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Second Round of Renesas ARM Based SoC R-Car SYSC Updates for v4.8 

* Prepare for handling SYSC interrupt configuration purely
   from DT in the rcar-sysc driver for new SoCs, while preserving
   backward compatibility with old DTBs for R-Car H1, H2, and M2-W
 * Add R8A7792 support
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Merge tag 'renesas-rcar-sysc2-for-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/drivers

Second Round of Renesas ARM Based SoC R-Car SYSC Updates for v4.8

* Prepare for handling SYSC interrupt configuration purely
  from DT in the rcar-sysc driver for new SoCs, while preserving
  backward compatibility with old DTBs for R-Car H1, H2, and M2-W
* Add R8A7792 support

* tag 'renesas-rcar-sysc2-for-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  soc: renesas: rcar-sysc: Improve SYSC interrupt config in legacy wrapper
  soc: renesas: rcar-sysc: Move SYSC interrupt config to rcar-sysc driver
  soc: renesas: rcar-sysc: Make rcar_sysc_init() init the PM domains
  soc: renesas: rcar-sysc: Fix uninitialized error code in rcar_sysc_pd_init()
  soc: renesas: rcar-sysc: add R8A7792 support

Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Olof Johansson 2016-07-06 22:12:04 -07:00
parent 564c9741aa ced42730d1
commit b85751c761
7 changed files with 71 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/arm/mach-shmobile/pm-r8a7779.c
View File

@ -23,11 +23,7 @@
static void __init r8a7779_sysc_init(void)
{
void __iomem *base = rcar_sysc_init(0xffd85000);
/* enable all interrupt sources, but do not use interrupt handler */
iowrite32(0x0131000e, base + SYSCIER);
iowrite32(0, base + SYSCIMR);
rcar_sysc_init(0xffd85000, 0x0131000e);
}
#else /* CONFIG_PM || CONFIG_SMP */

6
arch/arm/mach-shmobile/pm-rcar-gen2.c
View File

@ -37,11 +37,7 @@
static void __init rcar_gen2_sysc_init(u32 syscier)
{
void __iomem *base = rcar_sysc_init(0xe6180000);
/* enable all interrupt sources, but do not use interrupt handler */
iowrite32(syscier, base + SYSCIER);
iowrite32(0, base + SYSCIMR);
rcar_sysc_init(0xe6180000, syscier);
}
#else /* CONFIG_SMP */

1
drivers/soc/renesas/Makefile
View File

@ -1,6 +1,7 @@
obj-$(CONFIG_ARCH_R8A7779) += rcar-sysc.o r8a7779-sysc.o
obj-$(CONFIG_ARCH_R8A7790) += rcar-sysc.o r8a7790-sysc.o
obj-$(CONFIG_ARCH_R8A7791) += rcar-sysc.o r8a7791-sysc.o
obj-$(CONFIG_ARCH_R8A7792) += rcar-sysc.o r8a7792-sysc.o
# R-Car M2-N is identical to R-Car M2-W w.r.t. power domains.
obj-$(CONFIG_ARCH_R8A7793) += rcar-sysc.o r8a7791-sysc.o
obj-$(CONFIG_ARCH_R8A7794) += rcar-sysc.o r8a7794-sysc.o

34
drivers/soc/renesas/r8a7792-sysc.c Normal file
View File

@ -0,0 +1,34 @@
/*
* Renesas R-Car V2H (R8A7792) System Controller
*
* Copyright (C) 2016 Cogent Embedded Inc.
*
* 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.
*/
#include <linux/bug.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <dt-bindings/power/r8a7792-sysc.h>
#include "rcar-sysc.h"
static const struct rcar_sysc_area r8a7792_areas[] __initconst = {
{ "always-on", 0, 0, R8A7792_PD_ALWAYS_ON, -1, PD_ALWAYS_ON },
{ "ca15-scu", 0x180, 0, R8A7792_PD_CA15_SCU, R8A7792_PD_ALWAYS_ON,
PD_SCU },
{ "ca15-cpu0", 0x40, 0, R8A7792_PD_CA15_CPU0, R8A7792_PD_CA15_SCU,
PD_CPU_NOCR },
{ "ca15-cpu1", 0x40, 1, R8A7792_PD_CA15_CPU1, R8A7792_PD_CA15_SCU,
PD_CPU_NOCR },
{ "sgx", 0xc0, 0, R8A7792_PD_SGX, R8A7792_PD_ALWAYS_ON },
{ "imp", 0x140, 0, R8A7792_PD_IMP, R8A7792_PD_ALWAYS_ON },
};
const struct rcar_sysc_info r8a7792_sysc_info __initconst = {
.areas = r8a7792_areas,
.num_areas = ARRAY_SIZE(r8a7792_areas),
};

