[PATCH v2 0/6] add i2c support for mt7629 and mt8183

[PATCH v2 0/6] add i2c support for mt7629 and mt8183

[qii wang]

This series are based on 4.20-rc1 and provide five patches to support
mt7629 and mt8183 IC.

Main changes compared to v1:
--remove useless dt-binding for mt7629
--split a patch into two(2/6 3/6)
--muti-user feature was dropped

qii wang (6):
  dt-bindings: i2c: Add Mediatek MT7629 i2c binding
  i2c: mediatek: speeds is replaced by macros definitions
  i2c: mediatek: remove completion_done()
  i2c: mediatek: Add offsets array for new i2c registers
  dt-bindings: i2c: Add Mediatek MT8183 i2c binding
  i2c: mediatek: Add i2c support for MediaTek MT8183

 Documentation/devicetree/bindings/i2c/i2c-mtk.txt |    7 +-
 drivers/i2c/busses/i2c-mt65xx.c                   |  288 ++++++++++++++++-----
 2 files changed, 227 insertions(+), 68 deletions(-)

-- 
1.7.9.5

[PATCH v2 0/6] add i2c support for mt7629 and mt8183

[qii wang]

This series are based on 4.20-rc1 and provide five patches to support
mt7629 and mt8183 IC.

Main changes compared to v1:
--remove useless dt-binding for mt7629
--split a patch into two(2/6 3/6)
--muti-user feature was dropped

qii wang (6):
  dt-bindings: i2c: Add Mediatek MT7629 i2c binding
  i2c: mediatek: speeds is replaced by macros definitions
  i2c: mediatek: remove completion_done()
  i2c: mediatek: Add offsets array for new i2c registers
  dt-bindings: i2c: Add Mediatek MT8183 i2c binding
  i2c: mediatek: Add i2c support for MediaTek MT8183

 Documentation/devicetree/bindings/i2c/i2c-mtk.txt |    7 +-
 drivers/i2c/busses/i2c-mt65xx.c                   |  288 ++++++++++++++++-----
 2 files changed, 227 insertions(+), 68 deletions(-)

-- 
1.7.9.5

[PATCH v2 0/6] add i2c support for mt7629 and mt8183

[qii wang]

This series are based on 4.20-rc1 and provide five patches to support
mt7629 and mt8183 IC.

Main changes compared to v1:
--remove useless dt-binding for mt7629
--split a patch into two(2/6 3/6)
--muti-user feature was dropped

qii wang (6):
  dt-bindings: i2c: Add Mediatek MT7629 i2c binding
  i2c: mediatek: speeds is replaced by macros definitions
  i2c: mediatek: remove completion_done()
  i2c: mediatek: Add offsets array for new i2c registers
  dt-bindings: i2c: Add Mediatek MT8183 i2c binding
  i2c: mediatek: Add i2c support for MediaTek MT8183

 Documentation/devicetree/bindings/i2c/i2c-mtk.txt |    7 +-
 drivers/i2c/busses/i2c-mt65xx.c                   |  288 ++++++++++++++++-----
 2 files changed, 227 insertions(+), 68 deletions(-)

-- 
1.7.9.5


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[PATCH 1/6] dt-bindings: i2c: Add Mediatek MT7629 i2c binding

[qii wang]

Add MT7629 i2c binding to binding file.

Signed-off-by: qii wang <qii.wang@mediatek.com>
---
 Documentation/devicetree/bindings/i2c/i2c-mtk.txt |    1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/i2c/i2c-mtk.txt b/Documentation/devicetree/bindings/i2c/i2c-mtk.txt
index e199695..ee4c324 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-mtk.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-mtk.txt
@@ -10,6 +10,7 @@ Required properties:
       "mediatek,mt6589-i2c": for MediaTek MT6589
       "mediatek,mt7622-i2c": for MediaTek MT7622
       "mediatek,mt7623-i2c", "mediatek,mt6577-i2c": for MediaTek MT7623
+      "mediatek,mt7629-i2c", "mediatek,mt2712-i2c": for MediaTek MT7629
       "mediatek,mt8173-i2c": for MediaTek MT8173
   - reg: physical base address of the controller and dma base, length of memory
     mapped region.
-- 
1.7.9.5

[PATCH 1/6] dt-bindings: i2c: Add Mediatek MT7629 i2c binding

[qii wang]

Add MT7629 i2c binding to binding file.

Signed-off-by: qii wang <qii.wang@mediatek.com>
---
 Documentation/devicetree/bindings/i2c/i2c-mtk.txt |    1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/i2c/i2c-mtk.txt b/Documentation/devicetree/bindings/i2c/i2c-mtk.txt
index e199695..ee4c324 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-mtk.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-mtk.txt
@@ -10,6 +10,7 @@ Required properties:
       "mediatek,mt6589-i2c": for MediaTek MT6589
       "mediatek,mt7622-i2c": for MediaTek MT7622
       "mediatek,mt7623-i2c", "mediatek,mt6577-i2c": for MediaTek MT7623
+      "mediatek,mt7629-i2c", "mediatek,mt2712-i2c": for MediaTek MT7629
       "mediatek,mt8173-i2c": for MediaTek MT8173
   - reg: physical base address of the controller and dma base, length of memory
     mapped region.
-- 
1.7.9.5

[PATCH 1/6] dt-bindings: i2c: Add Mediatek MT7629 i2c binding

[qii wang]

Add MT7629 i2c binding to binding file.

Signed-off-by: qii wang <qii.wang@mediatek.com>
---
 Documentation/devicetree/bindings/i2c/i2c-mtk.txt |    1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/i2c/i2c-mtk.txt b/Documentation/devicetree/bindings/i2c/i2c-mtk.txt
index e199695..ee4c324 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-mtk.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-mtk.txt
@@ -10,6 +10,7 @@ Required properties:
       "mediatek,mt6589-i2c": for MediaTek MT6589
       "mediatek,mt7622-i2c": for MediaTek MT7622
       "mediatek,mt7623-i2c", "mediatek,mt6577-i2c": for MediaTek MT7623
+      "mediatek,mt7629-i2c", "mediatek,mt2712-i2c": for MediaTek MT7629
       "mediatek,mt8173-i2c": for MediaTek MT8173
   - reg: physical base address of the controller and dma base, length of memory
     mapped region.
-- 
1.7.9.5


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Re: [PATCH 1/6] dt-bindings: i2c: Add Mediatek MT7629 i2c binding

[Rob Herring]

On Fri, 21 Dec 2018 20:58:26 +0800, qii wang wrote:
> Add MT7629 i2c binding to binding file.
> 
> Signed-off-by: qii wang <qii.wang@mediatek.com>
> ---
>  Documentation/devicetree/bindings/i2c/i2c-mtk.txt |    1 +
>  1 file changed, 1 insertion(+)
> 

Reviewed-by: Rob Herring <robh@kernel.org>

Re: [PATCH 1/6] dt-bindings: i2c: Add Mediatek MT7629 i2c binding

[Rob Herring]

On Fri, 21 Dec 2018 20:58:26 +0800, qii wang wrote:
> Add MT7629 i2c binding to binding file.
> 
> Signed-off-by: qii wang <qii.wang@mediatek.com>
> ---
>  Documentation/devicetree/bindings/i2c/i2c-mtk.txt |    1 +
>  1 file changed, 1 insertion(+)
> 

Reviewed-by: Rob Herring <robh@kernel.org>

Re: [PATCH 1/6] dt-bindings: i2c: Add Mediatek MT7629 i2c binding

[Rob Herring]

On Fri, 21 Dec 2018 20:58:26 +0800, qii wang wrote:
> Add MT7629 i2c binding to binding file.
> 
> Signed-off-by: qii wang <qii.wang@mediatek.com>
> ---
>  Documentation/devicetree/bindings/i2c/i2c-mtk.txt |    1 +
>  1 file changed, 1 insertion(+)
> 

Reviewed-by: Rob Herring <robh@kernel.org>

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[PATCH 2/6] i2c: mediatek: speeds is replaced by macros definitions

[qii wang]

Different speeds have been defined by macros,
so we use macros definitions.

Signed-off-by: qii wang <qii.wang@mediatek.com>
---
 drivers/i2c/busses/i2c-mt65xx.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index a74ef76..7396449 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -456,7 +456,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 
 	control_reg = readw(i2c->base + OFFSET_CONTROL) &
 			~(I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS);
-	if ((i2c->speed_hz > 400000) || (left_num >= 1))
+	if ((i2c->speed_hz > MAX_FS_MODE_SPEED) || (left_num >= 1))
 		control_reg |= I2C_CONTROL_RS;
 
 	if (i2c->op == I2C_MASTER_WRRD)
@@ -465,7 +465,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 	writew(control_reg, i2c->base + OFFSET_CONTROL);
 
 	/* set start condition */
-	if (i2c->speed_hz <= 100000)
+	if (i2c->speed_hz <= I2C_DEFAULT_SPEED)
 		writew(I2C_ST_START_CON, i2c->base + OFFSET_EXT_CONF);
 	else
 		writew(I2C_FS_START_CON, i2c->base + OFFSET_EXT_CONF);
-- 
1.7.9.5

[PATCH 2/6] i2c: mediatek: speeds is replaced by macros definitions

[qii wang]

Different speeds have been defined by macros,
so we use macros definitions.

Signed-off-by: qii wang <qii.wang@mediatek.com>
---
 drivers/i2c/busses/i2c-mt65xx.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index a74ef76..7396449 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -456,7 +456,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 
 	control_reg = readw(i2c->base + OFFSET_CONTROL) &
 			~(I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS);
-	if ((i2c->speed_hz > 400000) || (left_num >= 1))
+	if ((i2c->speed_hz > MAX_FS_MODE_SPEED) || (left_num >= 1))
 		control_reg |= I2C_CONTROL_RS;
 
 	if (i2c->op == I2C_MASTER_WRRD)
@@ -465,7 +465,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 	writew(control_reg, i2c->base + OFFSET_CONTROL);
 
 	/* set start condition */
-	if (i2c->speed_hz <= 100000)
+	if (i2c->speed_hz <= I2C_DEFAULT_SPEED)
 		writew(I2C_ST_START_CON, i2c->base + OFFSET_EXT_CONF);
 	else
 		writew(I2C_FS_START_CON, i2c->base + OFFSET_EXT_CONF);
-- 
1.7.9.5

[PATCH 2/6] i2c: mediatek: speeds is replaced by macros definitions

[qii wang]

Different speeds have been defined by macros,
so we use macros definitions.

Signed-off-by: qii wang <qii.wang@mediatek.com>
---
 drivers/i2c/busses/i2c-mt65xx.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index a74ef76..7396449 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -456,7 +456,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 
 	control_reg = readw(i2c->base + OFFSET_CONTROL) &
 			~(I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS);
-	if ((i2c->speed_hz > 400000) || (left_num >= 1))
+	if ((i2c->speed_hz > MAX_FS_MODE_SPEED) || (left_num >= 1))
 		control_reg |= I2C_CONTROL_RS;
 
 	if (i2c->op == I2C_MASTER_WRRD)
@@ -465,7 +465,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 	writew(control_reg, i2c->base + OFFSET_CONTROL);
 
 	/* set start condition */
-	if (i2c->speed_hz <= 100000)
+	if (i2c->speed_hz <= I2C_DEFAULT_SPEED)
 		writew(I2C_ST_START_CON, i2c->base + OFFSET_EXT_CONF);
 	else
 		writew(I2C_FS_START_CON, i2c->base + OFFSET_EXT_CONF);
-- 
1.7.9.5


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Re: [PATCH 2/6] i2c: mediatek: speeds is replaced by macros definitions

[Nicolas Boichat]

On Fri, Dec 21, 2018 at 8:59 PM qii wang <qii.wang@mediatek.com> wrote:
>
> Different speeds have been defined by macros,
> so we use macros definitions.
>
> Signed-off-by: qii wang <qii.wang@mediatek.com>

Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>

> ---
>  drivers/i2c/busses/i2c-mt65xx.c |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
> index a74ef76..7396449 100644
> --- a/drivers/i2c/busses/i2c-mt65xx.c
> +++ b/drivers/i2c/busses/i2c-mt65xx.c
> @@ -456,7 +456,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
>
>         control_reg = readw(i2c->base + OFFSET_CONTROL) &
>                         ~(I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS);
> -       if ((i2c->speed_hz > 400000) || (left_num >= 1))
> +       if ((i2c->speed_hz > MAX_FS_MODE_SPEED) || (left_num >= 1))
>                 control_reg |= I2C_CONTROL_RS;
>
>         if (i2c->op == I2C_MASTER_WRRD)
> @@ -465,7 +465,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
>         writew(control_reg, i2c->base + OFFSET_CONTROL);
>
>         /* set start condition */
> -       if (i2c->speed_hz <= 100000)
> +       if (i2c->speed_hz <= I2C_DEFAULT_SPEED)
>                 writew(I2C_ST_START_CON, i2c->base + OFFSET_EXT_CONF);
>         else
>                 writew(I2C_FS_START_CON, i2c->base + OFFSET_EXT_CONF);
> --
> 1.7.9.5
>

Re: [PATCH 2/6] i2c: mediatek: speeds is replaced by macros definitions

[Nicolas Boichat]

On Fri, Dec 21, 2018 at 8:59 PM qii wang <qii.wang@mediatek.com> wrote:
>
> Different speeds have been defined by macros,
> so we use macros definitions.
>
> Signed-off-by: qii wang <qii.wang@mediatek.com>

Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>

> ---
>  drivers/i2c/busses/i2c-mt65xx.c |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
> index a74ef76..7396449 100644
> --- a/drivers/i2c/busses/i2c-mt65xx.c
> +++ b/drivers/i2c/busses/i2c-mt65xx.c
> @@ -456,7 +456,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
>
>         control_reg = readw(i2c->base + OFFSET_CONTROL) &
>                         ~(I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS);
> -       if ((i2c->speed_hz > 400000) || (left_num >= 1))
> +       if ((i2c->speed_hz > MAX_FS_MODE_SPEED) || (left_num >= 1))
>                 control_reg |= I2C_CONTROL_RS;
>
>         if (i2c->op == I2C_MASTER_WRRD)
> @@ -465,7 +465,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
>         writew(control_reg, i2c->base + OFFSET_CONTROL);
>
>         /* set start condition */
> -       if (i2c->speed_hz <= 100000)
> +       if (i2c->speed_hz <= I2C_DEFAULT_SPEED)
>                 writew(I2C_ST_START_CON, i2c->base + OFFSET_EXT_CONF);
>         else
>                 writew(I2C_FS_START_CON, i2c->base + OFFSET_EXT_CONF);
> --
> 1.7.9.5
>

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[PATCH 3/6] i2c: mediatek: remove completion_done()

[qii wang]

Completion_done() is useless when we don't use its return value,
so we remove it.

Signed-off-by: qii wang <qii.wang@mediatek.com>
---
 drivers/i2c/busses/i2c-mt65xx.c |    2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index 7396449..660de1e 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -642,8 +642,6 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 		return -ETIMEDOUT;
 	}
 
-	completion_done(&i2c->msg_complete);
-
 	if (i2c->irq_stat & (I2C_HS_NACKERR | I2C_ACKERR)) {
 		dev_dbg(i2c->dev, "addr: %x, transfer ACK error\n", msgs->addr);
 		mtk_i2c_init_hw(i2c);
-- 
1.7.9.5

[PATCH 3/6] i2c: mediatek: remove completion_done()

[qii wang]

Completion_done() is useless when we don't use its return value,
so we remove it.

Signed-off-by: qii wang <qii.wang@mediatek.com>
---
 drivers/i2c/busses/i2c-mt65xx.c |    2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index 7396449..660de1e 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -642,8 +642,6 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 		return -ETIMEDOUT;
 	}
 
-	completion_done(&i2c->msg_complete);
-
 	if (i2c->irq_stat & (I2C_HS_NACKERR | I2C_ACKERR)) {
 		dev_dbg(i2c->dev, "addr: %x, transfer ACK error\n", msgs->addr);
 		mtk_i2c_init_hw(i2c);
-- 
1.7.9.5

[PATCH 3/6] i2c: mediatek: remove completion_done()

[qii wang]

Completion_done() is useless when we don't use its return value,
so we remove it.

Signed-off-by: qii wang <qii.wang@mediatek.com>
---
 drivers/i2c/busses/i2c-mt65xx.c |    2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index 7396449..660de1e 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -642,8 +642,6 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 		return -ETIMEDOUT;
 	}
 
-	completion_done(&i2c->msg_complete);
-
 	if (i2c->irq_stat & (I2C_HS_NACKERR | I2C_ACKERR)) {
 		dev_dbg(i2c->dev, "addr: %x, transfer ACK error\n", msgs->addr);
 		mtk_i2c_init_hw(i2c);
-- 
1.7.9.5


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[PATCH 4/6] i2c: mediatek: Add offsets array for new i2c registers

[qii wang]

New i2c registers would have different offsets, so we use different
offsets array to distinguish different i2c registers version.

