The I2C_DETECT register is at IO port 0x1a7, which is outside the range
passed to devm_ioport_map() for io_base, and was only working because
there aren't actually any bounds checks for IO port accesses.
Extending the range does not seem like a good solution here, as it would
then conflict with the IO resource assigned to the I2C controller. As
this is just a one-off access during probe, use a simple inb() instead.
While we're at it, drop the unused define TQMX86_REG_I2C_INT_EN.
Fixes: 2f17dd34ffed ("mfd: tqmx86: IO controller with I2C, Wachdog and GPIO")
Signed-off-by: Matthias Schiffer <[email protected]>
---
Notes:
v2: add comment regarding use of inb() as suggested by Andrew
drivers/mfd/tqmx86.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/mfd/tqmx86.c b/drivers/mfd/tqmx86.c
index 7ae906ff8e353..31d0efb5aacf8 100644
--- a/drivers/mfd/tqmx86.c
+++ b/drivers/mfd/tqmx86.c
@@ -49,9 +49,8 @@
#define TQMX86_REG_IO_EXT_INT_MASK 0x3
#define TQMX86_REG_IO_EXT_INT_GPIO_SHIFT 4
-#define TQMX86_REG_I2C_DETECT 0x47
+#define TQMX86_REG_I2C_DETECT 0x1a7
#define TQMX86_REG_I2C_DETECT_SOFT 0xa5
-#define TQMX86_REG_I2C_INT_EN 0x49
static uint gpio_irq;
module_param(gpio_irq, uint, 0);
@@ -213,7 +212,12 @@ static int tqmx86_probe(struct platform_device *pdev)
"Found %s - Board ID %d, PCB Revision %d, PLD Revision %d\n",
board_name, board_id, rev >> 4, rev & 0xf);
- i2c_det = ioread8(io_base + TQMX86_REG_I2C_DETECT);
+ /*
+ * The I2C_DETECT register is in the range assigned to the I2C driver
+ * later, so we don't extend TQMX86_IOSIZE. Use inb() for this one-off
+ * access instead of ioport_map + unmap.
+ */
+ i2c_det = inb(TQMX86_REG_I2C_DETECT);
if (gpio_irq_cfg) {
io_ext_int_val =
--
2.34.1
Registers 0x160..0x17f are unassigned. Use 0x180 as base register and
update offets accordingly.
Also change the size of the range to include 0x19f. While 0x19f is
currently reserved for future extensions, so are several of the previous
registers up to 0x19e, and it is weird to leave out just the last one.
Fixes: 2f17dd34ffed ("mfd: tqmx86: IO controller with I2C, Wachdog and GPIO")
Signed-off-by: Matthias Schiffer <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
---
Notes:
v2: add Reviewed-by from v1
drivers/mfd/tqmx86.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/mfd/tqmx86.c b/drivers/mfd/tqmx86.c
index 31d0efb5aacf8..958334f14eb00 100644
--- a/drivers/mfd/tqmx86.c
+++ b/drivers/mfd/tqmx86.c
@@ -16,8 +16,8 @@
#include <linux/platform_data/i2c-ocores.h>
#include <linux/platform_device.h>
-#define TQMX86_IOBASE 0x160
-#define TQMX86_IOSIZE 0x3f
+#define TQMX86_IOBASE 0x180
+#define TQMX86_IOSIZE 0x20
#define TQMX86_IOBASE_I2C 0x1a0
#define TQMX86_IOSIZE_I2C 0xa
#define TQMX86_IOBASE_WATCHDOG 0x18b
@@ -25,7 +25,7 @@
#define TQMX86_IOBASE_GPIO 0x18d
#define TQMX86_IOSIZE_GPIO 0x4
-#define TQMX86_REG_BOARD_ID 0x20
+#define TQMX86_REG_BOARD_ID 0x00
#define TQMX86_REG_BOARD_ID_E38M 1
#define TQMX86_REG_BOARD_ID_50UC 2
#define TQMX86_REG_BOARD_ID_E38C 3
@@ -40,8 +40,8 @@
#define TQMX86_REG_BOARD_ID_E40S 13
#define TQMX86_REG_BOARD_ID_E40C1 14
#define TQMX86_REG_BOARD_ID_E40C2 15
-#define TQMX86_REG_BOARD_REV 0x21
-#define TQMX86_REG_IO_EXT_INT 0x26
+#define TQMX86_REG_BOARD_REV 0x01
+#define TQMX86_REG_IO_EXT_INT 0x06
#define TQMX86_REG_IO_EXT_INT_NONE 0
#define TQMX86_REG_IO_EXT_INT_7 1
#define TQMX86_REG_IO_EXT_INT_9 2
--
2.34.1
It seems that this driver was developed based on preliminary documentation.
