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scripts/dts/extract: Add support for generating SPI GPIO CS defines

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Add support to generation script to generate defines for GPIO CS
[WIP], need to clarify some issues on how CS's look when we mix GPIO-CS
and HW CS.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
This commit is contained in:
Kumar Gala 2019-01-22 14:49:45 -06:00 • committed by Kumar Gala
commit f592c528f4
1 changed files with 21 additions and 0 deletions
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21
scripts/dts/extract/reg.py
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@ -28,12 +28,33 @@ class DTReg(DTDirective):
node = reduced[node_address]
node_compat = get_compat(node_address)
binding = get_binding(node_address)
reg = reduced[node_address]['props']['reg']
if type(reg) is not list: reg = [ reg, ]
(nr_address_cells, nr_size_cells) = get_addr_size_cells(node_address)
if 'parent' in binding:
bus = binding['parent']['bus']
if bus == 'spi':
cs_gpios = None
try:
cs_gpios = deepcopy(find_parent_prop(node_address, 'cs-gpios'))
except:
pass
if cs_gpios:
# Newer versions of dtc might have the property look like
# cs-gpios = <0x05 0x0d 0x00>, < 0x06 0x00 0x00>;
# So we need to flatten the list in that case
if isinstance(cs_gpios[0], list):
cs_gpios = [item for sublist in cs_gpios for item in sublist]
extract_controller(node_address, "cs-gpios", cs_gpios, reg[0], def_label, "cs-gpio", True)
extract_cells(node_address, "cs-gpios", cs_gpios, None, reg[0], def_label, "cs-gpio", True)
# generate defines
l_base = def_label.split('/')
l_addr = [convert_string_to_label("BASE_ADDRESS")]