Moving the register definitions to a global header file include/linux/designware_i2c.h. That removes the need to duplicate them in the adaptation layers for this driver outside of drivers/i2c/busses/. There is at least one of those in drivers/gpu/drm/xe/xe_i2c.c.
Suggested-by: Andy Shevchenko <[email protected]> Suggested-by: Raag Jadav <[email protected]> Reviewed-by: Raag Jadav <[email protected]> Reviewed-by: Mika Westerberg <[email protected]> Signed-off-by: Heikki Krogerus <[email protected]> --- MAINTAINERS | 1 + drivers/i2c/busses/i2c-designware-common.c | 1 + drivers/i2c/busses/i2c-designware-core.h | 84 +--------------- drivers/i2c/busses/i2c-designware-master.c | 1 + include/linux/designware_i2c.h | 107 +++++++++++++++++++++ 5 files changed, 111 insertions(+), 83 deletions(-) create mode 100644 include/linux/designware_i2c.h diff --git a/MAINTAINERS b/MAINTAINERS index 4f176bcaa09e4..ca1dd05e79c65 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -25947,6 +25947,7 @@ R: Andy Shevchenko <[email protected]> L: [email protected] S: Supported F: drivers/i2c/busses/i2c-designware-* +F: include/linux/designware_i2c.h SYNOPSYS DESIGNWARE I2C DRIVER - AMDISP M: Nirujogi Pratap <[email protected]> diff --git a/drivers/i2c/busses/i2c-designware-common.c b/drivers/i2c/busses/i2c-designware-common.c index 4dc57fd561703..1e5aba28e4942 100644 --- a/drivers/i2c/busses/i2c-designware-common.c +++ b/drivers/i2c/busses/i2c-designware-common.c @@ -16,6 +16,7 @@ #include <linux/clk.h> #include <linux/delay.h> #include <linux/device.h> +#include <linux/designware_i2c.h> #include <linux/err.h> #include <linux/errno.h> #include <linux/export.h> diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h index 9d8d104cc3911..dfb6aa41e3f4a 100644 --- a/drivers/i2c/busses/i2c-designware-core.h +++ b/drivers/i2c/busses/i2c-designware-core.h @@ -11,6 +11,7 @@ #include <linux/bits.h> #include <linux/completion.h> +#include <linux/designware_i2c.h> #include <linux/errno.h> #include <linux/i2c.h> #include <linux/irqreturn.h> @@ -25,23 +26,6 @@ I2C_FUNC_SMBUS_BLOCK_DATA | \ I2C_FUNC_SMBUS_I2C_BLOCK) -#define DW_IC_CON_MASTER BIT(0) -#define DW_IC_CON_SPEED_STD (1 << 1) -#define DW_IC_CON_SPEED_FAST (2 << 1) -#define DW_IC_CON_SPEED_HIGH (3 << 1) -#define DW_IC_CON_SPEED_MASK GENMASK(2, 1) -#define DW_IC_CON_10BITADDR_SLAVE BIT(3) -#define DW_IC_CON_10BITADDR_MASTER BIT(4) -#define DW_IC_CON_RESTART_EN BIT(5) -#define DW_IC_CON_SLAVE_DISABLE BIT(6) -#define DW_IC_CON_STOP_DET_IFADDRESSED BIT(7) -#define DW_IC_CON_TX_EMPTY_CTRL BIT(8) -#define DW_IC_CON_RX_FIFO_FULL_HLD_CTRL BIT(9) -#define DW_IC_CON_BUS_CLEAR_CTRL BIT(11) - -#define DW_IC_DATA_CMD_DAT GENMASK(7, 0) -#define DW_IC_DATA_CMD_FIRST_DATA_BYTE BIT(11) - /* * Register access parameters */ @@ -55,65 +39,9 @@ #define DW_IC_FIFO_RX_FIELD GENMASK(15, 8) #define DW_IC_FIFO_MIN_DEPTH 2 -/* - * Registers offset - */ -#define DW_IC_CON 0x00 -#define DW_IC_TAR 0x04 -#define DW_IC_SAR 0x08 -#define DW_IC_DATA_CMD 0x10 -#define DW_IC_SS_SCL_HCNT 0x14 -#define