Re: [PATCH v2] Add ISA ACPI sensor driver name support

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Hi,

On 8/11/20 2:38 AM, Ondřej Lysoněk wrote:
Hi,

Thanks for the patch!

Hoan Tran <Hoan@xxxxxxxxxxxxxxxxxxxxxx> writes:

From: Hoan Tran <hoan@xxxxxxxxxxxxxxxxxxxxxx>

ACPI hwmon sensor driver name has a different format such as
	APMC0D29:00
	APMC0D29:01

Do you know where the number 00/01 comes from? I'm trying to determine
if it's guaranteed to be stable across reboots.

I think it's based on the ACPI node order inside DSDT.


compared with DTB. This patch supports this format and gives
the correct device address as below

apm_xgene-isa-0000   => APMC0D29:00
Adapter: ISA adapter
SoC Temperature:  +35.0°C
CPU power:        11.00 W
IO power:         20.00 W

apm_xgene-isa-0001   => APMC0D29:01
Adapter: ISA adapter
SoC Temperature:  +33.0°C
CPU power:        13.00 W
IO power:         23.83 W

Signed-off-by: Hoan Tran <hoan@xxxxxxxxxxxxxxxxxxxxxx>
---
v2:
   Filter A-Z for the name

  lib/sysfs.c | 6 +++---
  1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/sysfs.c b/lib/sysfs.c
index e63688b7..e9db55d4 100644
--- a/lib/sysfs.c
+++ b/lib/sysfs.c
@@ -663,7 +663,7 @@ static int classify_device(const char *dev_name,
  	if ((!subsys || !strcmp(subsys, "platform") ||
  			!strcmp(subsys, "of_platform"))) {
  		/* must be new ISA (platform driver) */
-		if (sscanf(dev_name, "%*[a-z0-9_].%d", &entry->chip.addr) != 1)
+		if (sscanf(dev_name, "%*[a-zA-Z0-9_]%*[.:]%d", &entry->chip.addr) != 1)

Nit: I think this should be "%*[a-zA-Z0-9_]%*1[.:]%d", so that only a
single '.' or ':' character is matched.

Yes, it's true. I can fix it.

Regards
Hoan


Ondřej

  			entry->chip.addr = 0;
  		entry->chip.bus.type = SENSORS_BUS_TYPE_ISA;
  		entry->chip.bus.nr = 0;
@@ -938,7 +938,7 @@ int sensors_read_sysfs_attr(const sensors_chip_name *name,
  		if (res == EOF) {
  			if (errno == EIO)
  				return -SENSORS_ERR_IO;
-			else
+			else
  				return -SENSORS_ERR_ACCESS_R;
  		}
  		*value /= get_type_scaling(subfeature->type);
@@ -972,7 +972,7 @@ int sensors_write_sysfs_attr(const sensors_chip_name *name,
  		if (res == EOF) {
  			if (errno == EIO)
  				return -SENSORS_ERR_IO;
-			else
+			else
  				return -SENSORS_ERR_ACCESS_W;
  		}
  	} else
--
2.24.2




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