Report the correct names for all TQMxE39x variants, as they are used by
the released hardware revisions:
- Fix names for TQMxE39C1/C2 board IDs
- Distinguish TQMxE39M and TQMxE39S, which use the same board ID
The TQMxE39M/S are distinguished using the SAUC (Sanctioned Alternate
Uses Configuration) register of the GPIO controller. This also prepares
for the correct handling of the differences between the GPIO controllers
of our COMe and SMARC modules.
Fixes: 2f17dd34ffed ("mfd: tqmx86: IO controller with I2C, Wachdog and GPIO")
Signed-off-by: Matthias Schiffer <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
---
Notes:
v2: add Reviewed-by from v1
drivers/mfd/tqmx86.c | 32 +++++++++++++++++---------------
1 file changed, 17 insertions(+), 15 deletions(-)
diff --git a/drivers/mfd/tqmx86.c b/drivers/mfd/tqmx86.c
index 958334f14eb00..fac02875fe7d9 100644
--- a/drivers/mfd/tqmx86.c
+++ b/drivers/mfd/tqmx86.c
@@ -30,9 +30,9 @@
#define TQMX86_REG_BOARD_ID_50UC 2
#define TQMX86_REG_BOARD_ID_E38C 3
#define TQMX86_REG_BOARD_ID_60EB 4
-#define TQMX86_REG_BOARD_ID_E39M 5
-#define TQMX86_REG_BOARD_ID_E39C 6
-#define TQMX86_REG_BOARD_ID_E39x 7
+#define TQMX86_REG_BOARD_ID_E39MS 5
+#define TQMX86_REG_BOARD_ID_E39C1 6
+#define TQMX86_REG_BOARD_ID_E39C2 7
#define TQMX86_REG_BOARD_ID_70EB 8
#define TQMX86_REG_BOARD_ID_80UC 9
#define TQMX86_REG_BOARD_ID_110EB 11
@@ -48,6 +48,7 @@
#define TQMX86_REG_IO_EXT_INT_12 3
#define TQMX86_REG_IO_EXT_INT_MASK 0x3
#define TQMX86_REG_IO_EXT_INT_GPIO_SHIFT 4
+#define TQMX86_REG_SAUC 0x17
#define TQMX86_REG_I2C_DETECT 0x1a7
#define TQMX86_REG_I2C_DETECT_SOFT 0xa5
@@ -110,7 +111,7 @@ static const struct mfd_cell tqmx86_devs[] = {
},
};
-static const char *tqmx86_board_id_to_name(u8 board_id)
+static const char *tqmx86_board_id_to_name(u8 board_id, u8 sauc)
{
switch (board_id) {
case TQMX86_REG_BOARD_ID_E38M:
@@ -121,12 +122,12 @@ static const char *tqmx86_board_id_to_name(u8 board_id)
return "TQMxE38C";
case TQMX86_REG_BOARD_ID_60EB:
return "TQMx60EB";
- case TQMX86_REG_BOARD_ID_E39M:
- return "TQMxE39M";
- case TQMX86_REG_BOARD_ID_E39C:
- return "TQMxE39C";
- case TQMX86_REG_BOARD_ID_E39x:
- return "TQMxE39x";
+ case TQMX86_REG_BOARD_ID_E39MS:
+ return (sauc == 0xff) ? "TQMxE39M" : "TQMxE39S";
+ case TQMX86_REG_BOARD_ID_E39C1:
+ return "TQMxE39C1";
+ case TQMX86_REG_BOARD_ID_E39C2:
+ return "TQMxE39C2";
case TQMX86_REG_BOARD_ID_70EB:
return "TQMx70EB";
case TQMX86_REG_BOARD_ID_80UC:
@@ -159,9 +160,9 @@ static int tqmx86_board_id_to_clk_rate(struct device *dev, u8 board_id)
case TQMX86_REG_BOARD_ID_E40C1:
case TQMX86_REG_BOARD_ID_E40C2:
return 24000;
- case TQMX86_REG_BOARD_ID_E39M:
- case TQMX86_REG_BOARD_ID_E39C:
- case TQMX86_REG_BOARD_ID_E39x:
+ case TQMX86_REG_BOARD_ID_E39MS:
+ case TQMX86_REG_BOARD_ID_E39C1:
+ case TQMX86_REG_BOARD_ID_E39C2:
return 25000;
case TQMX86_REG_BOARD_ID_E38M:
case TQMX86_REG_BOARD_ID_E38C:
@@ -175,7 +176,7 @@ static int tqmx86_board_id_to_clk_rate(struct device *dev, u8 board_id)
static int tqmx86_probe(struct platform_device *pdev)
{
- u8 board_id, rev, i2c_det, io_ext_int_val;
+ u8 board_id, sauc, rev, i2c_det, io_ext_int_val;
struct device *dev = &pdev->dev;
u8 gpio_irq_cfg, readback;
const char *board_name;
@@ -205,7 +206,8 @@ static int tqmx86_probe(struct platform_device *pdev)
return -ENOMEM;
board_id = ioread8(io_base + TQMX86_REG_BOARD_ID);
- board_name = tqmx86_board_id_to_name(board_id);
+ sauc = ioread8(io_base + TQMX86_REG_SAUC);
+ board_name = tqmx86_board_id_to_name(board_id, sauc);
rev = ioread8(io_base + TQMX86_REG_BOARD_REV);
dev_info(dev,
--
2.34.1
On Mon, Feb 20, 2023 at 12:25:44PM +0100, Matthias Schiffer wrote:
> The I2C_DETECT register is at IO port 0x1a7, which is outside the range
> passed to devm_ioport_map() for io_base, and was only working because
> there aren't actually any bounds checks for IO port accesses.
