LXR uboot/arch/arm/cpu/armv7/bcm235xx/clk-bsc.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright 2013 Broadcom Corporation.
   4 */
   5
   6#include <common.h>
   7#include <asm/io.h>
   8#include <linux/errno.h>
   9#include <asm/arch/sysmap.h>
  10#include <asm/kona-common/clk.h>
  11#include "clk-core.h"
  12
  13/* Enable appropriate clocks for a BSC/I2C port */
  14int clk_bsc_enable(void *base)
  15{
  16        int ret;
  17        char *bscstr, *apbstr;
  18
  19        switch ((u32) base) {
  20        case PMU_BSC_BASE_ADDR:
  21                /* PMU clock is always enabled */
  22                return 0;
  23        case BSC1_BASE_ADDR:
  24                bscstr = "bsc1_clk";
  25                apbstr = "bsc1_apb_clk";
  26                break;
  27        case BSC2_BASE_ADDR:
  28                bscstr = "bsc2_clk";
  29                apbstr = "bsc2_apb_clk";
  30                break;
  31        case BSC3_BASE_ADDR:
  32                bscstr = "bsc3_clk";
  33                apbstr = "bsc3_apb_clk";
  34                break;
  35        default:
  36                printf("%s: base 0x%p not found\n", __func__, base);
  37                return -EINVAL;
  38        }
  39
  40        /* Note that the bus clock must be enabled first */
  41
  42        ret = clk_get_and_enable(apbstr);
  43        if (ret)
  44                return ret;
  45
  46        ret = clk_get_and_enable(bscstr);
  47        if (ret)
  48                return ret;
  49
  50        return 0;
  51}
  52