linux-kernel - Re: [PATCH net-next v2 6/6] net: phy: microchip_t1s: add support for Microchip LAN865x Rev.B0 PHYs

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Message-ID: <ZGuD/dqpQl/2wpRY@corigine.com>
Date:   Mon, 22 May 2023 17:02:21 +0200
From:   Simon Horman <simon.horman@...igine.com>
To:     Parthiban Veerasooran <Parthiban.Veerasooran@...rochip.com>
Cc:     andrew@...n.ch, hkallweit1@...il.com, linux@...linux.org.uk,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, ramon.nordin.rodriguez@...roamp.se,
        horatiu.vultur@...rochip.com, Woojung.Huh@...rochip.com,
        Nicolas.Ferre@...rochip.com, Thorsten.Kummermehr@...rochip.com
Subject: Re: [PATCH net-next v2 6/6] net: phy: microchip_t1s: add support for
 Microchip LAN865x Rev.B0 PHYs

On Mon, May 22, 2023 at 05:03:31PM +0530, Parthiban Veerasooran wrote:
> Add support for the Microchip LAN865x Rev.B0 10BASE-T1S Internal PHYs
> (LAN8650/1). The LAN865x combines a Media Access Controller (MAC) and an
> internal 10BASE-T1S Ethernet PHY to access 10BASE‑T1S networks. As
> LAN867X and LAN865X are using the same function for the read_status,
> rename the function as lan86xx_read_status.
> 
> Signed-off-by: Parthiban Veerasooran <Parthiban.Veerasooran@...rochip.com>

Hi Parthiban,

thanks for your patch.
Some minor nits from my side.

...

> +/* This is pulled straigt from AN1760 from 'calulation of offset 1' &
> + * 'calculation of offset 2'
> + */

nit: s/straigt/straight/

> +static int lan865x_generate_cfg_offsets(struct phy_device *phydev, s8 offsets[2])
> +{
> +	const u16 fixup_regs[2] = {0x0004, 0x0008};
> +	int ret;
> +
> +	for (int i = 0; i < ARRAY_SIZE(fixup_regs); i++) {
> +		ret = lan865x_revb0_indirect_read(phydev, fixup_regs[i]);
> +		if (ret < 0)
> +			return ret;
> +		if (ret & BIT(4))
> +			offsets[i] = ret | 0xE0;
> +		else
> +			offsets[i] = ret;
> +	}
> +
> +	return 0;
> +}

...

> +static int lan865x_setup_cfgparam(struct phy_device *phydev)
> +{
> +	u16 cfg_results[5];
> +	u16 cfg_params[ARRAY_SIZE(lan865x_revb0_fixup_cfg_regs)];
> +	s8 offsets[2];
> +	int ret;

nit: Please use reverse xmas tree order - longest line to shortest -
     for local variable declarations in networking code.

...