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Date: Mon, 24 Aug 2015 01:45:33 +0300
From: Alexey Klimov <klimov.linux@...il.com>
To: Alim Akhtar <alim.akhtar@...sung.com>
Cc: linux-scsi@...r.kernel.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
vinholikatti@...il.com, JBottomley@...n.com,
Seungwon Jeon <tgih.jun@...sung.com>,
Kishon Vijay Abraham I <kishon@...com>
Subject: Re: [PATCH 01/10] phy: exynos-ufs: add UFS PHY driver for EXYNOS SoC
Hi Alim,
On Fri, Aug 21, 2015 at 12:27 PM, Alim Akhtar <alim.akhtar@...sung.com> wrote:
> From: Seungwon Jeon <tgih.jun@...sung.com>
>
> This patch introduces Exynos UFS PHY driver. This driver
> supports to deal with phy calibration and power control
> according to UFS host driver's behavior.
>
> Signed-off-by: Seungwon Jeon <tgih.jun@...sung.com>
> Signed-off-by: Alim Akhtar <alim.akhtar@...sung.com>
> Cc: Kishon Vijay Abraham I <kishon@...com>
> ---
> .../devicetree/bindings/phy/samsung-phy.txt | 22 ++
> drivers/phy/Kconfig | 7 +
> drivers/phy/Makefile | 1 +
> drivers/phy/phy-exynos-ufs.c | 277 ++++++++++++++++++++
> drivers/phy/phy-exynos-ufs.h | 73 ++++++
> drivers/phy/phy-exynos7-ufs.h | 89 +++++++
> include/linux/phy/phy-exynos-ufs.h | 107 ++++++++
> 7 files changed, 576 insertions(+)
> create mode 100644 drivers/phy/phy-exynos-ufs.c
> create mode 100644 drivers/phy/phy-exynos-ufs.h
> create mode 100644 drivers/phy/phy-exynos7-ufs.h
> create mode 100644 include/linux/phy/phy-exynos-ufs.h
>
> diff --git a/Documentation/devicetree/bindings/phy/samsung-phy.txt b/Documentation/devicetree/bindings/phy/samsung-phy.txt
> index 60c6f2a..1abe2c4 100644
> --- a/Documentation/devicetree/bindings/phy/samsung-phy.txt
> +++ b/Documentation/devicetree/bindings/phy/samsung-phy.txt
> @@ -174,3 +174,25 @@ Example:
> usbdrdphy0 = &usb3_phy0;
> usbdrdphy1 = &usb3_phy1;
> };
> +
> +Samsung Exynos7 soc serise UFS PHY Controller
> +---------------------------------------------
> +
> +UFS PHY nodes are defined to describe on-chip UFS Physical layer controllers.
> +Each UFS PHY controller should have its own node.
> +
> +Required properties:
> +- compatible : compatible list, contains "samsung,exynos7-ufs-phy"
> +- reg : offset and length of the UFS PHY register set;
> +- reg-names : reg name(s) must be 'phy-pma';
> +- #phy-cells : must be zero
> +- samsung,syscon-phandle : a phandle to the PMU system controller, no arguments
> +
> +Example:
> + ufs_phy: ufs-phy@...5571800 {
> + compatible = "samsung,exynos7-ufs-phy";
> + reg = <0x15571800 0x240>;
> + reg-names = "phy-pma";
> + samsung,syscon-phandle = <&pmu_system_controller>;
> + #phy-cells = <0>;
> + };
> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
> index 6b8dd16..7449376 100644
> --- a/drivers/phy/Kconfig
> +++ b/drivers/phy/Kconfig
> @@ -358,4 +358,11 @@ config PHY_BRCMSTB_SATA
> Enable this to support the SATA3 PHY on 28nm Broadcom STB SoCs.
> Likely useful only with CONFIG_SATA_BRCMSTB enabled.
>
> +config PHY_EXYNOS_UFS
> + tristate "EXYNOS SoC series UFS PHY driver"
> + depends on OF && ARCH_EXYNOS
> + select GENERIC_PHY
> + help
> + Support for UFS PHY on Samsung EXYNOS chipsets.
> +
> endmenu
> diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
> index f344e1b..7a36818 100644
> --- a/drivers/phy/Makefile
> +++ b/drivers/phy/Makefile
> @@ -45,3 +45,4 @@ obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs-qmp-14nm.o
> obj-$(CONFIG_PHY_TUSB1210) += phy-tusb1210.o
> obj-$(CONFIG_PHY_BRCMSTB_SATA) += phy-brcmstb-sata.o
> obj-$(CONFIG_PHY_PISTACHIO_USB) += phy-pistachio-usb.o
> +obj-$(CONFIG_PHY_EXYNOS_UFS) += phy-exynos-ufs.o
> diff --git a/drivers/phy/phy-exynos-ufs.c b/drivers/phy/phy-exynos-ufs.c
> new file mode 100644
> index 0000000..840375d
> --- /dev/null
> +++ b/drivers/phy/phy-exynos-ufs.c
> @@ -0,0 +1,277 @@
> +/*
> + * UFS PHY driver for Samsung EXYNOS SoC
> + *
> + * Copyright (C) 2015 Samsung Electronics Co., Ltd.
> + * Author: Seungwon Jeon <tgih.jun@...sung.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + */
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/of.h>
> +#include <linux/io.h>
> +#include <linux/err.h>
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/phy/phy.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/regmap.h>
> +#include <linux/iopoll.h>
> +#include <linux/phy/phy-exynos-ufs.h>
What do you think about sorting this?
> +#include "phy-exynos-ufs.h"
> +
> +#define for_each_phy_lane(phy, i) \
> + for (i = 0; i < (phy)->lane_cnt; i++)
> +#define for_each_phy_cfg(cfg) \
> + for (; (cfg)->id; (cfg)++)
> +
> +#define phy_pma_writel(phy, val, reg) \
> + writel((val), (phy)->reg_pma + (reg))
> +#define phy_pma_readl(phy, reg) \
> + readl((phy)->reg_pma + (reg))
> +
> +#define PHY_DEF_LANE_CNT 1
> +
> +static inline struct exynos_ufs_phy *get_exynos_ufs_phy(struct phy *phy)
> +{
> + return (struct exynos_ufs_phy *)phy_get_drvdata(phy);
> +}
Let compiler decide when to inline static function.
Please don't make static inline functions in *.c files.
Thanks.
--
Best regards, Klimov Alexey
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