v4.19.13 snapshot.
diff --git a/arch/sparc/kernel/central.c b/arch/sparc/kernel/central.c
new file mode 100644
index 0000000..38ae4fd
--- /dev/null
+++ b/arch/sparc/kernel/central.c
@@ -0,0 +1,271 @@
+// SPDX-License-Identifier: GPL-2.0
+/* central.c: Central FHC driver for Sunfire/Starfire/Wildfire.
+ *
+ * Copyright (C) 1997, 1999, 2008 David S. Miller (davem@davemloft.net)
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+
+#include <asm/fhc.h>
+#include <asm/upa.h>
+
+struct clock_board {
+ void __iomem *clock_freq_regs;
+ void __iomem *clock_regs;
+ void __iomem *clock_ver_reg;
+ int num_slots;
+ struct resource leds_resource;
+ struct platform_device leds_pdev;
+};
+
+struct fhc {
+ void __iomem *pregs;
+ bool central;
+ bool jtag_master;
+ int board_num;
+ struct resource leds_resource;
+ struct platform_device leds_pdev;
+};
+
+static int clock_board_calc_nslots(struct clock_board *p)
+{
+ u8 reg = upa_readb(p->clock_regs + CLOCK_STAT1) & 0xc0;
+
+ switch (reg) {
+ case 0x40:
+ return 16;
+
+ case 0xc0:
+ return 8;
+
+ case 0x80:
+ reg = 0;
+ if (p->clock_ver_reg)
+ reg = upa_readb(p->clock_ver_reg);
+ if (reg) {
+ if (reg & 0x80)
+ return 4;
+ else
+ return 5;
+ }
+ /* Fallthrough */
+ default:
+ return 4;
+ }
+}
+
+static int clock_board_probe(struct platform_device *op)
+{
+ struct clock_board *p = kzalloc(sizeof(*p), GFP_KERNEL);
+ int err = -ENOMEM;
+
+ if (!p) {
+ printk(KERN_ERR "clock_board: Cannot allocate struct clock_board\n");
+ goto out;
+ }
+
+ p->clock_freq_regs = of_ioremap(&op->resource[0], 0,
+ resource_size(&op->resource[0]),
+ "clock_board_freq");
+ if (!p->clock_freq_regs) {
+ printk(KERN_ERR "clock_board: Cannot map clock_freq_regs\n");
+ goto out_free;
+ }
+
+ p->clock_regs = of_ioremap(&op->resource[1], 0,
+ resource_size(&op->resource[1]),
+ "clock_board_regs");
+ if (!p->clock_regs) {
+ printk(KERN_ERR "clock_board: Cannot map clock_regs\n");
+ goto out_unmap_clock_freq_regs;
+ }
+
+ if (op->resource[2].flags) {
+ p->clock_ver_reg = of_ioremap(&op->resource[2], 0,
+ resource_size(&op->resource[2]),
+ "clock_ver_reg");
+ if (!p->clock_ver_reg) {
+ printk(KERN_ERR "clock_board: Cannot map clock_ver_reg\n");
+ goto out_unmap_clock_regs;
+ }
+ }
+
+ p->num_slots = clock_board_calc_nslots(p);
+
+ p->leds_resource.start = (unsigned long)
+ (p->clock_regs + CLOCK_CTRL);
+ p->leds_resource.end = p->leds_resource.start;
+ p->leds_resource.name = "leds";
+
+ p->leds_pdev.name = "sunfire-clockboard-leds";
+ p->leds_pdev.id = -1;
+ p->leds_pdev.resource = &p->leds_resource;
+ p->leds_pdev.num_resources = 1;
+ p->leds_pdev.dev.parent = &op->dev;
+
+ err = platform_device_register(&p->leds_pdev);
+ if (err) {
+ printk(KERN_ERR "clock_board: Could not register LEDS "
+ "platform device\n");
+ goto out_unmap_clock_ver_reg;
+ }
+
+ printk(KERN_INFO "clock_board: Detected %d slot Enterprise system.\n",
+ p->num_slots);
+
+ err = 0;
+out:
+ return err;
+
+out_unmap_clock_ver_reg:
+ if (p->clock_ver_reg)
+ of_iounmap(&op->resource[2], p->clock_ver_reg,
+ resource_size(&op->resource[2]));
+
+out_unmap_clock_regs:
