drivers/clk/clk-efm32gg.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2013 Pengutronix
   4  * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
   5  */
   6 #include <linux/io.h>
   7 #include <linux/clk-provider.h>
   8 #include <linux/of.h>
   9 #include <linux/of_address.h>
  10 #include <linux/slab.h>
  11
  12 #include <dt-bindings/clock/efm32-cmu.h>
  13
  14 #define CMU_HFPERCLKEN0         0x44
  15 #define CMU_MAX_CLKS            37
  16
  17 static struct clk_hw_onecell_data *clk_data;
  18
  19 static void __init efm32gg_cmu_init(struct device_node *np)
  20 {
  21         int i;
  22         void __iomem *base;
  23         struct clk_hw **hws;
  24
  25         clk_data = kzalloc(struct_size(clk_data, hws, CMU_MAX_CLKS),
  26                            GFP_KERNEL);
  27
  28         if (!clk_data)
  29                 return;
  30
  31         hws = clk_data->hws;
  32
  33         for (i = 0; i < CMU_MAX_CLKS; ++i)
  34                 hws[i] = ERR_PTR(-ENOENT);
  35
  36         base = of_iomap(np, 0);
  37         if (!base) {
  38                 pr_warn("Failed to map address range for efm32gg,cmu node\n");
  39                 return;
  40         }
  41
  42         hws[clk_HFXO] = clk_hw_register_fixed_rate(NULL, "HFXO", NULL, 0,
  43                                                    48000000);
  44
  45         hws[clk_HFPERCLKUSART0] = clk_hw_register_gate(NULL, "HFPERCLK.USART0",
  46                         "HFXO", 0, base + CMU_HFPERCLKEN0, 0, 0, NULL);
  47         hws[clk_HFPERCLKUSART1] = clk_hw_register_gate(NULL, "HFPERCLK.USART1",
  48                         "HFXO", 0, base + CMU_HFPERCLKEN0, 1, 0, NULL);
  49         hws[clk_HFPERCLKUSART2] = clk_hw_register_gate(NULL, "HFPERCLK.USART2",
  50                         "HFXO", 0, base + CMU_HFPERCLKEN0, 2, 0, NULL);
  51         hws[clk_HFPERCLKUART0] = clk_hw_register_gate(NULL, "HFPERCLK.UART0",
  52                         "HFXO", 0, base + CMU_HFPERCLKEN0, 3, 0, NULL);
  53         hws[clk_HFPERCLKUART1] = clk_hw_register_gate(NULL, "HFPERCLK.UART1",
  54                         "HFXO", 0, base + CMU_HFPERCLKEN0, 4, 0, NULL);
  55         hws[clk_HFPERCLKTIMER0] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER0",
  56                         "HFXO", 0, base + CMU_HFPERCLKEN0, 5, 0, NULL);
  57         hws[clk_HFPERCLKTIMER1] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER1",
  58                         "HFXO", 0, base + CMU_HFPERCLKEN0, 6, 0, NULL);
  59         hws[clk_HFPERCLKTIMER2] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER2",
  60                         "HFXO", 0, base + CMU_HFPERCLKEN0, 7, 0, NULL);
  61         hws[clk_HFPERCLKTIMER3] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER3",
  62                         "HFXO", 0, base + CMU_HFPERCLKEN0, 8, 0, NULL);
  63         hws[clk_HFPERCLKACMP0] = clk_hw_register_gate(NULL, "HFPERCLK.ACMP0",
  64                         "HFXO", 0, base + CMU_HFPERCLKEN0, 9, 0, NULL);
  65         hws[clk_HFPERCLKACMP1] = clk_hw_register_gate(NULL, "HFPERCLK.ACMP1",
  66                         "HFXO", 0, base + CMU_HFPERCLKEN0, 10, 0, NULL);
  67         hws[clk_HFPERCLKI2C0] = clk_hw_register_gate(NULL, "HFPERCLK.I2C0",
  68                         "HFXO", 0, base + CMU_HFPERCLKEN0, 11, 0, NULL);
  69         hws[clk_HFPERCLKI2C1] = clk_hw_register_gate(NULL, "HFPERCLK.I2C1",
  70                         "HFXO", 0, base + CMU_HFPERCLKEN0, 12, 0, NULL);
  71         hws[clk_HFPERCLKGPIO] = clk_hw_register_gate(NULL, "HFPERCLK.GPIO",
  72                         "HFXO", 0, base + CMU_HFPERCLKEN0, 13, 0, NULL);
  73         hws[clk_HFPERCLKVCMP] = clk_hw_register_gate(NULL, "HFPERCLK.VCMP",
  74                         "HFXO", 0, base + CMU_HFPERCLKEN0, 14, 0, NULL);
  75         hws[clk_HFPERCLKPRS] = clk_hw_register_gate(NULL, "HFPERCLK.PRS",
  76                         "HFXO", 0, base + CMU_HFPERCLKEN0, 15, 0, NULL);
  77         hws[clk_HFPERCLKADC0] = clk_hw_register_gate(NULL, "HFPERCLK.ADC0",
  78                         "HFXO", 0, base + CMU_HFPERCLKEN0, 16, 0, NULL);
  79         hws[clk_HFPERCLKDAC0] = clk_hw_register_gate(NULL, "HFPERCLK.DAC0",
  80                         "HFXO", 0, base + CMU_HFPERCLKEN0, 17, 0, NULL);
  81
  82         of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data);
  83 }
  84 CLK_OF_DECLARE(efm32ggcmu, "efm32gg,cmu", efm32gg_cmu_init);