watchdog: bcm2835_wdt: Remove unused BCM283x watchdog driver and its references

The BCM2835/2836 watchdog is not used in mainline U-Boot at all. This
patch removes the driver and its references (CONFIG_BCM2835_WDT)
completely.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Paolo Pisati <p.pisati@gmail.com>

diff --git a/arch/arm/mach-bcm283x/reset.c b/arch/arm/mach-bcm283x/reset.c
index 7712d46..b3da0c7 100644 (file)
--- a/arch/arm/mach-bcm283x/reset.c
+++ b/arch/arm/mach-bcm283x/reset.c
@@ -23,11 +23,7 @@
 /* max ticks timeout */
 #define BCM2835_WDOG_MAX_TIMEOUT       0x000fffff
 
-#ifdef CONFIG_BCM2835_WDT
-extern void hw_watchdog_disable(void);
-#else
 void hw_watchdog_disable(void) {}
-#endif
 
 __efi_runtime_data struct bcm2835_wdog_regs *wdog_regs =
        (struct bcm2835_wdog_regs *)BCM2835_WDOG_PHYSADDR;

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index ccda432..1e5d14c 100644 (file)
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -17,15 +17,6 @@ config WATCHDOG_RESET_DISABLE
           Disable reset watchdog, which can let WATCHDOG_RESET invalid, so
           that the watchdog will not be fed in u-boot.
 
-config BCM2835_WDT
-       bool "Enable BCM2835/2836 watchdog driver"
-       select HW_WATCHDOG
-       help
-         Say Y here to enable the BCM2835/2836 watchdog
-
-         This provides basic infrastructure to support BCM2835/2836 watchdog
-         hardware, with a max timeout of ~15secs.
-
 config IMX_WATCHDOG
        bool "Enable Watchdog Timer support for IMX and LSCH2 of NXP"
        select HW_WATCHDOG if !WDT

diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index 97aa6a8..414ba24 100644 (file)
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -20,7 +20,6 @@ obj-$(CONFIG_WDT_SANDBOX) += sandbox_wdt.o
 obj-$(CONFIG_WDT_ARMADA_37XX) += armada-37xx-wdt.o
 obj-$(CONFIG_WDT_ASPEED) += ast_wdt.o
 obj-$(CONFIG_WDT_BCM6345) += bcm6345_wdt.o
-obj-$(CONFIG_BCM2835_WDT)       += bcm2835_wdt.o
 obj-$(CONFIG_WDT_ORION) += orion_wdt.o
 obj-$(CONFIG_WDT_CDNS) += cdns_wdt.o
 obj-$(CONFIG_WDT_MPC8xx) += mpc8xx_wdt.o

diff --git a/drivers/watchdog/bcm2835_wdt.c b/drivers/watchdog/bcm2835_wdt.c
deleted file mode 100644 (file)
index 6cffcb1..0000000
--- a/drivers/watchdog/bcm2835_wdt.c
+++ /dev/null
@@ -1,34 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Watchdog driver for Broadcom BCM2835
- *
- * Copyright (C) 2017 Paolo Pisati <p.pisati@gmail.com>
- */
-
-#include <common.h>
-#include <efi_loader.h>
-#include <asm/io.h>
-#include <asm/arch/wdog.h>
-
-#define SECS_TO_WDOG_TICKS(x) ((x) << 16)
-#define MAX_TIMEOUT   0xf /* ~15s */
-
-static __efi_runtime_data bool enabled = true;
-
-extern void reset_cpu(ulong ticks);
-
-void hw_watchdog_reset(void)
-{
-       if (enabled)
-               reset_cpu(SECS_TO_WDOG_TICKS(MAX_TIMEOUT));
-}
-
-void hw_watchdog_init(void)
-{
-       hw_watchdog_reset();
-}
-
-void __efi_runtime hw_watchdog_disable(void)
-{
-       enabled = false;
-}