Hi, On 21/12/2018 07:27, Andrey Smirnov wrote: > Convert various mult-bit fields to be defined using > GENMASK/FIELD_PREP. This way bit field boundaries are defined in a > single place only as well as defined in a way that makes it easier to > verify them against reference manual. No functional change intended. > > Cc: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx> > Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> > Cc: Fabio Estevam <fabio.estevam@xxxxxxx> > Cc: Chris Healy <cphealy@xxxxxxxxx> > Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx> > Cc: Leonard Crestez <leonard.crestez@xxxxxxx> > Cc: "A.s. Dong" <aisheng.dong@xxxxxxx> > Cc: Richard Zhu <hongxing.zhu@xxxxxxx> > Cc: linux-imx@xxxxxxx > Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > Cc: linux-kernel@xxxxxxxxxxxxxxx > Cc: linux-pci@xxxxxxxxxxxxxxx > Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx> > --- > drivers/pci/controller/dwc/pcie-designware.h | 29 +++++++++++--------- > 1 file changed, 16 insertions(+), 13 deletions(-) > > diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h > index 348e91b6daa2..0de653284fca 100644 > --- a/drivers/pci/controller/dwc/pcie-designware.h > +++ b/drivers/pci/controller/dwc/pcie-designware.h > @@ -11,6 +11,7 @@ > #ifndef _PCIE_DESIGNWARE_H > #define _PCIE_DESIGNWARE_H > > +#include <linux/bitfield.h> > #include <linux/dma-mapping.h> > #include <linux/irq.h> > #include <linux/msi.h> > @@ -30,11 +31,12 @@ > > /* Synopsys-specific PCIe configuration registers */ > #define PCIE_PORT_LINK_CONTROL 0x710 > -#define PORT_LINK_MODE_MASK (0x3f << 16) > -#define PORT_LINK_MODE_1_LANES (0x1 << 16) > -#define PORT_LINK_MODE_2_LANES (0x3 << 16) > -#define PORT_LINK_MODE_4_LANES (0x7 << 16) > -#define PORT_LINK_MODE_8_LANES (0xf << 16) > +#define PORT_LINK_MODE_MASK GENMASK(21, 16) > +#define PORT_LINK_MODE(n) FIELD_PREP(PORT_LINK_MODE_MASK, n) > +#define PORT_LINK_MODE_1_LANES PORT_LINK_MODE(0x1) > +#define PORT_LINK_MODE_2_LANES PORT_LINK_MODE(0x3) > +#define PORT_LINK_MODE_4_LANES PORT_LINK_MODE(0x7) > +#define PORT_LINK_MODE_8_LANES PORT_LINK_MODE(0xf) > > #define PCIE_PORT_DEBUG0 0x728 > #define PORT_LOGIC_LTSSM_STATE_MASK 0x1f > @@ -45,11 +47,12 @@ > > #define PCIE_LINK_WIDTH_SPEED_CONTROL 0x80C > #define PORT_LOGIC_SPEED_CHANGE BIT(17) > -#define PORT_LOGIC_LINK_WIDTH_MASK (0x1f << 8) > -#define PORT_LOGIC_LINK_WIDTH_1_LANES (0x1 << 8) > -#define PORT_LOGIC_LINK_WIDTH_2_LANES (0x2 << 8) > -#define PORT_LOGIC_LINK_WIDTH_4_LANES (0x4 << 8) > -#define PORT_LOGIC_LINK_WIDTH_8_LANES (0x8 << 8) > +#define PORT_LOGIC_LINK_WIDTH_MASK GENMASK(12, 8) > +#define PORT_LOGIC_LINK_WIDTH(n) FIELD_PREP(PORT_LOGIC_LINK_WIDTH_MASK, n) > +#define PORT_LOGIC_LINK_WIDTH_1_LANES PORT_LOGIC_LINK_WIDTH(0x1) > +#define PORT_LOGIC_LINK_WIDTH_2_LANES PORT_LOGIC_LINK_WIDTH(0x2) > +#define PORT_LOGIC_LINK_WIDTH_4_LANES PORT_LOGIC_LINK_WIDTH(0x4) > +#define PORT_LOGIC_LINK_WIDTH_8_LANES PORT_LOGIC_LINK_WIDTH(0x8) > > #define PCIE_MSI_ADDR_LO 0x820 > #define PCIE_MSI_ADDR_HI 0x824 > @@ -75,9 +78,9 @@ > #define PCIE_ATU_UPPER_BASE 0x910 > #define PCIE_ATU_LIMIT 0x914 > #define PCIE_ATU_LOWER_TARGET 0x918 > -#define PCIE_ATU_BUS(x) (((x) & 0xff) << 24) > -#define PCIE_ATU_DEV(x) (((x) & 0x1f) << 19) > -#define PCIE_ATU_FUNC(x) (((x) & 0x7) << 16) > +#define PCIE_ATU_BUS(x) FIELD_PREP(GENMASK(31, 24), x) > +#define PCIE_ATU_DEV(x) FIELD_PREP(GENMASK(23, 19), x) > +#define PCIE_ATU_FUNC(x) FIELD_PREP(GENMASK(18, 16), x) > #define PCIE_ATU_UPPER_TARGET 0x91C > > #define PCIE_MISC_CONTROL_1_OFF 0x8BC > I wasn't aware of the existence of FIELD_PREP(), seems to be quite handy :) Acked-by: Gustavo Pimentel <gustavo.pimentel@xxxxxxxxxxxx> Thanks.
