1. Patchew
  2. linux
  3. View series

[PATCH] iio: adc: ad7173: fix num_slots on most chips

David Lechner posted 1 patch 3 months ago 
drivers/iio/adc/ad7173.c | 37 +++++++++++++++++++++++++++----------
1 file changed, 27 insertions(+), 10 deletions(-)
[PATCH] iio: adc: ad7173: fix num_slots on most chips
Posted by David Lechner 3 months ago 
Fix the num_slots value for most chips in the ad7173 driver. The number
of slots corresponds to the number of CHANNEL registers on each chip.

Fixes: 4310e15b3140 ("iio: adc: ad7173: don't make copy of ad_sigma_delta_info struct")
Signed-off-by: David Lechner <dlechner@baylibre.com>
---
FYI, the bug actually existed before the commit I used for Fixes:, but
that commit did major refactoring involving multiple drivers that would
be too complicated to try to backport to older kernels.

I will try to send a separate fix to stable@ to fix the bug in it's
original form on older kernels as that is just a one-liner.
---
 drivers/iio/adc/ad7173.c | 37 +++++++++++++++++++++++++++----------
 1 file changed, 27 insertions(+), 10 deletions(-)

diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c
index dd9fa35555c79ead5a1b88d1dc6cc3db122502be..9c197cea11eb955becf4b9b97246379fa9c5da13 100644
--- a/drivers/iio/adc/ad7173.c
+++ b/drivers/iio/adc/ad7173.c
@@ -771,10 +771,27 @@ static const struct ad_sigma_delta_info ad7173_sigma_delta_info_8_slots = {
 	.num_slots = 8,
 };
 
+static const struct ad_sigma_delta_info ad7173_sigma_delta_info_16_slots = {
+	.set_channel = ad7173_set_channel,
+	.append_status = ad7173_append_status,
+	.disable_all = ad7173_disable_all,
+	.disable_one = ad7173_disable_one,
+	.set_mode = ad7173_set_mode,
+	.has_registers = true,
+	.has_named_irqs = true,
+	.supports_spi_offload = true,
+	.addr_shift = 0,
+	.read_mask = BIT(6),
+	.status_ch_mask = GENMASK(3, 0),
+	.data_reg = AD7173_REG_DATA,
+	.num_resetclks = 64,
+	.num_slots = 16,
+};
+
 static const struct ad7173_device_info ad4111_device_info = {
 	.name = "ad4111",
 	.id = AD4111_ID,
-	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.sd_info = &ad7173_sigma_delta_info_16_slots,
 	.num_voltage_in_div = 8,
 	.num_channels = 16,
 	.num_configs = 8,
@@ -796,7 +813,7 @@ static const struct ad7173_device_info ad4111_device_info = {
 static const struct ad7173_device_info ad4112_device_info = {
 	.name = "ad4112",
 	.id = AD4112_ID,
-	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.sd_info = &ad7173_sigma_delta_info_16_slots,
 	.num_voltage_in_div = 8,
 	.num_channels = 16,
 	.num_configs = 8,
@@ -817,7 +834,7 @@ static const struct ad7173_device_info ad4112_device_info = {
 static const struct ad7173_device_info ad4113_device_info = {
 	.name = "ad4113",
 	.id = AD4113_ID,
-	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.sd_info = &ad7173_sigma_delta_info_16_slots,
 	.num_voltage_in_div = 8,
 	.num_channels = 16,
 	.num_configs = 8,
@@ -836,7 +853,7 @@ static const struct ad7173_device_info ad4113_device_info = {
 static const struct ad7173_device_info ad4114_device_info = {
 	.name = "ad4114",
 	.id = AD4114_ID,
-	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.sd_info = &ad7173_sigma_delta_info_16_slots,
 	.num_voltage_in_div = 16,
 	.num_channels = 16,
 	.num_configs = 8,
@@ -855,7 +872,7 @@ static const struct ad7173_device_info ad4114_device_info = {
 static const struct ad7173_device_info ad4115_device_info = {
 	.name = "ad4115",
 	.id = AD4115_ID,
-	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.sd_info = &ad7173_sigma_delta_info_16_slots,
 	.num_voltage_in_div = 16,
 	.num_channels = 16,
 	.num_configs = 8,
@@ -874,7 +891,7 @@ static const struct ad7173_device_info ad4115_device_info = {
 static const struct ad7173_device_info ad4116_device_info = {
 	.name = "ad4116",
 	.id = AD4116_ID,
-	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.sd_info = &ad7173_sigma_delta_info_16_slots,
 	.num_voltage_in_div = 11,
 	.num_channels = 16,
 	.num_configs = 8,
@@ -893,7 +910,7 @@ static const struct ad7173_device_info ad4116_device_info = {
 static const struct ad7173_device_info ad7172_2_device_info = {
 	.name = "ad7172-2",
 	.id = AD7172_2_ID,
-	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.sd_info = &ad7173_sigma_delta_info_4_slots,
 	.num_voltage_in = 5,
 	.num_channels = 4,
 	.num_configs = 4,
@@ -926,7 +943,7 @@ static const struct ad7173_device_info ad7172_4_device_info = {
 static const struct ad7173_device_info ad7173_8_device_info = {
 	.name = "ad7173-8",
 	.id = AD7173_ID,
-	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.sd_info = &ad7173_sigma_delta_info_16_slots,
 	.num_voltage_in = 17,
 	.num_channels = 16,
 	.num_configs = 8,
@@ -943,7 +960,7 @@ static const struct ad7173_device_info ad7173_8_device_info = {
 static const struct ad7173_device_info ad7175_2_device_info = {
 	.name = "ad7175-2",
 	.id = AD7175_2_ID,
-	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.sd_info = &ad7173_sigma_delta_info_4_slots,
 	.num_voltage_in = 5,
 	.num_channels = 4,
 	.num_configs = 4,
@@ -960,7 +977,7 @@ static const struct ad7173_device_info ad7175_2_device_info = {
 static const struct ad7173_device_info ad7175_8_device_info = {
 	.name = "ad7175-8",
 	.id = AD7175_8_ID,
-	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.sd_info = &ad7173_sigma_delta_info_16_slots,
 	.num_voltage_in = 17,
 	.num_channels = 16,
 	.num_configs = 8,