+ of_iounmap(&op->resource[1], p->clock_regs,
+ resource_size(&op->resource[1]));
+
+out_unmap_clock_freq_regs:
+ of_iounmap(&op->resource[0], p->clock_freq_regs,
+ resource_size(&op->resource[0]));
+
+out_free:
+ kfree(p);
+ goto out;
+}
+
+static const struct of_device_id clock_board_match[] = {
+ {
+ .name = "clock-board",
+ },
+ {},
+};
+
+static struct platform_driver clock_board_driver = {
+ .probe = clock_board_probe,
+ .driver = {
+ .name = "clock_board",
+ .of_match_table = clock_board_match,
+ },
+};
+
+static int fhc_probe(struct platform_device *op)
+{
+ struct fhc *p = kzalloc(sizeof(*p), GFP_KERNEL);
+ int err = -ENOMEM;
+ u32 reg;
+
+ if (!p) {
+ printk(KERN_ERR "fhc: Cannot allocate struct fhc\n");
+ goto out;
+ }
+
+ if (!strcmp(op->dev.of_node->parent->name, "central"))
+ p->central = true;
+
+ p->pregs = of_ioremap(&op->resource[0], 0,
+ resource_size(&op->resource[0]),
+ "fhc_pregs");
+ if (!p->pregs) {
+ printk(KERN_ERR "fhc: Cannot map pregs\n");
+ goto out_free;
+ }
+
+ if (p->central) {
+ reg = upa_readl(p->pregs + FHC_PREGS_BSR);
+ p->board_num = ((reg >> 16) & 1) | ((reg >> 12) & 0x0e);
+ } else {
+ p->board_num = of_getintprop_default(op->dev.of_node, "board#", -1);
+ if (p->board_num == -1) {
+ printk(KERN_ERR "fhc: No board# property\n");
+ goto out_unmap_pregs;
+ }
+ if (upa_readl(p->pregs + FHC_PREGS_JCTRL) & FHC_JTAG_CTRL_MENAB)
+ p->jtag_master = true;
+ }
+
+ if (!p->central) {
+ p->leds_resource.start = (unsigned long)
+ (p->pregs + FHC_PREGS_CTRL);
+ p->leds_resource.end = p->leds_resource.start;
+ p->leds_resource.name = "leds";
+
+ p->leds_pdev.name = "sunfire-fhc-leds";
+ p->leds_pdev.id = p->board_num;
+ p->leds_pdev.resource = &p->leds_resource;
+ p->leds_pdev.num_resources = 1;
+ p->leds_pdev.dev.parent = &op->dev;
+
+ err = platform_device_register(&p->leds_pdev);
+ if (err) {
+ printk(KERN_ERR "fhc: Could not register LEDS "
+ "platform device\n");
+ goto out_unmap_pregs;
+ }
+ }
+ reg = upa_readl(p->pregs + FHC_PREGS_CTRL);
+
+ if (!p->central)
+ reg |= FHC_CONTROL_IXIST;
+
+ reg &= ~(FHC_CONTROL_AOFF |
+ FHC_CONTROL_BOFF |
+ FHC_CONTROL_SLINE);
+
+ upa_writel(reg, p->pregs + FHC_PREGS_CTRL);
+ upa_readl(p->pregs + FHC_PREGS_CTRL);
+
+ reg = upa_readl(p->pregs + FHC_PREGS_ID);
+ printk(KERN_INFO "fhc: Board #%d, Version[%x] PartID[%x] Manuf[%x] %s\n",
+ p->board_num,
+ (reg & FHC_ID_VERS) >> 28,
+ (reg & FHC_ID_PARTID) >> 12,
+ (reg & FHC_ID_MANUF) >> 1,
+ (p->jtag_master ?
+ "(JTAG Master)" :
+ (p->central ? "(Central)" : "")));
+
+ err = 0;
+
+out:
+ return err;
+
+out_unmap_pregs:
+ of_iounmap(&op->resource[0], p->pregs, resource_size(&op->resource[0]));
+
+out_free:
+ kfree(p);
+ goto out;
+}
+
+static const struct of_device_id fhc_match[] = {
+ {
+ .name = "fhc",
+ },
+ {},
+};
+
+static struct platform_driver fhc_driver = {
+ .probe = fhc_probe,
+ .driver = {
+ .name = "fhc",
+ .of_match_table = fhc_match,
+ },
+};
+
+static int __init sunfire_init(void)
+{
+ (void) platform_driver_register(&fhc_driver);
+ (void) platform_driver_register(&clock_board_driver);
+ return 0;
+}
+
+fs_initcall(sunfire_init);