>
> Extending the range does not seem like a good solution here, as it would
> then conflict with the IO resource assigned to the I2C controller. As
> this is just a one-off access during probe, use a simple inb() instead.
>
> While we're at it, drop the unused define TQMX86_REG_I2C_INT_EN.
>
> Fixes: 2f17dd34ffed ("mfd: tqmx86: IO controller with I2C, Wachdog and GPIO")
> Signed-off-by: Matthias Schiffer <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Andrew
On Mon, 20 Feb 2023, Matthias Schiffer wrote:
> The I2C_DETECT register is at IO port 0x1a7, which is outside the range
> passed to devm_ioport_map() for io_base, and was only working because
> there aren't actually any bounds checks for IO port accesses.
>
> Extending the range does not seem like a good solution here, as it would
> then conflict with the IO resource assigned to the I2C controller. As
> this is just a one-off access during probe, use a simple inb() instead.
>
> While we're at it, drop the unused define TQMX86_REG_I2C_INT_EN.
>
> Fixes: 2f17dd34ffed ("mfd: tqmx86: IO controller with I2C, Wachdog and GPIO")
> Signed-off-by: Matthias Schiffer <[email protected]>
> ---
>
> Notes:
> v2: add comment regarding use of inb() as suggested by Andrew
>
> drivers/mfd/tqmx86.c | 10 +++++++---
> 1 file changed, 7 insertions(+), 3 deletions(-)
Applied, thanks
--
Lee Jones [李琼斯]
On Mon, 20 Feb 2023, Matthias Schiffer wrote:
> Registers 0x160..0x17f are unassigned. Use 0x180 as base register and
> update offets accordingly.
>
> Also change the size of the range to include 0x19f. While 0x19f is
> currently reserved for future extensions, so are several of the previous
> registers up to 0x19e, and it is weird to leave out just the last one.
>
> Fixes: 2f17dd34ffed ("mfd: tqmx86: IO controller with I2C, Wachdog and GPIO")
> Signed-off-by: Matthias Schiffer <[email protected]>
> Reviewed-by: Andrew Lunn <[email protected]>
> ---
>
> Notes:
> v2: add Reviewed-by from v1
>
> drivers/mfd/tqmx86.c | 10 +++++-----
> 1 file changed, 5 insertions(+), 5 deletions(-)
Applied, thanks
--
Lee Jones [李琼斯]
On Mon, 20 Feb 2023, Matthias Schiffer wrote:
> It seems that this driver was developed based on preliminary documentation.
> Report the correct names for all TQMxE39x variants, as they are used by
> the released hardware revisions:
>
> - Fix names for TQMxE39C1/C2 board IDs
> - Distinguish TQMxE39M and TQMxE39S, which use the same board ID
>
> The TQMxE39M/S are distinguished using the SAUC (Sanctioned Alternate
> Uses Configuration) register of the GPIO controller. This also prepares
> for the correct handling of the differences between the GPIO controllers
> of our COMe and SMARC modules.
>
> Fixes: 2f17dd34ffed ("mfd: tqmx86: IO controller with I2C, Wachdog and GPIO")
> Signed-off-by: Matthias Schiffer <[email protected]>
> Reviewed-by: Andrew Lunn <[email protected]>
> ---
>
> Notes:
> v2: add Reviewed-by from v1
>
> drivers/mfd/tqmx86.c | 32 +++++++++++++++++---------------
> 1 file changed, 17 insertions(+), 15 deletions(-)
Applied, thanks
--
Lee Jones [李琼斯]