netdev - Re: [PATCH v1 2/4] powerpc/mpc5xxx: Switch mpc5xxx_get_bus

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Date:   Wed, 4 May 2022 23:52:58 +0000
From:   Chris Packham <Chris.Packham@...iedtelesis.co.nz>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Sergey Shtylyov <s.shtylyov@....ru>,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Wolfram Sang <wsa@...nel.org>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-ide@...r.kernel.org" <linux-ide@...r.kernel.org>,
        "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
        "linux-can@...r.kernel.org" <linux-can@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-spi@...r.kernel.org" <linux-spi@...r.kernel.org>,
        "linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>
CC:     Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        "Anatolij Gustschin" <agust@...x.de>,
        Wolfgang Grandegger <wg@...ndegger.com>,
        "Eric Dumazet" <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        "Pantelis Antoniou" <pantelis.antoniou@...il.com>,
        Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH v1 2/4] powerpc/mpc5xxx: Switch
 mpc5xxx_get_bus_frequency() to use fwnode


On 5/05/22 01:44, Andy Shevchenko wrote:
> 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@...ux.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(-)
<snip>
> diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c
> index 6c698c10d3cd..2030668ecde5 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 = of_fwnode_handle(node);

I think you mean

+       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;
>   }
>