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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/arm/mach-mvebu/board-v7.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/mach-mvebu/board-v7.c')
-rw-r--r--arch/arm/mach-mvebu/board-v7.c207
1 files changed, 207 insertions, 0 deletions
diff --git a/arch/arm/mach-mvebu/board-v7.c b/arch/arm/mach-mvebu/board-v7.c
new file mode 100644
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+++ b/arch/arm/mach-mvebu/board-v7.c
@@ -0,0 +1,207 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Device Tree support for Armada 370 and XP platforms.
+ *
+ * Copyright (C) 2012 Marvell
+ *
+ * Lior Amsalem <alior@marvell.com>
+ * Gregory CLEMENT <gregory.clement@free-electrons.com>
+ * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/of_address.h>
+#include <linux/of_fdt.h>
+#include <linux/io.h>
+#include <linux/clocksource.h>
+#include <linux/dma-mapping.h>
+#include <linux/memblock.h>
+#include <linux/mbus.h>
+#include <linux/slab.h>
+#include <linux/irqchip.h>
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/time.h>
+#include <asm/smp_scu.h>
+#include "armada-370-xp.h"
+#include "common.h"
+#include "coherency.h"
+#include "mvebu-soc-id.h"
+
+static void __iomem *scu_base;
+
+/*
+ * Enables the SCU when available. Obviously, this is only useful on
+ * Cortex-A based SOCs, not on PJ4B based ones.
+ */
+static void __init mvebu_scu_enable(void)
+{
+ struct device_node *np =
+ of_find_compatible_node(NULL, NULL, "arm,cortex-a9-scu");
+ if (np) {
+ scu_base = of_iomap(np, 0);
+ scu_enable(scu_base);
+ of_node_put(np);
+ }
+}
+
+void __iomem *mvebu_get_scu_base(void)
+{
+ return scu_base;
+}
+
+/*
+ * When returning from suspend, the platform goes through the
+ * bootloader, which executes its DDR3 training code. This code has
+ * the unfortunate idea of using the first 10 KB of each DRAM bank to
+ * exercise the RAM and calculate the optimal timings. Therefore, this
+ * area of RAM is overwritten, and shouldn't be used by the kernel if
+ * suspend/resume is supported.
+ */
+
+#ifdef CONFIG_SUSPEND
+#define MVEBU_DDR_TRAINING_AREA_SZ (10 * SZ_1K)
+static int __init mvebu_scan_mem(unsigned long node, const char *uname,
+ int depth, void *data)
+{
+ const char *type = of_get_flat_dt_prop(node, "device_type", NULL);
+ const __be32 *reg, *endp;
+ int l;
+
+ if (type == NULL || strcmp(type, "memory"))
+ return 0;
+
+ reg = of_get_flat_dt_prop(node, "linux,usable-memory", &l);
+ if (reg == NULL)
+ reg = of_get_flat_dt_prop(node, "reg", &l);
+ if (reg == NULL)
+ return 0;
+
+ endp = reg + (l / sizeof(__be32));
+ while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) {
+ u64 base, size;
+
+ base = dt_mem_next_cell(dt_root_addr_cells, &reg);
+ size = dt_mem_next_cell(dt_root_size_cells, &reg);
+
+ memblock_reserve(base, MVEBU_DDR_TRAINING_AREA_SZ);
+ }
+
+ return 0;
+}
+
+static void __init mvebu_memblock_reserve(void)
+{
+ of_scan_flat_dt(mvebu_scan_mem, NULL);
+}
+#else
+static void __init mvebu_memblock_reserve(void) {}
+#endif
+
+static void __init mvebu_init_irq(void)
+{
+ irqchip_init();
+ mvebu_scu_enable();
+ coherency_init();
+ BUG_ON(mvebu_mbus_dt_init(coherency_available()));
+}
+
+static void __init i2c_quirk(void)
+{
+ struct device_node *np;
+ u32 dev, rev;
+
+ /*
+ * Only revisons more recent than A0 support the offload
+ * mechanism. We can exit only if we are sure that we can
+ * get the SoC revision and it is more recent than A0.
+ */
+ if (mvebu_get_soc_id(&dev, &rev) == 0 && rev > MV78XX0_A0_REV)
+ return;
+
+ for_each_compatible_node(np, NULL, "marvell,mv78230-i2c") {
+ struct property *new_compat;
+
+ new_compat = kzalloc(sizeof(*new_compat), GFP_KERNEL);
+
+ new_compat->name = kstrdup("compatible", GFP_KERNEL);
+ new_compat->length = sizeof("marvell,mv78230-a0-i2c");
+ new_compat->value = kstrdup("marvell,mv78230-a0-i2c",
+ GFP_KERNEL);
+
+ of_update_property(np, new_compat);
+ }
+}
+
+static void __init mvebu_dt_init(void)
+{
+ if (of_machine_is_compatible("marvell,armadaxp"))
+ i2c_quirk();
+}
+
+static void __init armada_370_xp_dt_fixup(void)
+{
+#ifdef CONFIG_SMP
+ smp_set_ops(smp_ops(armada_xp_smp_ops));
+#endif
+}
+
+static const char * const armada_370_xp_dt_compat[] __initconst = {
+ "marvell,armada-370-xp",
+ NULL,
+};
+
+DT_MACHINE_START(ARMADA_370_XP_DT, "Marvell Armada 370/XP (Device Tree)")
+ .l2c_aux_val = 0,
+ .l2c_aux_mask = ~0,
+ .init_machine = mvebu_dt_init,
+ .init_irq = mvebu_init_irq,
+ .restart = mvebu_restart,
+ .reserve = mvebu_memblock_reserve,
+ .dt_compat = armada_370_xp_dt_compat,
+ .dt_fixup = armada_370_xp_dt_fixup,
+MACHINE_END
+
+static const char * const armada_375_dt_compat[] __initconst = {
+ "marvell,armada375",
+ NULL,
+};
+
+DT_MACHINE_START(ARMADA_375_DT, "Marvell Armada 375 (Device Tree)")
+ .l2c_aux_val = 0,
+ .l2c_aux_mask = ~0,
+ .init_irq = mvebu_init_irq,
+ .init_machine = mvebu_dt_init,
+ .restart = mvebu_restart,
+ .dt_compat = armada_375_dt_compat,
+MACHINE_END
+
+static const char * const armada_38x_dt_compat[] __initconst = {
+ "marvell,armada380",
+ "marvell,armada385",
+ NULL,
+};
+
+DT_MACHINE_START(ARMADA_38X_DT, "Marvell Armada 380/385 (Device Tree)")
+ .l2c_aux_val = 0,
+ .l2c_aux_mask = ~0,
+ .init_irq = mvebu_init_irq,
+ .restart = mvebu_restart,
+ .dt_compat = armada_38x_dt_compat,
+MACHINE_END
+
+static const char * const armada_39x_dt_compat[] __initconst = {
+ "marvell,armada390",
+ "marvell,armada398",
+ NULL,
+};
+
+DT_MACHINE_START(ARMADA_39X_DT, "Marvell Armada 39x (Device Tree)")
+ .l2c_aux_val = 0,
+ .l2c_aux_mask = ~0,
+ .init_irq = mvebu_init_irq,
+ .restart = mvebu_restart,
+ .dt_compat = armada_39x_dt_compat,
+MACHINE_END