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powerpc/mpc5xxx: Switch mpc5xxx_get_bus_frequency() to use fwnode

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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
This commit is contained in:
Andy Shevchenko 2022-05-07 13:01:45 +03:00 committed by Michael Ellerman
parent 6d056b7254
commit de06fba62a
11 changed files with 44 additions and 34 deletions
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9
arch/powerpc/include/asm/mpc5xxx.h
View File

@ -11,7 +11,14 @@
#ifndef __ASM_POWERPC_MPC5xxx_H__
#define __ASM_POWERPC_MPC5xxx_H__
extern unsigned long mpc5xxx_get_bus_frequency(struct device_node *node);
#include <linux/property.h>
unsigned long mpc5xxx_fwnode_get_bus_frequency(struct fwnode_handle *fwnode);
static inline unsigned long mpc5xxx_get_bus_frequency(struct device *dev)
{
return mpc5xxx_fwnode_get_bus_frequency(dev_fwnode(dev));
}
#endif /* __ASM_POWERPC_MPC5xxx_H__ */

2
arch/powerpc/platforms/52xx/mpc52xx_gpt.c
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@ -722,7 +722,7 @@ static int mpc52xx_gpt_probe(struct platform_device *ofdev)
raw_spin_lock_init(&gpt->lock);
gpt->dev = &ofdev->dev;
gpt->ipb_freq = mpc5xxx_get_bus_frequency(ofdev->dev.of_node);
gpt->ipb_freq = mpc5xxx_get_bus_frequency(&ofdev->dev);
gpt->regs = of_iomap(ofdev->dev.of_node, 0);
if (!gpt->regs)
return -ENOMEM;

41
arch/powerpc/sysdev/mpc5xxx_clocks.c
View File

@ -1,31 +1,34 @@
// SPDX-License-Identifier: GPL-2.0
/**
* mpc5xxx_get_bus_frequency - Find the bus frequency for a device
* @node: device node
*
* Returns bus frequency (IPS on MPC512x, IPB on MPC52xx),
* or 0 if the bus frequency cannot be found.
*/
#include <linux/kernel.h>
#include <linux/of_platform.h>
#include <linux/export.h>
#include <linux/property.h>
#include <asm/mpc5xxx.h>
unsigned long mpc5xxx_get_bus_frequency(struct device_node *node)
/**
* 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)
{
const unsigned int *p_bus_freq = NULL;
struct fwnode_handle *parent;
u32 bus_freq;
int ret;
of_node_get(node);
while (node) {
p_bus_freq = of_get_property(node, "bus-frequency", NULL);
if (p_bus_freq)
break;
ret = fwnode_property_read_u32(fwnode, "bus-frequency", &bus_freq);
if (!ret)
return bus_freq;
node = of_get_next_parent(node);
fwnode_for_each_parent_node(fwnode, parent) {
ret = fwnode_property_read_u32(parent, "bus-frequency", &bus_freq);
if (!ret)
return bus_freq;
}
of_node_put(node);
return p_bus_freq ? *p_bus_freq : 0;
return 0;
}
EXPORT_SYMBOL(mpc5xxx_get_bus_frequency);
EXPORT_SYMBOL(mpc5xxx_fwnode_get_bus_frequency);

2
drivers/ata/pata_mpc52xx.c
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@ -683,7 +683,7 @@ static int mpc52xx_ata_probe(struct platform_device *op)
struct bcom_task *dmatsk;
/* Get ipb frequency */
ipb_freq = mpc5xxx_get_bus_frequency(op->dev.of_node);
ipb_freq = mpc5xxx_get_bus_frequency(&op->dev);
if (!ipb_freq) {
dev_err(&op->dev, "could not determine IPB bus frequency\n");
return -ENODEV;

7
drivers/i2c/busses/i2c-mpc.c
View File

@ -239,6 +239,7 @@ static const struct mpc_i2c_divider mpc_i2c_dividers_52xx[] = {
static int mpc_i2c_get_fdr_52xx(struct device_node *node, u32 clock,
u32 *real_clk)
{
struct fwnode_handle *fwnode = of_fwnode_handle(node);
const struct mpc_i2c_divider *div = NULL;
unsigned int pvr = mfspr(SPRN_PVR);
u32 divider;
@ -246,12 +247,12 @@ static int mpc_i2c_get_fdr_52xx(struct device_node *node, u32 clock,
if (clock == MPC_I2C_CLOCK_LEGACY) {
/* see below - default fdr = 0x3f -> div = 2048 */
*real_clk = mpc5xxx_get_bus_frequency(node) / 2048;
*real_clk = mpc5xxx_fwnode_get_bus_frequency(fwnode) / 2048;
return -EINVAL;
}
/* Determine divider value */
divider = mpc5xxx_get_bus_frequency(node) / clock;
divider = mpc5xxx_fwnode_get_bus_frequency(fwnode) / clock;
/*
* We want to choose an FDR/DFSR that generates an I2C bus speed that
@ -266,7 +267,7 @@ static int mpc_i2c_get_fdr_52xx(struct device_node *node, u32 clock,
break;
}
*real_clk = mpc5xxx_get_bus_frequency(node) / div->divider;
*real_clk = mpc5xxx_fwnode_get_bus_frequency(fwnode) / div->divider;
return (int)div->fdr;
}

