media: rc: remove zte zx ir driver

The zte zx platform is getting removed, so this driver is no
longer needed.

Cc: Jun Nie <jun.nie@linaro.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Documentation/devicetree/bindings/media/zx-irdec.txt

-IR Decoder (IRDEC) on ZTE ZX family SoCs
-
-Required properties:
- - compatible: Should be "zte,zx296718-irdec".
- - reg: Physical base address and length of IRDEC registers.
- - interrupts: Interrupt number of IRDEC.
-
-Exmaples:
-
-	irdec: ir-decoder@111000 {
-		compatible = "zte,zx296718-irdec";
-		reg = <0x111000 0x1000>;
-		interrupts = <GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>;
-	};

drivers/media/rc/Kconfig

@@ -521,17 +521,6 @@ config RC_XBOX_DVD
 	   To compile this driver as a module, choose M here: the module will be
 	   called xbox_remote.
 
-config IR_ZX
-	tristate "ZTE ZX IR remote control"
-	depends on RC_CORE
-	depends on ARCH_ZX || COMPILE_TEST
-	help
-	   Say Y if you want to use the IR remote control available
-	   on ZTE ZX family SoCs.
-
-	   To compile this driver as a module, choose M here: the
-	   module will be called zx-irdec.
-
 config IR_TOY
 	tristate "Infrared Toy and IR Droid"
 	depends on RC_CORE

drivers/media/rc/Makefile

@@ -47,7 +47,6 @@ obj-$(CONFIG_IR_IMG) += img-ir/
 obj-$(CONFIG_IR_SERIAL) += serial_ir.o
 obj-$(CONFIG_IR_SIR) += sir_ir.o
 obj-$(CONFIG_IR_MTK) += mtk-cir.o
-obj-$(CONFIG_IR_ZX) += zx-irdec.o
 obj-$(CONFIG_IR_TANGO) += tango-ir.o
 obj-$(CONFIG_RC_XBOX_DVD) += xbox_remote.o
 obj-$(CONFIG_IR_TOY) += ir_toy.o

