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-rw-r--r--arch/arm/mach-ixp4xx/Kconfig14
-rw-r--r--arch/arm/mach-ixp4xx/Makefile3
-rw-r--r--arch/arm/mach-ixp4xx/ixp4xx-of.c60
-rw-r--r--arch/arm/mach-ixp4xx/ixp4xx_npe.c5
-rw-r--r--arch/arm/mach-ixp4xx/ixp4xx_qmgr.c5
-rw-r--r--drivers/net/ethernet/xscale/ixp4xx_eth.c10
-rw-r--r--drivers/watchdog/ixp4xx_wdt.c9
7 files changed, 106 insertions, 0 deletions
diff --git a/arch/arm/mach-ixp4xx/Kconfig b/arch/arm/mach-ixp4xx/Kconfig
index fea008123eb1..0973270f4863 100644
--- a/arch/arm/mach-ixp4xx/Kconfig
+++ b/arch/arm/mach-ixp4xx/Kconfig
@@ -4,6 +4,20 @@ menu "Intel IXP4xx Implementation Options"
comment "IXP4xx Platforms"
+config MACH_IXP4XX_OF
+ bool
+ prompt "Devce Tree IXP4xx boards"
+ default y
+ select ARM_APPENDED_DTB # Old Redboot bootloaders deployed
+ select I2C
+ select I2C_IOP3XX
+ select PCI
+ select SERIAL_OF_PLATFORM
+ select TIMER_OF
+ select USE_OF
+ help
+ Say 'Y' here to support Device Tree-based IXP4xx platforms.
+
config MACH_NSLU2
bool
prompt "Linksys NSLU2"
diff --git a/arch/arm/mach-ixp4xx/Makefile b/arch/arm/mach-ixp4xx/Makefile
index f09994500a34..5f63b3012826 100644
--- a/arch/arm/mach-ixp4xx/Makefile
+++ b/arch/arm/mach-ixp4xx/Makefile
@@ -6,6 +6,9 @@
obj-pci-y :=
obj-pci-n :=
+# Device tree platform
+obj-pci-$(CONFIG_MACH_IXP4XX_OF) += ixp4xx-of.o
+
obj-pci-$(CONFIG_ARCH_IXDP4XX) += ixdp425-pci.o
obj-pci-$(CONFIG_MACH_AVILA) += avila-pci.o
obj-pci-$(CONFIG_MACH_IXDPG425) += ixdpg425-pci.o
diff --git a/arch/arm/mach-ixp4xx/ixp4xx-of.c b/arch/arm/mach-ixp4xx/ixp4xx-of.c
new file mode 100644
index 000000000000..7449b8319c8a
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/ixp4xx-of.c
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * IXP4xx Device Tree boot support
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+
+#include <mach/hardware.h>
+#include <mach/ixp4xx-regs.h>
+
+static struct map_desc ixp4xx_of_io_desc[] __initdata = {
+ /*
+ * This is needed for runtime system configuration checks,
+ * such as reading if hardware so-and-so is present. This
+ * could eventually be converted into a syscon once all boards
+ * are converted to device tree.
+ */
+ {
+ .virtual = IXP4XX_EXP_CFG_BASE_VIRT,
+ .pfn = __phys_to_pfn(IXP4XX_EXP_CFG_BASE_PHYS),
+ .length = SZ_4K,
+ .type = MT_DEVICE,
+ },
+#ifdef CONFIG_DEBUG_UART_8250
+ /* This is needed for LL-debug/earlyprintk/debug-macro.S */
+ {
+ .virtual = CONFIG_DEBUG_UART_VIRT,
+ .pfn = __phys_to_pfn(CONFIG_DEBUG_UART_PHYS),
+ .length = SZ_4K,
+ .type = MT_DEVICE,
+ },
+#endif
+};
+
+static void __init ixp4xx_of_map_io(void)
+{
+ iotable_init(ixp4xx_of_io_desc, ARRAY_SIZE(ixp4xx_of_io_desc));
+}
+
+/*
+ * We handle 4 differen SoC families. These compatible strings are enough
+ * to provide the core so that different boards can add their more detailed
+ * specifics.
