linux/arch/arm/mach-shmobile/board-lager-reference.c
Simon Horman aa5de826af ARM: shmobile: lager-reference: Work around core clock issues
Due to issues with runtime PM clock management, clocks not explicitly
managed by their drivers may not be enabled at all, or be inadvertently
disabled by the clk_disable_unused() late initcall.

Until this is fixed, add a temporary workaround, calling
shmobile_clk_workaround() with enable == true.

For now this enables the clocks for: ether, msiof1, qspi_mod, and
thermal. More clocks can be added if needed.

Based on work for the koelsch board by Geert Uytterhoeven.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
2014-04-14 11:30:40 +09:00

145 lines
4.0 KiB
C

/*
* Lager board support - Reference DT implementation
*
* Copyright (C) 2013 Renesas Solutions Corp.
* Copyright (C) 2013 Simon Horman
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/dma-mapping.h>
#include <linux/init.h>
#include <linux/of_platform.h>
#include <linux/platform_data/rcar-du.h>
#include <mach/clock.h>
#include <mach/common.h>
#include <mach/irqs.h>
#include <mach/rcar-gen2.h>
#include <mach/r8a7790.h>
#include <asm/mach/arch.h>
/* DU */
static struct rcar_du_encoder_data lager_du_encoders[] = {
{
.type = RCAR_DU_ENCODER_VGA,
.output = RCAR_DU_OUTPUT_DPAD0,
}, {
.type = RCAR_DU_ENCODER_NONE,
.output = RCAR_DU_OUTPUT_LVDS1,
.connector.lvds.panel = {
.width_mm = 210,
.height_mm = 158,
.mode = {
.clock = 65000,
.hdisplay = 1024,
.hsync_start = 1048,
.hsync_end = 1184,
.htotal = 1344,
.vdisplay = 768,
.vsync_start = 771,
.vsync_end = 777,
.vtotal = 806,
.flags = 0,
},
},
},
};
static struct rcar_du_platform_data lager_du_pdata = {
.encoders = lager_du_encoders,
.num_encoders = ARRAY_SIZE(lager_du_encoders),
};
static const struct resource du_resources[] __initconst = {
DEFINE_RES_MEM(0xfeb00000, 0x70000),
DEFINE_RES_MEM_NAMED(0xfeb90000, 0x1c, "lvds.0"),
DEFINE_RES_MEM_NAMED(0xfeb94000, 0x1c, "lvds.1"),
DEFINE_RES_IRQ(gic_spi(256)),
DEFINE_RES_IRQ(gic_spi(268)),
DEFINE_RES_IRQ(gic_spi(269)),
};
static void __init lager_add_du_device(void)
{
struct platform_device_info info = {
.name = "rcar-du-r8a7790",
.id = -1,
.res = du_resources,
.num_res = ARRAY_SIZE(du_resources),
.data = &lager_du_pdata,
.size_data = sizeof(lager_du_pdata),
.dma_mask = DMA_BIT_MASK(32),
};
platform_device_register_full(&info);
}
/*
* This is a really crude hack to provide clkdev support to platform
* devices until they get moved to DT.
*/
static const struct clk_name clk_names[] __initconst = {
{ "cmt0", NULL, "sh_cmt.0" },
{ "scifa0", NULL, "sh-sci.0" },
{ "scifa1", NULL, "sh-sci.1" },
{ "scifb0", NULL, "sh-sci.2" },
{ "scifb1", NULL, "sh-sci.3" },
{ "scifb2", NULL, "sh-sci.4" },
{ "scifa2", NULL, "sh-sci.5" },
{ "scif0", NULL, "sh-sci.6" },
{ "scif1", NULL, "sh-sci.7" },
{ "hscif0", NULL, "sh-sci.8" },
{ "hscif1", NULL, "sh-sci.9" },
{ "du0", "du.0", "rcar-du-r8a7790" },
{ "du1", "du.1", "rcar-du-r8a7790" },
{ "du2", "du.2", "rcar-du-r8a7790" },
{ "lvds0", "lvds.0", "rcar-du-r8a7790" },
{ "lvds1", "lvds.1", "rcar-du-r8a7790" },
};
/*
* This is a really crude hack to work around core platform clock issues
*/
static const struct clk_name clk_enables[] __initconst = {
{ "ether", NULL, "ee700000.ethernet" },
{ "msiof1", NULL, "e6e10000.spi" },
{ "qspi_mod", NULL, "e6b10000.spi" },
{ "thermal", NULL, "e61f0000.thermal" },
};
static void __init lager_add_standard_devices(void)
{
shmobile_clk_workaround(clk_names, ARRAY_SIZE(clk_names), false);
shmobile_clk_workaround(clk_enables, ARRAY_SIZE(clk_enables), true);
r8a7790_add_dt_devices();
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
lager_add_du_device();
}
static const char *lager_boards_compat_dt[] __initdata = {
"renesas,lager",
"renesas,lager-reference",
NULL,
};
DT_MACHINE_START(LAGER_DT, "lager")
.smp = smp_ops(r8a7790_smp_ops),
.init_early = r8a7790_init_early,
.init_time = rcar_gen2_timer_init,
.init_machine = lager_add_standard_devices,
.init_late = shmobile_init_late,
.dt_compat = lager_boards_compat_dt,
MACHINE_END