DW_IC_SS_SCL_LCNT 0x18 -#define DW_IC_FS_SCL_HCNT 0x1c -#define DW_IC_FS_SCL_LCNT 0x20 -#define DW_IC_HS_SCL_HCNT 0x24 -#define DW_IC_HS_SCL_LCNT 0x28 -#define DW_IC_INTR_STAT 0x2c -#define DW_IC_INTR_MASK 0x30 -#define DW_IC_RAW_INTR_STAT 0x34 -#define DW_IC_RX_TL 0x38 -#define DW_IC_TX_TL 0x3c -#define DW_IC_CLR_INTR 0x40 -#define DW_IC_CLR_RX_UNDER 0x44 -#define DW_IC_CLR_RX_OVER 0x48 -#define DW_IC_CLR_TX_OVER 0x4c -#define DW_IC_CLR_RD_REQ 0x50 -#define DW_IC_CLR_TX_ABRT 0x54 -#define DW_IC_CLR_RX_DONE 0x58 -#define DW_IC_CLR_ACTIVITY 0x5c -#define DW_IC_CLR_STOP_DET 0x60 -#define DW_IC_CLR_START_DET 0x64 -#define DW_IC_CLR_GEN_CALL 0x68 -#define DW_IC_ENABLE 0x6c -#define DW_IC_STATUS 0x70 -#define DW_IC_TXFLR 0x74 -#define DW_IC_RXFLR 0x78 -#define DW_IC_SDA_HOLD 0x7c -#define DW_IC_TX_ABRT_SOURCE 0x80 -#define DW_IC_ENABLE_STATUS 0x9c -#define DW_IC_CLR_RESTART_DET 0xa8 -#define DW_IC_SMBUS_INTR_MASK 0xcc -#define DW_IC_COMP_PARAM_1 0xf4 -#define DW_IC_COMP_VERSION 0xf8 #define DW_IC_SDA_HOLD_MIN_VERS 0x3131312A /* "111*" == v1.11* */ -#define DW_IC_COMP_TYPE 0xfc #define DW_IC_COMP_TYPE_VALUE 0x44570140 /* "DW" + 0x0140 */ -#define DW_IC_INTR_RX_UNDER BIT(0) -#define DW_IC_INTR_RX_OVER BIT(1) -#define DW_IC_INTR_RX_FULL BIT(2) -#define DW_IC_INTR_TX_OVER BIT(3) -#define DW_IC_INTR_TX_EMPTY BIT(4) -#define DW_IC_INTR_RD_REQ BIT(5) -#define DW_IC_INTR_TX_ABRT BIT(6) -#define DW_IC_INTR_RX_DONE BIT(7) -#define DW_IC_INTR_ACTIVITY BIT(8) -#define DW_IC_INTR_STOP_DET BIT(9) -#define DW_IC_INTR_START_DET BIT(10) -#define DW_IC_INTR_GEN_CALL BIT(11) -#define DW_IC_INTR_RESTART_DET BIT(12) -#define DW_IC_INTR_MST_ON_HOLD BIT(13) - #define DW_IC_INTR_DEFAULT_MASK (DW_IC_INTR_RX_FULL | \ DW_IC_INTR_TX_ABRT | \ DW_IC_INTR_STOP_DET) @@ -123,16 +51,6 @@ DW_IC_INTR_RX_UNDER | \ DW_IC_INTR_RD_REQ) -#define DW_IC_ENABLE_ENABLE BIT(0) -#define DW_IC_ENABLE_ABORT BIT(1) - -#define DW_IC_STATUS_ACTIVITY BIT(0) -#define DW_IC_STATUS_TFE BIT(2) -#define DW_IC_STATUS_RFNE BIT(3) -#define DW_IC_STATUS_MASTER_ACTIVITY BIT(5) -#define DW_IC_STATUS_SLAVE_ACTIVITY BIT(6) -#define DW_IC_STATUS_MASTER_HOLD_TX_FIFO_EMPTY BIT(7) - #define DW_IC_SDA_HOLD_RX_SHIFT 16 #define DW_IC_SDA_HOLD_RX_MASK GENMASK(23, 16) diff --git a/drivers/i2c/busses/i2c-designware-master.c b/drivers/i2c/busses/i2c-designware-master.c index de929b91d5ead..3b113df0f28e0 100644 --- a/drivers/i2c/busses/i2c-designware-master.c +++ b/drivers/i2c/busses/i2c-designware-master.c @@ -12,6 +12,7 @@ #define DEFAULT_SYMBOL_NAMESPACE "I2C_DW" #include <linux/delay.h> +#include <linux/designware_i2c.h> #include <linux/err.h> #include <linux/errno.h> #include <linux/export.h> diff --git a/include/linux/designware_i2c.h b/include/linux/designware_i2c.h new file mode 100644 index 0000000000000..53f37f18a7229 --- /dev/null +++ b/include/linux/designware_i2c.h @@ -0,0 +1,107 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Synopsys DesignWare I2C register definitions + * + * Copyright (C) 2026, Intel Corporation + */ + +#ifndef __LINUX_DESIGNWARE_I2C_H +#define __LINUX_DESIGNWARE_I2C_H + +#include <linux/bits.h> + +/* + * Registers offset + */ +#define DW_IC_CON 0x00 +#define DW_IC_TAR 0x04 +#define DW_IC_SAR 0x08 +#define DW_IC_DATA_CMD 0x10 +#define DW_IC_SS_SCL_HCNT 0x14 +#define DW_IC_SS_SCL_LCNT 0x18 +#define DW_IC_FS_SCL_HCNT 0x1c +#define DW_IC_FS_SCL_LCNT 0x20 +#define DW_IC_HS_SCL_HCNT 0x24 +#define DW_IC_HS_SCL_LCNT 0x28 +#define DW_IC_INTR_STAT 0x2c +#define DW_IC_INTR_MASK 0x30 +#define DW_IC_RAW_INTR_STAT 0x34 +#define DW_IC_RX_TL 0x38 +#define DW_IC_TX_TL 0x3c +#define DW_IC_CLR_INTR 0x40 +#define DW_IC_CLR_RX_UNDER 0x44 +#define DW_IC_CLR_RX_OVER 0x48 +#define DW_IC_CLR_TX_OVER 0x4c +#define DW_IC_CLR_RD_REQ 0x50 +#define DW_IC_CLR_TX_ABRT 0x54 +#define DW_IC_CLR_RX_DONE 0x58 +#define DW_IC_CLR_ACTIVITY 0x5c +#define DW_IC_CLR_STOP_DET 0x60 +#define DW_IC_CLR_START_DET 0x64 +#define DW_IC_CLR_GEN_CALL 0x68 +#define DW_IC_ENABLE 0x6c +#define DW_IC_STATUS 0x70 +#define DW_IC_TXFLR 0x74 +#define DW_IC_RXFLR 0x78 +#define DW_IC_SDA_HOLD 0x7c +#define DW_IC_TX_ABRT_SOURCE 0x80 +#define DW_IC_ENABLE_STATUS 0x9c +#define DW_IC_CLR_RESTART_DET 0xa8 +#define DW_IC_SMBUS_INTR_STAT 0xc8 +#define DW_IC_SMBUS_INTR_MASK 0xcc +#define DW_IC_CLR_SMBUS_INTR 0xd4 +#define DW_IC_COMP_PARAM_1 0xf4 +#define DW_IC_COMP_VERSION 0xf8 +#define DW_IC_COMP_TYPE 0xfc + +/* DW_IC_CON bits */ +#define DW_IC_CON_MASTER BIT(0) +#define DW_IC_CON_SPEED_STD (1 << 1) +#define DW_IC_CON_SPEED_FAST (2 << 1) +#define DW_IC_CON_SPEED_HIGH (3 << 1) +#define DW_IC_CON_SPEED_MASK GENMASK(2, 1) +#define DW_IC_CON_10BITADDR_SLAVE BIT(3) +#define DW_IC_CON_10BITADDR_MASTER BIT(4) +#define DW_IC_CON_RESTART_EN BIT(5) +#define DW_IC_CON_SLAVE_DISABLE BIT(6) +#define DW_IC_CON_STOP_DET_IFADDRESSED BIT(7) +#define DW_IC_CON_TX_EMPTY_CTRL BIT(8) +#define DW_IC_CON_RX_FIFO_FULL_HLD_CTRL BIT(9) +#define DW_IC_CON_BUS_CLEAR_CTRL BIT(11) + +/* DW_IC_DATA_CMD bits */ +#define DW_IC_DATA_CMD_DAT GENMASK(7, 0) +#define DW_IC_DATA_CMD_FIRST_DATA_BYTE BIT(11) + +/* DW_IC_INTR_* bits */ +#define DW_IC_INTR_RX_UNDER BIT(0) +#define DW_IC_INTR_RX_OVER BIT(1) +#define DW_IC_INTR_RX_FULL BIT(2) +#define DW_IC_INTR_TX_OVER BIT(3) +#define DW_IC_INTR_TX_EMPTY BIT(4) +#define DW_IC_INTR_RD_REQ BIT(5) +#define DW_IC_INTR_TX_ABRT BIT(6) +#define DW_IC_INTR_RX_DONE BIT(7) +#define DW_IC_INTR_ACTIVITY BIT(8) +#define DW_IC_INTR_STOP_DET BIT(9) +#define DW_IC_INTR_START_DET BIT(10) +#define DW_IC_INTR_GEN_CALL BIT(11) +#define DW_IC_INTR_RESTART_DET BIT(12) +#define DW_IC_INTR_MST_ON_HOLD BIT(13) + +/* DW_IC_ENABLE bits */ +#define DW_IC_ENABLE_ENABLE BIT(0) +#define DW_IC_ENABLE_ABORT BIT(1) + +/* DW_IC_STATUS bits */ +#define DW_IC_STATUS_ACTIVITY BIT(0) +#define DW_IC_STATUS_TFE BIT(2) +#define DW_IC_STATUS_RFNE BIT(3) +#define DW_IC_STATUS_MASTER_ACTIVITY BIT(5) +#define DW_IC_STATUS_SLAVE_ACTIVITY BIT(6) +#define DW_IC_STATUS_MASTER_HOLD_TX_FIFO_EMPTY BIT(7) + +/* DW_IC_SMBUS_INTR_* bits */ +#define DW_IC_SMBUS_INTR_ALERT BIT(10) + +#endif /* __LINUX_DESIGNWARE_I2C_H */ -- 2.50.1
