| Darwin Rambo | c561314 | 2014-02-11 11:06:34 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2013 Broadcom Corporation. |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0+ |
| 5 | */ |
| 6 | |
| 7 | #include <common.h> |
| 8 | #include <asm/io.h> |
| 9 | #include <asm/errno.h> |
| 10 | #include <asm/arch/sysmap.h> |
| 11 | #include <asm/kona-common/clk.h> |
| 12 | #include "clk-core.h" |
| 13 | |
| 14 | /* Enable appropriate clocks for a BSC/I2C port */ |
| 15 | int clk_bsc_enable(void *base) |
| 16 | { |
| 17 | int ret; |
| 18 | char *bscstr, *apbstr; |
| 19 | |
| 20 | switch ((u32) base) { |
| 21 | case PMU_BSC_BASE_ADDR: |
| 22 | /* PMU clock is always enabled */ |
| 23 | return 0; |
| 24 | case BSC1_BASE_ADDR: |
| 25 | bscstr = "bsc1_clk"; |
| 26 | apbstr = "bsc1_apb_clk"; |
| 27 | break; |
| 28 | case BSC2_BASE_ADDR: |
| 29 | bscstr = "bsc2_clk"; |
| 30 | apbstr = "bsc2_apb_clk"; |
| 31 | break; |
| 32 | case BSC3_BASE_ADDR: |
| 33 | bscstr = "bsc3_clk"; |
| 34 | apbstr = "bsc3_apb_clk"; |
| 35 | break; |
| 36 | default: |
| 37 | printf("%s: base 0x%p not found\n", __func__, base); |
| 38 | return -EINVAL; |
| 39 | } |
| 40 | |
| 41 | /* Note that the bus clock must be enabled first */ |
| 42 | |
| 43 | ret = clk_get_and_enable(apbstr); |
| 44 | if (ret) |
| 45 | return ret; |
| 46 | |
| 47 | ret = clk_get_and_enable(bscstr); |
| 48 | if (ret) |
| 49 | return ret; |
| 50 | |
| 51 | return 0; |
| 52 | } |