On Wed, 2019-02-27 at 15:23 +0800, Stanley Chu wrote:
> Add UFS M-PHY driver on MediaTek chipsets.
>
> Signed-off-by: Stanley Chu <stanley.chu@xxxxxxxxxxxx>
> ---
> drivers/phy/mediatek/Kconfig | 9 ++
> drivers/phy/mediatek/Makefile | 1 +
> drivers/phy/mediatek/phy-mtk-ufs.c | 239 +++++++++++++++++++++++++++++
> 3 files changed, 249 insertions(+)
> create mode 100644 drivers/phy/mediatek/phy-mtk-ufs.c
>
> diff --git a/drivers/phy/mediatek/Kconfig b/drivers/phy/mediatek/Kconfig
> index 8857d00b3c65..4a20110a511d 100644
> --- a/drivers/phy/mediatek/Kconfig
> +++ b/drivers/phy/mediatek/Kconfig
> @@ -21,3 +21,12 @@ config PHY_MTK_XSPHY
> Enable this to support the SuperSpeedPlus XS-PHY transceiver for
> USB3.1 GEN2 controllers on MediaTek chips. The driver supports
> multiple USB2.0, USB3.1 GEN2 ports.
> +
> +config PHY_MTK_UFS
> + tristate "MediaTek UFS M-PHY driver"
Please sorting according to config name.
> + depends on ARCH_MEDIATEK && OF
> + select GENERIC_PHY
> + help
> + Support for UFS M-PHY on MediaTek chipsets. Enable this to provide
> + vendor-specific initialization, power on and off flow of specified
> + M-PHYs.
> diff --git a/drivers/phy/mediatek/Makefile b/drivers/phy/mediatek/Makefile
> index ee49edc97ee9..14e9aa0b8aa4 100644
> --- a/drivers/phy/mediatek/Makefile
> +++ b/drivers/phy/mediatek/Makefile
> @@ -5,3 +5,4 @@
>
> obj-$(CONFIG_PHY_MTK_TPHY) += phy-mtk-tphy.o
> obj-$(CONFIG_PHY_MTK_XSPHY) += phy-mtk-xsphy.o
> +obj-$(CONFIG_PHY_MTK_UFS) += phy-mtk-ufs.o
Same here.
> diff --git a/drivers/phy/mediatek/phy-mtk-ufs.c b/drivers/phy/mediatek/phy-mtk-ufs.c
> new file mode 100644
> index 000000000000..7375ad83af05
> --- /dev/null
> +++ b/drivers/phy/mediatek/phy-mtk-ufs.c
> @@ -0,0 +1,239 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2019 MediaTek Inc.
> + * Author: Stanley Chu <stanley.chu@xxxxxxxxxxxx>
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/phy/phy.h>
> +#include <linux/platform_device.h>
> +
> +/* mphy register and offsets */
> +#define MP_GLB_DIG_8C 0x008C
> +#define FRC_PLL_ISO_EN BIT(8)
> +#define PLL_ISO_EN BIT(9)
> +#define FRC_FRC_PWR_ON BIT(10)
> +#define PLL_PWR_ON BIT(11)
> +
> +#define MP_LN_DIG_RX_9C 0xA09C
> +#define FSM_DIFZ_FRC BIT(18)
> +
> +#define MP_LN_DIG_RX_AC 0xA0AC
> +#define FRC_RX_SQ_EN BIT(0)
> +#define RX_SQ_EN BIT(1)
> +
> +#define MP_LN_RX_44 0xB044
> +#define FRC_CDR_PWR_ON BIT(17)
> +#define CDR_PWR_ON BIT(18)
> +#define FRC_CDR_ISO_EN BIT(19)
> +#define CDR_ISO_EN BIT(20)
> +
> +#define mphy_readl(phy, ofs) readl((phy)->mmio + (ofs))
> +#define mphy_writel(phy, val, ofs) writel((val), (phy)->mmio + (ofs))
> +
> +struct ufs_mtk_phy {
> + struct device *dev;
> + void __iomem *mmio;
> + struct clk *mp_clk;
> + struct clk *unipro_clk;
> +};
> +
> +static inline void mphy_set_bit(struct ufs_mtk_phy *phy, u32 reg, u32 ofs)
Don't need to add inline, let compiler decide this.
> +{
> + u32 val;
> +
> + val = mphy_readl(phy, reg);
> + val |= ofs;
Value in ofs is bit value, not offset. Maybe need a better name.
Joe.C
