package/boot/uboot-suniv/patches/0010-introduce-and-use-sunxi_gpio_setup_dt_pins.patch

   1 From 9a0ca4a595f8129904432b67ad1fb7ee815f3d67 Mon Sep 17 00:00:00 2001
   2 From: Andre Przywara <andre.przywara@arm.com>
   3 Date: Sun, 12 Feb 2017 14:53:16 +0000
   4 Subject: [PATCH 10/29] introduce and use sunxi_gpio_setup_dt_pins()
   5
   6 ---
   7  arch/arm/include/asm/arch-sunxi/gpio.h |  3 ++
   8  arch/arm/mach-sunxi/pinmux.c           | 61 ++++++++++++++++++++++++++
   9  2 files changed, 64 insertions(+)
  10
  11 diff --git a/arch/arm/include/asm/arch-sunxi/gpio.h b/arch/arm/include/asm/arch-sunxi/gpio.h
  12 index 43088e2f54..723c553a8c 100644
  13 --- a/arch/arm/include/asm/arch-sunxi/gpio.h
  14 +++ b/arch/arm/include/asm/arch-sunxi/gpio.h
  15 @@ -250,4 +250,7 @@ int axp_gpio_init(void);
  16  static inline int axp_gpio_init(void) { return 0; }
  17  #endif
  18
  19 +int sunxi_gpio_setup_dt_pins(const void * volatile fdt_blob, int node,
  20 +                            const char * mux_name, int mux_sel);
  21 +
  22  #endif /* _SUNXI_GPIO_H */
  23 diff --git a/arch/arm/mach-sunxi/pinmux.c b/arch/arm/mach-sunxi/pinmux.c
  24 index 642483f06c..6ffba3910b 100644
  25 --- a/arch/arm/mach-sunxi/pinmux.c
  26 +++ b/arch/arm/mach-sunxi/pinmux.c
  27 @@ -8,6 +8,9 @@
  28  #include <common.h>
  29  #include <asm/io.h>
  30  #include <asm/arch/gpio.h>
  31 +#include <fdtdec.h>
  32 +#include <fdt_support.h>
  33 +#include <dt-bindings/pinctrl/sun4i-a10.h>
  34
  35  void sunxi_gpio_set_cfgbank(struct sunxi_gpio *pio, int bank_offset, u32 val)
  36  {
  37 @@ -68,3 +71,61 @@ int sunxi_gpio_set_pull(u32 pin, u32 val)
  38
  39         return 0;
  40  }
  41 +
  42 +int sunxi_gpio_setup_dt_pins(const void * volatile fdt_blob, int node,
  43 +                            const char * mux_name, int mux_sel)
  44 +{
  45 +       int drive, pull, pin, i;
  46 +       const char *pin_name;
  47 +       int offset;
  48 +
  49 +       offset = fdtdec_lookup_phandle(fdt_blob, node, "pinctrl-0");
  50 +       if (offset < 0)
  51 +               return offset;
  52 +
  53 +       drive = fdt_getprop_u32_default_node(fdt_blob, offset, 0,
  54 +                                            "drive-strength", 0);
  55 +       if (drive) {
  56 +               if (drive <= 10)
  57 +                       drive = SUN4I_PINCTRL_10_MA;
  58 +               else if (drive <= 20)
  59 +                       drive = SUN4I_PINCTRL_20_MA;
  60 +               else if (drive <= 30)
  61 +                       drive = SUN4I_PINCTRL_30_MA;
  62 +               else
  63 +                       drive = SUN4I_PINCTRL_40_MA;
  64 +       } else {
  65 +               drive = fdt_getprop_u32_default_node(fdt_blob, offset, 0,
  66 +                                                    "allwinner,drive", 4);
  67 +       }
  68 +
  69 +       if (fdt_get_property(fdt_blob, offset, "bias-pull-up", NULL))
  70 +               pull = SUN4I_PINCTRL_PULL_UP;
  71 +       else if (fdt_get_property(fdt_blob, offset, "bias-disable", NULL))
  72 +               pull = SUN4I_PINCTRL_NO_PULL;
  73 +       else if (fdt_get_property(fdt_blob, offset, "bias-pull-down", NULL))
  74 +               pull = SUN4I_PINCTRL_PULL_DOWN;
  75 +       else
  76 +               pull = fdt_getprop_u32_default_node(fdt_blob, offset, 0,
  77 +                                                   "allwinner,pull", 0);
  78 +
  79 +       for (i = 0; ; i++) {
  80 +               pin_name = fdt_stringlist_get(fdt_blob, offset,
  81 +                                             "allwinner,pins", i, NULL);
  82 +               if (!pin_name) {
  83 +                       pin_name = fdt_stringlist_get(fdt_blob, offset,
  84 +                                                     "pins", i, NULL);
  85 +                       if (!pin_name)
  86 +                               break;
  87 +               }
  88 +               pin = sunxi_name_to_gpio(pin_name);
  89 +               if (pin < 0)
  90 +                       continue;
  91 +
  92 +               sunxi_gpio_set_cfgpin(pin, mux_sel);
  93 +               sunxi_gpio_set_drv(pin, drive);
  94 +               sunxi_gpio_set_pull(pin, pull);
  95 +       }
  96 +
  97 +       return i;
  98 +}
  99 --
 100 2.20.1
 101