diff mbox series

[RFC,v2,05/30] arch/sh: setup.c update DeviceTree support.

Message ID 9ede23c8ca6239b449d2e505274def268a07bd86.1694596125.git.ysato@users.sourceforge.jp (mailing list archive)
State New, archived
Headers show
Series Device Tree support for SH7751 based board | expand

Commit Message

Yoshinori Sato Sept. 13, 2023, 9:23 a.m. UTC 
- Get CPU clock frequency for DeviceTree.
- Clean up fdt initialization.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 arch/sh/kernel/setup.c | 34 +++++++++++++++++++++++++---------
 1 file changed, 25 insertions(+), 9 deletions(-)
diff mbox series

Patch

diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index b3da2757faaf..95628ecc41c8 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -31,6 +31,7 @@ 
 #include <linux/memblock.h>
 #include <linux/of.h>
 #include <linux/of_fdt.h>
+#include <linux/libfdt.h>
 #include <linux/uaccess.h>
 #include <uapi/linux/mount.h>
 #include <asm/io.h>
@@ -79,7 +80,9 @@  extern int root_mountflags;
 #define RAMDISK_PROMPT_FLAG		0x8000
 #define RAMDISK_LOAD_FLAG		0x4000
 
+#if !defined(CONFIG_OF) || defined(USE_BUILTIN_DTB)
 static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
+#endif
 
 static struct resource code_resource = {
 	.name = "Kernel code",
@@ -104,6 +107,8 @@  unsigned long memory_limit = 0;
 
 static struct resource mem_resources[MAX_NUMNODES];
 
+static void *dt_virt;
+
 int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
 
 static int __init early_parse_mem(char *p)
@@ -180,7 +185,12 @@  void __init check_for_initrd(void)
 #ifndef CONFIG_GENERIC_CALIBRATE_DELAY
 void calibrate_delay(void)
 {
+#ifndef CONFIG_OF
 	struct clk *clk = clk_get(NULL, "cpu_clk");
+#else
+	struct device_node *cpu = of_find_node_by_name(NULL, "cpu");
+	struct clk *clk = of_clk_get_by_name(cpu, NULL);
+#endif
 
 	if (IS_ERR(clk))
 		panic("Need a sane CPU clock definition!");
@@ -249,7 +259,6 @@  void __init __weak plat_early_device_setup(void)
 void __ref sh_fdt_init(phys_addr_t dt_phys)
 {
 	static int done = 0;
-	void *dt_virt;
 
 	/* Avoid calling an __init function on secondary cpus. */
 	if (done) return;
@@ -274,8 +283,18 @@  void __ref sh_fdt_init(phys_addr_t dt_phys)
 
 void __init setup_arch(char **cmdline_p)
 {
+#ifdef CONFIG_OF
+#ifdef CONFIG_USE_BUILTIN_DTB
+	unflatten_and_copy_device_tree();
+#else
+	memblock_reserve(__pa(dt_virt), fdt_totalsize(dt_virt));
+	unflatten_device_tree();
+#endif
+#endif
 	enable_mmu();
 
+
+#ifndef CONFIG_OF
 	ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
 
 	printk(KERN_NOTICE "Boot params:\n"
@@ -313,10 +332,15 @@  void __init setup_arch(char **cmdline_p)
 	strlcat(command_line, CONFIG_CMDLINE, sizeof(command_line));
 #endif
 #endif
+#endif
 
+#if !defined(CONFIG_OF) || defined(USE_BUILTIN_DTB)
 	/* Save unparsed command line copy for /proc/cmdline */
 	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 	*cmdline_p = command_line;
+#else
+	*cmdline_p = boot_command_line;
+#endif
 
 	parse_early_param();
 
@@ -327,14 +351,6 @@  void __init setup_arch(char **cmdline_p)
 	/* Let earlyprintk output early console messages */
 	sh_early_platform_driver_probe("earlyprintk", 1, 1);
 
-#ifdef CONFIG_OF_EARLY_FLATTREE
-#ifdef CONFIG_USE_BUILTIN_DTB
-	unflatten_and_copy_device_tree();
-#else
-	unflatten_device_tree();
-#endif
-#endif
-
 	paging_init();
 
 	/* Perform the machine specific initialisation */