linux-kernel - Re: [PATCH net-next v12 3/7] stmmac: dwmac-mediatek: re-arrange clock setting

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Date:   Tue, 18 Jan 2022 09:51:45 +0800
From:   Biao Huang <biao.huang@...iatek.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>
CC:     Matthias Brugger <matthias.bgg@...il.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        <netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <srv_heupstream@...iatek.com>, <macpaul.lin@...iatek.com>,
        <dkirjanov@...e.de>
Subject: Re: [PATCH net-next v12 3/7] stmmac: dwmac-mediatek: re-arrange
 clock setting

Dear Angelo,
	Thanks for your comments.
On Mon, 2022-01-17 at 11:38 +0100, AngeloGioacchino Del Regno wrote:
> Il 17/01/22 08:07, Biao Huang ha scritto:
> > The rmii_internal clock is needed only when PHY
> > interface is RMII, and reference clock is from MAC.
> > 
> > Re-arrange the clock setting as following:
> > 1. the optional "rmii_internal" is controlled by devm_clk_get(),
> > 2. other clocks still be configured by devm_clk_bulk_get().
> > 
> > Signed-off-by: Biao Huang <biao.huang@...iatek.com>
> > ---
> >   .../ethernet/stmicro/stmmac/dwmac-mediatek.c  | 72 +++++++++++++-
> > -----
> >   1 file changed, 49 insertions(+), 23 deletions(-)
> > 
> > diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
> > b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
> > index 8747aa4403e8..2678d2deb26a 100644
> > --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
> > +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
> > @@ -49,14 +49,15 @@ struct mac_delay_struct {
> >   struct mediatek_dwmac_plat_data {
> >   	const struct mediatek_dwmac_variant *variant;
> >   	struct mac_delay_struct mac_delay;
> > +	struct clk *rmii_internal_clk;
> >   	struct clk_bulk_data *clks;
> > -	struct device_node *np;
> >   	struct regmap *peri_regmap;
> > +	struct device_node *np;
> >   	struct device *dev;
> >   	phy_interface_t phy_mode;
> > -	int num_clks_to_config;
> >   	bool rmii_clk_from_mac;
> >   	bool rmii_rxc;
> > +	int num_clks;
> 
> I don't see any need to get a num_clks here, at this point: since all
> functions
> reading this are getting passed a pointer to this entire structure,
> you can
> simply always access plat->variant->num_clks.
> 
> Please, drop the addition of num_clks in this struct.
> 
> Regards,
> Angelo
OK, will remove it in next send.