1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * arch/arm/mach-spear3xx/spear3xx.c
4  *
5  * SPEAr3XX machines common source file
6  *
7  * Copyright (C) 2009-2012 ST Microelectronics
8  * Viresh Kumar <vireshk@kernel.org>
9  */
10 
11 #define pr_fmt(fmt) "SPEAr3xx: " fmt
12 
13 #include <linux/amba/pl022.h>
14 #include <linux/amba/pl080.h>
15 #include <linux/clk.h>
16 #include <linux/clk/spear.h>
17 #include <linux/io.h>
18 #include <asm/mach/map.h>
19 #include "pl080.h"
20 #include "generic.h"
21 #include "spear.h"
22 #include "misc_regs.h"
23 
24 /* ssp device registration */
25 struct pl022_ssp_controller pl022_plat_data = {
26 	.bus_id = 0,
27 	.enable_dma = 1,
28 	.dma_filter = pl08x_filter_id,
29 	.dma_tx_param = "ssp0_tx",
30 	.dma_rx_param = "ssp0_rx",
31 };
32 
33 /* dmac device registration */
34 struct pl08x_platform_data pl080_plat_data = {
35 	.memcpy_burst_size = PL08X_BURST_SZ_16,
36 	.memcpy_bus_width = PL08X_BUS_WIDTH_32_BITS,
37 	.memcpy_prot_buff = true,
38 	.memcpy_prot_cache = true,
39 	.lli_buses = PL08X_AHB1,
40 	.mem_buses = PL08X_AHB1,
41 	.get_xfer_signal = pl080_get_signal,
42 	.put_xfer_signal = pl080_put_signal,
43 };
44 
45 /*
46  * Following will create 16MB static virtual/physical mappings
47  * PHYSICAL		VIRTUAL
48  * 0xD0000000		0xFD000000
49  * 0xFC000000		0xFC000000
50  */
51 struct map_desc spear3xx_io_desc[] __initdata = {
52 	{
53 		.virtual	= (unsigned long)VA_SPEAR_ICM1_2_BASE,
54 		.pfn		= __phys_to_pfn(SPEAR_ICM1_2_BASE),
55 		.length		= SZ_16M,
56 		.type		= MT_DEVICE
57 	}, {
58 		.virtual	= (unsigned long)VA_SPEAR_ICM3_SMI_CTRL_BASE,
59 		.pfn		= __phys_to_pfn(SPEAR_ICM3_SMI_CTRL_BASE),
60 		.length		= SZ_16M,
61 		.type		= MT_DEVICE
62 	},
63 };
64 
65 /* This will create static memory mapping for selected devices */
spear3xx_map_io(void)66 void __init spear3xx_map_io(void)
67 {
68 	iotable_init(spear3xx_io_desc, ARRAY_SIZE(spear3xx_io_desc));
69 }
70 
spear3xx_timer_init(void)71 void __init spear3xx_timer_init(void)
72 {
73 	char pclk_name[] = "pll3_clk";
74 	struct clk *gpt_clk, *pclk;
75 
76 	spear3xx_clk_init(MISC_BASE, VA_SPEAR320_SOC_CONFIG_BASE);
77 
78 	/* get the system timer clock */
79 	gpt_clk = clk_get_sys("gpt0", NULL);
80 	if (IS_ERR(gpt_clk)) {
81 		pr_err("%s:couldn't get clk for gpt\n", __func__);
82 		BUG();
83 	}
84 
85 	/* get the suitable parent clock for timer*/
86 	pclk = clk_get(NULL, pclk_name);
87 	if (IS_ERR(pclk)) {
88 		pr_err("%s:couldn't get %s as parent for gpt\n",
89 				__func__, pclk_name);
90 		BUG();
91 	}
92 
93 	clk_set_parent(gpt_clk, pclk);
94 	clk_put(gpt_clk);
95 	clk_put(pclk);
96 
97 	spear_setup_of_timer();
98 }
99