111 lines
2.9 KiB
C
111 lines
2.9 KiB
C
/*
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* arch/arm/mach-spear3xx/spear3xx.c
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*
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* SPEAr3XX machines common source file
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*
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* Copyright (C) 2009-2012 ST Microelectronics
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* Viresh Kumar <vireshk@kernel.org>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#define pr_fmt(fmt) "SPEAr3xx: " fmt
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#include <linux/amba/pl022.h>
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#include <linux/amba/pl080.h>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <asm/mach/map.h>
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#include "pl080.h"
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#include "generic.h"
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#include <mach/spear.h>
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#include <mach/misc_regs.h>
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/* ssp device registration */
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struct pl022_ssp_controller pl022_plat_data = {
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.bus_id = 0,
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.enable_dma = 1,
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.dma_filter = pl08x_filter_id,
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.dma_tx_param = "ssp0_tx",
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.dma_rx_param = "ssp0_rx",
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/*
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* This is number of spi devices that can be connected to spi. There are
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* two type of chipselects on which slave devices can work. One is chip
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* select provided by spi masters other is controlled through external
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* gpio's. We can't use chipselect provided from spi master (because as
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* soon as FIFO becomes empty, CS is disabled and transfer ends). So
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* this number now depends on number of gpios available for spi. each
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* slave on each master requires a separate gpio pin.
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*/
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.num_chipselect = 2,
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};
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/* dmac device registration */
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struct pl08x_platform_data pl080_plat_data = {
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.memcpy_burst_size = PL08X_BURST_SZ_16,
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.memcpy_bus_width = PL08X_BUS_WIDTH_32_BITS,
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.memcpy_prot_buff = true,
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.memcpy_prot_cache = true,
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.lli_buses = PL08X_AHB1,
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.mem_buses = PL08X_AHB1,
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.get_xfer_signal = pl080_get_signal,
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.put_xfer_signal = pl080_put_signal,
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};
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/*
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* Following will create 16MB static virtual/physical mappings
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* PHYSICAL VIRTUAL
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* 0xD0000000 0xFD000000
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* 0xFC000000 0xFC000000
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*/
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struct map_desc spear3xx_io_desc[] __initdata = {
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{
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.virtual = (unsigned long)VA_SPEAR_ICM1_2_BASE,
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.pfn = __phys_to_pfn(SPEAR_ICM1_2_BASE),
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.length = SZ_16M,
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.type = MT_DEVICE
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}, {
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.virtual = (unsigned long)VA_SPEAR_ICM3_SMI_CTRL_BASE,
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.pfn = __phys_to_pfn(SPEAR_ICM3_SMI_CTRL_BASE),
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.length = SZ_16M,
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.type = MT_DEVICE
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},
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};
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/* This will create static memory mapping for selected devices */
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void __init spear3xx_map_io(void)
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{
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iotable_init(spear3xx_io_desc, ARRAY_SIZE(spear3xx_io_desc));
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}
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void __init spear3xx_timer_init(void)
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{
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char pclk_name[] = "pll3_clk";
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struct clk *gpt_clk, *pclk;
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spear3xx_clk_init(MISC_BASE, VA_SPEAR320_SOC_CONFIG_BASE);
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/* get the system timer clock */
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gpt_clk = clk_get_sys("gpt0", NULL);
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if (IS_ERR(gpt_clk)) {
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pr_err("%s:couldn't get clk for gpt\n", __func__);
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BUG();
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}
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/* get the suitable parent clock for timer*/
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pclk = clk_get(NULL, pclk_name);
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if (IS_ERR(pclk)) {
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pr_err("%s:couldn't get %s as parent for gpt\n",
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__func__, pclk_name);
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BUG();
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}
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clk_set_parent(gpt_clk, pclk);
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clk_put(gpt_clk);
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clk_put(pclk);
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spear_setup_of_timer();
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}
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