Hi, On Monday 30 June 2014 06:39 PM, Antoine Ténart wrote: > The Berlin SoC has a two SATA ports. Add a PHY driver to handle them. > > The mode selection can let us think this PHY can be configured to fit > other purposes. But there are reasons to think the SATA mode will be > the only one usable: the PHY registers are only accessible indirectly > through two registers in the SATA range, the PHY seems to be integrated > and no information tells us the contrary. For these reasons, make the > driver a SATA PHY driver. > > Signed-off-by: Antoine Ténart <antoine.tenart@xxxxxxxxxxxxxxxxxx> > --- > drivers/phy/Kconfig | 7 ++ > drivers/phy/Makefile | 1 + > drivers/phy/phy-berlin-sata.c | 262 ++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 270 insertions(+) > create mode 100644 drivers/phy/phy-berlin-sata.c > > diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig > index 16a2f067c242..365ad3651e1c 100644 > --- a/drivers/phy/Kconfig > +++ b/drivers/phy/Kconfig > @@ -15,6 +15,13 @@ config GENERIC_PHY > phy users can obtain reference to the PHY. All the users of this > framework should select this config. > > +config PHY_BERLIN_SATA > + tristate "Marvell Berlin SATA PHY driver" > + depends on ARCH_BERLIN && OF depends on HAS_IOMEM? > + select GENERIC_PHY > + help > + Enable this to support the SATA PHY on Marvell Berlin SoCs. > + > config PHY_EXYNOS_MIPI_VIDEO > tristate "S5P/EXYNOS SoC series MIPI CSI-2/DSI PHY driver" > depends on HAS_IOMEM > diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile > index b4f1d5770601..a137a2e23218 100644 > --- a/drivers/phy/Makefile > +++ b/drivers/phy/Makefile > @@ -3,6 +3,7 @@ > # > > obj-$(CONFIG_GENERIC_PHY) += phy-core.o > +obj-$(CONFIG_PHY_BERLIN_SATA) += phy-berlin-sata.o > obj-$(CONFIG_BCM_KONA_USB2_PHY) += phy-bcm-kona-usb2.o > obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o > obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o > diff --git a/drivers/phy/phy-berlin-sata.c b/drivers/phy/phy-berlin-sata.c > new file mode 100644 > index 000000000000..4446e93e6d82 > --- /dev/null > +++ b/drivers/phy/phy-berlin-sata.c > @@ -0,0 +1,262 @@ > +/* > + * Marvell Berlin SATA PHY driver > + * > + * Copyright (C) 2014 Marvell Technology Group Ltd. > + * > + * Antoine Ténart <antoine.tenart@xxxxxxxxxxxxxxxxxx> > + * > + * This file is licensed under the terms of the GNU General Public > + * License version 2. This program is licensed "as is" without any > + * warranty of any kind, whether express or implied. > + */ > + > +#include <linux/clk.h> > +#include <linux/module.h> > +#include <linux/phy/phy.h> > +#include <linux/io.h> > +#include <linux/platform_device.h> > + > +#define HOST_VSA_ADDR 0x0 > +#define HOST_VSA_DATA 0x4 > +#define PORT_SCR_CTL 0x2c > +#define PORT_VSR_ADDR 0x78 > +#define PORT_VSR_DATA 0x7c > + > +#define CONTROL_REGISTER 0x0 > +#define MBUS_SIZE_CONTROL 0x4 > + > +#define POWER_DOWN_PHY0 BIT(6) > +#define POWER_DOWN_PHY1 BIT(14) > +#define MBUS_WRITE_REQUEST_SIZE_128 (BIT(2) << 16) > +#define MBUS_READ_REQUEST_SIZE_128 (BIT(2) << 19) > + > +#define PHY_BASE 0x200 > + > +/* register 0x01 */ > +#define REF_FREF_SEL_25 BIT(0) > +#define PHY_MODE_SATA (0x0 << 5) > + > +/* register 0x02 */ > +#define USE_MAX_PLL_RATE BIT(12) > + > +/* register 0x23 */ > +#define DATA_BIT_WIDTH_10 (0x0 << 10) > +#define DATA_BIT_WIDTH_20 (0x1 << 10) > +#define DATA_BIT_WIDTH_40 (0x2 << 10) > + > +/* register 0x25 */ > +#define PHY_GEN_MAX_1_5 (0x0 << 10) > +#define PHY_GEN_MAX_3_0 (0x1 << 10) > +#define PHY_GEN_MAX_6_0 (0x2 << 10) > + > +#define BERLIN_SATA_PHY_NB 2 > + > +#define to_berlin_sata_phy_priv(desc) \ > + container_of((desc), struct phy_berlin_priv, phys[(desc)->index]) You can get rid of this and use dev_get_drvdata(phy->dev->parent); > + > +struct phy_berlin_desc { > + struct phy *phy; > + u32 power_bit; > + unsigned index; > +}; > + > +struct phy_berlin_priv { > + void __iomem *base; > + spinlock_t lock; > + struct clk *clk; > + struct phy_berlin_desc phys[BERLIN_SATA_PHY_NB]; Avoid using fixed array sizes for ports or channels. Refer [1]. [1] -> http://www.spinics.net/lists/linux-sh/msg33350.html Thanks Kishon -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html