mfd: simple-mfd-i2c: Add Delta TN48M CPLD support

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.

Fixes: b3dcb5de6209 ("gpio: Add Delta TN48M CPLD GPIO driver")
Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Link: https://lore.kernel.org/20220131133049.77780-2-robert.marko@sartura.hr
Link: https://lore.kernel.org/linux-gpio/20260112064950.3837737-1-rdunlap@infradead.org/
Signed-off-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260112-mfd-tn48m-v11-1-00c798d8cd2a@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 7b8d6868e17024c3d9b5c147180697c0ab056172..7192c9d1d268e93d1557ca6519ac96056e37e221 100644 (file)
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -407,6 +407,17 @@ config MFD_CS47L92
        help
          Support for Cirrus Logic CS42L92, CS47L92 and CS47L93 Smart Codecs
 
+config MFD_TN48M_CPLD
+       tristate "Delta Networks TN48M switch CPLD driver"
+       depends on I2C
+       depends on ARCH_MVEBU || COMPILE_TEST
+       select MFD_SIMPLE_MFD_I2C
+       help
+         Select this option to enable support for Delta Networks TN48M switch
+         CPLD. It consists of reset and GPIO drivers. CPLD provides GPIOS-s
+         for the SFP slots as well as power supply related information.
+         SFP support depends on the GPIO driver being selected.
+
 config PMIC_DA903X
        bool "Dialog Semiconductor DA9030/DA9034 PMIC Support"
        depends on I2C=y

diff --git a/drivers/mfd/simple-mfd-i2c.c b/drivers/mfd/simple-mfd-i2c.c
index 8b751d8e3b5ae4df74874d2c581ee48184bfb7d9..7315fad618e4452649508e67254e80db7e1149eb 100644 (file)
--- a/drivers/mfd/simple-mfd-i2c.c
+++ b/drivers/mfd/simple-mfd-i2c.c
@@ -116,6 +116,7 @@ static const struct simple_mfd_data spacemit_p1 = {
 };
 
 static const struct of_device_id simple_mfd_i2c_of_match[] = {
+       { .compatible = "delta,tn48m-cpld" },
        { .compatible = "fsl,ls1028aqds-fpga" },
        { .compatible = "fsl,lx2160aqds-fpga" },
        { .compatible = "fsl,lx2160ardb-fpga" },