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Message-ID: <20260112064950.3837737-1-rdunlap@infradead.org>
Date: Sun, 11 Jan 2026 22:49:50 -0800
From: Randy Dunlap <rdunlap@...radead.org>
To: linux-kernel@...r.kernel.org
Cc: Randy Dunlap <rdunlap@...radead.org>,
Robert Marko <robert.marko@...tura.hr>,
Linus Walleij <linusw@...nel.org>,
Bartosz Golaszewski <brgl@...nel.org>,
linux-gpio@...r.kernel.org,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
devicetree@...r.kernel.org
Subject: [PATCH] gpio: remove the gpio-tn48m driver
The gpio-tn48m driver is useless without the simple-mfd parent, which is
not present in the kernel tree, so delete it and all references to it.
Also delete references to the (missing) mfd driver.
Fixes: b3dcb5de6209 ("gpio: Add Delta TN48M CPLD GPIO driver")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
---
Based on v6.19-rc4.
Cc: Robert Marko <robert.marko@...tura.hr>
Cc: Linus Walleij <linusw@...nel.org>
Cc: Bartosz Golaszewski <brgl@...nel.org>
Cc: linux-gpio@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Rob Herring <robh@...nel.org>
Cc: Krzysztof Kozlowski <krzk+dt@...nel.org>
Cc: Conor Dooley <conor+dt@...nel.org>
Cc: devicetree@...r.kernel.org
.../devicetree/bindings/gpio/delta,tn48m-gpio.yaml | 39 --------
.../devicetree/bindings/mfd/delta,tn48m-cpld.yaml | 90 -------------------
MAINTAINERS | 9 --
drivers/gpio/Kconfig | 12 ---
drivers/gpio/Makefile | 1 -
drivers/gpio/gpio-tn48m.c | 100 ---------------------
6 files changed, 251 deletions(-)
diff --git a/Documentation/devicetree/bindings/gpio/delta,tn48m-gpio.yaml b/Documentation/devicetree/bindings/gpio/delta,tn48m-gpio.yaml
deleted file mode 100644
index e3e668a12091..000000000000
--- a/Documentation/devicetree/bindings/gpio/delta,tn48m-gpio.yaml
+++ /dev/null
@@ -1,39 +0,0 @@
-# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
-%YAML 1.2
----
-$id: http://devicetree.org/schemas/gpio/delta,tn48m-gpio.yaml#
-$schema: http://devicetree.org/meta-schemas/core.yaml#
-
-title: Delta Networks TN48M CPLD GPIO controller
-
-maintainers:
- - Robert Marko <robert.marko@...tura.hr>
-
-description: |
- This module is part of the Delta TN48M multi-function device. For more
- details see ../mfd/delta,tn48m-cpld.yaml.
-
- Delta TN48M has an onboard Lattice CPLD that is used as an GPIO expander.
- It provides 12 pins in total, they are input-only or ouput-only type.
-
-properties:
- compatible:
- enum:
- - delta,tn48m-gpo
- - delta,tn48m-gpi
-
- reg:
- maxItems: 1
-
- "#gpio-cells":
- const: 2
-
- gpio-controller: true
-
-required:
- - compatible
- - reg
- - "#gpio-cells"
- - gpio-controller
-
-additionalProperties: false
diff --git a/Documentation/devicetree/bindings/mfd/delta,tn48m-cpld.yaml b/Documentation/devicetree/bindings/mfd/delta,tn48m-cpld.yaml
deleted file mode 100644
index d3b79140cce2..000000000000
--- a/Documentation/devicetree/bindings/mfd/delta,tn48m-cpld.yaml
+++ /dev/null
@@ -1,90 +0,0 @@
-# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
-%YAML 1.2
----
-$id: http://devicetree.org/schemas/mfd/delta,tn48m-cpld.yaml#
-$schema: http://devicetree.org/meta-schemas/core.yaml#
-
-title: Delta Networks TN48M CPLD controller
-
-maintainers:
- - Robert Marko <robert.marko@...tura.hr>
-
-description: |
- Lattice CPLD onboard the TN48M switches is used for system
- management.
