v4.19.13 snapshot.
diff --git a/arch/arm/mach-versatile/versatile_dt.c b/arch/arm/mach-versatile/versatile_dt.c
new file mode 100644
index 0000000..3c8d39c
--- /dev/null
+++ b/arch/arm/mach-versatile/versatile_dt.c
@@ -0,0 +1,361 @@
+/*
+ * 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
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#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/clcd.h>
+#include <linux/platform_data/video-clcd-versatile.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
+#define VERSATILE_SYS_CLCD_OFFSET 0x50
+
+/*
+ * VERSATILE peripheral addresses
+ */
+#define VERSATILE_MMCI0_BASE 0x10005000 /* MMC interface */
+#define VERSATILE_MMCI1_BASE 0x1000B000 /* MMC Interface */
+#define VERSATILE_CLCD_BASE 0x10120000 /* CLCD */
+#define VERSATILE_SCTL_BASE 0x101E0000 /* System controller */
+#define VERSATILE_IB2_BASE 0x24000000 /* IB2 module */
+#define VERSATILE_IB2_CTL_BASE (VERSATILE_IB2_BASE + 0x03000000)
+
+/*
+ * 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;
+static void __iomem *versatile_ib2_ctrl;
+
+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,
+ .gpio_wp = -1,
+ .gpio_cd = -1,
+};
+
+static struct mmci_platform_data mmc1_plat_data = {
+ .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
+ .status = mmc_status,
+ .gpio_wp = -1,
+ .gpio_cd = -1,
+};
+
+/*
+ * CLCD support.
+ */
+#define SYS_CLCD_MODE_MASK (3 << 0)
+#define SYS_CLCD_MODE_888 (0 << 0)
+#define SYS_CLCD_MODE_5551 (1 << 0)
+#define SYS_CLCD_MODE_565_RLSB (2 << 0)
+#define SYS_CLCD_MODE_565_BLSB (3 << 0)
+#define SYS_CLCD_NLCDIOON (1 << 2)
+#define SYS_CLCD_VDDPOSSWITCH (1 << 3)
+#define SYS_CLCD_PWR3V5SWITCH (1 << 4)
+#define SYS_CLCD_ID_MASK (0x1f << 8)
+#define SYS_CLCD_ID_SANYO_3_8 (0x00 << 8)
+#define SYS_CLCD_ID_UNKNOWN_8_4 (0x01 << 8)
+#define SYS_CLCD_ID_EPSON_2_2 (0x02 << 8)
+#define SYS_CLCD_ID_SANYO_2_5 (0x07 << 8)
+#define SYS_CLCD_ID_VGA (0x1f << 8)
+
+static bool is_sanyo_2_5_lcd;
+
+/*
+ * Disable all display connectors on the interface module.
+ */
+static void versatile_clcd_disable(struct clcd_fb *fb)
+{
+ void __iomem *sys_clcd = versatile_sys_base + VERSATILE_SYS_CLCD_OFFSET;
+ u32 val;
+
+ val = readl(sys_clcd);
+ val &= ~SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
+ writel(val, sys_clcd);
+
+ /*
+ * If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light off
+ */
+ if (of_machine_is_compatible("arm,versatile-ab") && is_sanyo_2_5_lcd) {
+ unsigned long ctrl;
+
+ ctrl = readl(versatile_ib2_ctrl);
+ ctrl &= ~0x01;
+ writel(ctrl, versatile_ib2_ctrl);
+ }
+}
+
+/*
+ * Enable the relevant connector on the interface module.
