471d2f3a0a
For devices on buses like I2C or SPI its possible that a sensor might
support being on either bus type. In the dts we can tell this by
looking at the parent bus of the device. Its useful for a driver to
know this so can we build support into the driver accordingly.
For example if the LSM6DSL sensor ("st,lsm6dsl") is in the dts on a spi
bus we now generate:
#define DT_ST_LPS22HB_PRESS_BUS_SPI 1
Its possible that a system exists in which multiple of the same sensor
exist but on different busses, so drivers should handle that case
accordingly. For the LSM6DSL example we'd end up with:
#define DT_ST_LPS22HB_PRESS_BUS_I2C 1
#define DT_ST_LPS22HB_PRESS_BUS_SPI 1
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
61 lines
1.7 KiB
Python
61 lines
1.7 KiB
Python
#
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# Copyright (c) 2018 Bobby Noelte
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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from extract.globals import *
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from extract.directive import DTDirective
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##
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# @brief Manage compatible directives.
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#
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# Handles:
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# - compatible
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#
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class DTCompatible(DTDirective):
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def __init__(self):
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pass
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##
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# @brief Extract compatible
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#
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# @param node_address Address of node owning the
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# compatible definition.
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# @param prop compatible property name
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# @param def_label Define label string of node owning the
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# compatible definition.
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#
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def extract(self, node_address, prop, def_label):
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# compatible definition
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binding = get_binding(node_address)
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compatible = reduced[node_address]['props'][prop]
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if not isinstance(compatible, list):
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compatible = [compatible, ]
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for i, comp in enumerate(compatible):
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# Generate #define's
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compat_label = convert_string_to_label(str(comp))
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compat_defs = 'DT_COMPAT_' + compat_label
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load_defs = {
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compat_defs: "1",
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}
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insert_defs(node_address, load_defs, {})
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# Generate #define for BUS a "sensor" might be on
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# for example:
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# #define DT_ST_LPS22HB_PRESS_BUS_SPI 1
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if 'parent' in binding:
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bus = binding['parent']['bus']
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compat_defs = 'DT_' + compat_label + '_BUS_' + bus.upper()
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load_defs = {
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compat_defs: "1",
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}
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insert_defs(node_address, load_defs, {})
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##
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# @brief Management information for compatible.
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compatible = DTCompatible()
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