target/linux/sunxi/patches-3.13/153-3-stmmac-allocate-pass-board-specific-data-to-callbacks.patch

   1 From 938dfdaa3c0f92e9a490d324f3bce43bbaef7632 Mon Sep 17 00:00:00 2001
   2 From: Chen-Yu Tsai <wens@csie.org>
   3 Date: Fri, 17 Jan 2014 21:24:42 +0800
   4 Subject: [PATCH] net: stmmac: Allocate and pass soc/board specific data to
   5  callbacks
   6
   7 The current .init and .exit callbacks requires access to driver
   8 private data structures. This is not a good seperation and abstraction.
   9
  10 Instead, we add a new .setup callback for allocating private data, and
  11 pass the returned pointer to the other callbacks.
  12
  13 Signed-off-by: Chen-Yu Tsai <wens@csie.org>
  14 Signed-off-by: David S. Miller <davem@davemloft.net>
  15 ---
  16  Documentation/networking/stmmac.txt                   | 12 ++++++++----
  17  drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 18 ++++++++++++++----
  18  include/linux/stmmac.h                                |  6 ++++--
  19  3 files changed, 26 insertions(+), 10 deletions(-)
  20
  21 diff --git a/Documentation/networking/stmmac.txt b/Documentation/networking/stmmac.txt
  22 index cdd916d..2090895 100644
  23 --- a/Documentation/networking/stmmac.txt
  24 +++ b/Documentation/networking/stmmac.txt
  25 @@ -127,8 +127,9 @@ struct plat_stmmacenet_data {
  26         int riwt_off;
  27         void (*fix_mac_speed)(void *priv, unsigned int speed);
  28         void (*bus_setup)(void __iomem *ioaddr);
  29 -       int (*init)(struct platform_device *pdev);
  30 -       void (*exit)(struct platform_device *pdev);
  31 +       void *(*setup)(struct platform_device *pdev);
  32 +       int (*init)(struct platform_device *pdev, void *priv);
  33 +       void (*exit)(struct platform_device *pdev, void *priv);
  34         void *custom_cfg;
  35         void *custom_data;
  36         void *bsp_priv;
  37 @@ -169,10 +170,13 @@ Where:
  38   o bus_setup: perform HW setup of the bus. For example, on some ST platforms
  39              this field is used to configure the AMBA  bridge to generate more
  40              efficient STBus traffic.
  41 - o init/exit: callbacks used for calling a custom initialization;
  42 + o setup/init/exit: callbacks used for calling a custom initialization;
  43              this is sometime necessary on some platforms (e.g. ST boxes)
  44              where the HW needs to have set some PIO lines or system cfg
  45 -            registers.
  46 +            registers. setup should return a pointer to private data,
  47 +            which will be stored in bsp_priv, and then passed to init and
  48 +            exit callbacks. init/exit callbacks should not use or modify
  49 +            platform data.
  50   o custom_cfg/custom_data: this is a custom configuration that can be passed
  51                            while initializing the resources.
  52   o bsp_priv: another private pointer.
  53 diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
  54 index cc6b89a7..704a5e0 100644
  55 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
  56 +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
  57 @@ -144,9 +144,16 @@ static int stmmac_pltfr_probe(struct platform_device *pdev)
  58                 }
  59         }
  60
  61 +       /* Custom setup (if needed) */
  62 +       if (plat_dat->setup) {
  63 +               plat_dat->bsp_priv = plat_dat->setup(pdev);
  64 +               if (IS_ERR(plat_dat->bsp_priv))
  65 +                       return PTR_ERR(plat_dat->bsp_priv);
  66 +       }
  67 +
  68         /* Custom initialisation (if needed)*/
  69         if (plat_dat->init) {
  70 -               ret = plat_dat->init(pdev);
  71 +               ret = plat_dat->init(pdev, plat_dat->bsp_priv);
  72                 if (unlikely(ret))
  73                         return ret;
  74         }
  75 @@ -203,7 +210,10 @@ static int stmmac_pltfr_remove(struct platform_device *pdev)
  76         int ret = stmmac_dvr_remove(ndev);
  77
  78         if (priv->plat->exit)
  79 -               priv->plat->exit(pdev);
  80 +               priv->plat->exit(pdev, priv->plat->bsp_priv);
  81 +
  82 +       if (priv->plat->free)
  83 +               priv->plat->free(pdev, priv->plat->bsp_priv);
  84
  85         return ret;
  86  }
  87 @@ -218,7 +228,7 @@ static int stmmac_pltfr_suspend(struct device *dev)
  88
  89         ret = stmmac_suspend(ndev);
  90         if (priv->plat->exit)
  91 -               priv->plat->exit(pdev);
  92 +               priv->plat->exit(pdev, priv->plat->bsp_priv);
  93
  94         return ret;
  95  }
  96 @@ -230,7 +240,7 @@ static int stmmac_pltfr_resume(struct device *dev)
  97         struct platform_device *pdev = to_platform_device(dev);
  98
  99         if (priv->plat->init)
 100 -               priv->plat->init(pdev);
 101 +               priv->plat->init(pdev, priv->plat->bsp_priv);
 102
 103         return stmmac_resume(ndev);
 104  }
 105 diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
 106 index 33ace71..0a5a7ac 100644
 107 --- a/include/linux/stmmac.h
 108 +++ b/include/linux/stmmac.h
 109 @@ -113,8 +113,10 @@ struct plat_stmmacenet_data {
 110         int max_speed;
 111         void (*fix_mac_speed)(void *priv, unsigned int speed);
 112         void (*bus_setup)(void __iomem *ioaddr);
 113 -       int (*init)(struct platform_device *pdev);
 114 -       void (*exit)(struct platform_device *pdev);
 115 +       void *(*setup)(struct platform_device *pdev);
 116 +       void (*free)(struct platform_device *pdev, void *priv);
 117 +       int (*init)(struct platform_device *pdev, void *priv);
 118 +       void (*exit)(struct platform_device *pdev, void *priv);
 119         void *custom_cfg;
 120         void *custom_data;
 121         void *bsp_priv;
 122 --
 123 1.8.5.5
 124