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cns3xxx: add back watchdog support

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Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2017-02-11 14:26:36 +01:00
parent 0799de6d9e
commit 73ea3c3f9c
4 changed files with 151 additions and 69 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
target/linux/cns3xxx/config-4.9
View File

@ -1,5 +1,4 @@
CONFIG_ALIGNMENT_TRAP=y
# CONFIG_ARCH_ASPEED is not set
CONFIG_ARCH_CLOCKSOURCE_DATA=y
CONFIG_ARCH_CNS3XXX=y
CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
@ -14,7 +13,6 @@ CONFIG_ARCH_MULTIPLATFORM=y
CONFIG_ARCH_MULTI_V6=y
CONFIG_ARCH_MULTI_V6_V7=y
CONFIG_ARCH_NR_GPIO=0
# CONFIG_ARCH_OMAP2 is not set
# CONFIG_ARCH_SELECT_MEMORY_MODEL is not set
# CONFIG_ARCH_SPARSEMEM_DEFAULT is not set
CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y
@ -24,7 +22,6 @@ CONFIG_ARCH_USE_BUILTIN_BSWAP=y
CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y
CONFIG_ARCH_WANT_GENERAL_HUGETLB=y
CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
# CONFIG_ARCH_WM8750 is not set
CONFIG_ARM=y
# CONFIG_ARM_CPU_SUSPEND is not set
CONFIG_ARM_GIC=y
@ -86,7 +83,6 @@ CONFIG_DTC=y
CONFIG_EDAC_ATOMIC_SCRUB=y
CONFIG_EDAC_SUPPORT=y
CONFIG_EEPROM_AT24=y
# CONFIG_EFI is not set
CONFIG_FIQ=y
CONFIG_FIXED_PHY=y
CONFIG_FIX_EARLYCON_MEM=y
@ -109,7 +105,6 @@ CONFIG_GENERIC_STRNLEN_USER=y
CONFIG_GLOB=y
CONFIG_GPIOLIB=y
CONFIG_GPIOLIB_IRQCHIP=y
# CONFIG_GPIO_MPC8XXX is not set
CONFIG_GPIO_PCA953X=y
CONFIG_GPIO_PCA953X_IRQ=y
CONFIG_GPIO_SYSFS=y
@ -160,7 +155,6 @@ CONFIG_HAVE_SMP=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_HAVE_UID16=y
CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
# CONFIG_HISI_FEMAC is not set
CONFIG_HWMON=y
CONFIG_HZ_FIXED=0
CONFIG_HZ_PERIODIC=y
@ -175,7 +169,6 @@ CONFIG_IRQ_DOMAIN=y
CONFIG_IRQ_DOMAIN_HIERARCHY=y
CONFIG_IRQ_FORCED_THREADING=y
CONFIG_IRQ_WORK=y
CONFIG_LCD_DOGM132=y
CONFIG_LEDS_GPIO=y
# CONFIG_LEDS_TRIGGER_MTD is not set
# CONFIG_LEDS_TRIGGER_NETDEV is not set
@ -186,8 +179,6 @@ CONFIG_LZO_DECOMPRESS=y
# CONFIG_MACH_CNS3420VB is not set
CONFIG_MACH_GW2388=y
CONFIG_MDIO_BOARDINFO=y
# CONFIG_MDIO_HISI_FEMAC is not set
# CONFIG_MFD_ACT8945A is not set
# CONFIG_MFD_MAX77620 is not set
CONFIG_MIGHT_HAVE_CACHE_L2X0=y
CONFIG_MIGHT_HAVE_PCI=y
@ -199,6 +190,7 @@ CONFIG_MMC_SDHCI_CNS3XXX=y
CONFIG_MMC_SDHCI_PLTFM=y
# CONFIG_MMC_TIFM_SD is not set
CONFIG_MODULES_USE_ELF_REL=y
CONFIG_MPCORE_WATCHDOG=y
CONFIG_MTD_M25P80=y
# CONFIG_MTD_OF_PARTS is not set
CONFIG_MTD_PHYSMAP=y
@ -246,8 +238,6 @@ CONFIG_PL310_ERRATA_753970=y
CONFIG_PL310_ERRATA_769419=y
CONFIG_PPS=y
CONFIG_PPS_CLIENT_GPIO=y
CONFIG_PWRSEQ_EMMC=y
CONFIG_PWRSEQ_SIMPLE=y
CONFIG_RAID_ATTRS=y
CONFIG_RATIONAL=y
CONFIG_RCU_STALL_COMMON=y
@ -308,6 +298,7 @@ CONFIG_USB_SUPPORT=y
CONFIG_USE_OF=y
CONFIG_VECTORS_BASE=0xffff0000
CONFIG_VFP=y
CONFIG_WATCHDOG_CORE=y
CONFIG_WATCHDOG_NOWAYOUT=y
CONFIG_XPS=y
CONFIG_XZ_DEC_ARM=y

