[PATCH v3 05/30] serial: serial_pl01x: Implement .getinfo() for PL01

[Patrick Rudolph]

From: Maximilian Brune <maximilian.brune at 9elements.com>

When ACPI is enabled on arm it will use the getinfo function to fill
the SPCR ACPI table.

Signed-off-by: Maximilian Brune <maximilian.brune at 9elements.com>
Reviewed-by: Simon Glass <sjg at chromium.org>
Cc: Simon Glass <sjg at chromium.org>
Cc: Tom Rini <trini at konsulko.com>
---
 boot/bootflow.c               |  8 ++++++--
 drivers/serial/serial_pl01x.c | 24 ++++++++++++++++++++++++
 include/serial.h              |  1 +
 3 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/boot/bootflow.c b/boot/bootflow.c
index 59d77d2385..d8807eb109 100644
--- a/boot/bootflow.c
+++ b/boot/bootflow.c
@@ -936,11 +936,15 @@ int bootflow_cmdline_auto(struct bootflow *bflow, const char *arg)
 		return ret;
 
 	*buf = '\0';
-	if (!strcmp("earlycon", arg)) {
+	if (!strcmp("earlycon", arg) && info.type == SERIAL_CHIP_16550_COMPATIBLE) {
 		snprintf(buf, sizeof(buf),
 			 "uart8250,mmio32,%#lx,%dn8", info.addr,
 			 info.baudrate);
-	} else if (!strcmp("console", arg)) {
+	} else if (!strcmp("earlycon", arg) && info.type == SERIAL_CHIP_PL01X) {
+		snprintf(buf, sizeof(buf),
+			 "pl011,mmio32,%#lx,%dn8", info.addr,
+			 info.baudrate);
+	} else if (!strcmp("console", arg) && info.type == SERIAL_CHIP_16550_COMPATIBLE) {
 		snprintf(buf, sizeof(buf),
 			 "ttyS0,%dn8", info.baudrate);
 	}
diff --git a/drivers/serial/serial_pl01x.c b/drivers/serial/serial_pl01x.c
index 80c35963b8..ab67922d18 100644
--- a/drivers/serial/serial_pl01x.c
+++ b/drivers/serial/serial_pl01x.c
@@ -19,6 +19,7 @@
 #include <watchdog.h>
 #include <asm/io.h>
 #include <serial.h>
+#include <spl.h>
 #include <dm/device_compat.h>
 #include <dm/platform_data/serial_pl01x.h>
 #include <linux/compiler.h>
@@ -272,6 +273,28 @@ __weak struct serial_device *default_serial_console(void)
 	return &pl01x_serial_drv;
 }
 #else
+
+static int pl01x_serial_getinfo(struct udevice *dev,
+				struct serial_device_info *info)
+{
+	struct pl01x_serial_plat *plat = dev_get_plat(dev);
+
+	/* save code size */
+	if (!spl_in_proper())
+		return -ENOSYS;
+
+	info->type = SERIAL_CHIP_PL01X;
+	info->addr_space = SERIAL_ADDRESS_SPACE_MEMORY;
+	info->addr = plat->base;
+	info->size = 0x1000;
+	info->reg_width = 4;
+	info->reg_shift = 2;
+	info->reg_offset = 0;
+	info->clock = plat->clock;
+
+	return 0;
+}
+
 int pl01x_serial_setbrg(struct udevice *dev, int baudrate)
 {
 	struct pl01x_serial_plat *plat = dev_get_plat(dev);
@@ -341,6 +364,7 @@ static const struct dm_serial_ops pl01x_serial_ops = {
 	.pending = pl01x_serial_pending,
 	.getc = pl01x_serial_getc,
 	.setbrg = pl01x_serial_setbrg,
+	.getinfo = pl01x_serial_getinfo,
 };
 
 #if CONFIG_IS_ENABLED(OF_REAL)
diff --git a/include/serial.h b/include/serial.h
index d129dc3253..d7a9a8cfb8 100644
--- a/include/serial.h
+++ b/include/serial.h
@@ -124,6 +124,7 @@ enum serial_stop {
 enum serial_chip_type {
 	SERIAL_CHIP_UNKNOWN = -1,
 	SERIAL_CHIP_16550_COMPATIBLE,
+	SERIAL_CHIP_PL01X,
 };
 
 enum adr_space_type {
-- 
2.46.0