dm: core: Correctly read <ranges> of simple-bus
At present we decode simple bus <ranges> using the following assumption:
- parent #address-cells 1
- child #address-cells 1
- child #size-cells 1
However this might not always be the case.
Update to use fdt_addr_t and fdt_size_t in 'struct simple_bus_plat', and
use fdt_read_ranges() to correctly decode it according to the actual
parent and child #address-cells / #size-cells under a Kconfig option
CONFIG_SIMPLE_BUS_CORRECT_RANGE which can be turned on for any board
that needs it.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/drivers/core/Kconfig b/drivers/core/Kconfig
index 1eccac2..c7504ed 100644
--- a/drivers/core/Kconfig
+++ b/drivers/core/Kconfig
@@ -235,6 +235,19 @@
Supports the 'simple-bus' driver, which is used on some systems
in SPL.
+config SIMPLE_BUS_CORRECT_RANGE
+ bool "Decode the 'simple-bus' <range> by honoring the #address-cells and #size-cells"
+ depends on SIMPLE_BUS
+ help
+ Decoding the 'simple-bus' <range> by honoring the #address-cells
+ and #size-cells of parent/child bus. If unset, #address-cells of
+ parent bus is assumed to be 1, #address-cells and #size-cells of
+ child bus is also assumed to be 1, to save some spaces of using
+ an advanced API to decode the <range>, which benefits SPL image
+ builds that have size limits.
+
+ If you are unsure about this, Say N here.
+
config SIMPLE_PM_BUS
bool "Support simple-pm-bus driver"
depends on DM && OF_CONTROL && CLK && POWER_DOMAIN