mirror of
https://github.com/torvalds/linux
synced 2024-10-21 18:59:26 +00:00
6e8887f60f
This replaces an earlier patch from Viresh Kumar to move the spear platform over to the generic DMA binding. This version is now based on the merged multiplatform capable spear platform, rather than the separate spear13xx/3xx/6xx directories. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Viresh Kumar <viresh.kumar@linaro.org> Cc: Vinod Koul <vinod.koul@linux.intel.com> Cc: devicetree-discuss@lists.ozlabs.org Cc: Shiraz Hashim <shiraz.hashim@st.com> Cc: spear-devel@list.st.com
127 lines
3.1 KiB
C
127 lines
3.1 KiB
C
/*
|
|
* arch/arm/mach-spear13xx/spear13xx.c
|
|
*
|
|
* SPEAr13XX machines common source file
|
|
*
|
|
* Copyright (C) 2012 ST Microelectronics
|
|
* Viresh Kumar <viresh.linux@gmail.com>
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) "SPEAr13xx: " fmt
|
|
|
|
#include <linux/amba/pl022.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/err.h>
|
|
#include <linux/of.h>
|
|
#include <asm/hardware/cache-l2x0.h>
|
|
#include <asm/mach/map.h>
|
|
#include <asm/smp_twd.h>
|
|
#include "generic.h"
|
|
#include <mach/spear.h>
|
|
|
|
void __init spear13xx_l2x0_init(void)
|
|
{
|
|
/*
|
|
* 512KB (64KB/way), 8-way associativity, parity supported
|
|
*
|
|
* FIXME: 9th bit, of Auxillary Controller register must be set
|
|
* for some spear13xx devices for stable L2 operation.
|
|
*
|
|
* Enable Early BRESP, L2 prefetch for Instruction and Data,
|
|
* write alloc and 'Full line of zero' options
|
|
*
|
|
*/
|
|
|
|
writel_relaxed(0x06, VA_L2CC_BASE + L2X0_PREFETCH_CTRL);
|
|
|
|
/*
|
|
* Program following latencies in order to make
|
|
* SPEAr1340 work at 600 MHz
|
|
*/
|
|
writel_relaxed(0x221, VA_L2CC_BASE + L2X0_TAG_LATENCY_CTRL);
|
|
writel_relaxed(0x441, VA_L2CC_BASE + L2X0_DATA_LATENCY_CTRL);
|
|
l2x0_init(VA_L2CC_BASE, 0x70A60001, 0xfe00ffff);
|
|
}
|
|
|
|
/*
|
|
* Following will create 16MB static virtual/physical mappings
|
|
* PHYSICAL VIRTUAL
|
|
* 0xB3000000 0xFE000000
|
|
* 0xE0000000 0xFD000000
|
|
* 0xEC000000 0xFC000000
|
|
* 0xED000000 0xFB000000
|
|
*/
|
|
struct map_desc spear13xx_io_desc[] __initdata = {
|
|
{
|
|
.virtual = (unsigned long)VA_PERIP_GRP2_BASE,
|
|
.pfn = __phys_to_pfn(PERIP_GRP2_BASE),
|
|
.length = SZ_16M,
|
|
.type = MT_DEVICE
|
|
}, {
|
|
.virtual = (unsigned long)VA_PERIP_GRP1_BASE,
|
|
.pfn = __phys_to_pfn(PERIP_GRP1_BASE),
|
|
.length = SZ_16M,
|
|
.type = MT_DEVICE
|
|
}, {
|
|
.virtual = (unsigned long)VA_A9SM_AND_MPMC_BASE,
|
|
.pfn = __phys_to_pfn(A9SM_AND_MPMC_BASE),
|
|
.length = SZ_16M,
|
|
.type = MT_DEVICE
|
|
}, {
|
|
.virtual = (unsigned long)VA_L2CC_BASE,
|
|
.pfn = __phys_to_pfn(L2CC_BASE),
|
|
.length = SZ_4K,
|
|
.type = MT_DEVICE
|
|
},
|
|
};
|
|
|
|
/* This will create static memory mapping for selected devices */
|
|
void __init spear13xx_map_io(void)
|
|
{
|
|
iotable_init(spear13xx_io_desc, ARRAY_SIZE(spear13xx_io_desc));
|
|
}
|
|
|
|
static void __init spear13xx_clk_init(void)
|
|
{
|
|
if (of_machine_is_compatible("st,spear1310"))
|
|
spear1310_clk_init(VA_MISC_BASE, VA_SPEAR1310_RAS_BASE);
|
|
else if (of_machine_is_compatible("st,spear1340"))
|
|
spear1340_clk_init(VA_MISC_BASE);
|
|
else
|
|
pr_err("%s: Unknown machine\n", __func__);
|
|
}
|
|
|
|
void __init spear13xx_timer_init(void)
|
|
{
|
|
char pclk_name[] = "osc_24m_clk";
|
|
struct clk *gpt_clk, *pclk;
|
|
|
|
spear13xx_clk_init();
|
|
|
|
/* get the system timer clock */
|
|
gpt_clk = clk_get_sys("gpt0", NULL);
|
|
if (IS_ERR(gpt_clk)) {
|
|
pr_err("%s:couldn't get clk for gpt\n", __func__);
|
|
BUG();
|
|
}
|
|
|
|
/* get the suitable parent clock for timer*/
|
|
pclk = clk_get(NULL, pclk_name);
|
|
if (IS_ERR(pclk)) {
|
|
pr_err("%s:couldn't get %s as parent for gpt\n", __func__,
|
|
pclk_name);
|
|
BUG();
|
|
}
|
|
|
|
clk_set_parent(gpt_clk, pclk);
|
|
clk_put(gpt_clk);
|
|
clk_put(pclk);
|
|
|
|
spear_setup_of_timer();
|
|
twd_local_timer_of_register();
|
|
}
|