[PATCH 6.19 590/781] mfd: simple-mfd-i2c: Add Delta TN48M CPLD support

Greg Kroah-Hartman
2026-02-25T01:37:55Z

From: Robert Marko <robert.marko@sartura.hr>

[ Upstream commit 8f34c1a64c5394d2b51d3fba197947dc4b0b48a0 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/mfd/Kconfig | 11 +++++++++++
drivers/mfd/simple-mfd-i2c.c | 1 +
2 files changed, 12 insertions(+)

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index aace5766b38aa..f7f12a0428aa2 100644
--- 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 8b751d8e3b5ae..7315fad618e44 100644
--- 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" },
--
2.51.0