summaryrefslogtreecommitdiffstats
path: root/drivers
diff options
context:
space:
mode:
authorOlof Johansson <olof@lixom.net>2017-04-19 06:56:18 -0700
committerOlof Johansson <olof@lixom.net>2017-04-19 06:56:18 -0700
commit32d8b52b900c88dfe8d83e38c73eba3dcf00e901 (patch)
tree16ba1fdb8fb42e2b8aafcceb8f6dcdceff0fba79 /drivers
parent63466c49cbdfb8bef64965c8744e462335b2609d (diff)
parentfcb87087261e1be51b4c03677f39246bdc312b1c (diff)
downloadlinux-32d8b52b900c88dfe8d83e38c73eba3dcf00e901.tar.bz2
Merge tag 'renesas-sysc-for-v4.12' of https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/drivers
Renesas ARM Based SoC Sysc Updates for v4.12 * Add support for R-Car H3 ES2.0 * tag 'renesas-sysc-for-v4.12' of https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas: soc: renesas: rcar-sysc: Add support for R-Car H3 ES2.0 soc: renesas: rcar-sysc: Add support for fixing up power area tables soc: renesas: Register SoC device early base: soc: Allow early registration of a single SoC device base: soc: Let soc_device_match() return no match when called too early Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/base/soc.c52
-rw-r--r--drivers/soc/renesas/r8a7795-sysc.c26
-rw-r--r--drivers/soc/renesas/rcar-sysc.c25
-rw-r--r--drivers/soc/renesas/rcar-sysc.h10
-rw-r--r--drivers/soc/renesas/renesas-soc.c2
5 files changed, 93 insertions, 22 deletions
diff --git a/drivers/base/soc.c b/drivers/base/soc.c
index dc26e5949a32..909dedae4c4e 100644
--- a/drivers/base/soc.c
+++ b/drivers/base/soc.c
@@ -109,15 +109,18 @@ static void soc_release(struct device *dev)
kfree(soc_dev);
}
+static struct soc_device_attribute *early_soc_dev_attr;
+
struct soc_device *soc_device_register(struct soc_device_attribute *soc_dev_attr)
{
struct soc_device *soc_dev;
int ret;
if (!soc_bus_type.p) {
- ret = bus_register(&soc_bus_type);
- if (ret)
- goto out1;
+ if (early_soc_dev_attr)
+ return ERR_PTR(-EBUSY);
+ early_soc_dev_attr = soc_dev_attr;
+ return NULL;
}
soc_dev = kzalloc(sizeof(*soc_dev), GFP_KERNEL);
@@ -159,45 +162,53 @@ void soc_device_unregister(struct soc_device *soc_dev)
ida_simple_remove(&soc_ida, soc_dev->soc_dev_num);
device_unregister(&soc_dev->dev);
+ early_soc_dev_attr = NULL;
}
static int __init soc_bus_register(void)
{
- if (soc_bus_type.p)
- return 0;
+ int ret;
- return bus_register(&soc_bus_type);
+ ret = bus_register(&soc_bus_type);
+ if (ret)
+ return ret;
+
+ if (early_soc_dev_attr)
+ return PTR_ERR(soc_device_register(early_soc_dev_attr));
+
+ return 0;
}
core_initcall(soc_bus_register);
-static int soc_device_match_one(struct device *dev, void *arg)
+static int soc_device_match_attr(const struct soc_device_attribute *attr,
+ const struct soc_device_attribute *match)
{
- struct soc_device *soc_dev = container_of(dev, struct soc_device, dev);
- const struct soc_device_attribute *match = arg;
-
if (match->machine &&
