target/linux/ar71xx/patches-4.14/002-add_back_gpio_function_select.patch

   1 --- /dev/null
   2 +++ b/arch/mips/ath79/gpio.c
   3 @@ -0,0 +1,59 @@
   4 +/*
   5 + *  Atheros AR71XX/AR724X/AR913X GPIO API support
   6 + *
   7 + *  Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com>
   8 + *  Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
   9 + *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
  10 + *
  11 + *  Parts of this file are based on Atheros' 2.6.15/2.6.31 BSP
  12 + *
  13 + *  This program is free software; you can redistribute it and/or modify it
  14 + *  under the terms of the GNU General Public License version 2 as published
  15 + *  by the Free Software Foundation.
  16 + */
  17 +#include <linux/kernel.h>
  18 +#include <linux/module.h>
  19 +#include <linux/io.h>
  20 +#include <linux/gpio.h>
  21 +#include <asm/mach-ath79/ar71xx_regs.h>
  22 +#include <asm/mach-ath79/ath79.h>
  23 +#include "common.h"
  24 +
  25 +void __iomem *ath79_gpio_base;
  26 +EXPORT_SYMBOL_GPL(ath79_gpio_base);
  27 +
  28 +static void __iomem *ath79_gpio_get_function_reg(void)
  29 +{
  30 +       u32 reg = 0;
  31 +
  32 +       if (soc_is_ar71xx() ||
  33 +           soc_is_ar724x() ||
  34 +           soc_is_ar913x() ||
  35 +           soc_is_ar933x())
  36 +               reg = AR71XX_GPIO_REG_FUNC;
  37 +       else if (soc_is_ar934x())
  38 +               reg = AR934X_GPIO_REG_FUNC;
  39 +       else
  40 +               BUG();
  41 +
  42 +       return ath79_gpio_base + reg;
  43 +}
  44 +
  45 +void ath79_gpio_function_setup(u32 set, u32 clear)
  46 +{
  47 +       void __iomem *reg = ath79_gpio_get_function_reg();
  48 +
  49 +       __raw_writel((__raw_readl(reg) & ~clear) | set, reg);
  50 +       /* flush write */
  51 +       __raw_readl(reg);
  52 +}
  53 +
  54 +void ath79_gpio_function_enable(u32 mask)
  55 +{
  56 +       ath79_gpio_function_setup(mask, 0);
  57 +}
  58 +
  59 +void ath79_gpio_function_disable(u32 mask)
  60 +{
  61 +       ath79_gpio_function_setup(0, mask);
  62 +}
  63 --- a/arch/mips/include/asm/mach-ath79/ath79.h
  64 +++ b/arch/mips/include/asm/mach-ath79/ath79.h
  65 @@ -118,6 +118,7 @@ static inline int soc_is_qca955x(void)
  66  void ath79_ddr_wb_flush(unsigned int reg);
  67  void ath79_ddr_set_pci_windows(void);
  68
  69 +extern void __iomem *ath79_gpio_base;
  70  extern void __iomem *ath79_pll_base;
  71  extern void __iomem *ath79_reset_base;
  72
  73 --- a/arch/mips/ath79/dev-common.c
  74 +++ b/arch/mips/ath79/dev-common.c
  75 @@ -156,4 +156,5 @@ void __init ath79_gpio_init(void)
  76         }
  77
  78         platform_device_register(&ath79_gpio_device);
  79 +       ath79_gpio_base = ioremap(AR71XX_GPIO_BASE, AR71XX_GPIO_SIZE);
  80  }
  81 --- a/arch/mips/ath79/common.h
  82 +++ b/arch/mips/ath79/common.h
  83 @@ -24,6 +24,9 @@ unsigned long ath79_get_sys_clk_rate(con
  84
  85  void ath79_ddr_ctrl_init(void);
  86
  87 +void ath79_gpio_function_enable(u32 mask);
  88 +void ath79_gpio_function_disable(u32 mask);
  89 +void ath79_gpio_function_setup(u32 set, u32 clear);
  90  void ath79_gpio_init(void);
  91
  92  #endif /* __ATH79_COMMON_H */