Signed-off-by: qii wang <qii.wang@mediatek.com>
---
 drivers/i2c/busses/i2c-mt65xx.c |  163 +++++++++++++++++++++++++--------------
 1 file changed, 104 insertions(+), 59 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index 660de1e..428ac99 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -106,34 +106,62 @@ enum mtk_trans_op {
 };
 
 enum I2C_REGS_OFFSET {
-	OFFSET_DATA_PORT = 0x0,
-	OFFSET_SLAVE_ADDR = 0x04,
-	OFFSET_INTR_MASK = 0x08,
-	OFFSET_INTR_STAT = 0x0c,
-	OFFSET_CONTROL = 0x10,
-	OFFSET_TRANSFER_LEN = 0x14,
-	OFFSET_TRANSAC_LEN = 0x18,
-	OFFSET_DELAY_LEN = 0x1c,
-	OFFSET_TIMING = 0x20,
-	OFFSET_START = 0x24,
-	OFFSET_EXT_CONF = 0x28,
-	OFFSET_FIFO_STAT = 0x30,
-	OFFSET_FIFO_THRESH = 0x34,
-	OFFSET_FIFO_ADDR_CLR = 0x38,
-	OFFSET_IO_CONFIG = 0x40,
-	OFFSET_RSV_DEBUG = 0x44,
-	OFFSET_HS = 0x48,
-	OFFSET_SOFTRESET = 0x50,
-	OFFSET_DCM_EN = 0x54,
-	OFFSET_PATH_DIR = 0x60,
-	OFFSET_DEBUGSTAT = 0x64,
-	OFFSET_DEBUGCTRL = 0x68,
-	OFFSET_TRANSFER_LEN_AUX = 0x6c,
-	OFFSET_CLOCK_DIV = 0x70,
+	OFFSET_DATA_PORT,
+	OFFSET_SLAVE_ADDR,
+	OFFSET_INTR_MASK,
+	OFFSET_INTR_STAT,
+	OFFSET_CONTROL,
+	OFFSET_TRANSFER_LEN,
+	OFFSET_TRANSAC_LEN,
+	OFFSET_DELAY_LEN,
+	OFFSET_TIMING,
+	OFFSET_START,
+	OFFSET_EXT_CONF,
+	OFFSET_FIFO_STAT,
+	OFFSET_FIFO_THRESH,
+	OFFSET_FIFO_ADDR_CLR,
+	OFFSET_IO_CONFIG,
+	OFFSET_RSV_DEBUG,
+	OFFSET_HS,
+	OFFSET_SOFTRESET,
+	OFFSET_DCM_EN,
+	OFFSET_PATH_DIR,
+	OFFSET_DEBUGSTAT,
+	OFFSET_DEBUGCTRL,
+	OFFSET_TRANSFER_LEN_AUX,
+	OFFSET_CLOCK_DIV,
+};
+
+static const u16 mt_i2c_regs_v1[] = {
+	[OFFSET_DATA_PORT] = 0x0,
+	[OFFSET_SLAVE_ADDR] = 0x4,
+	[OFFSET_INTR_MASK] = 0x8,
+	[OFFSET_INTR_STAT] = 0xc,
+	[OFFSET_CONTROL] = 0x10,
+	[OFFSET_TRANSFER_LEN] = 0x14,
+	[OFFSET_TRANSAC_LEN] = 0x18,
+	[OFFSET_DELAY_LEN] = 0x1c,
+	[OFFSET_TIMING] = 0x20,
+	[OFFSET_START] = 0x24,
+	[OFFSET_EXT_CONF] = 0x28,
+	[OFFSET_FIFO_STAT] = 0x30,
+	[OFFSET_FIFO_THRESH] = 0x34,
+	[OFFSET_FIFO_ADDR_CLR] = 0x38,
+	[OFFSET_IO_CONFIG] = 0x40,
+	[OFFSET_RSV_DEBUG] = 0x44,
+	[OFFSET_HS] = 0x48,
+	[OFFSET_SOFTRESET] = 0x50,
+	[OFFSET_DCM_EN] = 0x54,
+	[OFFSET_PATH_DIR] = 0x60,
+	[OFFSET_DEBUGSTAT] = 0x64,
+	[OFFSET_DEBUGCTRL] = 0x68,
+	[OFFSET_TRANSFER_LEN_AUX] = 0x6c,
+	[OFFSET_CLOCK_DIV] = 0x70,
 };
 
 struct mtk_i2c_compatible {
 	const struct i2c_adapter_quirks *quirks;
+	const u16 *regs;
 	unsigned char pmic_i2c: 1;
 	unsigned char dcm: 1;
 	unsigned char auto_restart: 1;
@@ -181,6 +209,7 @@ struct mtk_i2c {
 };
 
 static const struct mtk_i2c_compatible mt2712_compat = {
+	.regs = mt_i2c_regs_v1,
 	.pmic_i2c = 0,
 	.dcm = 1,
 	.auto_restart = 1,
@@ -191,6 +220,7 @@ struct mtk_i2c {
 
 static const struct mtk_i2c_compatible mt6577_compat = {
 	.quirks = &mt6577_i2c_quirks,
+	.regs = mt_i2c_regs_v1,
 	.pmic_i2c = 0,
 	.dcm = 1,
 	.auto_restart = 0,
@@ -201,6 +231,7 @@ struct mtk_i2c {
 
 static const struct mtk_i2c_compatible mt6589_compat = {
 	.quirks = &mt6577_i2c_quirks,
+	.regs = mt_i2c_regs_v1,
 	.pmic_i2c = 1,
 	.dcm = 0,
 	.auto_restart = 0,
@@ -211,6 +242,7 @@ struct mtk_i2c {
 
 static const struct mtk_i2c_compatible mt7622_compat = {
 	.quirks = &mt7622_i2c_quirks,
+	.regs = mt_i2c_regs_v1,
 	.pmic_i2c = 0,
 	.dcm = 1,
 	.auto_restart = 1,
@@ -220,6 +252,7 @@ struct mtk_i2c {
 };
 
 static const struct mtk_i2c_compatible mt8173_compat = {
+	.regs = mt_i2c_regs_v1,
 	.pmic_i2c = 0,
 	.dcm = 1,
 	.auto_restart = 1,
@@ -238,6 +271,17 @@ struct mtk_i2c {
 };
 MODULE_DEVICE_TABLE(of, mtk_i2c_of_match);
 
+static u16 mtk_i2c_readw(struct mtk_i2c *i2c, enum I2C_REGS_OFFSET reg)
+{
+	return readw(i2c->base + i2c->dev_comp->regs[reg]);
+}
+
+static void mtk_i2c_writew(struct mtk_i2c *i2c, u16 val,
+			   enum I2C_REGS_OFFSET reg)
+{
+	writew(val, i2c->base + i2c->dev_comp->regs[reg]);
+}
+
 static int mtk_i2c_clock_enable(struct mtk_i2c *i2c)
 {
 	int ret;
@@ -278,31 +322,31 @@ static void mtk_i2c_init_hw(struct mtk_i2c *i2c)
 {
 	u16 control_reg;
 
-	writew(I2C_SOFT_RST, i2c->base + OFFSET_SOFTRESET);
+	mtk_i2c_writew(i2c, I2C_SOFT_RST, OFFSET_SOFTRESET);
 
 	/* Set ioconfig */
 	if (i2c->use_push_pull)
-		writew(I2C_IO_CONFIG_PUSH_PULL, i2c->base + OFFSET_IO_CONFIG);
+		mtk_i2c_writew(i2c, I2C_IO_CONFIG_PUSH_PULL, OFFSET_IO_CONFIG);
 	else
-		writew(I2C_IO_CONFIG_OPEN_DRAIN, i2c->base + OFFSET_IO_CONFIG);
+		mtk_i2c_writew(i2c, I2C_IO_CONFIG_OPEN_DRAIN, OFFSET_IO_CONFIG);
 
 	if (i2c->dev_comp->dcm)
-		writew(I2C_DCM_DISABLE, i2c->base + OFFSET_DCM_EN);
+		mtk_i2c_writew(i2c, I2C_DCM_DISABLE, OFFSET_DCM_EN);
 
 	if (i2c->dev_comp->timing_adjust)
-		writew(I2C_DEFAULT_CLK_DIV - 1, i2c->base + OFFSET_CLOCK_DIV);
+		mtk_i2c_writew(i2c, I2C_DEFAULT_CLK_DIV - 1, OFFSET_CLOCK_DIV);
 
-	writew(i2c->timing_reg, i2c->base + OFFSET_TIMING);
-	writew(i2c->high_speed_reg, i2c->base + OFFSET_HS);
+	mtk_i2c_writew(i2c, i2c->timing_reg, OFFSET_TIMING);
+	mtk_i2c_writew(i2c, i2c->high_speed_reg, OFFSET_HS);
 
 	/* If use i2c pin from PMIC mt6397 side, need set PATH_DIR first */
 	if (i2c->have_pmic)
-		writew(I2C_CONTROL_WRAPPER, i2c->base + OFFSET_PATH_DIR);
+		mtk_i2c_writew(i2c, I2C_CONTROL_WRAPPER, OFFSET_PATH_DIR);
 
 	control_reg = I2C_CONTROL_ACKERR_DET_EN |
 		      I2C_CONTROL_CLK_EXT_EN | I2C_CONTROL_DMA_EN;
-	writew(control_reg, i2c->base + OFFSET_CONTROL);
-	writew(I2C_DELAY_LEN, i2c->base + OFFSET_DELAY_LEN);
+	mtk_i2c_writew(i2c, control_reg, OFFSET_CONTROL);
+	mtk_i2c_writew(i2c, I2C_DELAY_LEN, OFFSET_DELAY_LEN);
 
 	writel(I2C_DMA_HARD_RST, i2c->pdmabase + OFFSET_RST);
 	udelay(50);
@@ -454,7 +498,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 
 	reinit_completion(&i2c->msg_complete);
 
-	control_reg = readw(i2c->base + OFFSET_CONTROL) &
+	control_reg = mtk_i2c_readw(i2c, OFFSET_CONTROL) &
 			~(I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS);
 	if ((i2c->speed_hz > MAX_FS_MODE_SPEED) || (left_num >= 1))
 		control_reg |= I2C_CONTROL_RS;
@@ -462,40 +506,41 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 	if (i2c->op == I2C_MASTER_WRRD)
 		control_reg |= I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS;
 
-	writew(control_reg, i2c->base + OFFSET_CONTROL);
+	mtk_i2c_writew(i2c, control_reg, OFFSET_CONTROL);
 
 	/* set start condition */
 	if (i2c->speed_hz <= I2C_DEFAULT_SPEED)
-		writew(I2C_ST_START_CON, i2c->base + OFFSET_EXT_CONF);
+		mtk_i2c_writew(i2c, I2C_ST_START_CON, OFFSET_EXT_CONF);
 	else
-		writew(I2C_FS_START_CON, i2c->base + OFFSET_EXT_CONF);
+		mtk_i2c_writew(i2c, I2C_FS_START_CON, OFFSET_EXT_CONF);
 
 	addr_reg = i2c_8bit_addr_from_msg(msgs);
-	writew(addr_reg, i2c->base + OFFSET_SLAVE_ADDR);
+	mtk_i2c_writew(i2c, addr_reg, OFFSET_SLAVE_ADDR);
 
 	/* Clear interrupt status */
-	writew(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
-	       I2C_TRANSAC_COMP, i2c->base + OFFSET_INTR_STAT);
-	writew(I2C_FIFO_ADDR_CLR, i2c->base + OFFSET_FIFO_ADDR_CLR);
+	mtk_i2c_writew(i2c, restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
+	       I2C_TRANSAC_COMP, OFFSET_INTR_STAT);
+
+	mtk_i2c_writew(i2c, I2C_FIFO_ADDR_CLR, OFFSET_FIFO_ADDR_CLR);
 
 	/* Enable interrupt */
-	writew(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
-	       I2C_TRANSAC_COMP, i2c->base + OFFSET_INTR_MASK);
+	mtk_i2c_writew(i2c, restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
+	       I2C_TRANSAC_COMP, OFFSET_INTR_MASK);
 
 	/* Set transfer and transaction len */
 	if (i2c->op == I2C_MASTER_WRRD) {
 		if (i2c->dev_comp->aux_len_reg) {
-			writew(msgs->len, i2c->base + OFFSET_TRANSFER_LEN);
-			writew((msgs + 1)->len, i2c->base +
-			       OFFSET_TRANSFER_LEN_AUX);
+			mtk_i2c_writew(i2c, msgs->len, OFFSET_TRANSFER_LEN);
+			mtk_i2c_writew(i2c, (msgs + 1)->len,
+					    OFFSET_TRANSFER_LEN_AUX);
 		} else {
-			writew(msgs->len | ((msgs + 1)->len) << 8,
-			       i2c->base + OFFSET_TRANSFER_LEN);
+			mtk_i2c_writew(i2c, msgs->len | ((msgs + 1)->len) << 8,
+					    OFFSET_TRANSFER_LEN);
 		}
-		writew(I2C_WRRD_TRANAC_VALUE, i2c->base + OFFSET_TRANSAC_LEN);
+		mtk_i2c_writew(i2c, I2C_WRRD_TRANAC_VALUE, OFFSET_TRANSAC_LEN);
 	} else {
-		writew(msgs->len, i2c->base + OFFSET_TRANSFER_LEN);
-		writew(num, i2c->base + OFFSET_TRANSAC_LEN);
+		mtk_i2c_writew(i2c, msgs->len, OFFSET_TRANSFER_LEN);
+		mtk_i2c_writew(i2c, num, OFFSET_TRANSAC_LEN);
 	}
 
 	/* Prepare buffer data to start transfer */
@@ -607,14 +652,14 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 		if (left_num >= 1)
 			start_reg |= I2C_RS_MUL_CNFG;
 	}
-	writew(start_reg, i2c->base + OFFSET_START);
+	mtk_i2c_writew(i2c, start_reg, OFFSET_START);
 
 	ret = wait_for_completion_timeout(&i2c->msg_complete,
 					  i2c->adap.timeout);
 
 	/* Clear interrupt mask */
-	writew(~(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
-	       I2C_TRANSAC_COMP), i2c->base + OFFSET_INTR_MASK);
+	mtk_i2c_writew(i2c, ~(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
+	       I2C_TRANSAC_COMP), OFFSET_INTR_MASK);
 
 	if (i2c->op == I2C_MASTER_WR) {
 		dma_unmap_single(i2c->dev, wpaddr,
@@ -724,8 +769,8 @@ static irqreturn_t mtk_i2c_irq(int irqno, void *dev_id)
 	if (i2c->auto_restart)
 		restart_flag = I2C_RS_TRANSFER;
 
-	intr_stat = readw(i2c->base + OFFSET_INTR_STAT);
-	writew(intr_stat, i2c->base + OFFSET_INTR_STAT);
+	intr_stat = mtk_i2c_readw(i2c, OFFSET_INTR_STAT);
+	mtk_i2c_writew(i2c, intr_stat, OFFSET_INTR_STAT);
 
 	/*
 	 * when occurs ack error, i2c controller generate two interrupts
@@ -737,8 +782,8 @@ static irqreturn_t mtk_i2c_irq(int irqno, void *dev_id)
 	if (i2c->ignore_restart_irq && (i2c->irq_stat & restart_flag)) {
 		i2c->ignore_restart_irq = false;
 		i2c->irq_stat = 0;
-		writew(I2C_RS_MUL_CNFG | I2C_RS_MUL_TRIG | I2C_TRANSAC_START,
-		       i2c->base + OFFSET_START);
+		mtk_i2c_writew(i2c, I2C_RS_MUL_CNFG | I2C_RS_MUL_TRIG |
+				    I2C_TRANSAC_START, OFFSET_START);
 	} else {
 		if (i2c->irq_stat & (I2C_TRANSAC_COMP | restart_flag))
 			complete(&i2c->msg_complete);
-- 
1.7.9.5

[PATCH 4/6] i2c: mediatek: Add offsets array for new i2c registers

[qii wang]

New i2c registers would have different offsets, so we use different
offsets array to distinguish different i2c registers version.

Signed-off-by: qii wang <qii.wang@mediatek.com>
---
 drivers/i2c/busses/i2c-mt65xx.c |  163 +++++++++++++++++++++++++--------------
 1 file changed, 104 insertions(+), 59 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index 660de1e..428ac99 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -106,34 +106,62 @@ enum mtk_trans_op {
 };
 
 enum I2C_REGS_OFFSET {
-	OFFSET_DATA_PORT = 0x0,
-	OFFSET_SLAVE_ADDR = 0x04,
-	OFFSET_INTR_MASK = 0x08,
-	OFFSET_INTR_STAT = 0x0c,
-	OFFSET_CONTROL = 0x10,
-	OFFSET_TRANSFER_LEN = 0x14,
-	OFFSET_TRANSAC_LEN = 0x18,
-	OFFSET_DELAY_LEN = 0x1c,
-	OFFSET_TIMING = 0x20,
-	OFFSET_START = 0x24,
-	OFFSET_EXT_CONF = 0x28,
-	OFFSET_FIFO_STAT = 0x30,
-	OFFSET_FIFO_THRESH = 0x34,
-	OFFSET_FIFO_ADDR_CLR = 0x38,
-	OFFSET_IO_CONFIG = 0x40,
-	OFFSET_RSV_DEBUG = 0x44,
-	OFFSET_HS = 0x48,
-	OFFSET_SOFTRESET = 0x50,
-	OFFSET_DCM_EN = 0x54,
-	OFFSET_PATH_DIR = 0x60,
-	OFFSET_DEBUGSTAT = 0x64,
-	OFFSET_DEBUGCTRL = 0x68,
-	OFFSET_TRANSFER_LEN_AUX = 0x6c,
-	OFFSET_CLOCK_DIV = 0x70,
+	OFFSET_DATA_PORT,
+	OFFSET_SLAVE_ADDR,
+	OFFSET_INTR_MASK,
+	OFFSET_INTR_STAT,
+	OFFSET_CONTROL,
+	OFFSET_TRANSFER_LEN,
+	OFFSET_TRANSAC_LEN,
+	OFFSET_DELAY_LEN,
+	OFFSET_TIMING,
+	OFFSET_START,
+	OFFSET_EXT_CONF,
+	OFFSET_FIFO_STAT,
+	OFFSET_FIFO_THRESH,
+	OFFSET_FIFO_ADDR_CLR,
+	OFFSET_IO_CONFIG,
+	OFFSET_RSV_DEBUG,
+	OFFSET_HS,
+	OFFSET_SOFTRESET,
+	OFFSET_DCM_EN,
+	OFFSET_PATH_DIR,
+	OFFSET_DEBUGSTAT,
+	OFFSET_DEBUGCTRL,
+	OFFSET_TRANSFER_LEN_AUX,
+	OFFSET_CLOCK_DIV,
+};
+
+static const u16 mt_i2c_regs_v1[] = {
+	[OFFSET_DATA_PORT] = 0x0,
+	[OFFSET_SLAVE_ADDR] = 0x4,
+	[OFFSET_INTR_MASK] = 0x8,
+	[OFFSET_INTR_STAT] = 0xc,
+	[OFFSET_CONTROL] = 0x10,
+	[OFFSET_TRANSFER_LEN] = 0x14,
+	[OFFSET_TRANSAC_LEN] = 0x18,
+	[OFFSET_DELAY_LEN] = 0x1c,
+	[OFFSET_TIMING] = 0x20,
+	[OFFSET_START] = 0x24,
+	[OFFSET_EXT_CONF] = 0x28,
+	[OFFSET_FIFO_STAT] = 0x30,
+	[OFFSET_FIFO_THRESH] = 0x34,
+	[OFFSET_FIFO_ADDR_CLR] = 0x38,
+	[OFFSET_IO_CONFIG] = 0x40,
+	[OFFSET_RSV_DEBUG] = 0x44,
+	[OFFSET_HS] = 0x48,
+	[OFFSET_SOFTRESET] = 0x50,
+	[OFFSET_DCM_EN] = 0x54,
+	[OFFSET_PATH_DIR] = 0x60,
+	[OFFSET_DEBUGSTAT] = 0x64,
+	[OFFSET_DEBUGCTRL] = 0x68,
+	[OFFSET_TRANSFER_LEN_AUX] = 0x6c,
+	[OFFSET_CLOCK_DIV] = 0x70,
 };
 
 struct mtk_i2c_compatible {
 	const struct i2c_adapter_quirks *quirks;
+	const u16 *regs;
 	unsigned char pmic_i2c: 1;
 	unsigned char dcm: 1;
 	unsigned char auto_restart: 1;
@@ -181,6 +209,7 @@ struct mtk_i2c {
 };
 
 static const struct mtk_i2c_compatible mt2712_compat = {
+	.regs = mt_i2c_regs_v1,
 	.pmic_i2c = 0,
 	.dcm = 1,
 	.auto_restart = 1,
@@ -191,6 +220,7 @@ struct mtk_i2c {
 
 static const struct mtk_i2c_compatible mt6577_compat = {
 	.quirks = &mt6577_i2c_quirks,
+	.regs = mt_i2c_regs_v1,
 	.pmic_i2c = 0,
 	.dcm = 1,
 	.auto_restart = 0,
@@ -201,6 +231,7 @@ struct mtk_i2c {
 
 static const struct mtk_i2c_compatible mt6589_compat = {
 	.quirks = &mt6577_i2c_quirks,
+	.regs = mt_i2c_regs_v1,
 	.pmic_i2c = 1,
 	.dcm = 0,
 	.auto_restart = 0,
@@ -211,6 +242,7 @@ struct mtk_i2c {
 
 static const struct mtk_i2c_compatible mt7622_compat = {
 	.quirks = &mt7622_i2c_quirks,
+	.regs = mt_i2c_regs_v1,
 	.pmic_i2c = 0,
 	.dcm = 1,
 	.auto_restart = 1,
@@ -220,6 +252,7 @@ struct mtk_i2c {
 };
 
 static const struct mtk_i2c_compatible mt8173_compat = {
+	.regs = mt_i2c_regs_v1,
 	.pmic_i2c = 0,
 	.dcm = 1,
 	.auto_restart = 1,
@@ -238,6 +271,17 @@ struct mtk_i2c {
 };
 MODULE_DEVICE_TABLE(of, mtk_i2c_of_match);
 