-
- It provides information about the hardware model, revision,
- PSU status etc.
-
- It is also being used as a GPIO expander and reset controller
- for the switch MAC-s and other peripherals.
-
-properties:
- compatible:
- const: delta,tn48m-cpld
-
- reg:
- description:
- I2C device address.
- maxItems: 1
-
- "#address-cells":
- const: 1
-
- "#size-cells":
- const: 0
-
-required:
- - compatible
- - reg
- - "#address-cells"
- - "#size-cells"
-
-patternProperties:
- "^gpio(@[0-9a-f]+)?$":
- $ref: /schemas/gpio/delta,tn48m-gpio.yaml
-
- "^reset-controller?$":
- $ref: /schemas/reset/delta,tn48m-reset.yaml
-
-additionalProperties: false
-
-examples:
- - |
- i2c {
- #address-cells = <1>;
- #size-cells = <0>;
-
- cpld@41 {
- compatible = "delta,tn48m-cpld";
- reg = <0x41>;
- #address-cells = <1>;
- #size-cells = <0>;
-
- gpio@31 {
- compatible = "delta,tn48m-gpo";
- reg = <0x31>;
- gpio-controller;
- #gpio-cells = <2>;
- };
-
- gpio@3a {
- compatible = "delta,tn48m-gpi";
- reg = <0x3a>;
- gpio-controller;
- #gpio-cells = <2>;
- };
-
- gpio@40 {
- compatible = "delta,tn48m-gpi";
- reg = <0x40>;
- gpio-controller;
- #gpio-cells = <2>;
- };
-
- reset-controller {
- compatible = "delta,tn48m-reset";
- #reset-cells = <1>;
- };
- };
- };
diff --git a/MAINTAINERS b/MAINTAINERS
index 765ad2daa218..7d3c0d2375c8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7107,15 +7107,6 @@ S: Maintained
F: Documentation/hwmon/dps920ab.rst
F: drivers/hwmon/pmbus/dps920ab.c
-DELTA NETWORKS TN48M CPLD DRIVERS
-M: Robert Marko <robert.marko@...tura.hr>
-S: Maintained
-F: Documentation/devicetree/bindings/gpio/delta,tn48m-gpio.yaml
-F: Documentation/devicetree/bindings/mfd/delta,tn48m-cpld.yaml
-F: Documentation/devicetree/bindings/reset/delta,tn48m-reset.yaml
-F: drivers/gpio/gpio-tn48m.c
-F: include/dt-bindings/reset/delta,tn48m-reset.h
-
DELTA ST MEDIA DRIVER
M: Hugues Fruchet <hugues.fruchet@...s.st.com>
L: linux-media@...r.kernel.org
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index bd185482a7fd..d1d3f98b87f6 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -1619,18 +1619,6 @@ config GPIO_TIMBERDALE
help
Add support for the GPIO IP in the timberdale FPGA.
-config GPIO_TN48M_CPLD
- tristate "Delta Networks TN48M switch CPLD GPIO driver"
- depends on MFD_TN48M_CPLD || COMPILE_TEST
- select GPIO_REGMAP
- help
- This enables support for the GPIOs found on the Delta
- Networks TN48M switch Lattice CPLD. It provides 12 pins in total,
- they are input-only or output-only type.
-
- This driver can also be built as a module. If so, the
- module will be called gpio-tn48m.
