From de06fba62af64144aca6f8a8bedbc848d2e5b440 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Sat, 7 May 2022 13:01:45 +0300 Subject: [PATCH] powerpc/mpc5xxx: Switch mpc5xxx_get_bus_frequency() to use fwnode 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 Acked-by: Chris Packham # for i2c-mpc Acked-by: Wolfram Sang # for the I2C part Acked-by: Mark Brown Acked-by: Marc Kleine-Budde # for mscan/mpc5xxx_can Acked-by: Damien Le Moal Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220507100147.5802-2-andriy.shevchenko@linux.intel.com --- arch/powerpc/include/asm/mpc5xxx.h | 9 +++- arch/powerpc/platforms/52xx/mpc52xx_gpt.c | 2 +- arch/powerpc/sysdev/mpc5xxx_clocks.c | 41 ++++++++++--------- drivers/ata/pata_mpc52xx.c | 2 +- drivers/i2c/busses/i2c-mpc.c | 7 ++-- drivers/net/can/mscan/mpc5xxx_can.c | 2 +- drivers/net/ethernet/freescale/fec_mpc52xx.c | 2 +- .../net/ethernet/freescale/fec_mpc52xx_phy.c | 3 +- .../net/ethernet/freescale/fs_enet/mii-fec.c | 4 +- drivers/spi/spi-mpc52xx.c | 2 +- drivers/tty/serial/mpc52xx_uart.c | 4 +- 11 files changed, 44 insertions(+), 34 deletions(-) diff --git a/arch/powerpc/include/asm/mpc5xxx.h b/arch/powerpc/include/asm/mpc5xxx.h index 2f60f5c5461b..44db26380435 100644 --- a/arch/powerpc/include/asm/mpc5xxx.h +++ b/arch/powerpc/include/asm/mpc5xxx.h @@ -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 + +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__ */ diff --git a/arch/powerpc/platforms/52xx/mpc52xx_gpt.c b/arch/powerpc/platforms/52xx/mpc52xx_gpt.c index 968f5b727273..76ece6001cdf 100644 --- a/arch/powerpc/platforms/52xx/mpc52xx_gpt.c +++ b/arch/powerpc/platforms/52xx/mpc52xx_gpt.c @@ -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; diff --git a/arch/powerpc/sysdev/mpc5xxx_clocks.c b/arch/powerpc/sysdev/mpc5xxx_clocks.c index 834a6d7fbd88..c5bf7e1b3780 100644 --- a/arch/powerpc/sysdev/mpc5xxx_clocks.c +++ b/arch/powerpc/sysdev/mpc5xxx_clocks.c @@ -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 -#include #include +#include + #include -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); diff --git a/drivers/ata/pata_mpc52xx.c b/drivers/ata/pata_mpc52xx.c index 03b6ae37a578..6559b606736d 100644 --- a/drivers/ata/pata_mpc52xx.c +++ b/drivers/ata/pata_mpc52xx.c @@ -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; diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c index 6c698c10d3cd..81ac92bb4f6f 100644 --- a/drivers/i2c/busses/i2c-mpc.c +++ b/drivers/i2c/busses/i2c-mpc.c @@ -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; } diff --git a/drivers/net/can/mscan/mpc5xxx_can.c b/drivers/net/can/mscan/mpc5xxx_can.c index 65ba6697bd7d..c469b2f3e57d 100644 --- a/drivers/net/can/mscan/mpc5xxx_can.c +++ b/drivers/net/can/mscan/mpc5xxx_can.c @@ -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; diff --git a/drivers/net/ethernet/freescale/fec_mpc52xx.c b/drivers/net/ethernet/freescale/fec_mpc52xx.c index 5ddb769bdfb4..a7f4c3c29f3e 100644 --- a/drivers/net/ethernet/freescale/fec_mpc52xx.c +++ b/drivers/net/ethernet/freescale/fec_mpc52xx.c @@ -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); diff --git a/drivers/net/ethernet/freescale/fec_mpc52xx_phy.c b/drivers/net/ethernet/freescale/fec_mpc52xx_phy.c index f85b5e81dfc1..95f778cce98c 100644 --- a/drivers/net/ethernet/freescale/fec_mpc52xx_phy.c +++ b/drivers/net/ethernet/freescale/fec_mpc52xx_phy.c @@ -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) diff --git a/drivers/net/ethernet/freescale/fs_enet/mii-fec.c b/drivers/net/ethernet/freescale/fs_enet/mii-fec.c index 152f4d83765a..d37d7a19a759 100644 --- a/drivers/net/ethernet/freescale/fs_enet/mii-fec.c +++ b/drivers/net/ethernet/freescale/fs_enet/mii-fec.c @@ -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"); diff --git a/drivers/spi/spi-mpc52xx.c b/drivers/spi/spi-mpc52xx.c index 3ebdce804b90..bc5e36fd4288 100644 --- a/drivers/spi/spi-mpc52xx.c +++ b/drivers/spi/spi-mpc52xx.c @@ -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; diff --git a/drivers/tty/serial/mpc52xx_uart.c b/drivers/tty/serial/mpc52xx_uart.c index e50f069b5ebb..3f1986c89694 100644 --- a/drivers/tty/serial/mpc52xx_uart.c +++ b/drivers/tty/serial/mpc52xx_uart.c @@ -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;