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Message-ID: <20240813082735.52402-1-brgl@bgdev.pl>
Date: Tue, 13 Aug 2024 10:27:35 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Russell King <linux@...linux.org.uk>
Cc: linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org,
Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH] ARM: davinci: remove unused cpuidle code
From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
The cpuidle driver in mach-davinci is no longer used by anyone.
Remove it.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
arch/arm/mach-davinci/Makefile | 1 -
arch/arm/mach-davinci/cpuidle.c | 99 ---------------------------
arch/arm/mach-davinci/cpuidle.h | 15 ----
arch/arm/mach-davinci/devices-da8xx.c | 1 -
4 files changed, 116 deletions(-)
delete mode 100644 arch/arm/mach-davinci/cpuidle.c
delete mode 100644 arch/arm/mach-davinci/cpuidle.h
diff --git a/arch/arm/mach-davinci/Makefile b/arch/arm/mach-davinci/Makefile
index 450883ea0e73..31d22a5d8e1e 100644
--- a/arch/arm/mach-davinci/Makefile
+++ b/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
diff --git a/arch/arm/mach-davinci/cpuidle.c b/arch/arm/mach-davinci/cpuidle.c
deleted file mode 100644
index 78a1575c387d..000000000000
--- a/arch/arm/mach-davinci/cpuidle.c
+++ /dev/null
@@ -1,99 +0,0 @@
-// 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);
-
diff --git a/arch/arm/mach-davinci/cpuidle.h b/arch/arm/mach-davinci/cpuidle.h
deleted file mode 100644
index 976d43073597..000000000000
--- a/arch/arm/mach-davinci/cpuidle.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/* 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
diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c
index 6939166c33c2..5e73a725d5da 100644
--- a/arch/arm/mach-davinci/devices-da8xx.c
+++ b/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"
--
2.43.0
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