---
base-commit: 6742eff60460e77158d4f1b233f17e0345c9e66a
change-id: 20250703-iio-adc-ad7173-fix-num_slots-on-most-chips-b982206a20b1

Best regards,
-- 
David Lechner <dlechner@baylibre.com>
Re: [PATCH] iio: adc: ad7173: fix num_slots on most chips
Posted by kernel test robot 3 months ago 
Hi David,

kernel test robot noticed the following build errors:

[auto build test ERROR on 6742eff60460e77158d4f1b233f17e0345c9e66a]

url:    https://github.com/intel-lab-lkp/linux/commits/David-Lechner/iio-adc-ad7173-fix-num_slots-on-most-chips/20250704-061744
base:   6742eff60460e77158d4f1b233f17e0345c9e66a
patch link:    https://lore.kernel.org/r/20250703-iio-adc-ad7173-fix-num_slots-on-most-chips-v1-1-326c5d113e15%40baylibre.com
patch subject: [PATCH] iio: adc: ad7173: fix num_slots on most chips
config: x86_64-buildonly-randconfig-004-20250704 (https://download.01.org/0day-ci/archive/20250705/202507050018.iWEJiG04-lkp@intel.com/config)
compiler: clang version 20.1.7 (https://github.com/llvm/llvm-project 6146a88f60492b520a36f8f8f3231e15f3cc6082)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250705/202507050018.iWEJiG04-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202507050018.iWEJiG04-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/iio/adc/ad7173.c:782:3: error: field designator 'supports_spi_offload' does not refer to any field in type 'const struct ad_sigma_delta_info'
     782 |         .supports_spi_offload = true,
         |         ~^~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 error generated.