+static u16 mtk_i2c_readw(struct mtk_i2c *i2c, enum I2C_REGS_OFFSET reg)
+{
+	return readw(i2c->base + i2c->dev_comp->regs[reg]);
+}
+
+static void mtk_i2c_writew(struct mtk_i2c *i2c, u16 val,
+			   enum I2C_REGS_OFFSET reg)
+{
+	writew(val, i2c->base + i2c->dev_comp->regs[reg]);
+}
+
 static int mtk_i2c_clock_enable(struct mtk_i2c *i2c)
 {
 	int ret;
@@ -278,31 +322,31 @@ static void mtk_i2c_init_hw(struct mtk_i2c *i2c)
 {
 	u16 control_reg;
 
-	writew(I2C_SOFT_RST, i2c->base + OFFSET_SOFTRESET);
+	mtk_i2c_writew(i2c, I2C_SOFT_RST, OFFSET_SOFTRESET);
 
 	/* Set ioconfig */
 	if (i2c->use_push_pull)
-		writew(I2C_IO_CONFIG_PUSH_PULL, i2c->base + OFFSET_IO_CONFIG);
+		mtk_i2c_writew(i2c, I2C_IO_CONFIG_PUSH_PULL, OFFSET_IO_CONFIG);
 	else
-		writew(I2C_IO_CONFIG_OPEN_DRAIN, i2c->base + OFFSET_IO_CONFIG);
+		mtk_i2c_writew(i2c, I2C_IO_CONFIG_OPEN_DRAIN, OFFSET_IO_CONFIG);
 
 	if (i2c->dev_comp->dcm)
-		writew(I2C_DCM_DISABLE, i2c->base + OFFSET_DCM_EN);
+		mtk_i2c_writew(i2c, I2C_DCM_DISABLE, OFFSET_DCM_EN);
 
 	if (i2c->dev_comp->timing_adjust)
-		writew(I2C_DEFAULT_CLK_DIV - 1, i2c->base + OFFSET_CLOCK_DIV);
+		mtk_i2c_writew(i2c, I2C_DEFAULT_CLK_DIV - 1, OFFSET_CLOCK_DIV);
 
-	writew(i2c->timing_reg, i2c->base + OFFSET_TIMING);
-	writew(i2c->high_speed_reg, i2c->base + OFFSET_HS);
+	mtk_i2c_writew(i2c, i2c->timing_reg, OFFSET_TIMING);
+	mtk_i2c_writew(i2c, i2c->high_speed_reg, OFFSET_HS);
 
 	/* If use i2c pin from PMIC mt6397 side, need set PATH_DIR first */
 	if (i2c->have_pmic)
-		writew(I2C_CONTROL_WRAPPER, i2c->base + OFFSET_PATH_DIR);
+		mtk_i2c_writew(i2c, I2C_CONTROL_WRAPPER, OFFSET_PATH_DIR);
 
 	control_reg = I2C_CONTROL_ACKERR_DET_EN |
 		      I2C_CONTROL_CLK_EXT_EN | I2C_CONTROL_DMA_EN;
-	writew(control_reg, i2c->base + OFFSET_CONTROL);
-	writew(I2C_DELAY_LEN, i2c->base + OFFSET_DELAY_LEN);
+	mtk_i2c_writew(i2c, control_reg, OFFSET_CONTROL);
+	mtk_i2c_writew(i2c, I2C_DELAY_LEN, OFFSET_DELAY_LEN);
 
 	writel(I2C_DMA_HARD_RST, i2c->pdmabase + OFFSET_RST);
 	udelay(50);
@@ -454,7 +498,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 
 	reinit_completion(&i2c->msg_complete);
 
-	control_reg = readw(i2c->base + OFFSET_CONTROL) &
+	control_reg = mtk_i2c_readw(i2c, OFFSET_CONTROL) &
 			~(I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS);
 	if ((i2c->speed_hz > MAX_FS_MODE_SPEED) || (left_num >= 1))
 		control_reg |= I2C_CONTROL_RS;
@@ -462,40 +506,41 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 	if (i2c->op == I2C_MASTER_WRRD)
 		control_reg |= I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS;
 
-	writew(control_reg, i2c->base + OFFSET_CONTROL);
+	mtk_i2c_writew(i2c, control_reg, OFFSET_CONTROL);
 
 	/* set start condition */
 	if (i2c->speed_hz <= I2C_DEFAULT_SPEED)
-		writew(I2C_ST_START_CON, i2c->base + OFFSET_EXT_CONF);
+		mtk_i2c_writew(i2c, I2C_ST_START_CON, OFFSET_EXT_CONF);
 	else
-		writew(I2C_FS_START_CON, i2c->base + OFFSET_EXT_CONF);
+		mtk_i2c_writew(i2c, I2C_FS_START_CON, OFFSET_EXT_CONF);
 
 	addr_reg = i2c_8bit_addr_from_msg(msgs);
-	writew(addr_reg, i2c->base + OFFSET_SLAVE_ADDR);
+	mtk_i2c_writew(i2c, addr_reg, OFFSET_SLAVE_ADDR);
 
 	/* Clear interrupt status */
-	writew(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
-	       I2C_TRANSAC_COMP, i2c->base + OFFSET_INTR_STAT);
-	writew(I2C_FIFO_ADDR_CLR, i2c->base + OFFSET_FIFO_ADDR_CLR);
+	mtk_i2c_writew(i2c, restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
+	       I2C_TRANSAC_COMP, OFFSET_INTR_STAT);
+
+	mtk_i2c_writew(i2c, I2C_FIFO_ADDR_CLR, OFFSET_FIFO_ADDR_CLR);
 
 	/* Enable interrupt */
-	writew(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
-	       I2C_TRANSAC_COMP, i2c->base + OFFSET_INTR_MASK);
+	mtk_i2c_writew(i2c, restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
+	       I2C_TRANSAC_COMP, OFFSET_INTR_MASK);
 
 	/* Set transfer and transaction len */
 	if (i2c->op == I2C_MASTER_WRRD) {
 		if (i2c->dev_comp->aux_len_reg) {
-			writew(msgs->len, i2c->base + OFFSET_TRANSFER_LEN);
-			writew((msgs + 1)->len, i2c->base +
-			       OFFSET_TRANSFER_LEN_AUX);
+			mtk_i2c_writew(i2c, msgs->len, OFFSET_TRANSFER_LEN);
+			mtk_i2c_writew(i2c, (msgs + 1)->len,
+					    OFFSET_TRANSFER_LEN_AUX);
 		} else {
-			writew(msgs->len | ((msgs + 1)->len) << 8,
-			       i2c->base + OFFSET_TRANSFER_LEN);
+			mtk_i2c_writew(i2c, msgs->len | ((msgs + 1)->len) << 8,
+					    OFFSET_TRANSFER_LEN);
 		}
-		writew(I2C_WRRD_TRANAC_VALUE, i2c->base + OFFSET_TRANSAC_LEN);
+		mtk_i2c_writew(i2c, I2C_WRRD_TRANAC_VALUE, OFFSET_TRANSAC_LEN);
 	} else {
-		writew(msgs->len, i2c->base + OFFSET_TRANSFER_LEN);
-		writew(num, i2c->base + OFFSET_TRANSAC_LEN);
+		mtk_i2c_writew(i2c, msgs->len, OFFSET_TRANSFER_LEN);
+		mtk_i2c_writew(i2c, num, OFFSET_TRANSAC_LEN);
 	}
 
 	/* Prepare buffer data to start transfer */
@@ -607,14 +652,14 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 		if (left_num >= 1)
 			start_reg |= I2C_RS_MUL_CNFG;
 	}
-	writew(start_reg, i2c->base + OFFSET_START);
+	mtk_i2c_writew(i2c, start_reg, OFFSET_START);
 
 	ret = wait_for_completion_timeout(&i2c->msg_complete,
 					  i2c->adap.timeout);
 
 	/* Clear interrupt mask */
-	writew(~(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
-	       I2C_TRANSAC_COMP), i2c->base + OFFSET_INTR_MASK);
+	mtk_i2c_writew(i2c, ~(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
+	       I2C_TRANSAC_COMP), OFFSET_INTR_MASK);
 
 	if (i2c->op == I2C_MASTER_WR) {
 		dma_unmap_single(i2c->dev, wpaddr,
@@ -724,8 +769,8 @@ static irqreturn_t mtk_i2c_irq(int irqno, void *dev_id)
 	if (i2c->auto_restart)
 		restart_flag = I2C_RS_TRANSFER;
 
-	intr_stat = readw(i2c->base + OFFSET_INTR_STAT);
-	writew(intr_stat, i2c->base + OFFSET_INTR_STAT);
+	intr_stat = mtk_i2c_readw(i2c, OFFSET_INTR_STAT);
+	mtk_i2c_writew(i2c, intr_stat, OFFSET_INTR_STAT);
 
 	/*
 	 * when occurs ack error, i2c controller generate two interrupts
@@ -737,8 +782,8 @@ static irqreturn_t mtk_i2c_irq(int irqno, void *dev_id)
 	if (i2c->ignore_restart_irq && (i2c->irq_stat & restart_flag)) {
 		i2c->ignore_restart_irq = false;
 		i2c->irq_stat = 0;
-		writew(I2C_RS_MUL_CNFG | I2C_RS_MUL_TRIG | I2C_TRANSAC_START,
-		       i2c->base + OFFSET_START);
+		mtk_i2c_writew(i2c, I2C_RS_MUL_CNFG | I2C_RS_MUL_TRIG |
+				    I2C_TRANSAC_START, OFFSET_START);
 	} else {
 		if (i2c->irq_stat & (I2C_TRANSAC_COMP | restart_flag))
 			complete(&i2c->msg_complete);
-- 
1.7.9.5

[PATCH 4/6] i2c: mediatek: Add offsets array for new i2c registers

[qii wang]

New i2c registers would have different offsets, so we use different
offsets array to distinguish different i2c registers version.

Signed-off-by: qii wang <qii.wang@mediatek.com>
---
 drivers/i2c/busses/i2c-mt65xx.c |  163 +++++++++++++++++++++++++--------------
 1 file changed, 104 insertions(+), 59 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index 660de1e..428ac99 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -106,34 +106,62 @@ enum mtk_trans_op {
 };
 
 enum I2C_REGS_OFFSET {
-	OFFSET_DATA_PORT = 0x0,
-	OFFSET_SLAVE_ADDR = 0x04,
-	OFFSET_INTR_MASK = 0x08,
-	OFFSET_INTR_STAT = 0x0c,
-	OFFSET_CONTROL = 0x10,
-	OFFSET_TRANSFER_LEN = 0x14,
-	OFFSET_TRANSAC_LEN = 0x18,
-	OFFSET_DELAY_LEN = 0x1c,
-	OFFSET_TIMING = 0x20,
-	OFFSET_START = 0x24,
-	OFFSET_EXT_CONF = 0x28,
-	OFFSET_FIFO_STAT = 0x30,
-	OFFSET_FIFO_THRESH = 0x34,
-	OFFSET_FIFO_ADDR_CLR = 0x38,
-	OFFSET_IO_CONFIG = 0x40,
-	OFFSET_RSV_DEBUG = 0x44,
-	OFFSET_HS = 0x48,
-	OFFSET_SOFTRESET = 0x50,
-	OFFSET_DCM_EN = 0x54,
-	OFFSET_PATH_DIR = 0x60,
-	OFFSET_DEBUGSTAT = 0x64,
-	OFFSET_DEBUGCTRL = 0x68,
-	OFFSET_TRANSFER_LEN_AUX = 0x6c,
-	OFFSET_CLOCK_DIV = 0x70,
+	OFFSET_DATA_PORT,
+	OFFSET_SLAVE_ADDR,
+	OFFSET_INTR_MASK,
+	OFFSET_INTR_STAT,
+	OFFSET_CONTROL,
+	OFFSET_TRANSFER_LEN,
+	OFFSET_TRANSAC_LEN,
+	OFFSET_DELAY_LEN,
+	OFFSET_TIMING,
+	OFFSET_START,
+	OFFSET_EXT_CONF,
+	OFFSET_FIFO_STAT,
+	OFFSET_FIFO_THRESH,
+	OFFSET_FIFO_ADDR_CLR,
+	OFFSET_IO_CONFIG,
+	OFFSET_RSV_DEBUG,
+	OFFSET_HS,
+	OFFSET_SOFTRESET,
+	OFFSET_DCM_EN,
+	OFFSET_PATH_DIR,
+	OFFSET_DEBUGSTAT,
+	OFFSET_DEBUGCTRL,
+	OFFSET_TRANSFER_LEN_AUX,
+	OFFSET_CLOCK_DIV,
+};
+
+static const u16 mt_i2c_regs_v1[] = {
+	[OFFSET_DATA_PORT] = 0x0,
+	[OFFSET_SLAVE_ADDR] = 0x4,
+	[OFFSET_INTR_MASK] = 0x8,
+	[OFFSET_INTR_STAT] = 0xc,
+	[OFFSET_CONTROL] = 0x10,
+	[OFFSET_TRANSFER_LEN] = 0x14,
+	[OFFSET_TRANSAC_LEN] = 0x18,
+	[OFFSET_DELAY_LEN] = 0x1c,
+	[OFFSET_TIMING] = 0x20,
+	[OFFSET_START] = 0x24,
+	[OFFSET_EXT_CONF] = 0x28,
+	[OFFSET_FIFO_STAT] = 0x30,
+	[OFFSET_FIFO_THRESH] = 0x34,
+	[OFFSET_FIFO_ADDR_CLR] = 0x38,
+	[OFFSET_IO_CONFIG] = 0x40,
+	[OFFSET_RSV_DEBUG] = 0x44,
+	[OFFSET_HS] = 0x48,
+	[OFFSET_SOFTRESET] = 0x50,
+	[OFFSET_DCM_EN] = 0x54,
+	[OFFSET_PATH_DIR] = 0x60,
+	[OFFSET_DEBUGSTAT] = 0x64,
+	[OFFSET_DEBUGCTRL] = 0x68,
+	[OFFSET_TRANSFER_LEN_AUX] = 0x6c,
+	[OFFSET_CLOCK_DIV] = 0x70,
 };
 
 struct mtk_i2c_compatible {
 	const struct i2c_adapter_quirks *quirks;
+	const u16 *regs;
 	unsigned char pmic_i2c: 1;
 	unsigned char dcm: 1;
 	unsigned char auto_restart: 1;
@@ -181,6 +209,7 @@ struct mtk_i2c {
 };
 
 static const struct mtk_i2c_compatible mt2712_compat = {
+	.regs = mt_i2c_regs_v1,
 	.pmic_i2c = 0,
 	.dcm = 1,
 	.auto_restart = 1,
@@ -191,6 +220,7 @@ struct mtk_i2c {
 
 static const struct mtk_i2c_compatible mt6577_compat = {
 	.quirks = &mt6577_i2c_quirks,
+	.regs = mt_i2c_regs_v1,
 	.pmic_i2c = 0,
 	.dcm = 1,
 	.auto_restart = 0,
@@ -201,6 +231,7 @@ struct mtk_i2c {
 
 static const struct mtk_i2c_compatible mt6589_compat = {
 	.quirks = &mt6577_i2c_quirks,
+	.regs = mt_i2c_regs_v1,
 	.pmic_i2c = 1,
 	.dcm = 0,
 	.auto_restart = 0,
@@ -211,6 +242,7 @@ struct mtk_i2c {
 
 static const struct mtk_i2c_compatible mt7622_compat = {
 	.quirks = &mt7622_i2c_quirks,
+	.regs = mt_i2c_regs_v1,
 	.pmic_i2c = 0,
 	.dcm = 1,
 	.auto_restart = 1,
@@ -220,6 +252,7 @@ struct mtk_i2c {
 };
 
 static const struct mtk_i2c_compatible mt8173_compat = {
+	.regs = mt_i2c_regs_v1,
 	.pmic_i2c = 0,
 	.dcm = 1,
 	.auto_restart = 1,
@@ -238,6 +271,17 @@ struct mtk_i2c {
 };
 MODULE_DEVICE_TABLE(of, mtk_i2c_of_match);
 
+static u16 mtk_i2c_readw(struct mtk_i2c *i2c, enum I2C_REGS_OFFSET reg)
+{
+	return readw(i2c->base + i2c->dev_comp->regs[reg]);
+}
+
+static void mtk_i2c_writew(struct mtk_i2c *i2c, u16 val,
+			   enum I2C_REGS_OFFSET reg)
+{
+	writew(val, i2c->base + i2c->dev_comp->regs[reg]);
+}
+
 static int mtk_i2c_clock_enable(struct mtk_i2c *i2c)
 {
 	int ret;
@@ -278,31 +322,31 @@ static void mtk_i2c_init_hw(struct mtk_i2c *i2c)
 {
 	u16 control_reg;
 
-	writew(I2C_SOFT_RST, i2c->base + OFFSET_SOFTRESET);
+	mtk_i2c_writew(i2c, I2C_SOFT_RST, OFFSET_SOFTRESET);
 
 	/* Set ioconfig */
 	if (i2c->use_push_pull)
-		writew(I2C_IO_CONFIG_PUSH_PULL, i2c->base + OFFSET_IO_CONFIG);
+		mtk_i2c_writew(i2c, I2C_IO_CONFIG_PUSH_PULL, OFFSET_IO_CONFIG);
 	else
-		writew(I2C_IO_CONFIG_OPEN_DRAIN, i2c->base + OFFSET_IO_CONFIG);
+		mtk_i2c_writew(i2c, I2C_IO_CONFIG_OPEN_DRAIN, OFFSET_IO_CONFIG);
 
 	if (i2c->dev_comp->dcm)
-		writew(I2C_DCM_DISABLE, i2c->base + OFFSET_DCM_EN);
+		mtk_i2c_writew(i2c, I2C_DCM_DISABLE, OFFSET_DCM_EN);
 
 	if (i2c->dev_comp->timing_adjust)
-		writew(I2C_DEFAULT_CLK_DIV - 1, i2c->base + OFFSET_CLOCK_DIV);
+		mtk_i2c_writew(i2c, I2C_DEFAULT_CLK_DIV - 1, OFFSET_CLOCK_DIV);
 
-	writew(i2c->timing_reg, i2c->base + OFFSET_TIMING);
-	writew(i2c->high_speed_reg, i2c->base + OFFSET_HS);
+	mtk_i2c_writew(i2c, i2c->timing_reg, OFFSET_TIMING);
+	mtk_i2c_writew(i2c, i2c->high_speed_reg, OFFSET_HS);
 
 	/* If use i2c pin from PMIC mt6397 side, need set PATH_DIR first */
 	if (i2c->have_pmic)
-		writew(I2C_CONTROL_WRAPPER, i2c->base + OFFSET_PATH_DIR);
+		mtk_i2c_writew(i2c, I2C_CONTROL_WRAPPER, OFFSET_PATH_DIR);
 
 	control_reg = I2C_CONTROL_ACKERR_DET_EN |
 		      I2C_CONTROL_CLK_EXT_EN | I2C_CONTROL_DMA_EN;
-	writew(control_reg, i2c->base + OFFSET_CONTROL);
-	writew(I2C_DELAY_LEN, i2c->base + OFFSET_DELAY_LEN);
+	mtk_i2c_writew(i2c, control_reg, OFFSET_CONTROL);
+	mtk_i2c_writew(i2c, I2C_DELAY_LEN, OFFSET_DELAY_LEN);
 
 	writel(I2C_DMA_HARD_RST, i2c->pdmabase + OFFSET_RST);
 	udelay(50);
@@ -454,7 +498,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 
 	reinit_completion(&i2c->msg_complete);
 
