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From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
To: "Matthew Brost" <matthew.brost@intel.com>,
	"Thomas Hellström" <thomas.hellstrom@linux.intel.com>,
	"Rodrigo Vivi" <rodrigo.vivi@intel.com>,
	"Raag Jadav" <raag.jadav@intel.com>,
	"Mika Westerberg" <mika.westerberg@linux.intel.com>,
	"Andy Shevchenko" <andriy.shevchenko@linux.intel.com>
Cc: Andi Shyti <andi.shyti@kernel.org>,
	Ramesh Babu B <ramesh.babu.b@intel.com>,
	"Michael J. Ruhl" <michael.j.ruhl@intel.com>,
	linux-kernel@vger.kernel.org, intel-xe@lists.freedesktop.org,
	stable@vger.kernel.org
Subject: [PATCH v5 1/3] i2c: designware: Global register definitions
Date: Wed, 15 Jul 2026 17:31:51 +0200	[thread overview]
Message-ID: <20260715153153.1243751-2-heikki.krogerus@linux.intel.com> (raw)
In-Reply-To: <20260715153153.1243751-1-heikki.krogerus@linux.intel.com>

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 <andriy.shevchenko@linux.intel.com>
Suggested-by: Raag Jadav <raag.jadav@intel.com>
Reviewed-by: Raag Jadav <raag.jadav@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
---
 MAINTAINERS                                |   1 +
 drivers/i2c/busses/i2c-designware-common.c |   2 +
 drivers/i2c/busses/i2c-designware-core.h   |  85 +---------------
 drivers/i2c/busses/i2c-designware-master.c |   2 +
 drivers/i2c/busses/i2c-designware-slave.c  |   2 +
 include/linux/designware_i2c.h             | 107 +++++++++++++++++++++
 6 files changed, 116 insertions(+), 83 deletions(-)
 create mode 100644 include/linux/designware_i2c.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 42ed870d55f94..ed1b75e9ecfe1 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -26245,6 +26245,7 @@ R:	Andy Shevchenko <andriy.shevchenko@linux.intel.com>
 L:	linux-i2c@vger.kernel.org
 S:	Supported
 F:	drivers/i2c/busses/i2c-designware-*
+F:	include/linux/designware_i2c.h
 
 SYNOPSYS DESIGNWARE I2C DRIVER - AMDISP
 M:	Nirujogi Pratap <pratap.nirujogi@amd.com>
diff --git a/drivers/i2c/busses/i2c-designware-common.c b/drivers/i2c/busses/i2c-designware-common.c
index e4dfa2ec58bb7..a1eca6cd4b75e 100644
--- a/drivers/i2c/busses/i2c-designware-common.c
+++ b/drivers/i2c/busses/i2c-designware-common.c
@@ -33,6 +33,8 @@
 #include <linux/types.h>
 #include <linux/units.h>
 
+#include <linux/designware_i2c.h>
+
 #include "i2c-designware-core.h"
 
 #define DW_IC_DEFAULT_BUS_CAPACITANCE_pF	100
diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h
index c71aa2dd368d5..2c929a6e8da2a 100644
--- a/drivers/i2c/busses/i2c-designware-core.h
+++ b/drivers/i2c/busses/i2c-designware-core.h
@@ -18,6 +18,8 @@
 #include <linux/regmap.h>
 #include <linux/types.h>
 
+#include <linux/designware_i2c.h>
+
 #define DW_IC_DEFAULT_FUNCTIONALITY		(I2C_FUNC_I2C | \
 						 I2C_FUNC_SMBUS_BYTE | \
 						 I2C_FUNC_SMBUS_BYTE_DATA | \
@@ -25,23 +27,6 @@
 						 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 +40,9 @@
 #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 +52,6 @@
 						 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 7a301c8b604ef..a1bcc3797e4ff 100644
--- a/drivers/i2c/busses/i2c-designware-master.c
+++ b/drivers/i2c/busses/i2c-designware-master.c
@@ -25,6 +25,8 @@
 #include <linux/regmap.h>
 #include <linux/reset.h>
 
+#include <linux/designware_i2c.h>
+
 #include "i2c-designware-core.h"
 
 #define AMD_TIMEOUT_MIN_US	25
diff --git a/drivers/i2c/busses/i2c-designware-slave.c b/drivers/i2c/busses/i2c-designware-slave.c
index ad0d5fbfa6d5e..0abcc7757b231 100644
--- a/drivers/i2c/busses/i2c-designware-slave.c
+++ b/drivers/i2c/busses/i2c-designware-slave.c
@@ -19,6 +19,8 @@
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 
+#include <linux/designware_i2c.h>
+
 #include "i2c-designware-core.h"
 
 int i2c_dw_reg_slave(struct i2c_client *slave)
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


  reply	other threads:[~2026-07-15 15:32 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-15 15:31 [PATCH v5 0/3] drm/xe/i2c: alerts and controller enabling modifications Heikki Krogerus
2026-07-15 15:31 ` Heikki Krogerus [this message]
2026-07-15 15:31 ` [PATCH v5 2/3] drm/xe/i2c: Fix the interrupt handling Heikki Krogerus
2026-07-16  5:37   ` Raag Jadav
2026-07-16  7:14     ` Heikki Krogerus
2026-07-15 15:31 ` [PATCH v5 3/3] drm/xe/i2c: Keep the i2c controller always enabled Heikki Krogerus
2026-07-15 16:04 ` ✗ CI.checkpatch: warning for drm/xe/i2c: alerts and controller enabling modifications (rev5) Patchwork
2026-07-15 16:05 ` ✓ CI.KUnit: success " Patchwork
2026-07-15 16:42 ` ✓ Xe.CI.BAT: " Patchwork
2026-07-15 20:53 ` ✓ Xe.CI.FULL: " Patchwork

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