linux-kernel - [PATCH] platform/mellanox: MLXREG

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Message-ID: <20250502001622.674263-1-rdunlap@infradead.org>
Date: Thu,  1 May 2025 17:16:20 -0700
From: Randy Dunlap <rdunlap@...radead.org>
To: linux-kernel@...r.kernel.org
Cc: Randy Dunlap <rdunlap@...radead.org>,
	Vadim Pasternak <vadimp@...dia.com>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	Hans de Goede <hdegoede@...hat.com>,
	platform-driver-x86@...r.kernel.org
Subject: [PATCH] platform/mellanox: MLXREG_DPU depends on I2C

WARNING: unmet direct dependencies detected for REGMAP_I2C
  Depends on [m]: I2C [=m]
  Selected by [y]:
  - MLXREG_DPU [=y] && MELLANOX_PLATFORM [=y]

Without the dependency, REGMAP_I2C=y since MLXREG_DPU=y.
Since CONFIG_I2C=m, this causes many (> 230) unmet dependency warnings.
E.g.:
  Selected by [m]:
  - EEPROM_AT24 [=m] && I2C [=m] && SYSFS [=y]
  - SERIAL_MAX310X [=m] && TTY [=y] && HAS_IOMEM [=y] && SPI_MASTER [=y] && I2C [=m]
  - PINCTRL_AW9523 [=m] && PINCTRL [=y] && OF [=y] && I2C [=m]
  - PINCTRL_CY8C95X0 [=m] && PINCTRL [=y] && I2C [=m]
  - GPIO_FXL6408 [=m] && GPIOLIB [=y] && I2C [=m]
  - GPIO_DS4520 [=m] && GPIOLIB [=y] && I2C [=m]
  - GPIO_PCA953X [=m] && GPIOLIB [=y] && I2C [=m]
  - IP5XXX_POWER [=m] && POWER_SUPPLY [=y] && I2C [=m]
  - BATTERY_CW2015 [=m] && POWER_SUPPLY [=y] && I2C [=m]
  - CHARGER_SBS [=m] && POWER_SUPPLY [=y] && I2C [=m]

Fixes: 3e75f2954116 ("platform/mellanox: mlxreg-dpu: Add initial support for Nvidia DPU")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Vadim Pasternak <vadimp@...dia.com>
Cc: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: Hans de Goede <hdegoede@...hat.com>
Cc: platform-driver-x86@...r.kernel.org
---
 drivers/platform/mellanox/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- linux-next-20250501.orig/drivers/platform/mellanox/Kconfig
+++ linux-next-20250501/drivers/platform/mellanox/Kconfig
@@ -29,6 +29,7 @@ config MLX_PLATFORM
 
 config MLXREG_DPU
 	tristate "Nvidia Data Processor Unit platform driver support"
+	depends on I2C
 	select REGMAP_I2C
 	help
 	  This driver provides support for the Nvidia BF3 Data Processor Units,