-	control_reg = readw(i2c->base + OFFSET_CONTROL) &
+	control_reg = mtk_i2c_readw(i2c, OFFSET_CONTROL) &
 			~(I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS);
 	if ((i2c->speed_hz > MAX_FS_MODE_SPEED) || (left_num >= 1))
 		control_reg |= I2C_CONTROL_RS;
@@ -462,40 +506,41 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 	if (i2c->op == I2C_MASTER_WRRD)
 		control_reg |= I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS;
 
-	writew(control_reg, i2c->base + OFFSET_CONTROL);
+	mtk_i2c_writew(i2c, control_reg, OFFSET_CONTROL);
 
 	/* set start condition */
 	if (i2c->speed_hz <= I2C_DEFAULT_SPEED)
-		writew(I2C_ST_START_CON, i2c->base + OFFSET_EXT_CONF);
+		mtk_i2c_writew(i2c, I2C_ST_START_CON, OFFSET_EXT_CONF);
 	else
-		writew(I2C_FS_START_CON, i2c->base + OFFSET_EXT_CONF);
+		mtk_i2c_writew(i2c, I2C_FS_START_CON, OFFSET_EXT_CONF);
 
 	addr_reg = i2c_8bit_addr_from_msg(msgs);
-	writew(addr_reg, i2c->base + OFFSET_SLAVE_ADDR);
+	mtk_i2c_writew(i2c, addr_reg, OFFSET_SLAVE_ADDR);
 
 	/* Clear interrupt status */
-	writew(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
-	       I2C_TRANSAC_COMP, i2c->base + OFFSET_INTR_STAT);
-	writew(I2C_FIFO_ADDR_CLR, i2c->base + OFFSET_FIFO_ADDR_CLR);
+	mtk_i2c_writew(i2c, restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
+	       I2C_TRANSAC_COMP, OFFSET_INTR_STAT);
+
+	mtk_i2c_writew(i2c, I2C_FIFO_ADDR_CLR, OFFSET_FIFO_ADDR_CLR);
 
 	/* Enable interrupt */
-	writew(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
-	       I2C_TRANSAC_COMP, i2c->base + OFFSET_INTR_MASK);
+	mtk_i2c_writew(i2c, restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
+	       I2C_TRANSAC_COMP, OFFSET_INTR_MASK);
 
 	/* Set transfer and transaction len */
 	if (i2c->op == I2C_MASTER_WRRD) {
 		if (i2c->dev_comp->aux_len_reg) {
-			writew(msgs->len, i2c->base + OFFSET_TRANSFER_LEN);
-			writew((msgs + 1)->len, i2c->base +
-			       OFFSET_TRANSFER_LEN_AUX);
+			mtk_i2c_writew(i2c, msgs->len, OFFSET_TRANSFER_LEN);
+			mtk_i2c_writew(i2c, (msgs + 1)->len,
+					    OFFSET_TRANSFER_LEN_AUX);
 		} else {
-			writew(msgs->len | ((msgs + 1)->len) << 8,
-			       i2c->base + OFFSET_TRANSFER_LEN);
+			mtk_i2c_writew(i2c, msgs->len | ((msgs + 1)->len) << 8,
+					    OFFSET_TRANSFER_LEN);
 		}
-		writew(I2C_WRRD_TRANAC_VALUE, i2c->base + OFFSET_TRANSAC_LEN);
+		mtk_i2c_writew(i2c, I2C_WRRD_TRANAC_VALUE, OFFSET_TRANSAC_LEN);
 	} else {
-		writew(msgs->len, i2c->base + OFFSET_TRANSFER_LEN);
-		writew(num, i2c->base + OFFSET_TRANSAC_LEN);
+		mtk_i2c_writew(i2c, msgs->len, OFFSET_TRANSFER_LEN);
+		mtk_i2c_writew(i2c, num, OFFSET_TRANSAC_LEN);
 	}
 
 	/* Prepare buffer data to start transfer */
@@ -607,14 +652,14 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 		if (left_num >= 1)
 			start_reg |= I2C_RS_MUL_CNFG;
 	}
-	writew(start_reg, i2c->base + OFFSET_START);
+	mtk_i2c_writew(i2c, start_reg, OFFSET_START);
 
 	ret = wait_for_completion_timeout(&i2c->msg_complete,
 					  i2c->adap.timeout);
 
 	/* Clear interrupt mask */
-	writew(~(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
-	       I2C_TRANSAC_COMP), i2c->base + OFFSET_INTR_MASK);
+	mtk_i2c_writew(i2c, ~(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
+	       I2C_TRANSAC_COMP), OFFSET_INTR_MASK);
 
 	if (i2c->op == I2C_MASTER_WR) {
 		dma_unmap_single(i2c->dev, wpaddr,
@@ -724,8 +769,8 @@ static irqreturn_t mtk_i2c_irq(int irqno, void *dev_id)
 	if (i2c->auto_restart)
 		restart_flag = I2C_RS_TRANSFER;
 
-	intr_stat = readw(i2c->base + OFFSET_INTR_STAT);
-	writew(intr_stat, i2c->base + OFFSET_INTR_STAT);
+	intr_stat = mtk_i2c_readw(i2c, OFFSET_INTR_STAT);
+	mtk_i2c_writew(i2c, intr_stat, OFFSET_INTR_STAT);
 
 	/*
 	 * when occurs ack error, i2c controller generate two interrupts
@@ -737,8 +782,8 @@ static irqreturn_t mtk_i2c_irq(int irqno, void *dev_id)
 	if (i2c->ignore_restart_irq && (i2c->irq_stat & restart_flag)) {
 		i2c->ignore_restart_irq = false;
 		i2c->irq_stat = 0;
-		writew(I2C_RS_MUL_CNFG | I2C_RS_MUL_TRIG | I2C_TRANSAC_START,
-		       i2c->base + OFFSET_START);
+		mtk_i2c_writew(i2c, I2C_RS_MUL_CNFG | I2C_RS_MUL_TRIG |
+				    I2C_TRANSAC_START, OFFSET_START);
 	} else {
 		if (i2c->irq_stat & (I2C_TRANSAC_COMP | restart_flag))
 			complete(&i2c->msg_complete);
-- 
1.7.9.5


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Re: [PATCH 4/6] i2c: mediatek: Add offsets array for new i2c registers

[Nicolas Boichat]

On Fri, Dec 21, 2018 at 8:59 PM qii wang <qii.wang@mediatek.com> wrote:
>
> New i2c registers would have different offsets, so we use different
> offsets array to distinguish different i2c registers version.
>
> Signed-off-by: qii wang <qii.wang@mediatek.com>

Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>

> ---
>  drivers/i2c/busses/i2c-mt65xx.c |  163 +++++++++++++++++++++++++--------------
>  1 file changed, 104 insertions(+), 59 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
> index 660de1e..428ac99 100644
> --- a/drivers/i2c/busses/i2c-mt65xx.c
> +++ b/drivers/i2c/busses/i2c-mt65xx.c
> @@ -106,34 +106,62 @@ enum mtk_trans_op {
>  };
>
>  enum I2C_REGS_OFFSET {
> -       OFFSET_DATA_PORT = 0x0,
> -       OFFSET_SLAVE_ADDR = 0x04,
> -       OFFSET_INTR_MASK = 0x08,
> -       OFFSET_INTR_STAT = 0x0c,
> -       OFFSET_CONTROL = 0x10,
> -       OFFSET_TRANSFER_LEN = 0x14,
> -       OFFSET_TRANSAC_LEN = 0x18,
> -       OFFSET_DELAY_LEN = 0x1c,
> -       OFFSET_TIMING = 0x20,
> -       OFFSET_START = 0x24,
> -       OFFSET_EXT_CONF = 0x28,
> -       OFFSET_FIFO_STAT = 0x30,
> -       OFFSET_FIFO_THRESH = 0x34,
> -       OFFSET_FIFO_ADDR_CLR = 0x38,
> -       OFFSET_IO_CONFIG = 0x40,
> -       OFFSET_RSV_DEBUG = 0x44,
> -       OFFSET_HS = 0x48,
> -       OFFSET_SOFTRESET = 0x50,
> -       OFFSET_DCM_EN = 0x54,
> -       OFFSET_PATH_DIR = 0x60,
> -       OFFSET_DEBUGSTAT = 0x64,
> -       OFFSET_DEBUGCTRL = 0x68,
> -       OFFSET_TRANSFER_LEN_AUX = 0x6c,
> -       OFFSET_CLOCK_DIV = 0x70,
> +       OFFSET_DATA_PORT,
> +       OFFSET_SLAVE_ADDR,
> +       OFFSET_INTR_MASK,
> +       OFFSET_INTR_STAT,
> +       OFFSET_CONTROL,
> +       OFFSET_TRANSFER_LEN,
> +       OFFSET_TRANSAC_LEN,
> +       OFFSET_DELAY_LEN,
> +       OFFSET_TIMING,
> +       OFFSET_START,
> +       OFFSET_EXT_CONF,
> +       OFFSET_FIFO_STAT,
> +       OFFSET_FIFO_THRESH,
> +       OFFSET_FIFO_ADDR_CLR,
> +       OFFSET_IO_CONFIG,
> +       OFFSET_RSV_DEBUG,
> +       OFFSET_HS,
> +       OFFSET_SOFTRESET,
> +       OFFSET_DCM_EN,
> +       OFFSET_PATH_DIR,
> +       OFFSET_DEBUGSTAT,
> +       OFFSET_DEBUGCTRL,
> +       OFFSET_TRANSFER_LEN_AUX,
> +       OFFSET_CLOCK_DIV,
> +};
> +
> +static const u16 mt_i2c_regs_v1[] = {
> +       [OFFSET_DATA_PORT] = 0x0,
> +       [OFFSET_SLAVE_ADDR] = 0x4,
> +       [OFFSET_INTR_MASK] = 0x8,
> +       [OFFSET_INTR_STAT] = 0xc,
> +       [OFFSET_CONTROL] = 0x10,
> +       [OFFSET_TRANSFER_LEN] = 0x14,
> +       [OFFSET_TRANSAC_LEN] = 0x18,
> +       [OFFSET_DELAY_LEN] = 0x1c,
> +       [OFFSET_TIMING] = 0x20,
> +       [OFFSET_START] = 0x24,
> +       [OFFSET_EXT_CONF] = 0x28,
> +       [OFFSET_FIFO_STAT] = 0x30,
> +       [OFFSET_FIFO_THRESH] = 0x34,
> +       [OFFSET_FIFO_ADDR_CLR] = 0x38,
> +       [OFFSET_IO_CONFIG] = 0x40,
> +       [OFFSET_RSV_DEBUG] = 0x44,
> +       [OFFSET_HS] = 0x48,
> +       [OFFSET_SOFTRESET] = 0x50,
> +       [OFFSET_DCM_EN] = 0x54,
> +       [OFFSET_PATH_DIR] = 0x60,
> +       [OFFSET_DEBUGSTAT] = 0x64,
> +       [OFFSET_DEBUGCTRL] = 0x68,
> +       [OFFSET_TRANSFER_LEN_AUX] = 0x6c,
> +       [OFFSET_CLOCK_DIV] = 0x70,
>  };
>
>  struct mtk_i2c_compatible {
>         const struct i2c_adapter_quirks *quirks;
> +       const u16 *regs;
>         unsigned char pmic_i2c: 1;
>         unsigned char dcm: 1;
>         unsigned char auto_restart: 1;
> @@ -181,6 +209,7 @@ struct mtk_i2c {
>  };
>
>  static const struct mtk_i2c_compatible mt2712_compat = {
> +       .regs = mt_i2c_regs_v1,
>         .pmic_i2c = 0,
>         .dcm = 1,
>         .auto_restart = 1,
> @@ -191,6 +220,7 @@ struct mtk_i2c {
>
>  static const struct mtk_i2c_compatible mt6577_compat = {
>         .quirks = &mt6577_i2c_quirks,
> +       .regs = mt_i2c_regs_v1,
>         .pmic_i2c = 0,
>         .dcm = 1,
>         .auto_restart = 0,
> @@ -201,6 +231,7 @@ struct mtk_i2c {
>
>  static const struct mtk_i2c_compatible mt6589_compat = {
>         .quirks = &mt6577_i2c_quirks,
> +       .regs = mt_i2c_regs_v1,
>         .pmic_i2c = 1,
>         .dcm = 0,
>         .auto_restart = 0,
> @@ -211,6 +242,7 @@ struct mtk_i2c {
>
>  static const struct mtk_i2c_compatible mt7622_compat = {
>         .quirks = &mt7622_i2c_quirks,
> +       .regs = mt_i2c_regs_v1,
>         .pmic_i2c = 0,
>         .dcm = 1,
>         .auto_restart = 1,
> @@ -220,6 +252,7 @@ struct mtk_i2c {
>  };
>
>  static const struct mtk_i2c_compatible mt8173_compat = {
> +       .regs = mt_i2c_regs_v1,
>         .pmic_i2c = 0,
>         .dcm = 1,
>         .auto_restart = 1,
> @@ -238,6 +271,17 @@ struct mtk_i2c {
>  };
>  MODULE_DEVICE_TABLE(of, mtk_i2c_of_match);
>
> +static u16 mtk_i2c_readw(struct mtk_i2c *i2c, enum I2C_REGS_OFFSET reg)
> +{
> +       return readw(i2c->base + i2c->dev_comp->regs[reg]);
> +}
> +
> +static void mtk_i2c_writew(struct mtk_i2c *i2c, u16 val,
> +                          enum I2C_REGS_OFFSET reg)
> +{
> +       writew(val, i2c->base + i2c->dev_comp->regs[reg]);
> +}
> +
>  static int mtk_i2c_clock_enable(struct mtk_i2c *i2c)
>  {
>         int ret;
> @@ -278,31 +322,31 @@ static void mtk_i2c_init_hw(struct mtk_i2c *i2c)
>  {
>         u16 control_reg;
>
> -       writew(I2C_SOFT_RST, i2c->base + OFFSET_SOFTRESET);
> +       mtk_i2c_writew(i2c, I2C_SOFT_RST, OFFSET_SOFTRESET);
>
>         /* Set ioconfig */
>         if (i2c->use_push_pull)
> -               writew(I2C_IO_CONFIG_PUSH_PULL, i2c->base + OFFSET_IO_CONFIG);
> +               mtk_i2c_writew(i2c, I2C_IO_CONFIG_PUSH_PULL, OFFSET_IO_CONFIG);
>         else
> -               writew(I2C_IO_CONFIG_OPEN_DRAIN, i2c->base + OFFSET_IO_CONFIG);
> +               mtk_i2c_writew(i2c, I2C_IO_CONFIG_OPEN_DRAIN, OFFSET_IO_CONFIG);
>
>         if (i2c->dev_comp->dcm)
> -               writew(I2C_DCM_DISABLE, i2c->base + OFFSET_DCM_EN);
> +               mtk_i2c_writew(i2c, I2C_DCM_DISABLE, OFFSET_DCM_EN);
>
>         if (i2c->dev_comp->timing_adjust)
> -               writew(I2C_DEFAULT_CLK_DIV - 1, i2c->base + OFFSET_CLOCK_DIV);
> +               mtk_i2c_writew(i2c, I2C_DEFAULT_CLK_DIV - 1, OFFSET_CLOCK_DIV);
>
> -       writew(i2c->timing_reg, i2c->base + OFFSET_TIMING);
> -       writew(i2c->high_speed_reg, i2c->base + OFFSET_HS);
> +       mtk_i2c_writew(i2c, i2c->timing_reg, OFFSET_TIMING);
> +       mtk_i2c_writew(i2c, i2c->high_speed_reg, OFFSET_HS);
>
>         /* If use i2c pin from PMIC mt6397 side, need set PATH_DIR first */
>         if (i2c->have_pmic)
> -               writew(I2C_CONTROL_WRAPPER, i2c->base + OFFSET_PATH_DIR);
> +               mtk_i2c_writew(i2c, I2C_CONTROL_WRAPPER, OFFSET_PATH_DIR);
>
>         control_reg = I2C_CONTROL_ACKERR_DET_EN |
>                       I2C_CONTROL_CLK_EXT_EN | I2C_CONTROL_DMA_EN;
> -       writew(control_reg, i2c->base + OFFSET_CONTROL);
> -       writew(I2C_DELAY_LEN, i2c->base + OFFSET_DELAY_LEN);
> +       mtk_i2c_writew(i2c, control_reg, OFFSET_CONTROL);
> +       mtk_i2c_writew(i2c, I2C_DELAY_LEN, OFFSET_DELAY_LEN);
>
>         writel(I2C_DMA_HARD_RST, i2c->pdmabase + OFFSET_RST);
>         udelay(50);
> @@ -454,7 +498,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
>
>         reinit_completion(&i2c->msg_complete);
>
> -       control_reg = readw(i2c->base + OFFSET_CONTROL) &
> +       control_reg = mtk_i2c_readw(i2c, OFFSET_CONTROL) &
>                         ~(I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS);
>         if ((i2c->speed_hz > MAX_FS_MODE_SPEED) || (left_num >= 1))
>                 control_reg |= I2C_CONTROL_RS;
> @@ -462,40 +506,41 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
>         if (i2c->op == I2C_MASTER_WRRD)
>                 control_reg |= I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS;
>
> -       writew(control_reg, i2c->base + OFFSET_CONTROL);
> +       mtk_i2c_writew(i2c, control_reg, OFFSET_CONTROL);
>
>         /* set start condition */
>         if (i2c->speed_hz <= I2C_DEFAULT_SPEED)
> -               writew(I2C_ST_START_CON, i2c->base + OFFSET_EXT_CONF);
> +               mtk_i2c_writew(i2c, I2C_ST_START_CON, OFFSET_EXT_CONF);
>         else
> -               writew(I2C_FS_START_CON, i2c->base + OFFSET_EXT_CONF);
> +               mtk_i2c_writew(i2c, I2C_FS_START_CON, OFFSET_EXT_CONF);
>
>         addr_reg = i2c_8bit_addr_from_msg(msgs);
> -       writew(addr_reg, i2c->base + OFFSET_SLAVE_ADDR);
> +       mtk_i2c_writew(i2c, addr_reg, OFFSET_SLAVE_ADDR);
>
>         /* Clear interrupt status */
> -       writew(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
> -              I2C_TRANSAC_COMP, i2c->base + OFFSET_INTR_STAT);
> -       writew(I2C_FIFO_ADDR_CLR, i2c->base + OFFSET_FIFO_ADDR_CLR);
> +       mtk_i2c_writew(i2c, restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
> +              I2C_TRANSAC_COMP, OFFSET_INTR_STAT);
> +
> +       mtk_i2c_writew(i2c, I2C_FIFO_ADDR_CLR, OFFSET_FIFO_ADDR_CLR);
>
>         /* Enable interrupt */
> -       writew(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
> -              I2C_TRANSAC_COMP, i2c->base + OFFSET_INTR_MASK);
> +       mtk_i2c_writew(i2c, restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
> +              I2C_TRANSAC_COMP, OFFSET_INTR_MASK);
>
>         /* Set transfer and transaction len */
>         if (i2c->op == I2C_MASTER_WRRD) {
>                 if (i2c->dev_comp->aux_len_reg) {
> -                       writew(msgs->len, i2c->base + OFFSET_TRANSFER_LEN);
> -                       writew((msgs + 1)->len, i2c->base +
> -                              OFFSET_TRANSFER_LEN_AUX);
> +                       mtk_i2c_writew(i2c, msgs->len, OFFSET_TRANSFER_LEN);
> +                       mtk_i2c_writew(i2c, (msgs + 1)->len,
> +                                           OFFSET_TRANSFER_LEN_AUX);
>                 } else {
> -                       writew(msgs->len | ((msgs + 1)->len) << 8,
> -                              i2c->base + OFFSET_TRANSFER_LEN);
> +                       mtk_i2c_writew(i2c, msgs->len | ((msgs + 1)->len) << 8,
> +                                           OFFSET_TRANSFER_LEN);
>                 }
> -               writew(I2C_WRRD_TRANAC_VALUE, i2c->base + OFFSET_TRANSAC_LEN);
> +               mtk_i2c_writew(i2c, I2C_WRRD_TRANAC_VALUE, OFFSET_TRANSAC_LEN);
>         } else {
> -               writew(msgs->len, i2c->base + OFFSET_TRANSFER_LEN);
> -               writew(num, i2c->base + OFFSET_TRANSAC_LEN);
> +               mtk_i2c_writew(i2c, msgs->len, OFFSET_TRANSFER_LEN);
> +               mtk_i2c_writew(i2c, num, OFFSET_TRANSAC_LEN);
>         }
>
>         /* Prepare buffer data to start transfer */
> @@ -607,14 +652,14 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
>                 if (left_num >= 1)
>                         start_reg |= I2C_RS_MUL_CNFG;
>         }
> -       writew(start_reg, i2c->base + OFFSET_START);
> +       mtk_i2c_writew(i2c, start_reg, OFFSET_START);
>
>         ret = wait_for_completion_timeout(&i2c->msg_complete,
>                                           i2c->adap.timeout);
>
>         /* Clear interrupt mask */
> -       writew(~(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
> -              I2C_TRANSAC_COMP), i2c->base + OFFSET_INTR_MASK);
> +       mtk_i2c_writew(i2c, ~(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
> +              I2C_TRANSAC_COMP), OFFSET_INTR_MASK);
>
>         if (i2c->op == I2C_MASTER_WR) {
>                 dma_unmap_single(i2c->dev, wpaddr,
> @@ -724,8 +769,8 @@ static irqreturn_t mtk_i2c_irq(int irqno, void *dev_id)
>         if (i2c->auto_restart)
>                 restart_flag = I2C_RS_TRANSFER;
>
> -       intr_stat = readw(i2c->base + OFFSET_INTR_STAT);
> -       writew(intr_stat, i2c->base + OFFSET_INTR_STAT);
> +       intr_stat = mtk_i2c_readw(i2c, OFFSET_INTR_STAT);
> +       mtk_i2c_writew(i2c, intr_stat, OFFSET_INTR_STAT);
>
>         /*
>          * when occurs ack error, i2c controller generate two interrupts
> @@ -737,8 +782,8 @@ static irqreturn_t mtk_i2c_irq(int irqno, void *dev_id)
>         if (i2c->ignore_restart_irq && (i2c->irq_stat & restart_flag)) {
>                 i2c->ignore_restart_irq = false;
>                 i2c->irq_stat = 0;
> -               writew(I2C_RS_MUL_CNFG | I2C_RS_MUL_TRIG | I2C_TRANSAC_START,
> -                      i2c->base + OFFSET_START);
> +               mtk_i2c_writew(i2c, I2C_RS_MUL_CNFG | I2C_RS_MUL_TRIG |
> +                                   I2C_TRANSAC_START, OFFSET_START);
>         } else {
>                 if (i2c->irq_stat & (I2C_TRANSAC_COMP | restart_flag))
>                         complete(&i2c->msg_complete);
> --
> 1.7.9.5
>

