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Date: Thu, 04 Dec 2014 09:00:39 +0800
From: Kever Yang <kever.yang@...k-chips.com>
To: LiYunzhi <lyz@...k-chips.com>, ulrich.prinz@...glemail.com,
dianders <dianders@...omium.org>, heiko <heiko@...ech.de>,
huangtao <huangtao@...k-chips.com>, wulf <wulf@...k-chips.com>,
linux-usb@...r.kernel.org, kishon@...com,
linux-kernel@...r.kernel.org, zyw@...k-chips.com
Subject: Re: [PATCH] phy: add Rockchip RK3288 USB2 PHY driver.
Hi Roy,
Why you send two patches with different commit message but the same
change,
you should use V2 for a new patch.
On 12/03/2014 09:46 PM, LiYunzhi wrote:
> From: lyz <lyz@...k-chips.com>
You don't need the From for the patches from yourself.
>
> Add a driver for the Rockchip SoC internal USB2.0 PHY.
> This driver currently support RK3288.
>
> Signed-off-by: lyz <lyz@...k-chips.com>
Remember to use you Full name here for From/Signed-off-by
or all the kind of signature.
> ---
> .../devicetree/bindings/phy/rockchip-usb-phy.txt | 17 ++
The document should be in a separate patch, so please split this into
two patches.
> drivers/phy/Kconfig | 7 +
> drivers/phy/Makefile | 1 +
> drivers/phy/phy-rockchip-usb.c | 179 +++++++++++++++++++++
> 4 files changed, 204 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/phy/rockchip-usb-phy.txt
> create mode 100644 drivers/phy/phy-rockchip-usb.c
>
> diff --git a/Documentation/devicetree/bindings/phy/rockchip-usb-phy.txt b/Documentation/devicetree/bindings/phy/rockchip-usb-phy.txt
> new file mode 100644
> index 0000000..18ccc2f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/rockchip-usb-phy.txt
> @@ -0,0 +1,17 @@
> +ROCKCHIP USB2 PHY
> +
> +Required properties:
> + - compatible: rockchip,rk3288-usb-phy
> + - rockchip,grf : phandle to the syscon managing the "general
> + register files"
> + - #phy-cells: must be 1
> +Refer to phy/phy-bindings.txt for the generic PHY binding
> +properties
> +
> +Example:
> +
> + usbphy: phy {
> + #phy-cells = <1>;
> + compatible = "rockchip,rk3288-usb-phy";
> + rockchip,grf = <&grf>;
> + };
> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
> index 2a436e6..54ab088 100644
> --- a/drivers/phy/Kconfig
> +++ b/drivers/phy/Kconfig
> @@ -218,6 +218,13 @@ config PHY_QCOM_IPQ806X_SATA
> depends on OF
> select GENERIC_PHY
>
> +config PHY_ROCKCHIP_RK3288_USB2
> + tristate "Rockchip USB2 RK3288 PHY Driver"
> + depends on ARCH_ROCKCHIP && OF
> + select GENERIC_PHY
> + help
> + Enable this to support the Rockchip USB 2.0 PHY.
> +
> config PHY_ST_SPEAR1310_MIPHY
> tristate "ST SPEAR1310-MIPHY driver"
> select GENERIC_PHY
> diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
> index c4590fc..f4f2f79 100644
> --- a/drivers/phy/Makefile
> +++ b/drivers/phy/Makefile
> @@ -25,6 +25,7 @@ phy-exynos-usb2-$(CONFIG_PHY_EXYNOS5250_USB2) += phy-exynos5250-usb2.o
> phy-exynos-usb2-$(CONFIG_PHY_S5PV210_USB2) += phy-s5pv210-usb2.o
> obj-$(CONFIG_PHY_EXYNOS5_USBDRD) += phy-exynos5-usbdrd.o
> obj-$(CONFIG_PHY_QCOM_APQ8064_SATA) += phy-qcom-apq8064-sata.o
> +obj-$(CONFIG_PHY_ROCKCHIP_RK3288_USB2) += phy-rockchip-usb.o
Add this after 'CONFIG_PHY_QCOM_IPQ806X_SATA'.
> obj-$(CONFIG_PHY_QCOM_IPQ806X_SATA) += phy-qcom-ipq806x-sata.o
> obj-$(CONFIG_PHY_ST_SPEAR1310_MIPHY) += phy-spear1310-miphy.o
> obj-$(CONFIG_PHY_ST_SPEAR1340_MIPHY) += phy-spear1340-miphy.o
> diff --git a/drivers/phy/phy-rockchip-usb.c b/drivers/phy/phy-rockchip-usb.c
> new file mode 100644
> index 0000000..2586b76
> --- /dev/null
> +++ b/drivers/phy/phy-rockchip-usb.c
> @@ -0,0 +1,179 @@
> +/*
> + * Rockchip usb PHY driver
> + *
> + * Copyright (C) 2014 Roy Li <lyz@...k-chips.com>
> + * Copyright (C) 2014 ROCKCHIP, Inc.
