linux-kernel - Re: [PATCH v3 06/11] PCI: imx6: Make use of BIT() in constant definitions

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Date:   Fri, 12 Apr 2019 17:56:53 +0200
From:   Lucas Stach <l.stach@...gutronix.de>
To:     Andrey Smirnov <andrew.smirnov@...il.com>,
        linux-pci@...r.kernel.org
Cc:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Fabio Estevam <fabio.estevam@....com>,
        Chris Healy <cphealy@...il.com>,
        Leonard Crestez <leonard.crestez@....com>,
        "A.s. Dong" <aisheng.dong@....com>,
        Richard Zhu <hongxing.zhu@....com>, linux-imx@....com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 06/11] PCI: imx6: Make use of BIT() in constant
 definitions

Am Sonntag, den 31.03.2019, 21:25 -0700 schrieb Andrey Smirnov:
> Avoid using explicit left shifts and convert various definitions to
> use BIT() instead. No functional change intended.
> 
> > Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
> > Cc: Bjorn Helgaas <bhelgaas@...gle.com>
> > Cc: Fabio Estevam <fabio.estevam@....com>
> > Cc: Chris Healy <cphealy@...il.com>
> > Cc: Lucas Stach <l.stach@...gutronix.de>
> > Cc: Leonard Crestez <leonard.crestez@....com>
> > Cc: "A.s. Dong" <aisheng.dong@....com>
> > Cc: Richard Zhu <hongxing.zhu@....com>
> Cc: linux-imx@....com
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-kernel@...r.kernel.org
> Cc: linux-pci@...r.kernel.org
> Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>

Reviewed-by: Lucas Stach <l.stach@...gutronix.de>

> ---
>  drivers/pci/controller/dwc/pci-imx6.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> index bb95a3273ca2..b1f30b94fb30 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -118,14 +118,14 @@ struct imx6_pcie {
>  
>  /* PHY registers (not memory-mapped) */
> >  #define PCIE_PHY_ATEOVRD			0x10
> > -#define  PCIE_PHY_ATEOVRD_EN			(0x1 << 2)
> > +#define  PCIE_PHY_ATEOVRD_EN			BIT(2)
> >  #define  PCIE_PHY_ATEOVRD_REF_CLKDIV_SHIFT	0
> >  #define  PCIE_PHY_ATEOVRD_REF_CLKDIV_MASK	0x1
>  
> >  #define PCIE_PHY_MPLL_OVRD_IN_LO		0x11
> >  #define  PCIE_PHY_MPLL_MULTIPLIER_SHIFT		2
> >  #define  PCIE_PHY_MPLL_MULTIPLIER_MASK		0x7f
> > -#define  PCIE_PHY_MPLL_MULTIPLIER_OVRD		(0x1 << 9)
> > +#define  PCIE_PHY_MPLL_MULTIPLIER_OVRD		BIT(9)
>  
>  #define PCIE_PHY_RX_ASIC_OUT 0x100D
> >  #define PCIE_PHY_RX_ASIC_OUT_VALID	(1 << 0)
> @@ -148,8 +148,8 @@ struct imx6_pcie {
> >  #define PCIE_PHY_CMN_REG26_ATT_MODE	0xBC
>  
>  #define PHY_RX_OVRD_IN_LO 0x1005
> -#define PHY_RX_OVRD_IN_LO_RX_DATA_EN (1 << 5)
> -#define PHY_RX_OVRD_IN_LO_RX_PLL_EN (1 << 3)
> > +#define PHY_RX_OVRD_IN_LO_RX_DATA_EN		BIT(5)
> > +#define PHY_RX_OVRD_IN_LO_RX_PLL_EN		BIT(3)
>  
>  static int pcie_phy_poll_ack(struct imx6_pcie *imx6_pcie, int exp_val)
>  {