vim +782 drivers/iio/adc/ad7173.c

   773	
   774	static const struct ad_sigma_delta_info ad7173_sigma_delta_info_16_slots = {
   775		.set_channel = ad7173_set_channel,
   776		.append_status = ad7173_append_status,
   777		.disable_all = ad7173_disable_all,
   778		.disable_one = ad7173_disable_one,
   779		.set_mode = ad7173_set_mode,
   780		.has_registers = true,
   781		.has_named_irqs = true,
 > 782		.supports_spi_offload = true,
   783		.addr_shift = 0,
   784		.read_mask = BIT(6),
   785		.status_ch_mask = GENMASK(3, 0),
   786		.data_reg = AD7173_REG_DATA,
   787		.num_resetclks = 64,
   788		.num_slots = 16,
   789	};
   790	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
Re: [PATCH] iio: adc: ad7173: fix num_slots on most chips
Posted by Jonathan Cameron 3 months ago 
On Thu, 03 Jul 2025 17:16:31 -0500
David Lechner <dlechner@baylibre.com> wrote:

> Fix the num_slots value for most chips in the ad7173 driver. The number
> of slots corresponds to the number of CHANNEL registers on each chip.
> 
> Fixes: 4310e15b3140 ("iio: adc: ad7173: don't make copy of ad_sigma_delta_info struct")
> Signed-off-by: David Lechner <dlechner@baylibre.com>

Perhaps worth calling out that for many chips it seems to be falsely limiting
the number of slots which is a functionality limitation I think rather
than a bug.  The ones going the other way are more of a problem though!

