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de06fba62a
Switch mpc5xxx_get_bus_frequency() to use fwnode in order to help cleaning up other parts of the kernel from OF specific code. No functional change intended. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Chris Packham <chris.packham@alliedtelesis.co.nz> # for i2c-mpc Acked-by: Wolfram Sang <wsa@kernel.org> # for the I2C part Acked-by: Mark Brown <broonie@kernel.org> Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> # for mscan/mpc5xxx_can Acked-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220507100147.5802-2-andriy.shevchenko@linux.intel.com
35 lines
818 B
C
35 lines
818 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/kernel.h>
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#include <linux/export.h>
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#include <linux/property.h>
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#include <asm/mpc5xxx.h>
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/**
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* mpc5xxx_fwnode_get_bus_frequency - Find the bus frequency for a firmware node
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* @fwnode: firmware node
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*
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* Returns bus frequency (IPS on MPC512x, IPB on MPC52xx),
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* or 0 if the bus frequency cannot be found.
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*/
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unsigned long mpc5xxx_fwnode_get_bus_frequency(struct fwnode_handle *fwnode)
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{
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struct fwnode_handle *parent;
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u32 bus_freq;
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int ret;
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ret = fwnode_property_read_u32(fwnode, "bus-frequency", &bus_freq);
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if (!ret)
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return bus_freq;
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fwnode_for_each_parent_node(fwnode, parent) {
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ret = fwnode_property_read_u32(parent, "bus-frequency", &bus_freq);
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if (!ret)
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return bus_freq;
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}
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return 0;
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}
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EXPORT_SYMBOL(mpc5xxx_fwnode_get_bus_frequency);
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