ARM: davinci: remove unused cpuidle code

The cpuidle driver in mach-davinci is no longer used by anyone.
Remove it.

Link: https://lore.kernel.org/r/20240813082735.52402-1-brgl@bgdev.plSigned-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

arch/arm/mach-davinci/Makefile

@@ -16,7 +16,6 @@ obj-$(CONFIG_ARCH_DAVINCI_DA850)	+= da850.o pdata-quirks.o
 obj-y					+= da8xx-dt.o
 
 # Power Management
-obj-$(CONFIG_CPU_IDLE)			+= cpuidle.o
 obj-$(CONFIG_HAVE_CLK)			+= pm_domain.o
 ifeq ($(CONFIG_SUSPEND),y)
 obj-$(CONFIG_ARCH_DAVINCI_DA850)	+= pm.o sleep.o

arch/arm/mach-davinci/cpuidle.c

-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * CPU idle for DaVinci SoCs
- *
- * Copyright (C) 2009 Texas Instruments Incorporated. https://www.ti.com/
- *
- * Derived from Marvell Kirkwood CPU idle code
- * (arch/arm/mach-kirkwood/cpuidle.c)
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/cpuidle.h>
-#include <linux/io.h>
-#include <linux/export.h>
-#include <asm/cpuidle.h>
-
-#include "cpuidle.h"
-#include "ddr2.h"
-
-#define DAVINCI_CPUIDLE_MAX_STATES	2
-
-static void __iomem *ddr2_reg_base;
-static bool ddr2_pdown;
-
-static void davinci_save_ddr_power(int enter, bool pdown)
-{
-	u32 val;
-
-	val = __raw_readl(ddr2_reg_base + DDR2_SDRCR_OFFSET);
-
-	if (enter) {
-		if (pdown)
-			val |= DDR2_SRPD_BIT;
-		else
-			val &= ~DDR2_SRPD_BIT;
-		val |= DDR2_LPMODEN_BIT;
-	} else {
-		val &= ~(DDR2_SRPD_BIT | DDR2_LPMODEN_BIT);
-	}
-
-	__raw_writel(val, ddr2_reg_base + DDR2_SDRCR_OFFSET);
-}
-
-/* Actual code that puts the SoC in different idle states */
-static __cpuidle int davinci_enter_idle(struct cpuidle_device *dev,
-					struct cpuidle_driver *drv, int index)
-{
-	davinci_save_ddr_power(1, ddr2_pdown);
-	cpu_do_idle();
-	davinci_save_ddr_power(0, ddr2_pdown);
-
-	return index;
-}
-
-static struct cpuidle_driver davinci_idle_driver = {
-	.name			= "cpuidle-davinci",
-	.owner			= THIS_MODULE,
-	.states[0]		= ARM_CPUIDLE_WFI_STATE,
-	.states[1]		= {
-		.enter			= davinci_enter_idle,
-		.exit_latency		= 10,
-		.target_residency	= 10000,
-		.name			= "DDR SR",
-		.desc			= "WFI and DDR Self Refresh",
-	},
-	.state_count = DAVINCI_CPUIDLE_MAX_STATES,
-};
-
-static int __init davinci_cpuidle_probe(struct platform_device *pdev)
-{
-	struct davinci_cpuidle_config *pdata = pdev->dev.platform_data;
-
-	if (!pdata) {
-		dev_err(&pdev->dev, "cannot get platform data\n");
-		return -ENOENT;
-	}
-
-	ddr2_reg_base = pdata->ddr2_ctlr_base;
-
-	ddr2_pdown = pdata->ddr2_pdown;
-
-	return cpuidle_register(&davinci_idle_driver, NULL);
-}
-
-static struct platform_driver davinci_cpuidle_driver = {
-	.driver = {
-		.name	= "cpuidle-davinci",
-	},
-};
-
-static int __init davinci_cpuidle_init(void)
-{
-	return platform_driver_probe(&davinci_cpuidle_driver,
-						davinci_cpuidle_probe);
-}
-device_initcall(davinci_cpuidle_init);
-

arch/arm/mach-davinci/cpuidle.h

-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * TI DaVinci cpuidle platform support
- *
- * 2009 (C) Texas Instruments, Inc. https://www.ti.com/
- */
-#ifndef _MACH_DAVINCI_CPUIDLE_H
-#define _MACH_DAVINCI_CPUIDLE_H
-
-struct davinci_cpuidle_config {
-	u32 ddr2_pdown;
-	void __iomem *ddr2_ctlr_base;
-};
-
-#endif

arch/arm/mach-davinci/devices-da8xx.c

@@ -21,7 +21,6 @@
 #include "common.h"
 #include "cputype.h"
 #include "da8xx.h"
-#include "cpuidle.h"
 #include "irqs.h"
 #include "sram.h"