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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org On Sun, Sep 08, 2019 at 01:42:56PM +0000, Neil Armstrong wrote: > This adds extended PCIe PHY functions for the Amlogic G12A > USB3+PCIE Combo PHY to support reset, power_on and power_off for > PCIe exclusively. > > With these callbacks, we can handle all the needed operations of the > Amlogic PCIe controller driver. > > Signed-off-by: Neil Armstrong > --- > .../phy/amlogic/phy-meson-g12a-usb3-pcie.c | 70 ++++++++++++++++--- > 1 file changed, 61 insertions(+), 9 deletions(-) > > diff --git a/drivers/phy/amlogic/phy-meson-g12a-usb3-pcie.c b/drivers/phy/amlogic/phy-meson-g12a-usb3-pcie.c > index ac322d643c7a..08e322789e59 100644 > --- a/drivers/phy/amlogic/phy-meson-g12a-usb3-pcie.c > +++ b/drivers/phy/amlogic/phy-meson-g12a-usb3-pcie.c > @@ -50,6 +50,8 @@ > #define PHY_R5_PHY_CR_ACK BIT(16) > #define PHY_R5_PHY_BS_OUT BIT(17) > > +#define PCIE_RESET_DELAY 500 > + > struct phy_g12a_usb3_pcie_priv { > struct regmap *regmap; > struct regmap *regmap_cr; > @@ -196,6 +198,10 @@ static int phy_g12a_usb3_init(struct phy *phy) > struct phy_g12a_usb3_pcie_priv *priv = phy_get_drvdata(phy); > int data, ret; > > + ret = reset_control_reset(priv->reset); > + if (ret) > + return ret; > + Right, so we've moved this to apply to USB only, thus assuming PCI will call .reset for its reset (why the asymmetry?). Thanks, Andrew Murray > /* Switch PHY to USB3 */ > /* TODO figure out how to handle when PCIe was set in the bootloader */ > regmap_update_bits(priv->regmap, PHY_R0, > @@ -272,24 +278,64 @@ static int phy_g12a_usb3_init(struct phy *phy) > return 0; > } > > -static int phy_g12a_usb3_pcie_init(struct phy *phy) > +static int phy_g12a_usb3_pcie_power_on(struct phy *phy) > +{ > + struct phy_g12a_usb3_pcie_priv *priv = phy_get_drvdata(phy); > + > + if (priv->mode == PHY_TYPE_USB3) > + return 0; > + > + regmap_update_bits(priv->regmap, PHY_R0, > + PHY_R0_PCIE_POWER_STATE, > + FIELD_PREP(PHY_R0_PCIE_POWER_STATE, 0x1c)); > + > + return 0; > +} > + > +static int phy_g12a_usb3_pcie_power_off(struct phy *phy) > +{ > + struct phy_g12a_usb3_pcie_priv *priv = phy_get_drvdata(phy); > + > + if (priv->mode == PHY_TYPE_USB3) > + return 0; > + > + regmap_update_bits(priv->regmap, PHY_R0, > + PHY_R0_PCIE_POWER_STATE, > + FIELD_PREP(PHY_R0_PCIE_POWER_STATE, 0x1d)); > + > + return 0; > +} > + > +static int phy_g12a_usb3_pcie_reset(struct phy *phy) > { > struct phy_g12a_usb3_pcie_priv *priv = phy_get_drvdata(phy); > int ret; > > - ret = reset_control_reset(priv->reset); > + if (priv->mode == PHY_TYPE_USB3) > + return 0; > + > + ret = reset_control_assert(priv->reset); > if (ret) > return ret; > > + udelay(PCIE_RESET_DELAY); > + > + ret = reset_control_deassert(priv->reset); > + if (ret) > + return ret; > + > + udelay(PCIE_RESET_DELAY); > + > + return 0; > +} > + > +static int phy_g12a_usb3_pcie_init(struct phy *phy) > +{ > + struct phy_g12a_usb3_pcie_priv *priv = phy_get_drvdata(phy); > + > if (priv->mode == PHY_TYPE_USB3) > return phy_g12a_usb3_init(phy); > > - /* Power UP PCIE */ > - /* TODO figure out when the bootloader has set USB3 mode before */ > - regmap_update_bits(priv->regmap, PHY_R0, > - PHY_R0_PCIE_POWER_STATE, > - FIELD_PREP(PHY_R0_PCIE_POWER_STATE, 0x1c)); > - > return 0; > } > > @@ -297,7 +343,10 @@ static int phy_g12a_usb3_pcie_exit(struct phy *phy) > { > struct phy_g12a_usb3_pcie_priv *priv = phy_get_drvdata(phy); > > - return reset_control_reset(priv->reset); > + if (priv->mode == PHY_TYPE_USB3) > + return reset_control_reset(priv->reset); > + > + return 0; > } > > static struct phy *phy_g12a_usb3_pcie_xlate(struct device *dev, > @@ -326,6 +375,9 @@ static struct phy *phy_g12a_usb3_pcie_xlate(struct device *dev, > static const struct phy_ops phy_g12a_usb3_pcie_ops = { > .init = phy_g12a_usb3_pcie_init, > .exit = phy_g12a_usb3_pcie_exit, > + .power_on = phy_g12a_usb3_pcie_power_on, > + .power_off = phy_g12a_usb3_pcie_power_off, > + .reset = phy_g12a_usb3_pcie_reset, > .owner = THIS_MODULE, > }; > > -- > 2.17.1 > _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic