Hi, On Wednesday 08 January 2014 11:26 PM, Kamil Debski wrote: > Hi, > >> From: Kishon Vijay Abraham I [mailto:kis...@ti.com] >> Sent: Monday, January 06, 2014 11:12 AM >> >> Hi, >> >> On Friday 20 December 2013 06:54 PM, Kamil Debski wrote: >>> Add a new driver for the Exynos USB 2.0 PHY. The new driver uses the >>> generic PHY framework. The driver includes support for the Exynos >> 4x10 >>> and 4x12 SoC families. >>> >>> Signed-off-by: Kamil Debski <k.deb...@samsung.com> >>> Signed-off-by: Kyungmin Park <kyungmin.p...@samsung.com> >>> --- >>> .../devicetree/bindings/phy/samsung-phy.txt | 55 ++++ >>> drivers/phy/Kconfig | 29 ++ >>> drivers/phy/Makefile | 3 + >>> drivers/phy/phy-exynos4210-usb2.c | 257 >> ++++++++++++++++ >>> drivers/phy/phy-exynos4212-usb2.c | 306 >> ++++++++++++++++++++ >>> drivers/phy/phy-samsung-usb2.c | 226 >> +++++++++++++++ >>> drivers/phy/phy-samsung-usb2.h | 67 +++++ >>> 7 files changed, 943 insertions(+) >>> create mode 100644 drivers/phy/phy-exynos4210-usb2.c >>> create mode 100644 drivers/phy/phy-exynos4212-usb2.c >>> create mode 100644 drivers/phy/phy-samsung-usb2.c >>> create mode 100644 drivers/phy/phy-samsung-usb2.h >>> >> . >> . >> <snip> >> . >> . >> >>> diff --git a/drivers/phy/phy-samsung-usb2.h >>> b/drivers/phy/phy-samsung-usb2.h new file mode 100644 index >>> 0000000..ab89f91 >>> --- /dev/null >>> +++ b/drivers/phy/phy-samsung-usb2.h >>> @@ -0,0 +1,67 @@ >>> +/* >>> + * Samsung SoC USB 1.1/2.0 PHY driver >>> + * >>> + * Copyright (C) 2013 Samsung Electronics Co., Ltd. >>> + * Author: Kamil Debski <k.deb...@samsung.com> >>> + * >>> + * This program is free software; you can redistribute it and/or >>> +modify >>> + * it under the terms of the GNU General Public License version 2 as >>> + * published by the Free Software Foundation. >>> + */ >>> + >>> +#ifndef _PHY_EXYNOS_USB2_H >>> +#define _PHY_EXYNOS_USB2_H >>> + >>> +#include <linux/clk.h> >>> +#include <linux/phy/phy.h> >>> +#include <linux/device.h> >>> +#include <linux/regmap.h> >>> +#include <linux/spinlock.h> >>> + >>> +#define KHZ 1000 >>> +#define MHZ (KHZ * KHZ) >>> + >>> +struct samsung_usb2_phy_driver; >>> +struct samsung_usb2_phy_instance; >>> +struct samsung_usb2_phy_config; >>> + >>> +struct samsung_usb2_phy_instance { >>> + const struct samsung_usb2_common_phy *cfg; >>> + struct clk *clk; >>> + struct phy *phy; >>> + struct samsung_usb2_phy_driver *drv; >>> + unsigned long rate; >>> + u32 clk_reg_val; >>> + bool enabled; >>> +}; >>> + >>> +struct samsung_usb2_phy_driver { >>> + const struct samsung_usb2_phy_config *cfg; >>> + struct clk *clk; >>> + struct device *dev; >>> + void __iomem *reg_phy; >>> + struct regmap *reg_pmu; >>> + struct regmap *reg_sys; >>> + spinlock_t lock; >>> + struct samsung_usb2_phy_instance instances[0]; >> >> I think having instances as array here would allocate more space while >> allocating 'samsung_usb2_phy_driver' in 'samsung_usb2_phy_probe'. >> > > I am not sure if I understand you correctly here. Maybe I will explain > what I intended to write. An array with size 0 at the end of a structure > takes no space in the structure. The benefit of using it is that after > the structure one can allocate a number of the array elements and > address them easily. Another option would be placing pointer in the > samsung_usb2_phy_instance and allocate memory separately, but this would > involve two allocations and a pointer would be always present in the > structure.
Al-right.. makes sense. Thanks Kishon > > Best wishes, > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