Jonathan

> ---
> FYI, the bug actually existed before the commit I used for Fixes:, but
> that commit did major refactoring involving multiple drivers that would
> be too complicated to try to backport to older kernels.
> 
> I will try to send a separate fix to stable@ to fix the bug in it's
> original form on older kernels as that is just a one-liner.
> ---
>  drivers/iio/adc/ad7173.c | 37 +++++++++++++++++++++++++++----------
>  1 file changed, 27 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c
> index dd9fa35555c79ead5a1b88d1dc6cc3db122502be..9c197cea11eb955becf4b9b97246379fa9c5da13 100644
> --- a/drivers/iio/adc/ad7173.c
> +++ b/drivers/iio/adc/ad7173.c
> @@ -771,10 +771,27 @@ static const struct ad_sigma_delta_info ad7173_sigma_delta_info_8_slots = {
>  	.num_slots = 8,
>  };
>  
> +static const struct ad_sigma_delta_info ad7173_sigma_delta_info_16_slots = {
> +	.set_channel = ad7173_set_channel,
> +	.append_status = ad7173_append_status,
> +	.disable_all = ad7173_disable_all,
> +	.disable_one = ad7173_disable_one,
> +	.set_mode = ad7173_set_mode,
> +	.has_registers = true,
> +	.has_named_irqs = true,
> +	.supports_spi_offload = true,
> +	.addr_shift = 0,
> +	.read_mask = BIT(6),
> +	.status_ch_mask = GENMASK(3, 0),
> +	.data_reg = AD7173_REG_DATA,
> +	.num_resetclks = 64,
> +	.num_slots = 16,
> +};
> +
>  static const struct ad7173_device_info ad4111_device_info = {
>  	.name = "ad4111",
>  	.id = AD4111_ID,
> -	.sd_info = &ad7173_sigma_delta_info_8_slots,
> +	.sd_info = &ad7173_sigma_delta_info_16_slots,
>  	.num_voltage_in_div = 8,
>  	.num_channels = 16,
>  	.num_configs = 8,
> @@ -796,7 +813,7 @@ static const struct ad7173_device_info ad4111_device_info = {
>  static const struct ad7173_device_info ad4112_device_info = {
>  	.name = "ad4112",
>  	.id = AD4112_ID,
> -	.sd_info = &ad7173_sigma_delta_info_8_slots,
> +	.sd_info = &ad7173_sigma_delta_info_16_slots,
>  	.num_voltage_in_div = 8,
>  	.num_channels = 16,
>  	.num_configs = 8,
> @@ -817,7 +834,7 @@ static const struct ad7173_device_info ad4112_device_info = {
>  static const struct ad7173_device_info ad4113_device_info = {
>  	.name = "ad4113",
>  	.id = AD4113_ID,
> -	.sd_info = &ad7173_sigma_delta_info_8_slots,
> +	.sd_info = &ad7173_sigma_delta_info_16_slots,
>  	.num_voltage_in_div = 8,
>  	.num_channels = 16,
>  	.num_configs = 8,
> @@ -836,7 +853,7 @@ static const struct ad7173_device_info ad4113_device_info = {
>  static const struct ad7173_device_info ad4114_device_info = {
>  	.name = "ad4114",
>  	.id = AD4114_ID,
> -	.sd_info = &ad7173_sigma_delta_info_8_slots,
> +	.sd_info = &ad7173_sigma_delta_info_16_slots,
>  	.num_voltage_in_div = 16,
>  	.num_channels = 16,
>  	.num_configs = 8,
> @@ -855,7 +872,7 @@ static const struct ad7173_device_info ad4114_device_info = {
>  static const struct ad7173_device_info ad4115_device_info = {
>  	.name = "ad4115",
>  	.id = AD4115_ID,
> -	.sd_info = &ad7173_sigma_delta_info_8_slots,
> +	.sd_info = &ad7173_sigma_delta_info_16_slots,
>  	.num_voltage_in_div = 16,
>  	.num_channels = 16,
>  	.num_configs = 8,
> @@ -874,7 +891,7 @@ static const struct ad7173_device_info ad4115_device_info = {
>  static const struct ad7173_device_info ad4116_device_info = {
>  	.name = "ad4116",
>  	.id = AD4116_ID,
> -	.sd_info = &ad7173_sigma_delta_info_8_slots,
> +	.sd_info = &ad7173_sigma_delta_info_16_slots,
>  	.num_voltage_in_div = 11,
>  	.num_channels = 16,
>  	.num_configs = 8,
> @@ -893,7 +910,7 @@ static const struct ad7173_device_info ad4116_device_info = {
>  static const struct ad7173_device_info ad7172_2_device_info = {
>  	.name = "ad7172-2",
>  	.id = AD7172_2_ID,
> -	.sd_info = &ad7173_sigma_delta_info_8_slots,
> +	.sd_info = &ad7173_sigma_delta_info_4_slots,
>  	.num_voltage_in = 5,
>  	.num_channels = 4,
>  	.num_configs = 4,
> @@ -926,7 +943,7 @@ static const struct ad7173_device_info ad7172_4_device_info = {
>  static const struct ad7173_device_info ad7173_8_device_info = {
>  	.name = "ad7173-8",
>  	.id = AD7173_ID,
> -	.sd_info = &ad7173_sigma_delta_info_8_slots,
> +	.sd_info = &ad7173_sigma_delta_info_16_slots,
>  	.num_voltage_in = 17,
>  	.num_channels = 16,
>  	.num_configs = 8,
> @@ -943,7 +960,7 @@ static const struct ad7173_device_info ad7173_8_device_info = {
>  static const struct ad7173_device_info ad7175_2_device_info = {
>  	.name = "ad7175-2",
>  	.id = AD7175_2_ID,
> -	.sd_info = &ad7173_sigma_delta_info_8_slots,
> +	.sd_info = &ad7173_sigma_delta_info_4_slots,
>  	.num_voltage_in = 5,
>  	.num_channels = 4,
>  	.num_configs = 4,
> @@ -960,7 +977,7 @@ static const struct ad7173_device_info ad7175_2_device_info = {
>  static const struct ad7173_device_info ad7175_8_device_info = {
>  	.name = "ad7175-8",
>  	.id = AD7175_8_ID,
> -	.sd_info = &ad7173_sigma_delta_info_8_slots,
> +	.sd_info = &ad7173_sigma_delta_info_16_slots,
>  	.num_voltage_in = 17,
>  	.num_channels = 16,
>  	.num_configs = 8,
> 
> ---
> base-commit: 6742eff60460e77158d4f1b233f17e0345c9e66a
> change-id: 20250703-iio-adc-ad7173-fix-num_slots-on-most-chips-b982206a20b1
> 
> Best regards,

Patchew 2.1-devel-b67e4c2

© 2016 - 2025 Red Hat, Inc.