2
drivers/net/can/mscan/mpc5xxx_can.c
View File

@ -63,7 +63,7 @@ static u32 mpc52xx_can_get_clock(struct platform_device *ofdev,
else
*mscan_clksrc = MSCAN_CLKSRC_XTAL;
freq = mpc5xxx_get_bus_frequency(ofdev->dev.of_node);
freq = mpc5xxx_get_bus_frequency(&ofdev->dev);
if (!freq)
return 0;

2
drivers/net/ethernet/freescale/fec_mpc52xx.c
View File

@ -924,7 +924,7 @@ static int mpc52xx_fec_probe(struct platform_device *op)
/* Start with safe defaults for link connection */
priv->speed = 100;
priv->duplex = DUPLEX_HALF;
priv->mdio_speed = ((mpc5xxx_get_bus_frequency(np) >> 20) / 5) << 1;
priv->mdio_speed = ((mpc5xxx_get_bus_frequency(&op->dev) >> 20) / 5) << 1;
/* The current speed preconfigures the speed of the MII link */
prop = of_get_property(np, "current-speed", &prop_size);

3
drivers/net/ethernet/freescale/fec_mpc52xx_phy.c
View File

@ -100,8 +100,7 @@ static int mpc52xx_fec_mdio_probe(struct platform_device *of)
dev_set_drvdata(dev, bus);
/* set MII speed */
out_be32(&priv->regs->mii_speed,
((mpc5xxx_get_bus_frequency(of->dev.of_node) >> 20) / 5) << 1);
out_be32(&priv->regs->mii_speed, ((mpc5xxx_get_bus_frequency(dev) >> 20) / 5) << 1);
err = of_mdiobus_register(bus, np);
if (err)

4
drivers/net/ethernet/freescale/fs_enet/mii-fec.c
View File

@ -102,7 +102,7 @@ static int fs_enet_mdio_probe(struct platform_device *ofdev)
struct resource res;
struct mii_bus *new_bus;
struct fec_info *fec;
int (*get_bus_freq)(struct device_node *);
int (*get_bus_freq)(struct device *);
int ret = -ENOMEM, clock, speed;
match = of_match_device(fs_enet_mdio_fec_match, &ofdev->dev);
@ -136,7 +136,7 @@ static int fs_enet_mdio_probe(struct platform_device *ofdev)
}
if (get_bus_freq) {
clock = get_bus_freq(ofdev->dev.of_node);
clock = get_bus_freq(&ofdev->dev);
if (!clock) {
/* Use maximum divider if clock is unknown */
dev_warn(&ofdev->dev, "could not determine IPS clock\n");

2
drivers/spi/spi-mpc52xx.c
View File

@ -437,7 +437,7 @@ static int mpc52xx_spi_probe(struct platform_device *op)
ms->irq0 = irq_of_parse_and_map(op->dev.of_node, 0);
ms->irq1 = irq_of_parse_and_map(op->dev.of_node, 1);
ms->state = mpc52xx_spi_fsmstate_idle;
ms->ipb_freq = mpc5xxx_get_bus_frequency(op->dev.of_node);
ms->ipb_freq = mpc5xxx_get_bus_frequency(&op->dev);
ms->gpio_cs_count = of_gpio_count(op->dev.of_node);
if (ms->gpio_cs_count > 0) {
master->num_chipselect = ms->gpio_cs_count;

4
drivers/tty/serial/mpc52xx_uart.c
View File

@ -1630,7 +1630,7 @@ mpc52xx_console_setup(struct console *co, char *options)
return ret;
}
uartclk = mpc5xxx_get_bus_frequency(np);
uartclk = mpc5xxx_fwnode_get_bus_frequency(of_fwnode_handle(np));
if (uartclk == 0) {
pr_debug("Could not find uart clock frequency!\n");
return -EINVAL;
@ -1747,7 +1747,7 @@ static int mpc52xx_uart_of_probe(struct platform_device *op)
/* set the uart clock to the input clock of the psc, the different
* prescalers are taken into account in the set_baudrate() methods
* of the respective chip */
uartclk = mpc5xxx_get_bus_frequency(op->dev.of_node);
uartclk = mpc5xxx_get_bus_frequency(&op->dev);
if (uartclk == 0) {
dev_dbg(&op->dev, "Could not find uart clock frequency!\n");
return -EINVAL;