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Subject[PATCH -next 06/12] of: earlycon: Move address translation to of_setup_earlycon()
Date
Cleanup the early DT/earlycon separation; remove the 'addr' parameter
from of_setup_earlycon() and get the uart phys addr directly with a
new wrapper function, of_flat_dt_translate_addr(). Limit
fdt_translate_address() to file scope.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
---
drivers/of/fdt.c | 7 +------
drivers/of/fdt_address.c | 11 ++++++++++-
drivers/tty/serial/earlycon.c | 11 +++++++----
include/linux/of_fdt.h | 2 +-
include/linux/serial_core.h | 3 +--
5 files changed, 20 insertions(+), 14 deletions(-)

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index a732890..dd2baae 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -792,17 +792,12 @@ int __init early_init_dt_scan_chosen_serial(void)
return -ENODEV;

while (match->compatible[0]) {
- unsigned long addr;
if (fdt_node_check_compatible(fdt, offset, match->compatible)) {
match++;
continue;
}

- addr = fdt_translate_address(fdt, offset);
- if (!addr)
- return -ENXIO;
-
- of_setup_earlycon(addr, match, offset, options);
+ of_setup_earlycon(match, offset, options);
return 0;
}
return -ENODEV;
diff --git a/drivers/of/fdt_address.c b/drivers/of/fdt_address.c
index 8d3dc6f..dca8f9b 100644
--- a/drivers/of/fdt_address.c
+++ b/drivers/of/fdt_address.c
@@ -161,7 +161,7 @@ static int __init fdt_translate_one(const void *blob, int parent,
* that can be mapped to a cpu physical address). This is not really specified
* that way, but this is traditionally the way IBM at least do things
*/
-u64 __init fdt_translate_address(const void *blob, int node_offset)
+static u64 __init fdt_translate_address(const void *blob, int node_offset)
{
int parent, len;
const struct of_bus *bus, *pbus;
@@ -239,3 +239,12 @@ u64 __init fdt_translate_address(const void *blob, int node_offset)
bail:
return result;
}
+
+/**
+ * of_flat_dt_translate_address - translate DT addr into CPU phys addr
+ * @node: node in the flat blob
+ */
+u64 __init of_flat_dt_translate_address(unsigned long node)
+{
+ return fdt_translate_address(initial_boot_params, node);
+}
diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c
index 019010f..b1a4bd1 100644
--- a/drivers/tty/serial/earlycon.c
+++ b/drivers/tty/serial/earlycon.c
@@ -221,8 +221,7 @@ static int __init param_setup_earlycon(char *buf)
}
early_param("earlycon", param_setup_earlycon);

-int __init of_setup_earlycon(unsigned long addr,
- const struct of_device_id *match,
+int __init of_setup_earlycon(const struct of_device_id *match,
unsigned long node,
const char *options)
{
@@ -232,9 +231,13 @@ int __init of_setup_earlycon(unsigned long addr,
const __be32 *val;

port->iotype = UPIO_MEM;
- port->mapbase = addr;
+ port->mapbase = of_flat_dt_translate_address(node);
+ if (!port->mapbase) {
+ pr_warn("[%s] bad address\n", match->name);
+ return -ENXIO;
+ }
port->uartclk = BASE_BAUD * 16;
- port->membase = earlycon_map(addr, SZ_4K);
+ port->membase = earlycon_map(port->mapbase, SZ_4K);

val = of_get_flat_dt_prop(node, "reg-offset", NULL);
if (val)
diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h
index 0ff360d..d31e6cb 100644
--- a/include/linux/of_fdt.h
+++ b/include/linux/of_fdt.h
@@ -85,7 +85,7 @@ extern void unflatten_device_tree(void);
extern void unflatten_and_copy_device_tree(void);
extern void early_init_devtree(void *);
extern void early_get_first_memblock_info(void *, phys_addr_t *);
-extern u64 fdt_translate_address(const void *blob, int node_offset);
+extern u64 of_flat_dt_translate_address(unsigned long node);
extern void of_fdt_limit_memory(int limit);
#else /* CONFIG_OF_FLATTREE */
static inline void early_init_fdt_scan_reserved_mem(void) {}
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index c8e4e8f..675d36f 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -345,8 +345,7 @@ struct earlycon_id {
};

extern int setup_earlycon(char *buf);
-extern int of_setup_earlycon(unsigned long addr,
- const struct of_device_id *match,
+extern int of_setup_earlycon(const struct of_device_id *match,
unsigned long node,
const char *options);

--
2.3.1


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