-
config GPIO_TPS65086
tristate "TI TPS65086 GPO"
depends on MFD_TPS65086
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 2421a8fd3733..c3ee30133c24 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -181,7 +181,6 @@ obj-$(CONFIG_GPIO_TEGRA186) += gpio-tegra186.o
obj-$(CONFIG_GPIO_TEGRA) += gpio-tegra.o
obj-$(CONFIG_GPIO_THUNDERX) += gpio-thunderx.o
obj-$(CONFIG_GPIO_TIMBERDALE) += gpio-timberdale.o
-obj-$(CONFIG_GPIO_TN48M_CPLD) += gpio-tn48m.o
obj-$(CONFIG_GPIO_TPIC2810) += gpio-tpic2810.o
obj-$(CONFIG_GPIO_TPS65086) += gpio-tps65086.o
obj-$(CONFIG_GPIO_TPS65218) += gpio-tps65218.o
diff --git a/drivers/gpio/gpio-tn48m.c b/drivers/gpio/gpio-tn48m.c
deleted file mode 100644
index cd4a80b22794..000000000000
--- a/drivers/gpio/gpio-tn48m.c
+++ /dev/null
@@ -1,100 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Delta TN48M CPLD GPIO driver
- *
- * Copyright (C) 2021 Sartura Ltd.
- *
- * Author: Robert Marko <robert.marko@...tura.hr>
- */
-
-#include <linux/device.h>
-#include <linux/gpio/driver.h>
-#include <linux/gpio/regmap.h>
-#include <linux/mod_devicetable.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/regmap.h>
-
-enum tn48m_gpio_type {
- TN48M_GP0 = 1,
- TN48M_GPI,
-};
-
-struct tn48m_gpio_config {
- int ngpio;
- int ngpio_per_reg;
- enum tn48m_gpio_type type;
-};
-
-static const struct tn48m_gpio_config tn48m_gpo_config = {
- .ngpio = 4,
- .ngpio_per_reg = 4,
- .type = TN48M_GP0,
-};
-
-static const struct tn48m_gpio_config tn48m_gpi_config = {
- .ngpio = 4,
- .ngpio_per_reg = 4,
- .type = TN48M_GPI,
-};
-
-static int tn48m_gpio_probe(struct platform_device *pdev)
-{
- const struct tn48m_gpio_config *gpio_config;
- struct gpio_regmap_config config = {};
- struct regmap *regmap;
- u32 base;
- int ret;
-
- if (!pdev->dev.parent)
- return -ENODEV;
-
- gpio_config = device_get_match_data(&pdev->dev);
- if (!gpio_config)
- return -ENODEV;
-
- ret = device_property_read_u32(&pdev->dev, "reg", &base);
- if (ret)
- return ret;
-
- regmap = dev_get_regmap(pdev->dev.parent, NULL);
- if (!regmap)
- return -ENODEV;
-
- config.regmap = regmap;
- config.parent = &pdev->dev;
- config.ngpio = gpio_config->ngpio;
- config.ngpio_per_reg = gpio_config->ngpio_per_reg;
- switch (gpio_config->type) {
- case TN48M_GP0:
- config.reg_set_base = base;
- break;
- case TN48M_GPI:
- config.reg_dat_base = base;
- break;
- default:
- return -EINVAL;
- }
-
- return PTR_ERR_OR_ZERO(devm_gpio_regmap_register(&pdev->dev, &config));
-}
-
-static const struct of_device_id tn48m_gpio_of_match[] = {
- { .compatible = "delta,tn48m-gpo", .data = &tn48m_gpo_config },
- { .compatible = "delta,tn48m-gpi", .data = &tn48m_gpi_config },
- { }
-};
-MODULE_DEVICE_TABLE(of, tn48m_gpio_of_match);
-
-static struct platform_driver tn48m_gpio_driver = {
- .driver = {
- .name = "delta-tn48m-gpio",
- .of_match_table = tn48m_gpio_of_match,
- },
- .probe = tn48m_gpio_probe,
-};
-module_platform_driver(tn48m_gpio_driver);
-
-MODULE_AUTHOR("Robert Marko <robert.marko@...tura.hr>");
-MODULE_DESCRIPTION("Delta TN48M CPLD GPIO driver");
-MODULE_LICENSE("GPL");
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