Re: [PATCH 4/6] i2c: mediatek: Add offsets array for new i2c registers

[Nicolas Boichat]

On Fri, Dec 21, 2018 at 8:59 PM qii wang <qii.wang@mediatek.com> wrote:
>
> New i2c registers would have different offsets, so we use different
> offsets array to distinguish different i2c registers version.
>
> Signed-off-by: qii wang <qii.wang@mediatek.com>

Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>

> ---
>  drivers/i2c/busses/i2c-mt65xx.c |  163 +++++++++++++++++++++++++--------------
>  1 file changed, 104 insertions(+), 59 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
> index 660de1e..428ac99 100644
> --- a/drivers/i2c/busses/i2c-mt65xx.c
> +++ b/drivers/i2c/busses/i2c-mt65xx.c
> @@ -106,34 +106,62 @@ enum mtk_trans_op {
>  };
>
>  enum I2C_REGS_OFFSET {
> -       OFFSET_DATA_PORT = 0x0,
> -       OFFSET_SLAVE_ADDR = 0x04,
> -       OFFSET_INTR_MASK = 0x08,
> -       OFFSET_INTR_STAT = 0x0c,
> -       OFFSET_CONTROL = 0x10,
> -       OFFSET_TRANSFER_LEN = 0x14,
> -       OFFSET_TRANSAC_LEN = 0x18,
> -       OFFSET_DELAY_LEN = 0x1c,
> -       OFFSET_TIMING = 0x20,
> -       OFFSET_START = 0x24,
> -       OFFSET_EXT_CONF = 0x28,
> -       OFFSET_FIFO_STAT = 0x30,
> -       OFFSET_FIFO_THRESH = 0x34,
> -       OFFSET_FIFO_ADDR_CLR = 0x38,
> -       OFFSET_IO_CONFIG = 0x40,
> -       OFFSET_RSV_DEBUG = 0x44,
> -       OFFSET_HS = 0x48,
> -       OFFSET_SOFTRESET = 0x50,
> -       OFFSET_DCM_EN = 0x54,
> -       OFFSET_PATH_DIR = 0x60,
> -       OFFSET_DEBUGSTAT = 0x64,
> -       OFFSET_DEBUGCTRL = 0x68,
> -       OFFSET_TRANSFER_LEN_AUX = 0x6c,
> -       OFFSET_CLOCK_DIV = 0x70,
> +       OFFSET_DATA_PORT,
> +       OFFSET_SLAVE_ADDR,
> +       OFFSET_INTR_MASK,
> +       OFFSET_INTR_STAT,
> +       OFFSET_CONTROL,
> +       OFFSET_TRANSFER_LEN,
> +       OFFSET_TRANSAC_LEN,
> +       OFFSET_DELAY_LEN,
> +       OFFSET_TIMING,
> +       OFFSET_START,
> +       OFFSET_EXT_CONF,
> +       OFFSET_FIFO_STAT,
> +       OFFSET_FIFO_THRESH,
> +       OFFSET_FIFO_ADDR_CLR,
> +       OFFSET_IO_CONFIG,
> +       OFFSET_RSV_DEBUG,
> +       OFFSET_HS,
> +       OFFSET_SOFTRESET,
> +       OFFSET_DCM_EN,
> +       OFFSET_PATH_DIR,
> +       OFFSET_DEBUGSTAT,
> +       OFFSET_DEBUGCTRL,
> +       OFFSET_TRANSFER_LEN_AUX,
> +       OFFSET_CLOCK_DIV,
> +};
> +
> +static const u16 mt_i2c_regs_v1[] = {
> +       [OFFSET_DATA_PORT] = 0x0,
> +       [OFFSET_SLAVE_ADDR] = 0x4,
> +       [OFFSET_INTR_MASK] = 0x8,
> +       [OFFSET_INTR_STAT] = 0xc,
> +       [OFFSET_CONTROL] = 0x10,
> +       [OFFSET_TRANSFER_LEN] = 0x14,
> +       [OFFSET_TRANSAC_LEN] = 0x18,
> +       [OFFSET_DELAY_LEN] = 0x1c,
> +       [OFFSET_TIMING] = 0x20,
> +       [OFFSET_START] = 0x24,
> +       [OFFSET_EXT_CONF] = 0x28,
> +       [OFFSET_FIFO_STAT] = 0x30,
> +       [OFFSET_FIFO_THRESH] = 0x34,
> +       [OFFSET_FIFO_ADDR_CLR] = 0x38,
> +       [OFFSET_IO_CONFIG] = 0x40,
> +       [OFFSET_RSV_DEBUG] = 0x44,
> +       [OFFSET_HS] = 0x48,
> +       [OFFSET_SOFTRESET] = 0x50,
> +       [OFFSET_DCM_EN] = 0x54,
> +       [OFFSET_PATH_DIR] = 0x60,
> +       [OFFSET_DEBUGSTAT] = 0x64,
> +       [OFFSET_DEBUGCTRL] = 0x68,
> +       [OFFSET_TRANSFER_LEN_AUX] = 0x6c,
> +       [OFFSET_CLOCK_DIV] = 0x70,
>  };
>
>  struct mtk_i2c_compatible {
>         const struct i2c_adapter_quirks *quirks;
> +       const u16 *regs;
>         unsigned char pmic_i2c: 1;
>         unsigned char dcm: 1;
>         unsigned char auto_restart: 1;
> @@ -181,6 +209,7 @@ struct mtk_i2c {
>  };
>
>  static const struct mtk_i2c_compatible mt2712_compat = {
> +       .regs = mt_i2c_regs_v1,
>         .pmic_i2c = 0,
>         .dcm = 1,
>         .auto_restart = 1,
> @@ -191,6 +220,7 @@ struct mtk_i2c {
>
>  static const struct mtk_i2c_compatible mt6577_compat = {
>         .quirks = &mt6577_i2c_quirks,
> +       .regs = mt_i2c_regs_v1,
>         .pmic_i2c = 0,
>         .dcm = 1,
>         .auto_restart = 0,
> @@ -201,6 +231,7 @@ struct mtk_i2c {
>
>  static const struct mtk_i2c_compatible mt6589_compat = {
>         .quirks = &mt6577_i2c_quirks,
> +       .regs = mt_i2c_regs_v1,
>         .pmic_i2c = 1,
>         .dcm = 0,
>         .auto_restart = 0,
> @@ -211,6 +242,7 @@ struct mtk_i2c {
>
>  static const struct mtk_i2c_compatible mt7622_compat = {
>         .quirks = &mt7622_i2c_quirks,
> +       .regs = mt_i2c_regs_v1,
>         .pmic_i2c = 0,
>         .dcm = 1,
>         .auto_restart = 1,
> @@ -220,6 +252,7 @@ struct mtk_i2c {
>  };
>
>  static const struct mtk_i2c_compatible mt8173_compat = {
> +       .regs = mt_i2c_regs_v1,
>         .pmic_i2c = 0,
>         .dcm = 1,
>         .auto_restart = 1,
> @@ -238,6 +271,17 @@ struct mtk_i2c {
>  };
>  MODULE_DEVICE_TABLE(of, mtk_i2c_of_match);
>
> +static u16 mtk_i2c_readw(struct mtk_i2c *i2c, enum I2C_REGS_OFFSET reg)
> +{
> +       return readw(i2c->base + i2c->dev_comp->regs[reg]);
> +}
> +
> +static void mtk_i2c_writew(struct mtk_i2c *i2c, u16 val,
> +                          enum I2C_REGS_OFFSET reg)
> +{
> +       writew(val, i2c->base + i2c->dev_comp->regs[reg]);
> +}
> +
>  static int mtk_i2c_clock_enable(struct mtk_i2c *i2c)
>  {
>         int ret;
> @@ -278,31 +322,31 @@ static void mtk_i2c_init_hw(struct mtk_i2c *i2c)
>  {
>         u16 control_reg;
>
> -       writew(I2C_SOFT_RST, i2c->base + OFFSET_SOFTRESET);
> +       mtk_i2c_writew(i2c, I2C_SOFT_RST, OFFSET_SOFTRESET);
>
>         /* Set ioconfig */
>         if (i2c->use_push_pull)
> -               writew(I2C_IO_CONFIG_PUSH_PULL, i2c->base + OFFSET_IO_CONFIG);
> +               mtk_i2c_writew(i2c, I2C_IO_CONFIG_PUSH_PULL, OFFSET_IO_CONFIG);
>         else
> -               writew(I2C_IO_CONFIG_OPEN_DRAIN, i2c->base + OFFSET_IO_CONFIG);
> +               mtk_i2c_writew(i2c, I2C_IO_CONFIG_OPEN_DRAIN, OFFSET_IO_CONFIG);
>
>         if (i2c->dev_comp->dcm)
> -               writew(I2C_DCM_DISABLE, i2c->base + OFFSET_DCM_EN);
> +               mtk_i2c_writew(i2c, I2C_DCM_DISABLE, OFFSET_DCM_EN);
>
>         if (i2c->dev_comp->timing_adjust)
> -               writew(I2C_DEFAULT_CLK_DIV - 1, i2c->base + OFFSET_CLOCK_DIV);
> +               mtk_i2c_writew(i2c, I2C_DEFAULT_CLK_DIV - 1, OFFSET_CLOCK_DIV);
>
> -       writew(i2c->timing_reg, i2c->base + OFFSET_TIMING);
> -       writew(i2c->high_speed_reg, i2c->base + OFFSET_HS);
> +       mtk_i2c_writew(i2c, i2c->timing_reg, OFFSET_TIMING);
> +       mtk_i2c_writew(i2c, i2c->high_speed_reg, OFFSET_HS);
>
>         /* If use i2c pin from PMIC mt6397 side, need set PATH_DIR first */
>         if (i2c->have_pmic)
> -               writew(I2C_CONTROL_WRAPPER, i2c->base + OFFSET_PATH_DIR);
> +               mtk_i2c_writew(i2c, I2C_CONTROL_WRAPPER, OFFSET_PATH_DIR);
>
>         control_reg = I2C_CONTROL_ACKERR_DET_EN |
>                       I2C_CONTROL_CLK_EXT_EN | I2C_CONTROL_DMA_EN;
> -       writew(control_reg, i2c->base + OFFSET_CONTROL);
> -       writew(I2C_DELAY_LEN, i2c->base + OFFSET_DELAY_LEN);
> +       mtk_i2c_writew(i2c, control_reg, OFFSET_CONTROL);
> +       mtk_i2c_writew(i2c, I2C_DELAY_LEN, OFFSET_DELAY_LEN);
>
>         writel(I2C_DMA_HARD_RST, i2c->pdmabase + OFFSET_RST);
>         udelay(50);
> @@ -454,7 +498,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
>
>         reinit_completion(&i2c->msg_complete);
>
> -       control_reg = readw(i2c->base + OFFSET_CONTROL) &
> +       control_reg = mtk_i2c_readw(i2c, OFFSET_CONTROL) &
>                         ~(I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS);
>         if ((i2c->speed_hz > MAX_FS_MODE_SPEED) || (left_num >= 1))
>                 control_reg |= I2C_CONTROL_RS;
> @@ -462,40 +506,41 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
>         if (i2c->op == I2C_MASTER_WRRD)
>                 control_reg |= I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS;
>
> -       writew(control_reg, i2c->base + OFFSET_CONTROL);
> +       mtk_i2c_writew(i2c, control_reg, OFFSET_CONTROL);
>
>         /* set start condition */
>         if (i2c->speed_hz <= I2C_DEFAULT_SPEED)
> -               writew(I2C_ST_START_CON, i2c->base + OFFSET_EXT_CONF);
> +               mtk_i2c_writew(i2c, I2C_ST_START_CON, OFFSET_EXT_CONF);
>         else
> -               writew(I2C_FS_START_CON, i2c->base + OFFSET_EXT_CONF);
> +               mtk_i2c_writew(i2c, I2C_FS_START_CON, OFFSET_EXT_CONF);
>
>         addr_reg = i2c_8bit_addr_from_msg(msgs);
> -       writew(addr_reg, i2c->base + OFFSET_SLAVE_ADDR);
> +       mtk_i2c_writew(i2c, addr_reg, OFFSET_SLAVE_ADDR);
>
>         /* Clear interrupt status */
> -       writew(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
> -              I2C_TRANSAC_COMP, i2c->base + OFFSET_INTR_STAT);
> -       writew(I2C_FIFO_ADDR_CLR, i2c->base + OFFSET_FIFO_ADDR_CLR);
> +       mtk_i2c_writew(i2c, restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
> +              I2C_TRANSAC_COMP, OFFSET_INTR_STAT);
> +
> +       mtk_i2c_writew(i2c, I2C_FIFO_ADDR_CLR, OFFSET_FIFO_ADDR_CLR);
>
>         /* Enable interrupt */
> -       writew(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
> -              I2C_TRANSAC_COMP, i2c->base + OFFSET_INTR_MASK);
> +       mtk_i2c_writew(i2c, restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
> +              I2C_TRANSAC_COMP, OFFSET_INTR_MASK);
>
>         /* Set transfer and transaction len */
>         if (i2c->op == I2C_MASTER_WRRD) {
>                 if (i2c->dev_comp->aux_len_reg) {
> -                       writew(msgs->len, i2c->base + OFFSET_TRANSFER_LEN);
> -                       writew((msgs + 1)->len, i2c->base +
> -                              OFFSET_TRANSFER_LEN_AUX);
> +                       mtk_i2c_writew(i2c, msgs->len, OFFSET_TRANSFER_LEN);
> +                       mtk_i2c_writew(i2c, (msgs + 1)->len,
> +                                           OFFSET_TRANSFER_LEN_AUX);
>                 } else {
> -                       writew(msgs->len | ((msgs + 1)->len) << 8,
> -                              i2c->base + OFFSET_TRANSFER_LEN);
> +                       mtk_i2c_writew(i2c, msgs->len | ((msgs + 1)->len) << 8,
> +                                           OFFSET_TRANSFER_LEN);
>                 }
> -               writew(I2C_WRRD_TRANAC_VALUE, i2c->base + OFFSET_TRANSAC_LEN);
> +               mtk_i2c_writew(i2c, I2C_WRRD_TRANAC_VALUE, OFFSET_TRANSAC_LEN);
>         } else {
> -               writew(msgs->len, i2c->base + OFFSET_TRANSFER_LEN);
> -               writew(num, i2c->base + OFFSET_TRANSAC_LEN);
> +               mtk_i2c_writew(i2c, msgs->len, OFFSET_TRANSFER_LEN);
> +               mtk_i2c_writew(i2c, num, OFFSET_TRANSAC_LEN);
>         }
>
>         /* Prepare buffer data to start transfer */
> @@ -607,14 +652,14 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
>                 if (left_num >= 1)
>                         start_reg |= I2C_RS_MUL_CNFG;
>         }
> -       writew(start_reg, i2c->base + OFFSET_START);
> +       mtk_i2c_writew(i2c, start_reg, OFFSET_START);
>
>         ret = wait_for_completion_timeout(&i2c->msg_complete,
>                                           i2c->adap.timeout);
>
>         /* Clear interrupt mask */
> -       writew(~(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
> -              I2C_TRANSAC_COMP), i2c->base + OFFSET_INTR_MASK);
> +       mtk_i2c_writew(i2c, ~(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
> +              I2C_TRANSAC_COMP), OFFSET_INTR_MASK);
>
>         if (i2c->op == I2C_MASTER_WR) {
>                 dma_unmap_single(i2c->dev, wpaddr,
> @@ -724,8 +769,8 @@ static irqreturn_t mtk_i2c_irq(int irqno, void *dev_id)
>         if (i2c->auto_restart)
>                 restart_flag = I2C_RS_TRANSFER;
>
> -       intr_stat = readw(i2c->base + OFFSET_INTR_STAT);
> -       writew(intr_stat, i2c->base + OFFSET_INTR_STAT);
> +       intr_stat = mtk_i2c_readw(i2c, OFFSET_INTR_STAT);
> +       mtk_i2c_writew(i2c, intr_stat, OFFSET_INTR_STAT);
>
>         /*
>          * when occurs ack error, i2c controller generate two interrupts
> @@ -737,8 +782,8 @@ static irqreturn_t mtk_i2c_irq(int irqno, void *dev_id)
>         if (i2c->ignore_restart_irq && (i2c->irq_stat & restart_flag)) {
>                 i2c->ignore_restart_irq = false;
>                 i2c->irq_stat = 0;
> -               writew(I2C_RS_MUL_CNFG | I2C_RS_MUL_TRIG | I2C_TRANSAC_START,
> -                      i2c->base + OFFSET_START);
> +               mtk_i2c_writew(i2c, I2C_RS_MUL_CNFG | I2C_RS_MUL_TRIG |
> +                                   I2C_TRANSAC_START, OFFSET_START);
>         } else {
>                 if (i2c->irq_stat & (I2C_TRANSAC_COMP | restart_flag))
>                         complete(&i2c->msg_complete);
> --
> 1.7.9.5
>

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[PATCH 5/6] dt-bindings: i2c: Add Mediatek MT8183 i2c binding

[qii wang]

Add MT8183 i2c binding to binding file. Compare to 2712 i2c
controller, MT8183 has different registers, offsets, clock,
and multi-user function.