- (!soc_dev->attr->machine ||
- !glob_match(match->machine, soc_dev->attr->machine)))
+ (!attr->machine || !glob_match(match->machine, attr->machine)))
return 0;
if (match->family &&
- (!soc_dev->attr->family ||
- !glob_match(match->family, soc_dev->attr->family)))
+ (!attr->family || !glob_match(match->family, attr->family)))
return 0;
if (match->revision &&
- (!soc_dev->attr->revision ||
- !glob_match(match->revision, soc_dev->attr->revision)))
+ (!attr->revision || !glob_match(match->revision, attr->revision)))
return 0;
if (match->soc_id &&
- (!soc_dev->attr->soc_id ||
- !glob_match(match->soc_id, soc_dev->attr->soc_id)))
+ (!attr->soc_id || !glob_match(match->soc_id, attr->soc_id)))
return 0;
return 1;
}
+static int soc_device_match_one(struct device *dev, void *arg)
+{
+ struct soc_device *soc_dev = container_of(dev, struct soc_device, dev);
+
+ return soc_device_match_attr(soc_dev->attr, arg);
+}
+
/*
* soc_device_match - identify the SoC in the machine
* @matches: zero-terminated array of possible matches
@@ -230,6 +241,11 @@ const struct soc_device_attribute *soc_device_match(
break;
ret = bus_for_each_dev(&soc_bus_type, NULL, (void *)matches,
soc_device_match_one);
+ if (ret < 0 && early_soc_dev_attr)
+ ret = soc_device_match_attr(early_soc_dev_attr,
+ matches);
+ if (ret < 0)
+ return NULL;
if (!ret)
matches++;
else
diff --git a/drivers/soc/renesas/r8a7795-sysc.c b/drivers/soc/renesas/r8a7795-sysc.c
index 5e7537c96f7b..7412666187b3 100644
--- a/drivers/soc/renesas/r8a7795-sysc.c
+++ b/drivers/soc/renesas/r8a7795-sysc.c
@@ -1,7 +1,7 @@
/*
* Renesas R-Car H3 System Controller
*
- * Copyright (C) 2016 Glider bvba
+ * Copyright (C) 2016-2017 Glider bvba
*
* 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
@@ -10,12 +10,13 @@
#include <linux/bug.h>
#include <linux/kernel.h>
+#include <linux/sys_soc.h>
#include <dt-bindings/power/r8a7795-sysc.h>
#include "rcar-sysc.h"
-static const struct rcar_sysc_area r8a7795_areas[] __initconst = {
+static struct rcar_sysc_area r8a7795_areas[] __initdata = {
{ "always-on", 0, 0, R8A7795_PD_ALWAYS_ON, -1, PD_ALWAYS_ON },
{ "ca57-scu", 0x1c0, 0, R8A7795_PD_CA57_SCU, R8A7795_PD_ALWAYS_ON,
PD_SCU },
@@ -40,6 +41,7 @@ static const struct rcar_sysc_area r8a7795_areas[] __initconst = {
{ "a3vp", 0x340, 0, R8A7795_PD_A3VP, R8A7795_PD_ALWAYS_ON },
{ "cr7", 0x240, 0, R8A7795_PD_CR7, R8A7795_PD_ALWAYS_ON },
{ "a3vc", 0x380, 0, R8A7795_PD_A3VC, R8A7795_PD_ALWAYS_ON },
+ /* A2VC0 exists on ES1.x only */
{ "a2vc0", 0x3c0, 0, R8A7795_PD_A2VC0, R8A7795_PD_A3VC },
{ "a2vc1", 0x3c0, 1, R8A7795_PD_A2VC1, R8A7795_PD_A3VC },
{ "3dg-a", 0x100, 0, R8A7795_PD_3DG_A, R8A7795_PD_ALWAYS_ON },
@@ -50,7 +52,27 @@ static const struct rcar_sysc_area r8a7795_areas[] __initconst = {
{ "a3ir", 0x180, 0, R8A7795_PD_A3IR, R8A7795_PD_ALWAYS_ON },
};
+
+ /*
