449c1cd297
- Drop a slew of unused CLCD platform data - Fix OF reference counts -----BEGIN PGP SIGNATURE----- iQIcBAABAgAGBQJc7kmAAAoJEEEQszewGV1z1ZAP/R4nxFgh4f2bTlW0GclNLY5+ B3f5yvEAIhUxKEV2FVjjP+3kg4AFQNMHf6KEzZUzinGp2tv3VaYbOIqRTlvWLWEg KS9OKWNGWxhNdvpv5KqC04UG2WML8DdCqEluyRPjvaqR3LWRbFnx80aPOSPVbx2W rLpVJm4HUth+6m+Fqywv8MzYI692RVTHk6Kg/ZEOdGAgfiCcRPIShFGc/UMxaHB/ AOnUvIlZzJr/7P6hLSZrqKvq5ftA2lI2OsmSHLzooykwT8tg/Cam6lWtY6XbwJNu EnZVqPbbVK/2K0c4bEzv2GEJindMj8hrY+/Wf72HuPWNky3xEB1EUDMwu4xzLndD QRkpUTCkXZ9H8hjsA6SpKtnIG+UIOyyRtvIYhE+QLY1EYRoP0+VOLdm/1W/N4Ucs 9RmxxcMoldl3c9VV0KxAH+xg2nZqqKPJ6ol9Ify8B+VKPSeW1q3pbIKSUiM+F2xp y2/1S9lcAuaqPl90EFMc5RMTx78M1SAP4c/0qpj4w+1oGPOj0rd3WhFzuhtu7Jij ndfVILPYvP10rY/XyQ5FrK/XFXL5/5SMqnv3bN82jXCnE7163UyRPnSZsRay5orf LOPMS6wHbIU30NcVNnviKAIuuAIlsCKvbzskGyQDQNjwj3tQUzg5q6f+YQLDxdJ+ SwaIVxE7geVR5iuS7hb4 =+jk4 -----END PGP SIGNATURE----- Merge tag 'versatile-v5.3-armsoc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator into arm/soc Versatile platform updates for the v5.3 kernel cycle: - Drop a slew of unused CLCD platform data - Fix OF reference counts * tag 'versatile-v5.3-armsoc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator: ARM: versatile: Drop CLCD platform data ARM: versatile: fix a leaked reference by addingmissing of_node_put Signed-off-by: Olof Johansson <olof@lixom.net>
191 lines
5.2 KiB
C
191 lines
5.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Versatile board support using the device tree
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*
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* Copyright (C) 2010 Secret Lab Technologies Ltd.
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* Copyright (C) 2009 Jeremy Kerr <jeremy.kerr@canonical.com>
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* Copyright (C) 2004 ARM Limited
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* Copyright (C) 2000 Deep Blue Solutions Ltd
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*/
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <linux/of_platform.h>
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#include <linux/slab.h>
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#include <linux/amba/bus.h>
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#include <linux/amba/mmci.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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/* macro to get at MMIO space when running virtually */
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#define IO_ADDRESS(x) (((x) & 0x0fffffff) + (((x) >> 4) & 0x0f000000) + 0xf0000000)
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#define __io_address(n) ((void __iomem __force *)IO_ADDRESS(n))
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/*
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* ------------------------------------------------------------------------
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* Versatile Registers
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* ------------------------------------------------------------------------
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*/
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#define VERSATILE_SYS_PCICTL_OFFSET 0x44
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#define VERSATILE_SYS_MCI_OFFSET 0x48
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/*
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* VERSATILE peripheral addresses
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*/
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#define VERSATILE_MMCI0_BASE 0x10005000 /* MMC interface */
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#define VERSATILE_MMCI1_BASE 0x1000B000 /* MMC Interface */
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#define VERSATILE_SCTL_BASE 0x101E0000 /* System controller */
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#define VERSATILE_IB2_BASE 0x24000000 /* IB2 module */
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#define VERSATILE_IB2_CTL_BASE (VERSATILE_IB2_BASE + 0x03000000)
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/*
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* System controller bit assignment
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*/
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#define VERSATILE_REFCLK 0
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#define VERSATILE_TIMCLK 1
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#define VERSATILE_TIMER1_EnSel 15
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#define VERSATILE_TIMER2_EnSel 17
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#define VERSATILE_TIMER3_EnSel 19
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#define VERSATILE_TIMER4_EnSel 21
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static void __iomem *versatile_sys_base;
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static void __iomem *versatile_ib2_ctrl;
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unsigned int mmc_status(struct device *dev)
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{
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struct amba_device *adev = container_of(dev, struct amba_device, dev);
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u32 mask;
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if (adev->res.start == VERSATILE_MMCI0_BASE)
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mask = 1;
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else
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mask = 2;
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return readl(versatile_sys_base + VERSATILE_SYS_MCI_OFFSET) & mask;
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}
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static struct mmci_platform_data mmc0_plat_data = {
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.ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
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.status = mmc_status,
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};
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static struct mmci_platform_data mmc1_plat_data = {
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.ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
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.status = mmc_status,
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};
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/*
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* Lookup table for attaching a specific name and platform_data pointer to
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* devices as they get created by of_platform_populate(). Ideally this table
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* would not exist, but the current clock implementation depends on some devices
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* having a specific name.
