mfd: ab8500: Drop debugfs module

This debugfs isn't used by anyone, if we want to dump the contents
of registers we should just convert the driver to regmap instead.
I'm also excluding this from the device tree bindings when converting
to YAML because it is not a real device, and device trees should
only contain real physical devices.

Delete it.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20220212214724.681530-1-linus.walleij@linaro.org

drivers/mfd/Kconfig

@@ -1297,14 +1297,6 @@ config AB8500_CORE
 	  the irq_chip parts for handling the Mixed Signal chip events.
 	  This chip embeds various other multimedia functionalities as well.
 
-config AB8500_DEBUG
-	bool "Enable debug info via debugfs"
-	depends on AB8500_GPADC && DEBUG_FS
-	default y if DEBUG_FS
-	help
-	  Select this option if you want debug information using the debug
-	  filesystem, debugfs.
-
 config MFD_DB8500_PRCMU
 	bool "ST-Ericsson DB8500 Power Reset Control Management Unit"
 	depends on UX500_SOC_DB8500

drivers/mfd/Makefile

@@ -177,7 +177,6 @@ obj-$(CONFIG_MFD_PCF50633)	+= pcf50633.o
 obj-$(CONFIG_PCF50633_ADC)	+= pcf50633-adc.o
 obj-$(CONFIG_PCF50633_GPIO)	+= pcf50633-gpio.o
 obj-$(CONFIG_ABX500_CORE)	+= abx500-core.o
-obj-$(CONFIG_AB8500_DEBUG)	+= ab8500-debugfs.o
 obj-$(CONFIG_MFD_DB8500_PRCMU)	+= db8500-prcmu.o
 # ab8500-core need to come after db8500-prcmu (which provides the channel)
 obj-$(CONFIG_AB8500_CORE)	+= ab8500-core.o ab8500-sysctrl.o

drivers/mfd/ab8500-core.c

@@ -613,10 +613,6 @@ static const struct mfd_cell ab8500_bm_devs[] = {
 };
 
 static const struct mfd_cell ab8500_devs[] = {
-#ifdef CONFIG_DEBUG_FS
-	MFD_CELL_OF("ab8500-debug",
-		    NULL, NULL, 0, 0, "stericsson,ab8500-debug"),
-#endif
 	MFD_CELL_OF("ab8500-sysctrl",
 		    NULL, NULL, 0, 0, "stericsson,ab8500-sysctrl"),
 	MFD_CELL_OF("ab8500-ext-regulator",
@@ -652,11 +648,6 @@ static const struct mfd_cell ab8500_devs[] = {
 };
 
 static const struct mfd_cell ab9540_devs[] = {
-#ifdef CONFIG_DEBUG_FS
-	{
-		.name = "ab8500-debug",
-	},
-#endif
 	{
 		.name = "ab8500-sysctrl",
 	},
@@ -707,12 +698,6 @@ static const struct mfd_cell ab9540_devs[] = {
 
 /* Device list for ab8505  */
 static const struct mfd_cell ab8505_devs[] = {
-#ifdef CONFIG_DEBUG_FS
-	{
-		.name = "ab8500-debug",
-		.of_compatible = "stericsson,ab8500-debug",
-	},
-#endif
 	{
 		.name = "ab8500-sysctrl",
 		.of_compatible = "stericsson,ab8500-sysctrl",
@@ -764,11 +749,6 @@ static const struct mfd_cell ab8505_devs[] = {
 };
 
 static const struct mfd_cell ab8540_devs[] = {
-#ifdef CONFIG_DEBUG_FS
-	{
-		.name = "ab8500-debug",
-	},
-#endif
 	{
 		.name = "ab8500-sysctrl",
 	},