+ */
+static void versatile_clcd_enable(struct clcd_fb *fb)
+{
+ struct fb_var_screeninfo *var = &fb->fb.var;
+ void __iomem *sys_clcd = versatile_sys_base + VERSATILE_SYS_CLCD_OFFSET;
+ u32 val;
+
+ val = readl(sys_clcd);
+ val &= ~SYS_CLCD_MODE_MASK;
+
+ switch (var->green.length) {
+ case 5:
+ val |= SYS_CLCD_MODE_5551;
+ break;
+ case 6:
+ if (var->red.offset == 0)
+ val |= SYS_CLCD_MODE_565_RLSB;
+ else
+ val |= SYS_CLCD_MODE_565_BLSB;
+ break;
+ case 8:
+ val |= SYS_CLCD_MODE_888;
+ break;
+ }
+
+ /*
+ * Set the MUX
+ */
+ writel(val, sys_clcd);
+
+ /*
+ * And now enable the PSUs
+ */
+ val |= SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
+ writel(val, sys_clcd);
+
+ /*
+ * If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light on
+ */
+ if (of_machine_is_compatible("arm,versatile-ab") && is_sanyo_2_5_lcd) {
+ unsigned long ctrl;
+
+ ctrl = readl(versatile_ib2_ctrl);
+ ctrl |= 0x01;
+ writel(ctrl, versatile_ib2_ctrl);
+ }
+}
+
+/*
+ * Detect which LCD panel is connected, and return the appropriate
+ * clcd_panel structure. Note: we do not have any information on
+ * the required timings for the 8.4in panel, so we presently assume
+ * VGA timings.
+ */
+static int versatile_clcd_setup(struct clcd_fb *fb)
+{
+ void __iomem *sys_clcd = versatile_sys_base + VERSATILE_SYS_CLCD_OFFSET;
+ const char *panel_name;
+ u32 val;
+
+ is_sanyo_2_5_lcd = false;
+
+ val = readl(sys_clcd) & SYS_CLCD_ID_MASK;
+ if (val == SYS_CLCD_ID_SANYO_3_8)
+ panel_name = "Sanyo TM38QV67A02A";
+ else if (val == SYS_CLCD_ID_SANYO_2_5) {
+ panel_name = "Sanyo QVGA Portrait";
+ is_sanyo_2_5_lcd = true;
+ } else if (val == SYS_CLCD_ID_EPSON_2_2)
+ panel_name = "Epson L2F50113T00";
+ else if (val == SYS_CLCD_ID_VGA)
+ panel_name = "VGA";
+ else {
+ printk(KERN_ERR "CLCD: unknown LCD panel ID 0x%08x, using VGA\n",
+ val);
+ panel_name = "VGA";
+ }
+
+ fb->panel = versatile_clcd_get_panel(panel_name);
+ if (!fb->panel)
+ return -EINVAL;
+
+ return versatile_clcd_setup_dma(fb, SZ_1M);
+}
+
+static void versatile_clcd_decode(struct clcd_fb *fb, struct clcd_regs *regs)
+{
+ clcdfb_decode(fb, regs);
+
+ /* Always clear BGR for RGB565: we do the routing externally */
+ if (fb->fb.var.green.length == 6)
+ regs->cntl &= ~CNTL_BGR;
+}
+
+static struct clcd_board clcd_plat_data = {
+ .name = "Versatile",
+ .caps = CLCD_CAP_5551 | CLCD_CAP_565 | CLCD_CAP_888,
+ .check = clcdfb_check,
+ .decode = versatile_clcd_decode,
+ .disable = versatile_clcd_disable,
+ .enable = versatile_clcd_enable,
+ .setup = versatile_clcd_setup,
+ .mmap = versatile_clcd_mmap_dma,
+ .remove = versatile_clcd_remove_dma,
+};
+
+/*
+ * 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),
+ OF_DEV_AUXDATA("arm,primecell", VERSATILE_CLCD_BASE, "dev:20", &clcd_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);
+ return;
+ }
+
+ newprop = kzalloc(sizeof(*newprop), GFP_KERNEL);
+ if (!newprop)
+ return;
+
+ 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");
+}
+
+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_ib2_ctrl = ioremap(VERSATILE_IB2_CTL_BASE, SZ_4K);
+
+ 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