+ * Fixups for R-Car H3 revisions after ES1.x
+ */
+
+static const struct soc_device_attribute r8a7795es1[] __initconst = {
+ { .soc_id = "r8a7795", .revision = "ES1.*" },
+ { /* sentinel */ }
+};
+
+static int __init r8a7795_sysc_init(void)
+{
+ if (!soc_device_match(r8a7795es1))
+ rcar_sysc_nullify(r8a7795_areas, ARRAY_SIZE(r8a7795_areas),
+ R8A7795_PD_A2VC0);
+
+ return 0;
+}
+
const struct rcar_sysc_info r8a7795_sysc_info __initconst = {
+ .init = r8a7795_sysc_init,
.areas = r8a7795_areas,
.num_areas = ARRAY_SIZE(r8a7795_areas),
};
diff --git a/drivers/soc/renesas/rcar-sysc.c b/drivers/soc/renesas/rcar-sysc.c
index 225c35c79d9a..528a13742aeb 100644
--- a/drivers/soc/renesas/rcar-sysc.c
+++ b/drivers/soc/renesas/rcar-sysc.c
@@ -2,7 +2,7 @@
* R-Car SYSC Power management support
*
* Copyright (C) 2014 Magnus Damm
- * Copyright (C) 2015-2016 Glider bvba
+ * Copyright (C) 2015-2017 Glider bvba
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
@@ -334,6 +334,12 @@ static int __init rcar_sysc_pd_init(void)
info = match->data;
+ if (info->init) {
+ error = info->init();
+ if (error)
+ return error;
+ }
+
has_cpg_mstp = of_find_compatible_node(NULL, NULL,
"renesas,cpg-mstp-clocks");
@@ -377,6 +383,11 @@ static int __init rcar_sysc_pd_init(void)
const struct rcar_sysc_area *area = &info->areas[i];
struct rcar_sysc_pd *pd;
+ if (!area->name) {
+ /* Skip NULLified area */
+ continue;
+ }
+
pd = kzalloc(sizeof(*pd) + strlen(area->name) + 1, GFP_KERNEL);
if (!pd) {
error = -ENOMEM;
@@ -406,6 +417,18 @@ out_put:
}
early_initcall(rcar_sysc_pd_init);
+void __init rcar_sysc_nullify(struct rcar_sysc_area *areas,
+ unsigned int num_areas, u8 id)
+{
+ unsigned int i;
+
+ for (i = 0; i < num_areas; i++)
+ if (areas[i].isr_bit == id) {
+ areas[i].name = NULL;
+ return;
+ }
+}
+
void __init rcar_sysc_init(phys_addr_t base, u32 syscier)
{
u32 syscimr;
diff --git a/drivers/soc/renesas/rcar-sysc.h b/drivers/soc/renesas/rcar-sysc.h
index f6e842e2976e..07edb049a401 100644
--- a/drivers/soc/renesas/rcar-sysc.h
+++ b/drivers/soc/renesas/rcar-sysc.h
@@ -46,6 +46,7 @@ struct rcar_sysc_area {
*/
struct rcar_sysc_info {
+ int (*init)(void); /* Optional */
const struct rcar_sysc_area *areas;
unsigned int num_areas;
};
@@ -59,4 +60,13 @@ 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;
+
+
+ /*
+ * Helpers for fixing up power area tables depending on SoC revision
+ */
+
+extern void rcar_sysc_nullify(struct rcar_sysc_area *areas,
+ unsigned int num_areas, u8 id);
+
#endif /* __SOC_RENESAS_RCAR_SYSC_H__ */
diff --git a/drivers/soc/renesas/renesas-soc.c b/drivers/soc/renesas/renesas-soc.c
index b894cf64225b..ca26f13d399c 100644
--- a/drivers/soc/renesas/renesas-soc.c
+++ b/drivers/soc/renesas/renesas-soc.c
@@ -270,4 +270,4 @@ static int __init renesas_soc_init(void)
return 0;
}
-core_initcall(renesas_soc_init);
+early_initcall(renesas_soc_init);