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*/
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struct of_dev_auxdata versatile_auxdata_lookup[] __initdata = {
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OF_DEV_AUXDATA("arm,primecell", VERSATILE_MMCI0_BASE, "fpga:05", &mmc0_plat_data),
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OF_DEV_AUXDATA("arm,primecell", VERSATILE_MMCI1_BASE, "fpga:0b", &mmc1_plat_data),
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{}
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};
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static struct map_desc versatile_io_desc[] __initdata __maybe_unused = {
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{
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.virtual = IO_ADDRESS(VERSATILE_SCTL_BASE),
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.pfn = __phys_to_pfn(VERSATILE_SCTL_BASE),
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.length = SZ_4K * 9,
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.type = MT_DEVICE
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}
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};
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static void __init versatile_map_io(void)
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{
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debug_ll_io_init();
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iotable_init(versatile_io_desc, ARRAY_SIZE(versatile_io_desc));
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}
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static void __init versatile_init_early(void)
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{
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u32 val;
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/*
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* set clock frequency:
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* VERSATILE_REFCLK is 32KHz
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* VERSATILE_TIMCLK is 1MHz
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*/
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val = readl(__io_address(VERSATILE_SCTL_BASE));
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writel((VERSATILE_TIMCLK << VERSATILE_TIMER1_EnSel) |
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(VERSATILE_TIMCLK << VERSATILE_TIMER2_EnSel) |
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(VERSATILE_TIMCLK << VERSATILE_TIMER3_EnSel) |
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(VERSATILE_TIMCLK << VERSATILE_TIMER4_EnSel) | val,
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__io_address(VERSATILE_SCTL_BASE));
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}
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static void __init versatile_dt_pci_init(void)
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{
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u32 val;
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struct device_node *np;
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struct property *newprop;
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np = of_find_compatible_node(NULL, NULL, "arm,versatile-pci");
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if (!np)
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return;
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/* Check if PCI backplane is detected */
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val = readl(versatile_sys_base + VERSATILE_SYS_PCICTL_OFFSET);
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if (val & 1) {
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/*
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* Enable PCI accesses. Note that the documentaton is
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* inconsistent whether or not this is needed, but the old
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* driver had it so we will keep it.
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*/
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writel(1, versatile_sys_base + VERSATILE_SYS_PCICTL_OFFSET);
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goto out_put_node;
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}
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newprop = kzalloc(sizeof(*newprop), GFP_KERNEL);
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if (!newprop)
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goto out_put_node;
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newprop->name = kstrdup("status", GFP_KERNEL);
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newprop->value = kstrdup("disabled", GFP_KERNEL);
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newprop->length = sizeof("disabled");
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of_update_property(np, newprop);
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pr_info("Not plugged into PCI backplane!\n");
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out_put_node:
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of_node_put(np);
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}
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static void __init versatile_dt_init(void)
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{
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struct device_node *np;
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np = of_find_compatible_node(NULL, NULL, "arm,core-module-versatile");
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if (np)
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versatile_sys_base = of_iomap(np, 0);
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WARN_ON(!versatile_sys_base);
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versatile_ib2_ctrl = ioremap(VERSATILE_IB2_CTL_BASE, SZ_4K);
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versatile_dt_pci_init();
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of_platform_default_populate(NULL, versatile_auxdata_lookup, NULL);
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}
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static const char *const versatile_dt_match[] __initconst = {
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"arm,versatile-ab",
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"arm,versatile-pb",
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NULL,
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};
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DT_MACHINE_START(VERSATILE_PB, "ARM-Versatile (Device Tree Support)")
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.map_io = versatile_map_io,
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.init_early = versatile_init_early,
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.init_machine = versatile_dt_init,
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.dt_compat = versatile_dt_match,
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MACHINE_END
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