Signed-off-by: qii wang <qii.wang@mediatek.com>
---
 Documentation/devicetree/bindings/i2c/i2c-mtk.txt |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/i2c/i2c-mtk.txt b/Documentation/devicetree/bindings/i2c/i2c-mtk.txt
index ee4c324..0d29a5b 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-mtk.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-mtk.txt
@@ -12,14 +12,15 @@ Required properties:
       "mediatek,mt7623-i2c", "mediatek,mt6577-i2c": for MediaTek MT7623
       "mediatek,mt7629-i2c", "mediatek,mt2712-i2c": for MediaTek MT7629
       "mediatek,mt8173-i2c": for MediaTek MT8173
+      "mediatek,mt8183-i2c": for MediaTek MT8183
   - reg: physical base address of the controller and dma base, length of memory
     mapped region.
   - interrupts: interrupt number to the cpu.
   - clock-div: the fixed value for frequency divider of clock source in i2c
     module. Each IC may be different.
   - clocks: clock name from clock manager
-  - clock-names: Must include "main" and "dma", if enable have-pmic need include
-    "pmic" extra.
+  - clock-names: Must include "main" and "dma", "arb" is optional, if enable
+    have-pmic need include "pmic" extra.
 
 Optional properties:
   - clock-frequency: Frequency in Hz of the bus when transfer, the default value
@@ -27,6 +28,7 @@ Optional properties:
   - mediatek,have-pmic: platform can control i2c form special pmic side.
     Only mt6589 and mt8135 support this feature.
   - mediatek,use-push-pull: IO config use push-pull mode.
+  - mediatek,share-i3c: i3c controller can share i2c function.
 
 Example:
 
-- 
1.7.9.5

[PATCH 5/6] dt-bindings: i2c: Add Mediatek MT8183 i2c binding

[qii wang]

Add MT8183 i2c binding to binding file. Compare to 2712 i2c
controller, MT8183 has different registers, offsets, clock,
and multi-user function.

Signed-off-by: qii wang <qii.wang@mediatek.com>
---
 Documentation/devicetree/bindings/i2c/i2c-mtk.txt |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/i2c/i2c-mtk.txt b/Documentation/devicetree/bindings/i2c/i2c-mtk.txt
index ee4c324..0d29a5b 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-mtk.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-mtk.txt
@@ -12,14 +12,15 @@ Required properties:
       "mediatek,mt7623-i2c", "mediatek,mt6577-i2c": for MediaTek MT7623
       "mediatek,mt7629-i2c", "mediatek,mt2712-i2c": for MediaTek MT7629
       "mediatek,mt8173-i2c": for MediaTek MT8173
+      "mediatek,mt8183-i2c": for MediaTek MT8183
   - reg: physical base address of the controller and dma base, length of memory
     mapped region.
   - interrupts: interrupt number to the cpu.
   - clock-div: the fixed value for frequency divider of clock source in i2c
     module. Each IC may be different.
   - clocks: clock name from clock manager
-  - clock-names: Must include "main" and "dma", if enable have-pmic need include
-    "pmic" extra.
+  - clock-names: Must include "main" and "dma", "arb" is optional, if enable
+    have-pmic need include "pmic" extra.
 
 Optional properties:
   - clock-frequency: Frequency in Hz of the bus when transfer, the default value
@@ -27,6 +28,7 @@ Optional properties:
   - mediatek,have-pmic: platform can control i2c form special pmic side.
     Only mt6589 and mt8135 support this feature.
   - mediatek,use-push-pull: IO config use push-pull mode.
+  - mediatek,share-i3c: i3c controller can share i2c function.
 
 Example:
 
-- 
1.7.9.5

[PATCH 5/6] dt-bindings: i2c: Add Mediatek MT8183 i2c binding

[qii wang]

Add MT8183 i2c binding to binding file. Compare to 2712 i2c
controller, MT8183 has different registers, offsets, clock,
and multi-user function.

Signed-off-by: qii wang <qii.wang@mediatek.com>
---
 Documentation/devicetree/bindings/i2c/i2c-mtk.txt |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/i2c/i2c-mtk.txt b/Documentation/devicetree/bindings/i2c/i2c-mtk.txt
index ee4c324..0d29a5b 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-mtk.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-mtk.txt
@@ -12,14 +12,15 @@ Required properties:
       "mediatek,mt7623-i2c", "mediatek,mt6577-i2c": for MediaTek MT7623
       "mediatek,mt7629-i2c", "mediatek,mt2712-i2c": for MediaTek MT7629
       "mediatek,mt8173-i2c": for MediaTek MT8173
+      "mediatek,mt8183-i2c": for MediaTek MT8183
   - reg: physical base address of the controller and dma base, length of memory
     mapped region.
   - interrupts: interrupt number to the cpu.
   - clock-div: the fixed value for frequency divider of clock source in i2c
     module. Each IC may be different.
   - clocks: clock name from clock manager
-  - clock-names: Must include "main" and "dma", if enable have-pmic need include
-    "pmic" extra.
+  - clock-names: Must include "main" and "dma", "arb" is optional, if enable
+    have-pmic need include "pmic" extra.
 
 Optional properties:
   - clock-frequency: Frequency in Hz of the bus when transfer, the default value
@@ -27,6 +28,7 @@ Optional properties:
   - mediatek,have-pmic: platform can control i2c form special pmic side.
     Only mt6589 and mt8135 support this feature.
   - mediatek,use-push-pull: IO config use push-pull mode.
+  - mediatek,share-i3c: i3c controller can share i2c function.
 
 Example:
 
-- 
1.7.9.5


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Re: [PATCH 5/6] dt-bindings: i2c: Add Mediatek MT8183 i2c binding

[Rob Herring]

On Fri, 21 Dec 2018 20:58:30 +0800, qii wang wrote:
> Add MT8183 i2c binding to binding file. Compare to 2712 i2c
> controller, MT8183 has different registers, offsets, clock,
> and multi-user function.
> 
> Signed-off-by: qii wang <qii.wang@mediatek.com>
> ---
>  Documentation/devicetree/bindings/i2c/i2c-mtk.txt |    6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 

Reviewed-by: Rob Herring <robh@kernel.org>

Re: [PATCH 5/6] dt-bindings: i2c: Add Mediatek MT8183 i2c binding

[Rob Herring]

On Fri, 21 Dec 2018 20:58:30 +0800, qii wang wrote:
> Add MT8183 i2c binding to binding file. Compare to 2712 i2c
> controller, MT8183 has different registers, offsets, clock,
> and multi-user function.
> 
> Signed-off-by: qii wang <qii.wang@mediatek.com>
> ---
>  Documentation/devicetree/bindings/i2c/i2c-mtk.txt |    6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 

Reviewed-by: Rob Herring <robh@kernel.org>

Re: [PATCH 5/6] dt-bindings: i2c: Add Mediatek MT8183 i2c binding

[Rob Herring]

On Fri, 21 Dec 2018 20:58:30 +0800, qii wang wrote:
> Add MT8183 i2c binding to binding file. Compare to 2712 i2c
> controller, MT8183 has different registers, offsets, clock,
> and multi-user function.
> 
> Signed-off-by: qii wang <qii.wang@mediatek.com>
> ---
>  Documentation/devicetree/bindings/i2c/i2c-mtk.txt |    6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 

Reviewed-by: Rob Herring <robh@kernel.org>

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[PATCH 6/6] i2c: mediatek: Add i2c support for MediaTek MT8183

[qii wang]

Add i2c compatible for MT8183. Compare to 2712 i2c controller, MT8183 has
different registers, offsets, clock, and multi-user function.

Signed-off-by: qii wang <qii.wang@mediatek.com>
---
 drivers/i2c/busses/i2c-mt65xx.c |  127 ++++++++++++++++++++++++++++++++++++---
 1 file changed, 120 insertions(+), 7 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index 428ac99..19f0770 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -35,17 +35,21 @@
 #include <linux/slab.h>
 
 #define I2C_RS_TRANSFER			(1 << 4)
+#define I2C_ARB_LOST			(1 << 3)
 #define I2C_HS_NACKERR			(1 << 2)
 #define I2C_ACKERR			(1 << 1)
 #define I2C_TRANSAC_COMP		(1 << 0)
 #define I2C_TRANSAC_START		(1 << 0)
 #define I2C_RS_MUL_CNFG			(1 << 15)
 #define I2C_RS_MUL_TRIG			(1 << 14)
+#define I2C_HS_TIME_EN			(1 << 7)
 #define I2C_DCM_DISABLE			0x0000
 #define I2C_IO_CONFIG_OPEN_DRAIN	0x0003
 #define I2C_IO_CONFIG_PUSH_PULL		0x0000
 #define I2C_SOFT_RST			0x0001
 #define I2C_FIFO_ADDR_CLR		0x0001
+#define I2C_FIFO_ADDR_CLRH		0x0002
+#define I2C_HFIFO_DATA			0x8208
 #define I2C_DELAY_LEN			0x0002
 #define I2C_ST_START_CON		0x8001
 #define I2C_FS_START_CON		0x1800
@@ -76,6 +80,8 @@
 #define I2C_CONTROL_DIR_CHANGE          (0x1 << 4)
 #define I2C_CONTROL_ACKERR_DET_EN       (0x1 << 5)
 #define I2C_CONTROL_TRANSFER_LEN_CHANGE (0x1 << 6)
+#define I2C_CONTROL_DMAACK_EN           (0x1 << 8)
+#define I2C_CONTROL_ASYNC_MODE          (0x1 << 9)
 #define I2C_CONTROL_WRAPPER             (0x1 << 0)
 
 #define I2C_DRV_NAME		"i2c-mt65xx"
@@ -130,6 +136,15 @@ enum I2C_REGS_OFFSET {
 	OFFSET_DEBUGCTRL,
 	OFFSET_TRANSFER_LEN_AUX,
 	OFFSET_CLOCK_DIV,
+	/* MT8183 only regs */
+	OFFSET_LTIMING,
+	OFFSET_DATA_TIMING,
+	OFFSET_MCU_INTR,
+	OFFSET_HW_TIMEOUT,
+	OFFSET_HFIFO_DATA,
+	OFFSET_HFIFO_STAT,
+	OFFSET_MULTI_DMA,
+	OFFSET_ROLLBACK,
 };
 
 static const u16 mt_i2c_regs_v1[] = {
@@ -159,6 +174,39 @@ enum I2C_REGS_OFFSET {
 	[OFFSET_CLOCK_DIV] = 0x70,
 };
 
+static const u16 mt_i2c_regs_v2[] = {
+	[OFFSET_DATA_PORT] = 0x0,
+	[OFFSET_SLAVE_ADDR] = 0x4,
+	[OFFSET_INTR_MASK] = 0x8,
+	[OFFSET_INTR_STAT] = 0xc,
+	[OFFSET_CONTROL] = 0x10,
+	[OFFSET_TRANSFER_LEN] = 0x14,
+	[OFFSET_TRANSAC_LEN] = 0x18,
+	[OFFSET_DELAY_LEN] = 0x1c,
+	[OFFSET_TIMING] = 0x20,
+	[OFFSET_START] = 0x24,
+	[OFFSET_EXT_CONF] = 0x28,
+	[OFFSET_LTIMING] = 0x2c,
+	[OFFSET_HS] = 0x30,
+	[OFFSET_IO_CONFIG] = 0x34,
+	[OFFSET_FIFO_ADDR_CLR] = 0x38,
+	[OFFSET_DATA_TIMING] = 0x3c,
+	[OFFSET_MCU_INTR] = 0x40,
+	[OFFSET_TRANSFER_LEN_AUX] = 0x44,
+	[OFFSET_CLOCK_DIV] = 0x48,
+	[OFFSET_HW_TIMEOUT] = 0x4c,
+	[OFFSET_SOFTRESET] = 0x50,
+	[OFFSET_HFIFO_DATA] = 0x70,
+	[OFFSET_DEBUGSTAT] = 0xe0,
+	[OFFSET_DEBUGCTRL] = 0xe8,
+	[OFFSET_FIFO_STAT] = 0xf4,
+	[OFFSET_FIFO_THRESH] = 0xf8,
+	[OFFSET_HFIFO_STAT] = 0xfc,
+	[OFFSET_DCM_EN] = 0xf88,
+	[OFFSET_MULTI_DMA] = 0xf8c,
+	[OFFSET_ROLLBACK] = 0xf98,
+};
+
 struct mtk_i2c_compatible {
 	const struct i2c_adapter_quirks *quirks;
 	const u16 *regs;
@@ -168,6 +216,7 @@ struct mtk_i2c_compatible {
 	unsigned char aux_len_reg: 1;
 	unsigned char support_33bits: 1;
 	unsigned char timing_adjust: 1;
+	unsigned char dma_sync: 1;
 };
 
 struct mtk_i2c {
@@ -181,8 +230,10 @@ struct mtk_i2c {
 	struct clk *clk_main;		/* main clock for i2c bus */
 	struct clk *clk_dma;		/* DMA clock for i2c via DMA */
 	struct clk *clk_pmic;		/* PMIC clock for i2c from PMIC */
+	struct clk *clk_arb;		/* Arbitrator clock for i2c */
 	bool have_pmic;			/* can use i2c pins from PMIC */
 	bool use_push_pull;		/* IO config push-pull mode */
+	bool share_i3c;			/* share i3c IP */
 
 	u16 irq_stat;			/* interrupt status */
 	unsigned int clk_src_div;
@@ -190,6 +241,7 @@ struct mtk_i2c {
 	enum mtk_trans_op op;
 	u16 timing_reg;
 	u16 high_speed_reg;
+	u16 ltiming_reg;
 	unsigned char auto_restart;
 	bool ignore_restart_irq;
 	const struct mtk_i2c_compatible *dev_comp;
@@ -216,6 +268,7 @@ struct mtk_i2c {
 	.aux_len_reg = 1,
 	.support_33bits = 1,
 	.timing_adjust = 1,
+	.dma_sync = 0,
 };
 
 static const struct mtk_i2c_compatible mt6577_compat = {
@@ -227,6 +280,7 @@ struct mtk_i2c {
 	.aux_len_reg = 0,
 	.support_33bits = 0,
 	.timing_adjust = 0,
+	.dma_sync = 0,
 };
 
 static const struct mtk_i2c_compatible mt6589_compat = {
@@ -238,6 +292,7 @@ struct mtk_i2c {
 	.aux_len_reg = 0,
 	.support_33bits = 0,
 	.timing_adjust = 0,
+	.dma_sync = 0,
 };
 
 static const struct mtk_i2c_compatible mt7622_compat = {
@@ -249,6 +304,7 @@ struct mtk_i2c {
 	.aux_len_reg = 1,
 	.support_33bits = 0,
 	.timing_adjust = 0,
+	.dma_sync = 0,
 };
 
 static const struct mtk_i2c_compatible mt8173_compat = {
@@ -259,6 +315,18 @@ struct mtk_i2c {
 	.aux_len_reg = 1,
 	.support_33bits = 1,
 	.timing_adjust = 0,
+	.dma_sync = 0,
+};
+
+static const struct mtk_i2c_compatible mt8183_compat = {
+	.regs = mt_i2c_regs_v2,
+	.pmic_i2c = 0,
+	.dcm = 0,
+	.auto_restart = 1,
+	.aux_len_reg = 1,
+	.support_33bits = 1,
+	.timing_adjust = 1,
+	.dma_sync = 1,
 };
 
 static const struct of_device_id mtk_i2c_of_match[] = {
@@ -267,6 +335,7 @@ struct mtk_i2c {
 	{ .compatible = "mediatek,mt6589-i2c", .data = &mt6589_compat },
 	{ .compatible = "mediatek,mt7622-i2c", .data = &mt7622_compat },
 	{ .compatible = "mediatek,mt8173-i2c", .data = &mt8173_compat },
+	{ .compatible = "mediatek,mt8183-i2c", .data = &mt8183_compat },
 	{}
 };
 MODULE_DEVICE_TABLE(of, mtk_i2c_of_match);
@@ -299,8 +368,18 @@ static int mtk_i2c_clock_enable(struct mtk_i2c *i2c)
 		if (ret)
 			goto err_pmic;
 	}
+
+	if (i2c->clk_arb) {
+		ret = clk_prepare_enable(i2c->clk_arb);
+		if (ret)
+			goto err_arb;
+	}
+
 	return 0;
 
+err_arb:
+	if (i2c->have_pmic)
+		clk_disable_unprepare(i2c->clk_pmic);
 err_pmic:
 	clk_disable_unprepare(i2c->clk_main);
 err_main:
@@ -311,6 +390,9 @@ static int mtk_i2c_clock_enable(struct mtk_i2c *i2c)
 
 static void mtk_i2c_clock_disable(struct mtk_i2c *i2c)
 {
+	if (i2c->clk_arb)
+		clk_disable_unprepare(i2c->clk_arb);
+
 	if (i2c->have_pmic)
 		clk_disable_unprepare(i2c->clk_pmic);
 
@@ -333,11 +415,19 @@ static void mtk_i2c_init_hw(struct mtk_i2c *i2c)
 	if (i2c->dev_comp->dcm)
 		mtk_i2c_writew(i2c, I2C_DCM_DISABLE, OFFSET_DCM_EN);
 
-	if (i2c->dev_comp->timing_adjust)
+	if (i2c->dev_comp->timing_adjust && i2c->share_i3c) {
+		mtk_i2c_writew(i2c, (I2C_DEFAULT_CLK_DIV - 1) |
+				    (I2C_DEFAULT_CLK_DIV - 1) << 8,
+				    OFFSET_CLOCK_DIV);
+		i2c->high_speed_reg |= I2C_HS_TIME_EN;
+	} else {
 		mtk_i2c_writew(i2c, I2C_DEFAULT_CLK_DIV - 1, OFFSET_CLOCK_DIV);
+	}
 
 	mtk_i2c_writew(i2c, i2c->timing_reg, OFFSET_TIMING);
 	mtk_i2c_writew(i2c, i2c->high_speed_reg, OFFSET_HS);
+	if (i2c->dev_comp->regs == mt_i2c_regs_v2)
+		mtk_i2c_writew(i2c, i2c->ltiming_reg, OFFSET_LTIMING);
 
