arch/arm/mach-omap2/pdata-quirks.c

   1 /*
   2  * Legacy platform_data quirks
   3  *
   4  * Copyright (C) 2013 Texas Instruments
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #include <linux/clk.h>
  11 #include <linux/gpio.h>
  12 #include <linux/init.h>
  13 #include <linux/kernel.h>
  14 #include <linux/wl12xx.h>
  15
  16 #include "common.h"
  17 #include "common-board-devices.h"
  18 #include "dss-common.h"
  19
  20 struct pdata_init {
  21         const char *compatible;
  22         void (*fn)(void);
  23 };
  24
  25 /*
  26  * Create alias for USB host PHY clock.
  27  * Remove this when clock phandle can be provided via DT
  28  */
  29 static void __init __used legacy_init_ehci_clk(char *clkname)
  30 {
  31         int ret;
  32
  33         ret = clk_add_alias("main_clk", NULL, clkname, NULL);
  34         if (ret)
  35                 pr_err("%s:Failed to add main_clk alias to %s :%d\n",
  36                        __func__, clkname, ret);
  37 }
  38
  39 #if IS_ENABLED(CONFIG_WL12XX)
  40
  41 static struct wl12xx_platform_data wl12xx __initdata;
  42
  43 static void __init __used legacy_init_wl12xx(unsigned ref_clock,
  44                                              unsigned tcxo_clock,
  45                                              int gpio)
  46 {
  47         int res;
  48
  49         wl12xx.board_ref_clock = ref_clock;
  50         wl12xx.board_tcxo_clock = tcxo_clock;
  51         wl12xx.irq = gpio_to_irq(gpio);
  52
  53         res = wl12xx_set_platform_data(&wl12xx);
  54         if (res) {
  55                 pr_err("error setting wl12xx data: %d\n", res);
  56                 return;
  57         }
  58 }
  59 #else
  60 static inline void legacy_init_wl12xx(unsigned ref_clock,
  61                                       unsigned tcxo_clock,
  62                                       int gpio)
  63 {
  64 }
  65 #endif
  66
  67 #ifdef CONFIG_ARCH_OMAP4
  68 static void __init omap4_sdp_legacy_init(void)
  69 {
  70         omap_4430sdp_display_init_of();
  71         legacy_init_wl12xx(WL12XX_REFCLOCK_26,
  72                            WL12XX_TCXOCLOCK_26, 53);
  73 }
  74
  75 static void __init omap4_panda_legacy_init(void)
  76 {
  77         omap4_panda_display_init_of();
  78         legacy_init_ehci_clk("auxclk3_ck");
  79         legacy_init_wl12xx(WL12XX_REFCLOCK_38, 0, 53);
  80 }
  81 #endif
  82
  83 #ifdef CONFIG_SOC_OMAP5
  84 static void __init omap5_uevm_legacy_init(void)
  85 {
  86         legacy_init_ehci_clk("auxclk1_ck");
  87 }
  88 #endif
  89
  90 static struct pdata_init pdata_quirks[] __initdata = {
  91 #ifdef CONFIG_ARCH_OMAP4
  92         { "ti,omap4-sdp", omap4_sdp_legacy_init, },
  93         { "ti,omap4-panda", omap4_panda_legacy_init, },
  94 #endif
  95 #ifdef CONFIG_SOC_OMAP5
  96         { "ti,omap5-uevm", omap5_uevm_legacy_init, },
  97 #endif
  98         { /* sentinel */ },
  99 };
 100
 101 void __init pdata_quirks_init(void)
 102 {
 103         struct pdata_init *quirks = pdata_quirks;
 104
 105         while (quirks->compatible) {
 106                 if (of_machine_is_compatible(quirks->compatible)) {
 107                         if (quirks->fn)
 108                                 quirks->fn();
 109                         break;
 110                 }
 111                 quirks++;
 112         }
 113 }