42
drivers/soc/renesas/rcar-sysc.c
View File

@ -164,15 +164,6 @@ static bool rcar_sysc_power_is_off(const struct rcar_sysc_ch *sysc_ch)
return false;
}
void __iomem *rcar_sysc_init(phys_addr_t base)
{
rcar_sysc_base = ioremap_nocache(base, PAGE_SIZE);
if (!rcar_sysc_base)
panic("unable to ioremap R-Car SYSC hardware block\n");
return rcar_sysc_base;
}
struct rcar_sysc_pd {
struct generic_pm_domain genpd;
struct rcar_sysc_ch ch;
@ -293,6 +284,9 @@ static const struct of_device_id rcar_sysc_matches[] = {
#ifdef CONFIG_ARCH_R8A7791
{ .compatible = "renesas,r8a7791-sysc", .data = &r8a7791_sysc_info },
#endif
#ifdef CONFIG_ARCH_R8A7792
{ .compatible = "renesas,r8a7792-sysc", .data = &r8a7792_sysc_info },
#endif
#ifdef CONFIG_ARCH_R8A7793
/* R-Car M2-N is identical to R-Car M2-W w.r.t. power domains. */
{ .compatible = "renesas,r8a7793-sysc", .data = &r8a7791_sysc_info },
@ -325,6 +319,9 @@ static int __init rcar_sysc_pd_init(void)
unsigned int i;
int error;
if (rcar_sysc_base)
return 0;
np = of_find_matching_node_and_match(NULL, rcar_sysc_matches, &match);
if (!np)
return -ENODEV;
@ -395,10 +392,35 @@ static int __init rcar_sysc_pd_init(void)
domains->domains[area->isr_bit] = &pd->genpd;
}
of_genpd_add_provider_onecell(np, &domains->onecell_data);
error = of_genpd_add_provider_onecell(np, &domains->onecell_data);
out_put:
of_node_put(np);
return error;
}
early_initcall(rcar_sysc_pd_init);
void __init rcar_sysc_init(phys_addr_t base, u32 syscier)
{
u32 syscimr;
if (!rcar_sysc_pd_init())
return;
rcar_sysc_base = ioremap_nocache(base, PAGE_SIZE);
/*
* Mask all interrupt sources to prevent the CPU from receiving them.
* Make sure not to clear reserved bits that were set before.
*/
syscimr = ioread32(rcar_sysc_base + SYSCIMR);
syscimr |= syscier;
pr_debug("%s: syscimr = 0x%08x\n", __func__, syscimr);
iowrite32(syscimr, rcar_sysc_base + SYSCIMR);
/*
* SYSC needs all interrupt sources enabled to control power.
*/
pr_debug("%s: syscier = 0x%08x\n", __func__, syscier);
iowrite32(syscier, rcar_sysc_base + SYSCIER);
}

1
drivers/soc/renesas/rcar-sysc.h
View File

@ -53,6 +53,7 @@ struct rcar_sysc_info {
extern const struct rcar_sysc_info r8a7779_sysc_info;
extern const struct rcar_sysc_info r8a7790_sysc_info;
extern const struct rcar_sysc_info r8a7791_sysc_info;
extern const struct rcar_sysc_info r8a7792_sysc_info;
extern const struct rcar_sysc_info r8a7794_sysc_info;
extern const struct rcar_sysc_info r8a7795_sysc_info;
extern const struct rcar_sysc_info r8a7796_sysc_info;

2
include/linux/soc/renesas/rcar-sysc.h
View File

@ -11,6 +11,6 @@ struct rcar_sysc_ch {
int rcar_sysc_power_down(const struct rcar_sysc_ch *sysc_ch);
int rcar_sysc_power_up(const struct rcar_sysc_ch *sysc_ch);
void __iomem *rcar_sysc_init(phys_addr_t base);
void rcar_sysc_init(phys_addr_t base, u32 syscier);
#endif /* __LINUX_SOC_RENESAS_RCAR_SYSC_H__ */