 	/* If use i2c pin from PMIC mt6397 side, need set PATH_DIR first */
 	if (i2c->have_pmic)
@@ -345,6 +435,9 @@ static void mtk_i2c_init_hw(struct mtk_i2c *i2c)
 
 	control_reg = I2C_CONTROL_ACKERR_DET_EN |
 		      I2C_CONTROL_CLK_EXT_EN | I2C_CONTROL_DMA_EN;
+	if (i2c->dev_comp->dma_sync)
+		control_reg |= I2C_CONTROL_DMAACK_EN | I2C_CONTROL_ASYNC_MODE;
+
 	mtk_i2c_writew(i2c, control_reg, OFFSET_CONTROL);
 	mtk_i2c_writew(i2c, I2C_DELAY_LEN, OFFSET_DELAY_LEN);
 
@@ -434,6 +527,8 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
 	unsigned int clk_src;
 	unsigned int step_cnt;
 	unsigned int sample_cnt;
+	unsigned int l_step_cnt;
+	unsigned int l_sample_cnt;
 	unsigned int target_speed;
 	int ret;
 
@@ -443,11 +538,11 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
 	if (target_speed > MAX_FS_MODE_SPEED) {
 		/* Set master code speed register */
 		ret = mtk_i2c_calculate_speed(i2c, clk_src, MAX_FS_MODE_SPEED,
-					      &step_cnt, &sample_cnt);
+					      &l_step_cnt, &l_sample_cnt);
 		if (ret < 0)
 			return ret;
 
-		i2c->timing_reg = (sample_cnt << 8) | step_cnt;
+		i2c->timing_reg = (l_sample_cnt << 8) | l_step_cnt;
 
 		/* Set the high speed mode register */
 		ret = mtk_i2c_calculate_speed(i2c, clk_src, target_speed,
@@ -457,6 +552,8 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
 
 		i2c->high_speed_reg = I2C_TIME_DEFAULT_VALUE |
 			(sample_cnt << 12) | (step_cnt << 8);
+		i2c->ltiming_reg = (l_sample_cnt << 6) | l_step_cnt |
+				   (sample_cnt << 12) | (step_cnt << 9);
 	} else {
 		ret = mtk_i2c_calculate_speed(i2c, clk_src, target_speed,
 					      &step_cnt, &sample_cnt);
@@ -467,6 +564,8 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
 
 		/* Disable the high speed transaction */
 		i2c->high_speed_reg = I2C_TIME_CLR_VALUE;
+
+		i2c->ltiming_reg = (sample_cnt << 6) | step_cnt;
 	}
 
 	return 0;
@@ -483,6 +582,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 	u16 addr_reg;
 	u16 start_reg;
 	u16 control_reg;
+	u16 fifo_clr_reg = I2C_FIFO_ADDR_CLR;
 	u16 restart_flag = 0;
 	u32 reg_4g_mode;
 	u8 *dma_rd_buf = NULL;
@@ -519,13 +619,21 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 
 	/* Clear interrupt status */
 	mtk_i2c_writew(i2c, restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
-	       I2C_TRANSAC_COMP, OFFSET_INTR_STAT);
+			    I2C_ARB_LOST | I2C_TRANSAC_COMP,
+			    OFFSET_INTR_STAT);
+
+	if (i2c->share_i3c)
+		fifo_clr_reg |= I2C_FIFO_ADDR_CLRH;
 
-	mtk_i2c_writew(i2c, I2C_FIFO_ADDR_CLR, OFFSET_FIFO_ADDR_CLR);
+	mtk_i2c_writew(i2c, fifo_clr_reg, OFFSET_FIFO_ADDR_CLR);
+
+	if ((i2c->speed_hz > MAX_FS_MODE_SPEED) && i2c->share_i3c)
+		mtk_i2c_writew(i2c, I2C_HFIFO_DATA, OFFSET_HFIFO_DATA);
 
 	/* Enable interrupt */
 	mtk_i2c_writew(i2c, restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
-	       I2C_TRANSAC_COMP, OFFSET_INTR_MASK);
+			    I2C_ARB_LOST | I2C_TRANSAC_COMP,
+			    OFFSET_INTR_MASK);
 
 	/* Set transfer and transaction len */
 	if (i2c->op == I2C_MASTER_WRRD) {
@@ -659,7 +767,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 
 	/* Clear interrupt mask */
 	mtk_i2c_writew(i2c, ~(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
-	       I2C_TRANSAC_COMP), OFFSET_INTR_MASK);
+			    I2C_ARB_LOST | I2C_TRANSAC_COMP), OFFSET_INTR_MASK);
 
 	if (i2c->op == I2C_MASTER_WR) {
 		dma_unmap_single(i2c->dev, wpaddr,
@@ -817,6 +925,7 @@ static int mtk_i2c_parse_dt(struct device_node *np, struct mtk_i2c *i2c)
 	if (i2c->clk_src_div == 0)
 		return -EINVAL;
 
+	i2c->share_i3c = of_property_read_bool(np, "mediatek,share-i3c");
 	i2c->have_pmic = of_property_read_bool(np, "mediatek,have-pmic");
 	i2c->use_push_pull =
 		of_property_read_bool(np, "mediatek,use-push-pull");
@@ -884,6 +993,10 @@ static int mtk_i2c_probe(struct platform_device *pdev)
 		return PTR_ERR(i2c->clk_dma);
 	}
 
+	i2c->clk_arb = devm_clk_get(&pdev->dev, "arb");
+	if (IS_ERR(i2c->clk_arb))
+		i2c->clk_arb = NULL;
+
 	clk = i2c->clk_main;
 	if (i2c->have_pmic) {
 		i2c->clk_pmic = devm_clk_get(&pdev->dev, "pmic");
-- 
1.7.9.5

[PATCH 6/6] i2c: mediatek: Add i2c support for MediaTek MT8183

[qii wang]

Add i2c compatible for MT8183. Compare to 2712 i2c controller, MT8183 has
different registers, offsets, clock, and multi-user function.

Signed-off-by: qii wang <qii.wang@mediatek.com>
---
 drivers/i2c/busses/i2c-mt65xx.c |  127 ++++++++++++++++++++++++++++++++++++---
 1 file changed, 120 insertions(+), 7 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index 428ac99..19f0770 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -35,17 +35,21 @@
 #include <linux/slab.h>
 
 #define I2C_RS_TRANSFER			(1 << 4)
+#define I2C_ARB_LOST			(1 << 3)
 #define I2C_HS_NACKERR			(1 << 2)
 #define I2C_ACKERR			(1 << 1)
 #define I2C_TRANSAC_COMP		(1 << 0)
 #define I2C_TRANSAC_START		(1 << 0)
 #define I2C_RS_MUL_CNFG			(1 << 15)
 #define I2C_RS_MUL_TRIG			(1 << 14)
+#define I2C_HS_TIME_EN			(1 << 7)
 #define I2C_DCM_DISABLE			0x0000
 #define I2C_IO_CONFIG_OPEN_DRAIN	0x0003
 #define I2C_IO_CONFIG_PUSH_PULL		0x0000
 #define I2C_SOFT_RST			0x0001
 #define I2C_FIFO_ADDR_CLR		0x0001
+#define I2C_FIFO_ADDR_CLRH		0x0002
+#define I2C_HFIFO_DATA			0x8208
 #define I2C_DELAY_LEN			0x0002
 #define I2C_ST_START_CON		0x8001
 #define I2C_FS_START_CON		0x1800
@@ -76,6 +80,8 @@
 #define I2C_CONTROL_DIR_CHANGE          (0x1 << 4)
 #define I2C_CONTROL_ACKERR_DET_EN       (0x1 << 5)
 #define I2C_CONTROL_TRANSFER_LEN_CHANGE (0x1 << 6)
+#define I2C_CONTROL_DMAACK_EN           (0x1 << 8)
+#define I2C_CONTROL_ASYNC_MODE          (0x1 << 9)
 #define I2C_CONTROL_WRAPPER             (0x1 << 0)
 
 #define I2C_DRV_NAME		"i2c-mt65xx"
@@ -130,6 +136,15 @@ enum I2C_REGS_OFFSET {
 	OFFSET_DEBUGCTRL,
 	OFFSET_TRANSFER_LEN_AUX,
 	OFFSET_CLOCK_DIV,
+	/* MT8183 only regs */
+	OFFSET_LTIMING,
+	OFFSET_DATA_TIMING,
+	OFFSET_MCU_INTR,
+	OFFSET_HW_TIMEOUT,
+	OFFSET_HFIFO_DATA,
+	OFFSET_HFIFO_STAT,
+	OFFSET_MULTI_DMA,
+	OFFSET_ROLLBACK,
 };
 
 static const u16 mt_i2c_regs_v1[] = {
@@ -159,6 +174,39 @@ enum I2C_REGS_OFFSET {
 	[OFFSET_CLOCK_DIV] = 0x70,
 };
 
+static const u16 mt_i2c_regs_v2[] = {
+	[OFFSET_DATA_PORT] = 0x0,
+	[OFFSET_SLAVE_ADDR] = 0x4,
+	[OFFSET_INTR_MASK] = 0x8,
+	[OFFSET_INTR_STAT] = 0xc,
+	[OFFSET_CONTROL] = 0x10,
+	[OFFSET_TRANSFER_LEN] = 0x14,
+	[OFFSET_TRANSAC_LEN] = 0x18,
+	[OFFSET_DELAY_LEN] = 0x1c,
+	[OFFSET_TIMING] = 0x20,
+	[OFFSET_START] = 0x24,
+	[OFFSET_EXT_CONF] = 0x28,
+	[OFFSET_LTIMING] = 0x2c,
+	[OFFSET_HS] = 0x30,
+	[OFFSET_IO_CONFIG] = 0x34,
+	[OFFSET_FIFO_ADDR_CLR] = 0x38,
+	[OFFSET_DATA_TIMING] = 0x3c,
+	[OFFSET_MCU_INTR] = 0x40,
+	[OFFSET_TRANSFER_LEN_AUX] = 0x44,
+	[OFFSET_CLOCK_DIV] = 0x48,
+	[OFFSET_HW_TIMEOUT] = 0x4c,
+	[OFFSET_SOFTRESET] = 0x50,
+	[OFFSET_HFIFO_DATA] = 0x70,
+	[OFFSET_DEBUGSTAT] = 0xe0,
+	[OFFSET_DEBUGCTRL] = 0xe8,
+	[OFFSET_FIFO_STAT] = 0xf4,
+	[OFFSET_FIFO_THRESH] = 0xf8,
+	[OFFSET_HFIFO_STAT] = 0xfc,
+	[OFFSET_DCM_EN] = 0xf88,
+	[OFFSET_MULTI_DMA] = 0xf8c,
+	[OFFSET_ROLLBACK] = 0xf98,
+};
+
 struct mtk_i2c_compatible {
 	const struct i2c_adapter_quirks *quirks;
 	const u16 *regs;
@@ -168,6 +216,7 @@ struct mtk_i2c_compatible {
 	unsigned char aux_len_reg: 1;
 	unsigned char support_33bits: 1;
 	unsigned char timing_adjust: 1;
+	unsigned char dma_sync: 1;
 };
 
 struct mtk_i2c {
@@ -181,8 +230,10 @@ struct mtk_i2c {
 	struct clk *clk_main;		/* main clock for i2c bus */
 	struct clk *clk_dma;		/* DMA clock for i2c via DMA */
 	struct clk *clk_pmic;		/* PMIC clock for i2c from PMIC */
+	struct clk *clk_arb;		/* Arbitrator clock for i2c */
 	bool have_pmic;			/* can use i2c pins from PMIC */
 	bool use_push_pull;		/* IO config push-pull mode */
+	bool share_i3c;			/* share i3c IP */
 
 	u16 irq_stat;			/* interrupt status */
 	unsigned int clk_src_div;
@@ -190,6 +241,7 @@ struct mtk_i2c {
 	enum mtk_trans_op op;
 	u16 timing_reg;
 	u16 high_speed_reg;
+	u16 ltiming_reg;
 	unsigned char auto_restart;
 	bool ignore_restart_irq;
 	const struct mtk_i2c_compatible *dev_comp;
@@ -216,6 +268,7 @@ struct mtk_i2c {
 	.aux_len_reg = 1,
 	.support_33bits = 1,
 	.timing_adjust = 1,
+	.dma_sync = 0,
 };
 
 static const struct mtk_i2c_compatible mt6577_compat = {
@@ -227,6 +280,7 @@ struct mtk_i2c {
 	.aux_len_reg = 0,
 	.support_33bits = 0,
 	.timing_adjust = 0,
+	.dma_sync = 0,
 };
 
 static const struct mtk_i2c_compatible mt6589_compat = {
@@ -238,6 +292,7 @@ struct mtk_i2c {
 	.aux_len_reg = 0,
 	.support_33bits = 0,
 	.timing_adjust = 0,
+	.dma_sync = 0,
 };
 
 static const struct mtk_i2c_compatible mt7622_compat = {
@@ -249,6 +304,7 @@ struct mtk_i2c {
 	.aux_len_reg = 1,
 	.support_33bits = 0,
 	.timing_adjust = 0,
+	.dma_sync = 0,
 };
 
 static const struct mtk_i2c_compatible mt8173_compat = {
@@ -259,6 +315,18 @@ struct mtk_i2c {
 	.aux_len_reg = 1,
 	.support_33bits = 1,
 	.timing_adjust = 0,
+	.dma_sync = 0,
+};
+
+static const struct mtk_i2c_compatible mt8183_compat = {
+	.regs = mt_i2c_regs_v2,
+	.pmic_i2c = 0,
+	.dcm = 0,
+	.auto_restart = 1,
+	.aux_len_reg = 1,
+	.support_33bits = 1,
+	.timing_adjust = 1,
+	.dma_sync = 1,
 };
 
 static const struct of_device_id mtk_i2c_of_match[] = {
@@ -267,6 +335,7 @@ struct mtk_i2c {
 	{ .compatible = "mediatek,mt6589-i2c", .data = &mt6589_compat },
 	{ .compatible = "mediatek,mt7622-i2c", .data = &mt7622_compat },
 	{ .compatible = "mediatek,mt8173-i2c", .data = &mt8173_compat },
+	{ .compatible = "mediatek,mt8183-i2c", .data = &mt8183_compat },
 	{}
 };
 MODULE_DEVICE_TABLE(of, mtk_i2c_of_match);
@@ -299,8 +368,18 @@ static int mtk_i2c_clock_enable(struct mtk_i2c *i2c)
 		if (ret)
 			goto err_pmic;
 	}
+
+	if (i2c->clk_arb) {
+		ret = clk_prepare_enable(i2c->clk_arb);
+		if (ret)
+			goto err_arb;
+	}
+
 	return 0;
 
+err_arb:
+	if (i2c->have_pmic)
+		clk_disable_unprepare(i2c->clk_pmic);
 err_pmic:
 	clk_disable_unprepare(i2c->clk_main);
 err_main:
@@ -311,6 +390,9 @@ static int mtk_i2c_clock_enable(struct mtk_i2c *i2c)
 
 static void mtk_i2c_clock_disable(struct mtk_i2c *i2c)
 {
+	if (i2c->clk_arb)
+		clk_disable_unprepare(i2c->clk_arb);
+
 	if (i2c->have_pmic)
 		clk_disable_unprepare(i2c->clk_pmic);
 
@@ -333,11 +415,19 @@ static void mtk_i2c_init_hw(struct mtk_i2c *i2c)
 	if (i2c->dev_comp->dcm)
 		mtk_i2c_writew(i2c, I2C_DCM_DISABLE, OFFSET_DCM_EN);
 
-	if (i2c->dev_comp->timing_adjust)
+	if (i2c->dev_comp->timing_adjust && i2c->share_i3c) {
+		mtk_i2c_writew(i2c, (I2C_DEFAULT_CLK_DIV - 1) |
+				    (I2C_DEFAULT_CLK_DIV - 1) << 8,
+				    OFFSET_CLOCK_DIV);
+		i2c->high_speed_reg |= I2C_HS_TIME_EN;
+	} else {
 		mtk_i2c_writew(i2c, I2C_DEFAULT_CLK_DIV - 1, OFFSET_CLOCK_DIV);
+	}
 
 	mtk_i2c_writew(i2c, i2c->timing_reg, OFFSET_TIMING);
 	mtk_i2c_writew(i2c, i2c->high_speed_reg, OFFSET_HS);
+	if (i2c->dev_comp->regs == mt_i2c_regs_v2)
+		mtk_i2c_writew(i2c, i2c->ltiming_reg, OFFSET_LTIMING);
 
 	/* If use i2c pin from PMIC mt6397 side, need set PATH_DIR first */
 	if (i2c->have_pmic)
@@ -345,6 +435,9 @@ static void mtk_i2c_init_hw(struct mtk_i2c *i2c)
 
 	control_reg = I2C_CONTROL_ACKERR_DET_EN |
 		      I2C_CONTROL_CLK_EXT_EN | I2C_CONTROL_DMA_EN;
+	if (i2c->dev_comp->dma_sync)
+		control_reg |= I2C_CONTROL_DMAACK_EN | I2C_CONTROL_ASYNC_MODE;
+
 	mtk_i2c_writew(i2c, control_reg, OFFSET_CONTROL);
 	mtk_i2c_writew(i2c, I2C_DELAY_LEN, OFFSET_DELAY_LEN);
 
@@ -434,6 +527,8 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
 	unsigned int clk_src;
 	unsigned int step_cnt;
 	unsigned int sample_cnt;
+	unsigned int l_step_cnt;
+	unsigned int l_sample_cnt;
 	unsigned int target_speed;
 	int ret;
 
@@ -443,11 +538,11 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
 	if (target_speed > MAX_FS_MODE_SPEED) {
 		/* Set master code speed register */
 		ret = mtk_i2c_calculate_speed(i2c, clk_src, MAX_FS_MODE_SPEED,
-					      &step_cnt, &sample_cnt);
+					      &l_step_cnt, &l_sample_cnt);
 		if (ret < 0)
 			return ret;
 
-		i2c->timing_reg = (sample_cnt << 8) | step_cnt;
+		i2c->timing_reg = (l_sample_cnt << 8) | l_step_cnt;
 
 		/* Set the high speed mode register */
 		ret = mtk_i2c_calculate_speed(i2c, clk_src, target_speed,
@@ -457,6 +552,8 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
 
 		i2c->high_speed_reg = I2C_TIME_DEFAULT_VALUE |
 			(sample_cnt << 12) | (step_cnt << 8);
+		i2c->ltiming_reg = (l_sample_cnt << 6) | l_step_cnt |
+				   (sample_cnt << 12) | (step_cnt << 9);
 	} else {
 		ret = mtk_i2c_calculate_speed(i2c, clk_src, target_speed,
 					      &step_cnt, &sample_cnt);
@@ -467,6 +564,8 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
 
