2 * arch/arm/mach-spear13xx/spear13xx.c
4 * SPEAr13XX machines common source file
6 * Copyright (C) 2012 ST Microelectronics
7 * Viresh Kumar <vireshk@kernel.org>
9 * This file is licensed under the terms of the GNU General Public
10 * License version 2. This program is licensed "as is" without any
11 * warranty of any kind, whether express or implied.
14 #define pr_fmt(fmt) "SPEAr13xx: " fmt
16 #include <linux/amba/pl022.h>
17 #include <linux/clk.h>
18 #include <linux/clk/spear.h>
19 #include <linux/clocksource.h>
20 #include <linux/err.h>
22 #include <asm/hardware/cache-l2x0.h>
23 #include <asm/mach/map.h>
27 void __init spear13xx_l2x0_init(void)
30 * 512KB (64KB/way), 8-way associativity, parity supported
32 * FIXME: 9th bit, of Auxiliary Controller register must be set
33 * for some spear13xx devices for stable L2 operation.
35 * Enable Early BRESP, L2 prefetch for Instruction and Data,
36 * write alloc and 'Full line of zero' options
39 if (!IS_ENABLED(CONFIG_CACHE_L2X0))
42 writel_relaxed(0x06, VA_L2CC_BASE + L310_PREFETCH_CTRL);
45 * Program following latencies in order to make
46 * SPEAr1340 work at 600 MHz
48 writel_relaxed(0x221, VA_L2CC_BASE + L310_TAG_LATENCY_CTRL);
49 writel_relaxed(0x441, VA_L2CC_BASE + L310_DATA_LATENCY_CTRL);
50 l2x0_init(VA_L2CC_BASE, 0x30a00001, 0xfe0fffff);
54 * Following will create 16MB static virtual/physical mappings
56 * 0xB3000000 0xF9000000
57 * 0xE0000000 0xFD000000
58 * 0xEC000000 0xFC000000
59 * 0xED000000 0xFB000000
61 static struct map_desc spear13xx_io_desc[] __initdata = {
63 .virtual = (unsigned long)VA_PERIP_GRP2_BASE,
64 .pfn = __phys_to_pfn(PERIP_GRP2_BASE),
68 .virtual = (unsigned long)VA_PERIP_GRP1_BASE,
69 .pfn = __phys_to_pfn(PERIP_GRP1_BASE),
73 .virtual = (unsigned long)VA_A9SM_AND_MPMC_BASE,
74 .pfn = __phys_to_pfn(A9SM_AND_MPMC_BASE),
78 .virtual = (unsigned long)VA_L2CC_BASE,
79 .pfn = __phys_to_pfn(L2CC_BASE),
85 /* This will create static memory mapping for selected devices */
86 void __init spear13xx_map_io(void)
88 iotable_init(spear13xx_io_desc, ARRAY_SIZE(spear13xx_io_desc));
91 static void __init spear13xx_clk_init(void)
93 if (of_machine_is_compatible("st,spear1310"))
94 spear1310_clk_init(VA_MISC_BASE, VA_SPEAR1310_RAS_BASE);
95 else if (of_machine_is_compatible("st,spear1340"))
96 spear1340_clk_init(VA_MISC_BASE);
98 pr_err("%s: Unknown machine\n", __func__);
101 void __init spear13xx_timer_init(void)
103 char pclk_name[] = "osc_24m_clk";
104 struct clk *gpt_clk, *pclk;
106 spear13xx_clk_init();
108 /* get the system timer clock */
109 gpt_clk = clk_get_sys("gpt0", NULL);
110 if (IS_ERR(gpt_clk)) {
111 pr_err("%s:couldn't get clk for gpt\n", __func__);
115 /* get the suitable parent clock for timer*/
116 pclk = clk_get(NULL, pclk_name);
118 pr_err("%s:couldn't get %s as parent for gpt\n", __func__,
123 clk_set_parent(gpt_clk, pclk);
127 spear_setup_of_timer();