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ARM: shmobile: r8a7791 CMT support 

Add r8a7791 CMT support via channel 0 of CMT0. At this
point the CMT is used for clock event operation, but in
the future the arch timer will be the main timer and the
CMT will be used for deep sleep wake up only.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
(cherry picked from commit a7663b88280d00359715817620798e99d54d401c)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Magnus Damm 2013-09-04 12:46:17 +09:00 committed by Simon Horman
parent e6491d08ed
commit 1bebd72a71
3 changed files with 36 additions and 1 deletions
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7
arch/arm/mach-shmobile/clock-r8a7791.c
View File

@ -101,7 +101,7 @@ SH_FIXED_RATIO_CLK_SET(cp_clk, extal_clk, 1, 2);
SH_FIXED_RATIO_CLK_SET(pll1_div2_clk, pll1_clk, 1, 2);
SH_FIXED_RATIO_CLK_SET(hp_clk, pll1_clk, 1, 12);
SH_FIXED_RATIO_CLK_SET(p_clk, pll1_clk, 1, 24);
SH_FIXED_RATIO_CLK_SET(rclk_clk, pll1_clk, 1, (48 * 1024));
SH_FIXED_RATIO_CLK_SET(mp_clk, pll1_div2_clk, 1, 15);
static struct clk *main_clks[] = {
@ -113,6 +113,7 @@ static struct clk *main_clks[] = {
&pll3_clk,
&hp_clk,
&p_clk,
&rclk_clk,
&mp_clk,
&cp_clk,
};
@ -123,6 +124,7 @@ enum {
MSTP719, MSTP718, MSTP715, MSTP714,
MSTP216, MSTP207, MSTP206,
MSTP204, MSTP203, MSTP202, MSTP1105, MSTP1106, MSTP1107,
MSTP124,
MSTP_NR
};
@ -142,6 +144,7 @@ static struct clk mstp_clks[MSTP_NR] = {
[MSTP1105] = SH_CLK_MSTP32(&mp_clk, SMSTPCR11, 5, 0), /* SCIFA3 */
[MSTP1106] = SH_CLK_MSTP32(&mp_clk, SMSTPCR11, 6, 0), /* SCIFA4 */
[MSTP1107] = SH_CLK_MSTP32(&mp_clk, SMSTPCR11, 7, 0), /* SCIFA5 */
[MSTP124] = SH_CLK_MSTP32(&rclk_clk, SMSTPCR1, 24, 0), /* CMT0 */
};
static struct clk_lookup lookups[] = {
@ -155,6 +158,7 @@ static struct clk_lookup lookups[] = {
CLKDEV_CON_ID("pll3", &pll3_clk),
CLKDEV_CON_ID("hp", &hp_clk),
CLKDEV_CON_ID("p", &p_clk),
CLKDEV_CON_ID("rclk", &rclk_clk),
CLKDEV_CON_ID("mp", &mp_clk),
CLKDEV_CON_ID("cp", &cp_clk),
CLKDEV_CON_ID("peripheral_clk", &hp_clk),
@ -175,6 +179,7 @@ static struct clk_lookup lookups[] = {
CLKDEV_DEV_ID("sh-sci.12", &mstp_clks[MSTP1105]), /* SCIFA3 */
CLKDEV_DEV_ID("sh-sci.13", &mstp_clks[MSTP1106]), /* SCIFA4 */
CLKDEV_DEV_ID("sh-sci.14", &mstp_clks[MSTP1107]), /* SCIFA5 */
CLKDEV_DEV_ID("sh_cmt.0", &mstp_clks[MSTP124]),
};
#define R8A7791_CLOCK_ROOT(e, m, p0, p1, p30, p31) \

1
arch/arm/mach-shmobile/include/mach/r8a7791.h
View File

@ -3,5 +3,6 @@
void r8a7791_add_dt_devices(void);
void r8a7791_clock_init(void);
void r8a7791_init_early(void);
#endif /* __ASM_R8A7791_H__ */

29
arch/arm/mach-shmobile/setup-r8a7791.c
View File

@ -23,6 +23,7 @@
#include <linux/kernel.h>
#include <linux/of_platform.h>
#include <linux/serial_sci.h>
#include <linux/sh_timer.h>
#include <mach/common.h>
#include <mach/irqs.h>
#include <mach/r8a7791.h>
@ -89,6 +90,25 @@ static inline void r8a7791_register_scif(int idx)
sizeof(struct plat_sci_port));
}
static const struct sh_timer_config cmt00_platform_data __initconst = {
.name = "CMT00",
.timer_bit = 0,
.clockevent_rating = 80,
};
static const struct resource cmt00_resources[] __initconst = {
DEFINE_RES_MEM(0xffca0510, 0x0c),
DEFINE_RES_MEM(0xffca0500, 0x04),
DEFINE_RES_IRQ(gic_spi(142)), /* CMT0_0 */
};
#define r8a7791_register_cmt(idx) \
platform_device_register_resndata(&platform_bus, "sh_cmt", \
idx, cmt##idx##_resources, \
ARRAY_SIZE(cmt##idx##_resources), \
&cmt##idx##_platform_data, \
sizeof(struct sh_timer_config))
void __init r8a7791_add_dt_devices(void)
{
r8a7791_register_scif(SCIFA0);
@ -106,6 +126,14 @@ void __init r8a7791_add_dt_devices(void)
r8a7791_register_scif(SCIFA3);
r8a7791_register_scif(SCIFA4);
r8a7791_register_scif(SCIFA5);
r8a7791_register_cmt(00);
}
void __init r8a7791_init_early(void)
{
#ifndef CONFIG_ARM_ARCH_TIMER
shmobile_setup_delay(1300, 2, 4); /* Cortex-A15 @ 1300MHz */
#endif
}
#ifdef CONFIG_USE_OF
@ -115,6 +143,7 @@ static const char *r8a7791_boards_compat_dt[] __initdata = {
};
DT_MACHINE_START(R8A7791_DT, "Generic R8A7791 (Flattened Device Tree)")
.init_early = r8a7791_init_early,
.dt_compat = r8a7791_boards_compat_dt,
MACHINE_END
#endif /* CONFIG_USE_OF */