 		/* Disable the high speed transaction */
 		i2c->high_speed_reg = I2C_TIME_CLR_VALUE;
+
+		i2c->ltiming_reg = (sample_cnt << 6) | step_cnt;
 	}
 
 	return 0;
@@ -483,6 +582,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 	u16 addr_reg;
 	u16 start_reg;
 	u16 control_reg;
+	u16 fifo_clr_reg = I2C_FIFO_ADDR_CLR;
 	u16 restart_flag = 0;
 	u32 reg_4g_mode;
 	u8 *dma_rd_buf = NULL;
@@ -519,13 +619,21 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 
 	/* Clear interrupt status */
 	mtk_i2c_writew(i2c, restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
-	       I2C_TRANSAC_COMP, OFFSET_INTR_STAT);
+			    I2C_ARB_LOST | I2C_TRANSAC_COMP,
+			    OFFSET_INTR_STAT);
+
+	if (i2c->share_i3c)
+		fifo_clr_reg |= I2C_FIFO_ADDR_CLRH;
 
-	mtk_i2c_writew(i2c, I2C_FIFO_ADDR_CLR, OFFSET_FIFO_ADDR_CLR);
+	mtk_i2c_writew(i2c, fifo_clr_reg, OFFSET_FIFO_ADDR_CLR);
+
+	if ((i2c->speed_hz > MAX_FS_MODE_SPEED) && i2c->share_i3c)
+		mtk_i2c_writew(i2c, I2C_HFIFO_DATA, OFFSET_HFIFO_DATA);
 
 	/* Enable interrupt */
 	mtk_i2c_writew(i2c, restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
-	       I2C_TRANSAC_COMP, OFFSET_INTR_MASK);
+			    I2C_ARB_LOST | I2C_TRANSAC_COMP,
+			    OFFSET_INTR_MASK);
 
 	/* Set transfer and transaction len */
 	if (i2c->op == I2C_MASTER_WRRD) {
@@ -659,7 +767,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 
 	/* Clear interrupt mask */
 	mtk_i2c_writew(i2c, ~(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
-	       I2C_TRANSAC_COMP), OFFSET_INTR_MASK);
+			    I2C_ARB_LOST | I2C_TRANSAC_COMP), OFFSET_INTR_MASK);
 
 	if (i2c->op == I2C_MASTER_WR) {
 		dma_unmap_single(i2c->dev, wpaddr,
@@ -817,6 +925,7 @@ static int mtk_i2c_parse_dt(struct device_node *np, struct mtk_i2c *i2c)
 	if (i2c->clk_src_div == 0)
 		return -EINVAL;
 
+	i2c->share_i3c = of_property_read_bool(np, "mediatek,share-i3c");
 	i2c->have_pmic = of_property_read_bool(np, "mediatek,have-pmic");
 	i2c->use_push_pull =
 		of_property_read_bool(np, "mediatek,use-push-pull");
@@ -884,6 +993,10 @@ static int mtk_i2c_probe(struct platform_device *pdev)
 		return PTR_ERR(i2c->clk_dma);
 	}
 
+	i2c->clk_arb = devm_clk_get(&pdev->dev, "arb");
+	if (IS_ERR(i2c->clk_arb))
+		i2c->clk_arb = NULL;
+
 	clk = i2c->clk_main;
 	if (i2c->have_pmic) {
 		i2c->clk_pmic = devm_clk_get(&pdev->dev, "pmic");
-- 
1.7.9.5

[PATCH 6/6] i2c: mediatek: Add i2c support for MediaTek MT8183

[qii wang]

Add i2c compatible for MT8183. Compare to 2712 i2c controller, MT8183 has
different registers, offsets, clock, and multi-user function.

Signed-off-by: qii wang <qii.wang@mediatek.com>
---
 drivers/i2c/busses/i2c-mt65xx.c |  127 ++++++++++++++++++++++++++++++++++++---
 1 file changed, 120 insertions(+), 7 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index 428ac99..19f0770 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -35,17 +35,21 @@
 #include <linux/slab.h>
 
 #define I2C_RS_TRANSFER			(1 << 4)
+#define I2C_ARB_LOST			(1 << 3)
 #define I2C_HS_NACKERR			(1 << 2)
 #define I2C_ACKERR			(1 << 1)
 #define I2C_TRANSAC_COMP		(1 << 0)
 #define I2C_TRANSAC_START		(1 << 0)
 #define I2C_RS_MUL_CNFG			(1 << 15)
 #define I2C_RS_MUL_TRIG			(1 << 14)
+#define I2C_HS_TIME_EN			(1 << 7)
 #define I2C_DCM_DISABLE			0x0000
 #define I2C_IO_CONFIG_OPEN_DRAIN	0x0003
 #define I2C_IO_CONFIG_PUSH_PULL		0x0000
 #define I2C_SOFT_RST			0x0001
 #define I2C_FIFO_ADDR_CLR		0x0001
+#define I2C_FIFO_ADDR_CLRH		0x0002
+#define I2C_HFIFO_DATA			0x8208
 #define I2C_DELAY_LEN			0x0002
 #define I2C_ST_START_CON		0x8001
 #define I2C_FS_START_CON		0x1800
@@ -76,6 +80,8 @@
 #define I2C_CONTROL_DIR_CHANGE          (0x1 << 4)
 #define I2C_CONTROL_ACKERR_DET_EN       (0x1 << 5)
 #define I2C_CONTROL_TRANSFER_LEN_CHANGE (0x1 << 6)
+#define I2C_CONTROL_DMAACK_EN           (0x1 << 8)
+#define I2C_CONTROL_ASYNC_MODE          (0x1 << 9)
 #define I2C_CONTROL_WRAPPER             (0x1 << 0)
 
 #define I2C_DRV_NAME		"i2c-mt65xx"
@@ -130,6 +136,15 @@ enum I2C_REGS_OFFSET {
 	OFFSET_DEBUGCTRL,
 	OFFSET_TRANSFER_LEN_AUX,
 	OFFSET_CLOCK_DIV,
+	/* MT8183 only regs */
+	OFFSET_LTIMING,
+	OFFSET_DATA_TIMING,
+	OFFSET_MCU_INTR,
+	OFFSET_HW_TIMEOUT,
+	OFFSET_HFIFO_DATA,
+	OFFSET_HFIFO_STAT,
+	OFFSET_MULTI_DMA,
+	OFFSET_ROLLBACK,
 };
 
 static const u16 mt_i2c_regs_v1[] = {
@@ -159,6 +174,39 @@ enum I2C_REGS_OFFSET {
 	[OFFSET_CLOCK_DIV] = 0x70,
 };
 
+static const u16 mt_i2c_regs_v2[] = {
+	[OFFSET_DATA_PORT] = 0x0,
+	[OFFSET_SLAVE_ADDR] = 0x4,
+	[OFFSET_INTR_MASK] = 0x8,
+	[OFFSET_INTR_STAT] = 0xc,
+	[OFFSET_CONTROL] = 0x10,
+	[OFFSET_TRANSFER_LEN] = 0x14,
+	[OFFSET_TRANSAC_LEN] = 0x18,
+	[OFFSET_DELAY_LEN] = 0x1c,
+	[OFFSET_TIMING] = 0x20,
+	[OFFSET_START] = 0x24,
+	[OFFSET_EXT_CONF] = 0x28,
+	[OFFSET_LTIMING] = 0x2c,
+	[OFFSET_HS] = 0x30,
+	[OFFSET_IO_CONFIG] = 0x34,
+	[OFFSET_FIFO_ADDR_CLR] = 0x38,
+	[OFFSET_DATA_TIMING] = 0x3c,
+	[OFFSET_MCU_INTR] = 0x40,
+	[OFFSET_TRANSFER_LEN_AUX] = 0x44,
+	[OFFSET_CLOCK_DIV] = 0x48,
+	[OFFSET_HW_TIMEOUT] = 0x4c,
+	[OFFSET_SOFTRESET] = 0x50,
+	[OFFSET_HFIFO_DATA] = 0x70,
+	[OFFSET_DEBUGSTAT] = 0xe0,
+	[OFFSET_DEBUGCTRL] = 0xe8,
+	[OFFSET_FIFO_STAT] = 0xf4,
+	[OFFSET_FIFO_THRESH] = 0xf8,
+	[OFFSET_HFIFO_STAT] = 0xfc,
+	[OFFSET_DCM_EN] = 0xf88,
+	[OFFSET_MULTI_DMA] = 0xf8c,
+	[OFFSET_ROLLBACK] = 0xf98,
+};
+
 struct mtk_i2c_compatible {
 	const struct i2c_adapter_quirks *quirks;
 	const u16 *regs;
@@ -168,6 +216,7 @@ struct mtk_i2c_compatible {
 	unsigned char aux_len_reg: 1;
 	unsigned char support_33bits: 1;
 	unsigned char timing_adjust: 1;
+	unsigned char dma_sync: 1;
 };
 
 struct mtk_i2c {
@@ -181,8 +230,10 @@ struct mtk_i2c {
 	struct clk *clk_main;		/* main clock for i2c bus */
 	struct clk *clk_dma;		/* DMA clock for i2c via DMA */
 	struct clk *clk_pmic;		/* PMIC clock for i2c from PMIC */
+	struct clk *clk_arb;		/* Arbitrator clock for i2c */
 	bool have_pmic;			/* can use i2c pins from PMIC */
 	bool use_push_pull;		/* IO config push-pull mode */
+	bool share_i3c;			/* share i3c IP */
 
 	u16 irq_stat;			/* interrupt status */
 	unsigned int clk_src_div;
@@ -190,6 +241,7 @@ struct mtk_i2c {
 	enum mtk_trans_op op;
 	u16 timing_reg;
 	u16 high_speed_reg;
+	u16 ltiming_reg;
 	unsigned char auto_restart;
 	bool ignore_restart_irq;
 	const struct mtk_i2c_compatible *dev_comp;
@@ -216,6 +268,7 @@ struct mtk_i2c {
 	.aux_len_reg = 1,
 	.support_33bits = 1,
 	.timing_adjust = 1,
+	.dma_sync = 0,
 };
 
 static const struct mtk_i2c_compatible mt6577_compat = {
@@ -227,6 +280,7 @@ struct mtk_i2c {
 	.aux_len_reg = 0,
 	.support_33bits = 0,
 	.timing_adjust = 0,
+	.dma_sync = 0,
 };
 
 static const struct mtk_i2c_compatible mt6589_compat = {
@@ -238,6 +292,7 @@ struct mtk_i2c {
 	.aux_len_reg = 0,
 	.support_33bits = 0,
 	.timing_adjust = 0,
+	.dma_sync = 0,
 };
 
 static const struct mtk_i2c_compatible mt7622_compat = {
@@ -249,6 +304,7 @@ struct mtk_i2c {
 	.aux_len_reg = 1,
 	.support_33bits = 0,
 	.timing_adjust = 0,
+	.dma_sync = 0,
 };
 
 static const struct mtk_i2c_compatible mt8173_compat = {
@@ -259,6 +315,18 @@ struct mtk_i2c {
 	.aux_len_reg = 1,
 	.support_33bits = 1,
 	.timing_adjust = 0,
+	.dma_sync = 0,
+};
+
+static const struct mtk_i2c_compatible mt8183_compat = {
+	.regs = mt_i2c_regs_v2,
+	.pmic_i2c = 0,
+	.dcm = 0,
+	.auto_restart = 1,
+	.aux_len_reg = 1,
+	.support_33bits = 1,
+	.timing_adjust = 1,
+	.dma_sync = 1,
 };
 
 static const struct of_device_id mtk_i2c_of_match[] = {
@@ -267,6 +335,7 @@ struct mtk_i2c {
 	{ .compatible = "mediatek,mt6589-i2c", .data = &mt6589_compat },
 	{ .compatible = "mediatek,mt7622-i2c", .data = &mt7622_compat },
 	{ .compatible = "mediatek,mt8173-i2c", .data = &mt8173_compat },
+	{ .compatible = "mediatek,mt8183-i2c", .data = &mt8183_compat },
 	{}
 };
 MODULE_DEVICE_TABLE(of, mtk_i2c_of_match);
@@ -299,8 +368,18 @@ static int mtk_i2c_clock_enable(struct mtk_i2c *i2c)
 		if (ret)
 			goto err_pmic;
 	}
+
+	if (i2c->clk_arb) {
+		ret = clk_prepare_enable(i2c->clk_arb);
+		if (ret)
+			goto err_arb;
+	}
+
 	return 0;
 
+err_arb:
+	if (i2c->have_pmic)
+		clk_disable_unprepare(i2c->clk_pmic);
 err_pmic:
 	clk_disable_unprepare(i2c->clk_main);
 err_main:
@@ -311,6 +390,9 @@ static int mtk_i2c_clock_enable(struct mtk_i2c *i2c)
 
 static void mtk_i2c_clock_disable(struct mtk_i2c *i2c)
 {
+	if (i2c->clk_arb)
+		clk_disable_unprepare(i2c->clk_arb);
+
 	if (i2c->have_pmic)
 		clk_disable_unprepare(i2c->clk_pmic);
 
@@ -333,11 +415,19 @@ static void mtk_i2c_init_hw(struct mtk_i2c *i2c)
 	if (i2c->dev_comp->dcm)
 		mtk_i2c_writew(i2c, I2C_DCM_DISABLE, OFFSET_DCM_EN);
 
-	if (i2c->dev_comp->timing_adjust)
+	if (i2c->dev_comp->timing_adjust && i2c->share_i3c) {
+		mtk_i2c_writew(i2c, (I2C_DEFAULT_CLK_DIV - 1) |
+				    (I2C_DEFAULT_CLK_DIV - 1) << 8,
+				    OFFSET_CLOCK_DIV);
+		i2c->high_speed_reg |= I2C_HS_TIME_EN;
+	} else {
 		mtk_i2c_writew(i2c, I2C_DEFAULT_CLK_DIV - 1, OFFSET_CLOCK_DIV);
+	}
 
 	mtk_i2c_writew(i2c, i2c->timing_reg, OFFSET_TIMING);
 	mtk_i2c_writew(i2c, i2c->high_speed_reg, OFFSET_HS);
+	if (i2c->dev_comp->regs == mt_i2c_regs_v2)
+		mtk_i2c_writew(i2c, i2c->ltiming_reg, OFFSET_LTIMING);
 
 	/* If use i2c pin from PMIC mt6397 side, need set PATH_DIR first */
 	if (i2c->have_pmic)
@@ -345,6 +435,9 @@ static void mtk_i2c_init_hw(struct mtk_i2c *i2c)
 
 	control_reg = I2C_CONTROL_ACKERR_DET_EN |
 		      I2C_CONTROL_CLK_EXT_EN | I2C_CONTROL_DMA_EN;
+	if (i2c->dev_comp->dma_sync)
+		control_reg |= I2C_CONTROL_DMAACK_EN | I2C_CONTROL_ASYNC_MODE;
+
 	mtk_i2c_writew(i2c, control_reg, OFFSET_CONTROL);
 	mtk_i2c_writew(i2c, I2C_DELAY_LEN, OFFSET_DELAY_LEN);
 
@@ -434,6 +527,8 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
 	unsigned int clk_src;
 	unsigned int step_cnt;
 	unsigned int sample_cnt;
+	unsigned int l_step_cnt;
+	unsigned int l_sample_cnt;
 	unsigned int target_speed;
 	int ret;
 
@@ -443,11 +538,11 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
 	if (target_speed > MAX_FS_MODE_SPEED) {
 		/* Set master code speed register */
 		ret = mtk_i2c_calculate_speed(i2c, clk_src, MAX_FS_MODE_SPEED,
-					      &step_cnt, &sample_cnt);
+					      &l_step_cnt, &l_sample_cnt);
 		if (ret < 0)
 			return ret;
 
-		i2c->timing_reg = (sample_cnt << 8) | step_cnt;
+		i2c->timing_reg = (l_sample_cnt << 8) | l_step_cnt;
 
 		/* Set the high speed mode register */
 		ret = mtk_i2c_calculate_speed(i2c, clk_src, target_speed,
@@ -457,6 +552,8 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
 
 		i2c->high_speed_reg = I2C_TIME_DEFAULT_VALUE |
 			(sample_cnt << 12) | (step_cnt << 8);
+		i2c->ltiming_reg = (l_sample_cnt << 6) | l_step_cnt |
+				   (sample_cnt << 12) | (step_cnt << 9);
 	} else {
 		ret = mtk_i2c_calculate_speed(i2c, clk_src, target_speed,
 					      &step_cnt, &sample_cnt);
@@ -467,6 +564,8 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
 
 		/* Disable the high speed transaction */
 		i2c->high_speed_reg = I2C_TIME_CLR_VALUE;
+
+		i2c->ltiming_reg = (sample_cnt << 6) | step_cnt;
 	}
 
 	return 0;
@@ -483,6 +582,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 	u16 addr_reg;
 	u16 start_reg;
 	u16 control_reg;
+	u16 fifo_clr_reg = I2C_FIFO_ADDR_CLR;
 	u16 restart_flag = 0;
 	u32 reg_4g_mode;
 	u8 *dma_rd_buf = NULL;
@@ -519,13 +619,21 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 
 	/* Clear interrupt status */
 	mtk_i2c_writew(i2c, restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
-	       I2C_TRANSAC_COMP, OFFSET_INTR_STAT);
+			    I2C_ARB_LOST | I2C_TRANSAC_COMP,
+			    OFFSET_INTR_STAT);
+
+	if (i2c->share_i3c)
+		fifo_clr_reg |= I2C_FIFO_ADDR_CLRH;
 
-	mtk_i2c_writew(i2c, I2C_FIFO_ADDR_CLR, OFFSET_FIFO_ADDR_CLR);
+	mtk_i2c_writew(i2c, fifo_clr_reg, OFFSET_FIFO_ADDR_CLR);
+
+	if ((i2c->speed_hz > MAX_FS_MODE_SPEED) && i2c->share_i3c)
+		mtk_i2c_writew(i2c, I2C_HFIFO_DATA, OFFSET_HFIFO_DATA);
 
 	/* Enable interrupt */
 	mtk_i2c_writew(i2c, restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
-	       I2C_TRANSAC_COMP, OFFSET_INTR_MASK);
+			    I2C_ARB_LOST | I2C_TRANSAC_COMP,
+			    OFFSET_INTR_MASK);
 
 	/* Set transfer and transaction len */
 	if (i2c->op == I2C_MASTER_WRRD) {
@@ -659,7 +767,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
 
 	/* Clear interrupt mask */
 	mtk_i2c_writew(i2c, ~(restart_flag | I2C_HS_NACKERR | I2C_ACKERR |
-	       I2C_TRANSAC_COMP), OFFSET_INTR_MASK);
+			    I2C_ARB_LOST | I2C_TRANSAC_COMP), OFFSET_INTR_MASK);
 
 	if (i2c->op == I2C_MASTER_WR) {
 		dma_unmap_single(i2c->dev, wpaddr,
@@ -817,6 +925,7 @@ static int mtk_i2c_parse_dt(struct device_node *np, struct mtk_i2c *i2c)
 	if (i2c->clk_src_div == 0)
 		return -EINVAL;
 
+	i2c->share_i3c = of_property_read_bool(np, "mediatek,share-i3c");
 	i2c->have_pmic = of_property_read_bool(np, "mediatek,have-pmic");
 	i2c->use_push_pull =
 		of_property_read_bool(np, "mediatek,use-push-pull");
@@ -884,6 +993,10 @@ static int mtk_i2c_probe(struct platform_device *pdev)
 		return PTR_ERR(i2c->clk_dma);
 	}
 
+	i2c->clk_arb = devm_clk_get(&pdev->dev, "arb");
+	if (IS_ERR(i2c->clk_arb))
+		i2c->clk_arb = NULL;
+
 	clk = i2c->clk_main;
 	if (i2c->have_pmic) {
 		i2c->clk_pmic = devm_clk_get(&pdev->dev, "pmic");
-- 
1.7.9.5


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