version", &resource_version))
+		resource_version = 0;
+
+	priv->resource_version = resource_version;
+
+	if (priv->chip->type < MLXBF_I2C_CHIP_TYPE_3 && resource_version == 0) {
+		priv->timer = devm_kzalloc(dev, sizeof(struct mlxbf_i2c_resource), GFP_KERNEL);
+		if (!priv->timer)
+			return -ENOMEM;
+
+		priv->mst = devm_kzalloc(dev, sizeof(struct mlxbf_i2c_resource), GFP_KERNEL);
+		if (!priv->mst)
+			return -ENOMEM;
+
+		priv->slv = devm_kzalloc(dev, sizeof(struct mlxbf_i2c_resource), GFP_KERNEL);
+		if (!priv->slv)
+			return -ENOMEM;
+
+		ret = mlxbf_i2c_init_resource(pdev, &priv->smbus,
+					      MLXBF_I2C_SMBUS_RES);
+		if (ret < 0) {
+			dev_err(dev, "Cannot fetch smbus resource info");
+			return ret;
+		}
+
+		priv->timer->io = priv->smbus->io;
+		priv->mst->io = priv->smbus->io + MLXBF_I2C_MST_ADDR_OFFSET;
+		priv->slv->io = priv->smbus->io + MLXBF_I2C_SLV_ADDR_OFFSET;
+	} else {
+		ret = mlxbf_i2c_init_resource(pdev, &priv->timer,
+					      MLXBF_I2C_SMBUS_TIMER_RES);
+		if (ret < 0) {
+			dev_err(dev, "Cannot fetch timer resource info");
+			return ret;
+		}
+
+		ret = mlxbf_i2c_init_resource(pdev, &priv->mst,
+					      MLXBF_I2C_SMBUS_MST_RES);
+		if (ret < 0) {
+			dev_err(dev, "Cannot fetch master resource info");
+			return ret;
+		}
+
+		ret = mlxbf_i2c_init_resource(pdev, &priv->slv,
+					      MLXBF_I2C_SMBUS_SLV_RES);
+		if (ret < 0) {
+			dev_err(dev, "Cannot fetch slave resource info");
+			return ret;
+		}
 	}
 
 	ret = mlxbf_i2c_init_resource(pdev, &priv->mst_cause,
@@ -2398,8 +2500,19 @@ static int mlxbf_i2c_remove(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct resource *params;
 
-	params = priv->smbus->params;
-	devm_release_mem_region(dev, params->start, resource_size(params));
+	if (priv->chip->type < MLXBF_I2C_CHIP_TYPE_3 && priv->resource_version == 0) {
+		params = priv->smbus->params;
+		devm_release_mem_region(dev, params->start, resource_size(params));
+	} else {
+		params = priv->timer->params;
+		devm_release_mem_region(dev, params->start, resource_size(params));
+
+		params = priv->mst->params;
+		devm_release_mem_region(dev, params->start, resource_size(params));
+
+		params = priv->slv->params;
+		devm_release_mem_region(dev, params->start, resource_size(params));
+	}
 
 	params = priv->mst_cause->params;
 	devm_release_mem_region(dev, params->start, resource_size(params));