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author | Arnd Bergmann <arnd@arndb.de> | 2022-04-01 14:35:42 +0200 |
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committer | Arnd Bergmann <arnd@arndb.de> | 2022-04-04 10:22:37 +0200 |
commit | d7445676e86900f8dc363825033ff62416c216e0 (patch) | |
tree | e7f964467c325f4242e6cea29b5df46bbc889fea /arch/arm/mach-versatile/versatile_dt.c | |
parent | 3123109284176b1532874591f7c81f3837bbdc17 (diff) | |
download | lwn-d7445676e86900f8dc363825033ff62416c216e0.tar.gz lwn-d7445676e86900f8dc363825033ff62416c216e0.zip |
ARM: versatile: move integrator/realview/vexpress to versatile
These are all fairly small platforms by now, and they are
closely related. Just move them all into a single directory.
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/mach-versatile/versatile_dt.c')
-rw-r--r-- | arch/arm/mach-versatile/versatile_dt.c | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/arch/arm/mach-versatile/versatile_dt.c b/arch/arm/mach-versatile/versatile_dt.c deleted file mode 100644 index 02ba68abe533..000000000000 --- a/arch/arm/mach-versatile/versatile_dt.c +++ /dev/null @@ -1,185 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * Versatile board support using the device tree - * - * Copyright (C) 2010 Secret Lab Technologies Ltd. - * Copyright (C) 2009 Jeremy Kerr <jeremy.kerr@canonical.com> - * Copyright (C) 2004 ARM Limited - * Copyright (C) 2000 Deep Blue Solutions Ltd - */ - -#include <linux/init.h> -#include <linux/io.h> -#include <linux/of.h> -#include <linux/of_address.h> -#include <linux/of_irq.h> -#include <linux/of_platform.h> -#include <linux/slab.h> -#include <linux/amba/bus.h> -#include <linux/amba/mmci.h> -#include <asm/mach-types.h> -#include <asm/mach/arch.h> -#include <asm/mach/map.h> - -/* macro to get at MMIO space when running virtually */ -#define IO_ADDRESS(x) (((x) & 0x0fffffff) + (((x) >> 4) & 0x0f000000) + 0xf0000000) -#define __io_address(n) ((void __iomem __force *)IO_ADDRESS(n)) - -/* - * ------------------------------------------------------------------------ - * Versatile Registers - * ------------------------------------------------------------------------ - */ -#define VERSATILE_SYS_PCICTL_OFFSET 0x44 -#define VERSATILE_SYS_MCI_OFFSET 0x48 - -/* - * VERSATILE peripheral addresses - */ -#define VERSATILE_MMCI0_BASE 0x10005000 /* MMC interface */ -#define VERSATILE_MMCI1_BASE 0x1000B000 /* MMC Interface */ -#define VERSATILE_SCTL_BASE 0x101E0000 /* System controller */ - -/* - * System controller bit assignment - */ -#define VERSATILE_REFCLK 0 -#define VERSATILE_TIMCLK 1 - -#define VERSATILE_TIMER1_EnSel 15 -#define VERSATILE_TIMER2_EnSel 17 -#define VERSATILE_TIMER3_EnSel 19 -#define VERSATILE_TIMER4_EnSel 21 - -static void __iomem *versatile_sys_base; - -unsigned int mmc_status(struct device *dev) -{ - struct amba_device *adev = container_of(dev, struct amba_device, dev); - u32 mask; - - if (adev->res.start == VERSATILE_MMCI0_BASE) - mask = 1; - else - mask = 2; - - return readl(versatile_sys_base + VERSATILE_SYS_MCI_OFFSET) & mask; -} - -static struct mmci_platform_data mmc0_plat_data = { - .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34, - .status = mmc_status, -}; - -static struct mmci_platform_data mmc1_plat_data = { - .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34, - .status = mmc_status, -}; - -/* - * Lookup table for attaching a specific name and platform_data pointer to - * devices as they get created by of_platform_populate(). Ideally this table - * would not exist, but the current clock implementation depends on some devices - * having a specific name. - */ -struct of_dev_auxdata versatile_auxdata_lookup[] __initdata = { - OF_DEV_AUXDATA("arm,primecell", VERSATILE_MMCI0_BASE, "fpga:05", &mmc0_plat_data), - OF_DEV_AUXDATA("arm,primecell", VERSATILE_MMCI1_BASE, "fpga:0b", &mmc1_plat_data), - {} -}; - -static struct map_desc versatile_io_desc[] __initdata __maybe_unused = { - { - .virtual = IO_ADDRESS(VERSATILE_SCTL_BASE), - .pfn = __phys_to_pfn(VERSATILE_SCTL_BASE), - .length = SZ_4K * 9, - .type = MT_DEVICE - } -}; - -static void __init versatile_map_io(void) -{ - debug_ll_io_init(); - iotable_init(versatile_io_desc, ARRAY_SIZE(versatile_io_desc)); -} - -static void __init versatile_init_early(void) -{ - u32 val; - - /* - * set clock frequency: - * VERSATILE_REFCLK is 32KHz - * VERSATILE_TIMCLK is 1MHz - */ - val = readl(__io_address(VERSATILE_SCTL_BASE)); - writel((VERSATILE_TIMCLK << VERSATILE_TIMER1_EnSel) | - (VERSATILE_TIMCLK << VERSATILE_TIMER2_EnSel) | - (VERSATILE_TIMCLK << VERSATILE_TIMER3_EnSel) | - (VERSATILE_TIMCLK << VERSATILE_TIMER4_EnSel) | val, - __io_address(VERSATILE_SCTL_BASE)); -} - -static void __init versatile_dt_pci_init(void) -{ - u32 val; - struct device_node *np; - struct property *newprop; - - np = of_find_compatible_node(NULL, NULL, "arm,versatile-pci"); - if (!np) - return; - - /* Check if PCI backplane is detected */ - val = readl(versatile_sys_base + VERSATILE_SYS_PCICTL_OFFSET); - if (val & 1) { - /* - * Enable PCI accesses. Note that the documentaton is - * inconsistent whether or not this is needed, but the old - * driver had it so we will keep it. - */ - writel(1, versatile_sys_base + VERSATILE_SYS_PCICTL_OFFSET); - goto out_put_node; - } - - newprop = kzalloc(sizeof(*newprop), GFP_KERNEL); - if (!newprop) - goto out_put_node; - - newprop->name = kstrdup("status", GFP_KERNEL); - newprop->value = kstrdup("disabled", GFP_KERNEL); - newprop->length = sizeof("disabled"); - of_update_property(np, newprop); - - pr_info("Not plugged into PCI backplane!\n"); - -out_put_node: - of_node_put(np); -} - -static void __init versatile_dt_init(void) -{ - struct device_node *np; - - np = of_find_compatible_node(NULL, NULL, "arm,core-module-versatile"); - if (np) - versatile_sys_base = of_iomap(np, 0); - WARN_ON(!versatile_sys_base); - - versatile_dt_pci_init(); - - of_platform_default_populate(NULL, versatile_auxdata_lookup, NULL); -} - -static const char *const versatile_dt_match[] __initconst = { - "arm,versatile-ab", - "arm,versatile-pb", - NULL, -}; - -DT_MACHINE_START(VERSATILE_PB, "ARM-Versatile (Device Tree Support)") - .map_io = versatile_map_io, - .init_early = versatile_init_early, - .init_machine = versatile_dt_init, - .dt_compat = versatile_dt_match, -MACHINE_END |