+ */
+static const char *ixp4xx_of_board_compat[] = {
+ "intel,ixp42x",
+ "intel,ixp43x",
+ "intel,ixp45x",
+ "intel,ixp46x",
+ NULL,
+};
+
+DT_MACHINE_START(IXP4XX_DT, "IXP4xx (Device Tree)")
+ .map_io = ixp4xx_of_map_io,
+ .dt_compat = ixp4xx_of_board_compat,
+MACHINE_END
diff --git a/arch/arm/mach-ixp4xx/ixp4xx_npe.c b/arch/arm/mach-ixp4xx/ixp4xx_npe.c
index d4eb09a62863..e0ce22cd9bfc 100644
--- a/arch/arm/mach-ixp4xx/ixp4xx_npe.c
+++ b/arch/arm/mach-ixp4xx/ixp4xx_npe.c
@@ -20,6 +20,7 @@
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/of.h>
#include <mach/npe.h>
#define DEBUG_MSG 0
@@ -688,6 +689,10 @@ static int __init npe_init_module(void)
int i, found = 0;
+ /* This driver does not work with device tree */
+ if (of_have_populated_dt())
+ return -ENODEV;
+
for (i = 0; i < NPE_COUNT; i++) {
struct npe *npe = &npe_tab[i];
if (!(ixp4xx_read_feature_bits() &
diff --git a/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c b/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
index 4c7c960e1b4c..2665347a2c6f 100644
--- a/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
+++ b/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
@@ -12,6 +12,7 @@
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/of.h>
#include <mach/qmgr.h>
#include "irqs.h"
@@ -289,6 +290,10 @@ static int qmgr_init(void)
int i, err;
irq_handler_t handler1, handler2;
+ /* This driver does not work with device tree */
+ if (of_have_populated_dt())
+ return -ENODEV;
+
mem_res = request_mem_region(IXP4XX_QMGR_BASE_PHYS,
IXP4XX_QMGR_REGION_SIZE,
"IXP4xx Queue Manager");
diff --git a/drivers/net/ethernet/xscale/ixp4xx_eth.c b/drivers/net/ethernet/xscale/ixp4xx_eth.c
index ed6623a9801e..05d27fa9835f 100644
--- a/drivers/net/ethernet/xscale/ixp4xx_eth.c
+++ b/drivers/net/ethernet/xscale/ixp4xx_eth.c
@@ -31,6 +31,7 @@
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/net_tstamp.h>
+#include <linux/of.h>
#include <linux/phy.h>
#include <linux/platform_device.h>
#include <linux/ptp_classify.h>
@@ -1497,6 +1498,15 @@ static struct platform_driver ixp4xx_eth_driver = {
static int __init eth_init_module(void)
{
int err;
+
+ /*
+ * FIXME: we bail out on device tree boot but this really needs
+ * to be fixed in a nicer way: this registers the MDIO bus before
+ * even matching the driver infrastructure, we should only probe
+ * detected hardware.
+ */
+ if (of_have_populated_dt())
+ return -ENODEV;
if ((err = ixp4xx_mdio_register()))
return err;
return platform_driver_register(&ixp4xx_eth_driver);
diff --git a/drivers/watchdog/ixp4xx_wdt.c b/drivers/watchdog/ixp4xx_wdt.c
index f20cc53ff719..a80449bb36f0 100644
--- a/drivers/watchdog/ixp4xx_wdt.c
+++ b/drivers/watchdog/ixp4xx_wdt.c
@@ -21,6 +21,7 @@
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/miscdevice.h>
+#include <linux/of.h>
#include <linux/watchdog.h>
#include <linux/init.h>
#include <linux/bitops.h>
@@ -176,6 +177,14 @@ static int __init ixp4xx_wdt_init(void)
{
int ret;
+ /*
+ * FIXME: we bail out on device tree boot but this really needs
+ * to be fixed in a nicer way: this registers the MDIO bus before
+ * even matching the driver infrastructure, we should only probe
+ * detected hardware.
+ */
+ if (of_have_populated_dt())
+ return -ENODEV;
if (!(read_cpuid_id() & 0xf) && !cpu_is_ixp46x()) {
pr_err("Rev. A0 IXP42x CPU detected - watchdog disabled\n");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 19:47:02 +0000