197
target/linux/cns3xxx/patches-4.9/020-watchdog_support.patch
View File

@ -1,59 +1,150 @@
1. Made the connection between CNS3xxx SOCs(ARCH_CNS3xxx) and MPcore watchdog
since the CNS3xxx SOCs have ARM11 MPcore CPU.
2. Enable mpcore_watchdog option as module to default configuration at
arch/arm/configs/cns3420vb_defconfig.
Signed-off-by: Tommy Lin <tommy.lin@caviumnetworks.com>
Add a watchdog driver for ARM MPcore processors.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
arch/arm/Kconfig | 1 +
arch/arm/configs/cns3420vb_defconfig | 2 ++
arch/arm/mach-cns3xxx/cns3420vb.c | 22 ++++++++++++++++++++++
3 files changed, 25 insertions(+), 0 deletions(-)
--- a/arch/arm/configs/cns3420vb_defconfig
+++ b/arch/arm/configs/cns3420vb_defconfig
@@ -56,6 +56,8 @@ CONFIG_LEGACY_PTY_COUNT=16
# CONFIG_HW_RANDOM is not set
# CONFIG_HWMON is not set
# CONFIG_VGA_CONSOLE is not set
+CONFIG_WATCHDOG=y
+CONFIG_MPCORE_WATCHDOG=m
# CONFIG_HID_SUPPORT is not set
# CONFIG_USB_SUPPORT is not set
CONFIG_MMC=y
--- a/arch/arm/mach-cns3xxx/cns3420vb.c
+++ b/arch/arm/mach-cns3xxx/cns3420vb.c
@@ -206,10 +206,32 @@ static struct platform_device cns3xxx_us
},
};
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -324,6 +324,13 @@ config KS8695_WATCHDOG
Watchdog timer embedded into KS8695 processor. This will reboot your
system when the timeout is reached.
+/* Watchdog */
+static struct resource cns3xxx_watchdog_resources[] = {
+ [0] = {
+ .start = CNS3XXX_TC11MP_TWD_BASE,
+ .end = CNS3XXX_TC11MP_TWD_BASE + PAGE_SIZE - 1,
+ .flags = IORESOURCE_MEM,
+config MPCORE_WATCHDOG
+ tristate "MPcore watchdog"
+ depends on HAVE_ARM_TWD
+ select WATCHDOG_CORE
+ help
+ Watchdog timer embedded into the MPcore system
+
config HAVE_S3C2410_WATCHDOG
bool
help
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -47,6 +47,7 @@ obj-$(CONFIG_21285_WATCHDOG) += wdt285.o
obj-$(CONFIG_977_WATCHDOG) += wdt977.o
obj-$(CONFIG_IXP4XX_WATCHDOG) += ixp4xx_wdt.o
obj-$(CONFIG_KS8695_WATCHDOG) += ks8695_wdt.o
+obj-$(CONFIG_MPCORE_WATCHDOG) += mpcore_wdt.o
obj-$(CONFIG_S3C2410_WATCHDOG) += s3c2410_wdt.o
obj-$(CONFIG_SA1100_WATCHDOG) += sa1100_wdt.o
obj-$(CONFIG_SAMA5D4_WATCHDOG) += sama5d4_wdt.o
--- /dev/null
+++ b/drivers/watchdog/mpcore_wdt.c
@@ -0,0 +1,117 @@
+/*
+ * Watchdog driver for ARM MPcore
+ *
+ * Copyright (C) 2017 Felix Fietkau <nbd@nbd.name>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/watchdog.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <asm/smp_twd.h>
+
+static void __iomem *wdt_base;
+static int wdt_timeout = 60;
+
+static int mpcore_wdt_keepalive(struct watchdog_device *wdd)
+{
+ static int perturb;
+ u32 count;
+
+ count = ioread32(wdt_base + TWD_WDOG_COUNTER);
+ count = (~0U - count) * HZ / 5;
+ count /= 256; /* prescale */
+ count *= wdt_timeout;
+
+ /* Reload register needs a different value on each refresh */
+ count += perturb;
+ perturb = !perturb;
+
+ iowrite32(count, wdt_base + TWD_WDOG_LOAD);
+
+ return 0;
+}
+
+static int mpcore_wdt_start(struct watchdog_device *wdd)
+{
+ mpcore_wdt_keepalive(wdd);
+
+ /* prescale = 256, mode = 1, enable = 1 */
+ iowrite32(0x0000FF09, wdt_base + TWD_WDOG_CONTROL);
+
+ return 0;
+}
+
+static int mpcore_wdt_stop(struct watchdog_device *wdd)
+{
+ iowrite32(0x12345678, wdt_base + TWD_WDOG_DISABLE);
+ iowrite32(0x87654321, wdt_base + TWD_WDOG_DISABLE);
+ iowrite32(0x0, wdt_base + TWD_WDOG_CONTROL);
+
+ return 0;
+}
+
+static int mpcore_wdt_set_timeout(struct watchdog_device *wdd,
+ unsigned int timeout)
+{
+ mpcore_wdt_stop(wdd);
+ wdt_timeout = timeout;
+ mpcore_wdt_start(wdd);
+
+ return 0;
+}
+
+static const struct watchdog_info mpcore_wdt_info = {
+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
+ .identity = "MPcore Watchdog",
+};
+
+static const struct watchdog_ops mpcore_wdt_ops = {
+ .owner = THIS_MODULE,
+ .start = mpcore_wdt_start,
+ .stop = mpcore_wdt_stop,
+ .ping = mpcore_wdt_keepalive,
+ .set_timeout = mpcore_wdt_set_timeout,
+};
+
+static struct watchdog_device mpcore_wdt = {
+ .info = &mpcore_wdt_info,
+ .ops = &mpcore_wdt_ops,
+ .min_timeout = 1,
+ .max_timeout = 65535,
+};
+
+static int mpcore_wdt_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENODEV;
+
+ wdt_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(wdt_base))
+ return PTR_ERR(wdt_base);
+
+ watchdog_register_device(&mpcore_wdt);
+ return 0;
+}
+
+static int mpcore_wdt_remove(struct platform_device *dev)
+{
+ watchdog_unregister_device(&mpcore_wdt);
+ return 0;
+}
+
+static struct platform_driver mpcore_wdt_driver = {
+ .probe = mpcore_wdt_probe,
+ .remove = mpcore_wdt_remove,
+ .driver = {
+ .name = "mpcore_wdt",
+ },
+ [1] = {
+ .start = IRQ_LOCALWDOG,
+ .end = IRQ_LOCALWDOG,
+ .flags = IORESOURCE_IRQ,
+ }
+};
+
+static struct platform_device cns3xxx_watchdog_device = {
+ .name = "mpcore_wdt",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(cns3xxx_watchdog_resources),
+ .resource = cns3xxx_watchdog_resources,
+};
+
/*
* Initialization
*/
static struct platform_device *cns3420_pdevs[] __initdata = {
+ &cns3xxx_watchdog_device,
&cns3420_nor_pdev,
&cns3xxx_usb_ehci_device,
&cns3xxx_usb_ohci_device,
+module_platform_driver(mpcore_wdt_driver);
+MODULE_AUTHOR("Felix Fietkau <nbd@nbd.name>");
+MODULE_LICENSE("GPL");