> + *
> + * 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.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/io.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/mutex.h>
> +#include <linux/of.h>
> +#include <linux/of_address.h>
> +#include <linux/phy/phy.h>
> +#include <linux/platform_device.h>
> +#include <linux/regulator/consumer.h>
> +#include <linux/reset.h>
> +#include <linux/regmap.h>
> +#include <linux/mfd/syscon.h>
> +
> +#define ROCKCHIP_RK3288_UOC(n) (0x320 + n * 0x14)
> +
> +#define SIDDQ_MSK (1 << (13 + 16))
> +#define SIDDQ_ON (1 << 13)
> +#define SIDDQ_OFF (0 << 13)
> +
> +enum rk3288_phy_id {
> + RK3288_OTG,
> + RK3288_HOST0,
> + RK3288_HOST1,
> + RK3288_NUM_PHYS,
> +};
> +
> +struct rockchip_usb_phy {
> + struct regmap *reg_base;
> + unsigned int reg_offset;
> + struct clk *clk;
> + struct phy *phy;
> +};
> +
> +static int rockchip_usb_phy_power(struct rockchip_usb_phy *phy,
> + bool siddq)
> +{
> + return regmap_write(phy->reg_base, phy->reg_offset,
> + SIDDQ_MSK | (siddq ? SIDDQ_ON : SIDDQ_OFF));
> +}
> +
> +static int rockchip_usb_phy_power_off(struct phy *_phy)
> +{
> + struct rockchip_usb_phy *phy = phy_get_drvdata(_phy);
> + int ret = 0;
> +
> + /* Power down usb phy analog blocks by set siddq 1*/
> + ret = rockchip_usb_phy_power(phy, 1);
Use a MACRO like ON/OFF instead of 1/0?
and then we don't need the comment anymore.
> + if (ret)
> + return ret;
> +
> + clk_disable_unprepare(phy->clk);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int rockchip_usb_phy_power_on(struct phy *_phy)
> +{
> + struct rockchip_usb_phy *phy = phy_get_drvdata(_phy);
> + int ret = 0;
> +
> + ret = clk_prepare_enable(phy->clk);
> + if (ret)
> + return ret;
> +
> + /* Power up usb phy analog blocks by set siddq 0*/
> + ret = rockchip_usb_phy_power(phy, 0);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static struct phy *rockchip_usb_phy_xlate(struct device *dev,
> + struct of_phandle_args *args)
> +{
> + struct rockchip_usb_phy *phy_array = dev_get_drvdata(dev);
> +
> + if (WARN_ON(args->args[0] == 0 || args->args[0] >= RK3288_NUM_PHYS))
> + return ERR_PTR(-ENODEV);
> +
> + return (phy_array + args->args[0])->phy;
> +}
> +
> +static struct phy_ops ops = {
> + .power_on = rockchip_usb_phy_power_on,
> + .power_off = rockchip_usb_phy_power_off,
> + .owner = THIS_MODULE,
> +};
> +
> +static int rockchip_usb_phy_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct rockchip_usb_phy *rk_phy;
> + struct rockchip_usb_phy *phy_array;
> + struct phy_provider *phy_provider;
> + struct regmap *grf;
> + char clk_name[16];
> + int i;
> +
> + grf = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,grf");
> + if (IS_ERR(grf)) {
> + dev_err(&pdev->dev, "Missing rockchip,grf property\n");
> + return PTR_ERR(grf);
> + }
> +
> + phy_array = devm_kzalloc(dev, RK3288_NUM_PHYS * sizeof(*rk_phy),
> + GFP_KERNEL);
> + if (!phy_array)
> + return -ENOMEM;
> +
> + for (i = 0; i < RK3288_NUM_PHYS; i++) {
> + rk_phy = &phy_array[i];
> +
> + rk_phy->reg_base = grf;
> +
> + rk_phy->reg_offset = ROCKCHIP_RK3288_UOC(i);
> +
> + snprintf(clk_name, sizeof(clk_name), "usbphy%d", i);
> + rk_phy->clk = devm_clk_get(dev, clk_name);
> + if (IS_ERR(rk_phy->clk)) {
> + dev_warn(dev, "failed to get clock %s\n", clk_name);
> + rk_phy->clk = NULL;
> + }
> +
> + rk_phy->phy = devm_phy_create(dev, NULL, &ops, NULL);
> + if (IS_ERR(rk_phy->phy)) {
> + dev_err(dev, "failed to create PHY %d\n", i);
> + return PTR_ERR(rk_phy->phy);
> + }
> + phy_set_drvdata(rk_phy->phy, rk_phy);
> + }
> +
> + platform_set_drvdata(pdev, phy_array);
> +
> + phy_provider = devm_of_phy_provider_register(dev,
> + rockchip_usb_phy_xlate);
> + return PTR_ERR_OR_ZERO(phy_provider);
> +}
> +
> +static const struct of_device_id rockchip_usb_phy_dt_ids[] = {
> + { .compatible = "rockchip,rk3288-usb-phy" },
> + {}
> +};
> +
> +MODULE_DEVICE_TABLE(of, rockchip_usb_phy_dt_ids);
> +
> +static struct platform_driver rockchip_usb_driver = {
Maybe use rockchip_usb_phy_driver is better?
> + .probe = rockchip_usb_phy_probe,
> + .driver = {
> + .name = "rockchip-usb-phy",
> + .owner = THIS_MODULE,
> + .of_match_table = rockchip_usb_phy_dt_ids,
> + },
> +};
> +
> +module_platform_driver(rockchip_usb_driver);
> +
> +MODULE_AUTHOR("Roy Li <lyz@...k-chips.com>");
> +MODULE_DESCRIPTION("Rockchip USB 2.0 PHY driver");
> +MODULE_LICENSE("GPL v2");
--
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