h8300: switch EARLYCON

earlyprintk is architecture specific option.
earlycon is generic and small footprint.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>

3 files changed, 10 insertions, 66 deletions

diff --git a/arch/h8300/configs/h8300h-sim_defconfig b/arch/h8300/configs/h8300h-sim_defconfig
index 067bfe9c49b3..80624f46b0ed 100644
--- a/arch/h8300/configs/h8300h-sim_defconfig
+++ b/arch/h8300/configs/h8300h-sim_defconfig
@@ -34,7 +34,7 @@ CONFIG_BINFMT_FLAT=y
 # CONFIG_LEGACY_PTYS is not set
 # CONFIG_DEVKMEM is not set
 CONFIG_SERIAL_SH_SCI=y
-CONFIG_SERIAL_SH_SCI_CONSOLE=y
+CONFIG_SERIAL_SH_SCI_EARLYCON=y
 # CONFIG_HW_RANDOM is not set
 # CONFIG_HWMON is not set
 # CONFIG_USB_SUPPORT is not set
diff --git a/arch/h8300/kernel/setup.c b/arch/h8300/kernel/setup.c
index e4985dfa91dc..c8c25a4e9e48 100644
--- a/arch/h8300/kernel/setup.c
+++ b/arch/h8300/kernel/setup.c
@@ -20,8 +20,6 @@
 #include <linux/bootmem.h>
 #include <linux/seq_file.h>
 #include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_fdt.h>
 #include <linux/of_platform.h>
@@ -137,11 +135,6 @@ void __init setup_arch(char **cmdline_p)
         parse_early_param();
 
         bootmem_init();
-#if defined(CONFIG_H8300H_SIM) || defined(CONFIG_H8S_SIM)
-        sim_console_register();
-#endif
-
-        early_platform_driver_probe("earlyprintk", 1, 0);
         /*
          * get kmalloc into gear
          */
diff --git a/arch/h8300/kernel/sim-console.c b/arch/h8300/kernel/sim-console.c
index a15edf0565d9..46138f55a9ea 100644
--- a/arch/h8300/kernel/sim-console.c
+++ b/arch/h8300/kernel/sim-console.c
@@ -1,79 +1,30 @@
 /*
- * arch/h8300/kernel/early_printk.c
+ * arch/h8300/kernel/sim-console.c
  *
- *  Copyright (C) 2009 Yoshinori Sato <ysato@users.sourceforge.jp>
+ *  Copyright (C) 2015 Yoshinori Sato <ysato@users.sourceforge.jp>
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  */
 #include <linux/console.h>
-#include <linux/tty.h>
 #include <linux/init.h>
-#include <linux/io.h>
-#include <linux/platform_device.h>
+#include <linux/serial_core.h>
 
-static void sim_write(struct console *co, const char *ptr,
-                                 unsigned len)
+static void sim_write(struct console *con, const char *s, unsigned n)
 {
         register const int fd __asm__("er0") = 1; /* stdout */
-        register const char *_ptr __asm__("er1") = ptr;
-        register const unsigned _len __asm__("er2") = len;
+        register const char *_ptr __asm__("er1") = s;
+        register const unsigned _len __asm__("er2") = n;
 
         __asm__(".byte 0x5e,0x00,0x00,0xc7\n\t" /* jsr @0xc7 (sys_write) */
                 : : "g"(fd), "g"(_ptr), "g"(_len));
 }
 
-static struct console sim_console = {
-        .name           = "sim_console",
-        .write          = sim_write,
-        .setup          = NULL,
-        .flags          = CON_PRINTBUFFER,
-        .index          = -1,
-};
-
-static char sim_console_buf[32];
-
-static int sim_probe(struct platform_device *pdev)
-{
-        if (sim_console.data)
-                return -EEXIST;
-
-        if (!strstr(sim_console_buf, "keep"))
-                sim_console.flags |= CON_BOOT;
-
-        register_console(&sim_console);
-        return 0;
-}
-
-static int sim_remove(struct platform_device *pdev)
+static int __init sim_setup(struct earlycon_device *device, const char *opt)
 {
+        device->con->write = sim_write;
         return 0;
 }
 
-static struct platform_driver sim_driver = {
-        .probe          = sim_probe,
-        .remove         = sim_remove,
-        .driver         = {
-                .name   = "h8300-sim",
-                .owner  = THIS_MODULE,
-        },
-};
-
-early_platform_init_buffer("earlyprintk", &sim_driver,
-                           sim_console_buf, ARRAY_SIZE(sim_console_buf));
-
-static struct platform_device sim_console_device = {
-        .name           = "h8300-sim",
-        .id             = 0,
-};
-
-static struct platform_device *devices[] __initdata = {
-        &sim_console_device,
-};
-
-void __init sim_console_register(void)
-{
-        early_platform_add_devices(devices,
-                                   ARRAY_SIZE(devices));
-}
+EARLYCON_DECLARE(h8sim, sim_setup);