2
target/linux/cns3xxx/patches-4.9/095-gpio_support.patch
View File

@ -1,6 +1,6 @@
--- a/arch/arm/mach-cns3xxx/cns3420vb.c
+++ b/arch/arm/mach-cns3xxx/cns3420vb.c
@@ -245,6 +245,10 @@ static void __init cns3420_init(void)
@@ -223,6 +223,10 @@ static void __init cns3420_init(void)
cns3xxx_ahci_init();
cns3xxx_sdhci_init();

8
target/linux/cns3xxx/patches-4.9/097-l2x0_cmdline_disable.patch
View File

@ -8,15 +8,15 @@
+static int cns3xxx_l2x0_enable = 1;
+
+static int __init cns3xxx_l2x0_disable(char *s)
+{
{
- void __iomem *base = ioremap(CNS3XXX_L2C_BASE, SZ_4K);
+ cns3xxx_l2x0_enable = 0;
+ return 1;
+}
+__setup("nol2x0", cns3xxx_l2x0_disable);
+
+static int __init cns3xxx_l2x0_init(void)
{
- void __iomem *base = ioremap(CNS3XXX_L2C_BASE, SZ_4K);
+{
+ void __iomem *base;
u32 val;
@ -43,7 +43,7 @@
--- a/arch/arm/mach-cns3xxx/cns3420vb.c
+++ b/arch/arm/mach-cns3xxx/cns3420vb.c
@@ -239,8 +239,6 @@ static struct platform_device *cns3420_p
@@ -217,8 +217,6 @@ static struct platform_device *cns3420_p
static void __init cns3420_init(void)
{