drivers/media/rc/zx-irdec.c

-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (C) 2017 Sanechips Technology Co., Ltd.
- * Copyright 2017 Linaro Ltd.
- */
-
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/of_platform.h>
-#include <linux/platform_device.h>
-
-#include <media/rc-core.h>
-
-#define DRIVER_NAME		"zx-irdec"
-
-#define ZX_IR_ENABLE		0x04
-#define ZX_IREN			BIT(0)
-#define ZX_IR_CTRL		0x08
-#define ZX_DEGL_MASK		GENMASK(21, 20)
-#define ZX_DEGL_VALUE(x)	(((x) << 20) & ZX_DEGL_MASK)
-#define ZX_WDBEGIN_MASK		GENMASK(18, 8)
-#define ZX_WDBEGIN_VALUE(x)	(((x) << 8) & ZX_WDBEGIN_MASK)
-#define ZX_IR_INTEN		0x10
-#define ZX_IR_INTSTCLR		0x14
-#define ZX_IR_CODE		0x30
-#define ZX_IR_CNUM		0x34
-#define ZX_NECRPT		BIT(16)
-
-struct zx_irdec {
-	void __iomem *base;
-	struct rc_dev *rcd;
-};
-
-static void zx_irdec_set_mask(struct zx_irdec *irdec, unsigned int reg,
-			      u32 mask, u32 value)
-{
-	u32 data;
-
-	data = readl(irdec->base + reg);
-	data &= ~mask;
-	data |= value & mask;
-	writel(data, irdec->base + reg);
-}
-
-static irqreturn_t zx_irdec_irq(int irq, void *dev_id)
-{
-	struct zx_irdec *irdec = dev_id;
-	u8 address, not_address;
-	u8 command, not_command;
-	u32 rawcode, scancode;
-	enum rc_proto rc_proto;
-
-	/* Clear interrupt */
-	writel(1, irdec->base + ZX_IR_INTSTCLR);
-
-	/* Check repeat frame */
-	if (readl(irdec->base + ZX_IR_CNUM) & ZX_NECRPT) {
-		rc_repeat(irdec->rcd);
-		goto done;
-	}
-
-	rawcode = readl(irdec->base + ZX_IR_CODE);
-	not_command = (rawcode >> 24) & 0xff;
-	command = (rawcode >> 16) & 0xff;
-	not_address = (rawcode >> 8) & 0xff;
-	address = rawcode & 0xff;
-
-	scancode = ir_nec_bytes_to_scancode(address, not_address,
-					    command, not_command,
-					    &rc_proto);
-	rc_keydown(irdec->rcd, rc_proto, scancode, 0);
-
-done:
-	return IRQ_HANDLED;
-}
-
-static int zx_irdec_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct zx_irdec *irdec;
-	struct resource *res;
-	struct rc_dev *rcd;
-	int irq;
-	int ret;
-
-	irdec = devm_kzalloc(dev, sizeof(*irdec), GFP_KERNEL);
-	if (!irdec)
-		return -ENOMEM;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	irdec->base = devm_ioremap_resource(dev, res);
-	if (IS_ERR(irdec->base))
-		return PTR_ERR(irdec->base);
-
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0)
-		return irq;
-
-	rcd = devm_rc_allocate_device(dev, RC_DRIVER_SCANCODE);
-	if (!rcd) {
-		dev_err(dev, "failed to allocate rc device\n");
-		return -ENOMEM;
-	}
-
-	irdec->rcd = rcd;
-
-	rcd->priv = irdec;
-	rcd->input_phys = DRIVER_NAME "/input0";
-	rcd->input_id.bustype = BUS_HOST;
-	rcd->map_name = RC_MAP_ZX_IRDEC;
-	rcd->allowed_protocols = RC_PROTO_BIT_NEC | RC_PROTO_BIT_NECX |
-							RC_PROTO_BIT_NEC32;
-	rcd->driver_name = DRIVER_NAME;
-	rcd->device_name = DRIVER_NAME;
-
-	platform_set_drvdata(pdev, irdec);
-
-	ret = devm_rc_register_device(dev, rcd);
-	if (ret) {
-		dev_err(dev, "failed to register rc device\n");
-		return ret;
-	}
-
-	ret = devm_request_irq(dev, irq, zx_irdec_irq, 0, NULL, irdec);
-	if (ret) {
-		dev_err(dev, "failed to request irq\n");
-		return ret;
-	}
-
-	/*
-	 * Initialize deglitch level and watchdog counter beginner as
-	 * recommended by vendor BSP code.
-	 */
-	zx_irdec_set_mask(irdec, ZX_IR_CTRL, ZX_DEGL_MASK, ZX_DEGL_VALUE(0));
-	zx_irdec_set_mask(irdec, ZX_IR_CTRL, ZX_WDBEGIN_MASK,
-			  ZX_WDBEGIN_VALUE(0x21c));
-
-	/* Enable interrupt */
-	writel(1, irdec->base + ZX_IR_INTEN);
-
-	/* Enable the decoder */
-	zx_irdec_set_mask(irdec, ZX_IR_ENABLE, ZX_IREN, ZX_IREN);
-
-	return 0;
-}
-
-static int zx_irdec_remove(struct platform_device *pdev)
-{
-	struct zx_irdec *irdec = platform_get_drvdata(pdev);
-
-	/* Disable the decoder */
-	zx_irdec_set_mask(irdec, ZX_IR_ENABLE, ZX_IREN, 0);
-
-	/* Disable interrupt */
-	writel(0, irdec->base + ZX_IR_INTEN);
-
-	return 0;
-}
-
-static const struct of_device_id zx_irdec_match[] = {
-	{ .compatible = "zte,zx296718-irdec" },
-	{ },
-};
-MODULE_DEVICE_TABLE(of, zx_irdec_match);
-
-static struct platform_driver zx_irdec_driver = {
-	.probe = zx_irdec_probe,
-	.remove = zx_irdec_remove,
-	.driver = {
-		.name = DRIVER_NAME,
-		.of_match_table	= zx_irdec_match,
-	},
-};
-module_platform_driver(zx_irdec_driver);
-
-MODULE_DESCRIPTION("ZTE ZX IR remote control driver");
-MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
-MODULE_LICENSE("GPL v2");