stm32mp: stm32prog: replace alias by serial device sequence number

The command "stm32prog serial <dev>" can directly use the device sequence
number of serial uclass as this sequence number is egual to alias when it
exist; this assumption simplify the code and avoid access to gd->fdt_blob
and the device tree parsing.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>

diff --git a/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog_serial.c b/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog_serial.c
index 373ca20..a51e5e3 100644 (file)
--- a/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog_serial.c
+++ b/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog_serial.c
@@ -187,36 +187,19 @@ static int stm32prog_read(struct stm32prog_data *data, u8 phase, u32 offset,
 int stm32prog_serial_init(struct stm32prog_data *data, int link_dev)
 {
        struct udevice *dev = NULL;
-       int node;
-       char alias[10];
-       const char *path;
        struct dm_serial_ops *ops;
        /* no parity, 8 bits, 1 stop */
        u32 serial_config = SERIAL_DEFAULT_CONFIG;
 
        down_serial_dev = NULL;
 
-       sprintf(alias, "serial%d", link_dev);
-       path = fdt_get_alias(gd->fdt_blob, alias);
-       if (!path) {
-               log_err("%s alias not found", alias);
-               return -ENODEV;
-       }
-       node = fdt_path_offset(gd->fdt_blob, path);
-       if (!uclass_get_device_by_of_offset(UCLASS_SERIAL, node,
-                                           &dev)) {
-               down_serial_dev = dev;
-       } else if (node > 0 &&
-                  !lists_bind_fdt(gd->dm_root, offset_to_ofnode(node),
-                                  &dev, false)) {
-               if (!device_probe(dev))
-                       down_serial_dev = dev;
-       }
-       if (!down_serial_dev) {
-               log_err("%s = %s device not found", alias, path);
+       if (uclass_get_device_by_seq(UCLASS_SERIAL, link_dev, &dev)) {
+               log_err("serial %d device not found\n", link_dev);
                return -ENODEV;
        }
 
+       down_serial_dev = dev;
+
        /* force silent console on uart only when used */
        if (gd->cur_serial_dev == down_serial_dev)
                gd->flags |= GD_FLG_DISABLE_CONSOLE | GD_FLG_SILENT;
@@ -226,11 +209,11 @@ int stm32prog_serial_init(struct stm32prog_data *data, int link_dev)
        ops = serial_get_ops(down_serial_dev);
 
        if (!ops) {
-               log_err("%s = %s missing ops", alias, path);
+               log_err("serial %d = %s missing ops\n", link_dev, dev->name);
                return -ENODEV;
        }
        if (!ops->setconfig) {
-               log_err("%s = %s missing setconfig", alias, path);
+               log_err("serial %d = %s missing setconfig\n", link_dev, dev->name);
                return -ENODEV;
        }
 

diff --git a/arch/arm/mach-stm32mp/cpu.c b/arch/arm/mach-stm32mp/cpu.c
index 527b629..9a76b56 100644 (file)
--- a/arch/arm/mach-stm32mp/cpu.c
+++ b/arch/arm/mach-stm32mp/cpu.c
@@ -466,7 +466,6 @@ static void setup_boot_mode(void)
        unsigned int instance = (boot_mode & TAMP_BOOT_INSTANCE_MASK) - 1;
        u32 forced_mode = (boot_ctx & TAMP_BOOT_FORCED_MASK);
        struct udevice *dev;
-       int alias;
 
        log_debug("%s: boot_ctx=0x%x => boot_mode=%x, instance=%d forced=%x\n",
                  __func__, boot_ctx, boot_mode, instance, forced_mode);
@@ -474,20 +473,18 @@ static void setup_boot_mode(void)
        case BOOT_SERIAL_UART:
                if (instance > ARRAY_SIZE(serial_addr))
                        break;
-               /* serial : search associated alias in devicetree */
+               /* serial : search associated node in devicetree */
                sprintf(cmd, "serial@%x", serial_addr[instance]);
-               if (uclass_get_device_by_name(UCLASS_SERIAL, cmd, &dev) ||
-                   fdtdec_get_alias_seq(gd->fdt_blob, "serial",
-                                        dev_of_offset(dev), &alias)) {
+               if (uclass_get_device_by_name(UCLASS_SERIAL, cmd, &dev)) {
                        /* restore console on error */
                        if (IS_ENABLED(CONFIG_CMD_STM32PROG_SERIAL))
                                gd->flags &= ~(GD_FLG_SILENT |
                                               GD_FLG_DISABLE_CONSOLE);
-                       printf("serial%d = %s not found in device tree!\n",
+                       printf("uart%d = %s not found in device tree!\n",
                               instance, cmd);
                        break;
                }
-               sprintf(cmd, "%d", alias);
+               sprintf(cmd, "%d", dev_seq(dev));
                env_set("boot_device", "serial");
                env_set("boot_instance", cmd);