mirror of
https://github.com/torvalds/linux
synced 2024-07-22 19:21:07 +00:00
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
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/export.h>
|
|
#include <linux/property.h>
|
|
|
|
#include <asm/mpc5xxx.h>
|
|
|
|
/**
|
|
* mpc5xxx_fwnode_get_bus_frequency - Find the bus frequency for a firmware node
|
|
* @fwnode: firmware node
|
|
*
|
|
* Returns bus frequency (IPS on MPC512x, IPB on MPC52xx),
|
|
* or 0 if the bus frequency cannot be found.
|
|
*/
|
|
unsigned long mpc5xxx_fwnode_get_bus_frequency(struct fwnode_handle *fwnode)
|
|
{
|
|
struct fwnode_handle *parent;
|
|
u32 bus_freq;
|
|
int ret;
|
|
|
|
ret = fwnode_property_read_u32(fwnode, "bus-frequency", &bus_freq);
|
|
if (!ret)
|
|
return bus_freq;
|
|
|
|
fwnode_for_each_parent_node(fwnode, parent) {
|
|
ret = fwnode_property_read_u32(parent, "bus-frequency", &bus_freq);
|
|
if (!ret)
|
|
return bus_freq;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(mpc5xxx_fwnode_get_bus_frequency);
|