Re: [PATCH v8 1/6] mfd: simple-mfd-i2c: Add Delta TN48M CPLD support

From: Michael Walle
Date: Fri Nov 05 2021 - 19:24:02 EST


Am 2021-11-05 12:38, schrieb Robert Marko:
Delta TN48M switches have a Lattice CPLD that serves
multiple purposes including being a GPIO expander.

So, lets use the simple I2C MFD driver to provide the MFD core.

Also add a virtual symbol which pulls in the simple-mfd-i2c driver and
provide a common symbol on which the subdevice drivers can depend on.

Signed-off-by: Robert Marko <robert.marko@xxxxxxxxxx>
Acked-for-MFD-by: Lee Jones <lee.jones@xxxxxxxxxx>
---
Changes in v2:
* Drop the custom MFD driver and header
* Use simple I2C MFD driver
---
drivers/mfd/Kconfig | 10 ++++++++++
drivers/mfd/simple-mfd-i2c.c | 1 +
2 files changed, 11 insertions(+)

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index ad15be6b86bc..3701657e831d 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -297,6 +297,16 @@ config MFD_ASIC3
This driver supports the ASIC3 multifunction chip found on many
PDAs (mainly iPAQ and HTC based ones)

+config MFD_TN48M_CPLD
+ tristate "Delta Networks TN48M switch CPLD driver"
+ depends on I2C
+ select MFD_SIMPLE_MFD_I2C

Is this device used on multiple architectures? See commit
de1292817cf73 (mfd: MFD_SL28CPLD should depend on ARCH_LAYERSCAPE).

-michael