Some devices may have a much more efficient way to output strings
rather than single characters. Let console devices implement a
callback for this.

Signed-off-by: Sascha Hauer <[email protected]>
---
 common/console.c  | 29 +++++++++++++++++++++++++++++
 include/console.h |  1 +
 2 files changed, 30 insertions(+)

diff --git a/common/console.c b/common/console.c
index aa9e3ce..b319835 100644
--- a/common/console.c
+++ b/common/console.c
@@ -162,6 +162,22 @@ static void console_set_stdoutpath(struct console_device 
*cdev)
        free(str);
 }
 
+static int __console_puts(struct console_device *cdev, const char *s)
+{
+       int n = 0;
+
+       while (*s) {
+               if (*s == '\n') {
+                       cdev->putc(cdev, '\r');
+                       n++;
+               }
+               cdev->putc(cdev, *s);
+               n++;
+               s++;
+       }
+       return n;
+}
+
 int console_register(struct console_device *newcdev)
 {
        struct device_d *dev = &newcdev->class_dev;
@@ -182,6 +198,9 @@ int console_register(struct console_device *newcdev)
                        NULL, &newcdev->baudrate, "%u", newcdev);
        }
 
+       if (newcdev->putc && !newcdev->puts)
+               newcdev->puts = __console_puts;
+
        dev_add_param(dev, "active", console_std_set, NULL, 0);
 
        if (IS_ENABLED(CONFIG_CONSOLE_ACTIVATE_FIRST)) {
@@ -342,9 +361,19 @@ EXPORT_SYMBOL(console_putc);
 
 int console_puts(unsigned int ch, const char *str)
 {
+       struct console_device *cdev;
        const char *s = str;
        int n = 0;
 
+       if (initialized == CONSOLE_INIT_FULL) {
+               for_each_console(cdev) {
+                       if (cdev->f_active & ch) {
+                               n = cdev->puts(cdev, str);
+                       }
+               }
+               return n;
+       }
+
        while (*s) {
                if (*s == '\n') {
                        console_putc(ch, '\r');
diff --git a/include/console.h b/include/console.h
index 6da0199..6372cfe 100644
--- a/include/console.h
+++ b/include/console.h
@@ -39,6 +39,7 @@ struct console_device {
 
        int (*tstc)(struct console_device *cdev);
        void (*putc)(struct console_device *cdev, char c);
+       int (*puts)(struct console_device *cdev, const char *s);
        int  (*getc)(struct console_device *cdev);
        int (*setbrg)(struct console_device *cdev, int baudrate);
        void (*flush)(struct console_device *cdev);
-- 
2.0.0


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