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Message-Id: <20170216103106.8041-1-alexandre.belloni@free-electrons.com>
Date: Thu, 16 Feb 2017 11:31:06 +0100
From: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To: Nicolas Ferre <nicolas.ferre@...el.com>
Cc: Arnd Bergmann <arnd@...db.de>,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Subject: [PATCH] ARM: at91: move SoC detection to its own driver
To simplify machine init and as the soc_device struct is not used as the
parent for on-chip devices anymore, move SoC detection to its own driver.
Change in dmesg:
- before:
DMA: preallocated 256 KiB pool for atomic coherent allocations
AT91: Detected SoC family: sama5d2
AT91: Detected SoC: sama5d27, revision 0
No ATAGs?
clocksource: tcb_clksrc: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 184217874325 ns
at_xdmac f0010000.dma-controller: 16 channels, mapped at 0xe085b000
SCSI subsystem initialized
- after:
DMA: preallocated 256 KiB pool for atomic coherent allocations
No ATAGs?
clocksource: tcb_clksrc: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 184217874325 ns
at_xdmac f0010000.dma-controller: 16 channels, mapped at 0xe0859000
AT91: Detected SoC family: sama5d2
AT91: Detected SoC: sama5d27, revision 0
SCSI subsystem initialized
Suggested-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
---
arch/arm/mach-at91/Makefile | 1 -
arch/arm/mach-at91/at91rm9200.c | 15 +-
arch/arm/mach-at91/at91sam9.c | 46 +----
arch/arm/mach-at91/sama5.c | 52 +-----
arch/arm/mach-at91/soc.c | 142 ---------------
drivers/soc/Kconfig | 1 +
drivers/soc/Makefile | 1 +
drivers/soc/atmel/Kconfig | 6 +
drivers/soc/atmel/Makefile | 1 +
drivers/soc/atmel/soc.c | 231 ++++++++++++++++++++++++
{arch/arm/mach-at91 => drivers/soc/atmel}/soc.h | 0
11 files changed, 243 insertions(+), 253 deletions(-)
delete mode 100644 arch/arm/mach-at91/soc.c
create mode 100644 drivers/soc/atmel/Kconfig
create mode 100644 drivers/soc/atmel/Makefile
create mode 100644 drivers/soc/atmel/soc.c
rename {arch/arm/mach-at91 => drivers/soc/atmel}/soc.h (100%)
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index c5bbf8bb8c0f..ae913484712e 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -1,7 +1,6 @@
#
# Makefile for the linux kernel.
#
-obj-y := soc.o
# CPU-specific support
obj-$(CONFIG_SOC_AT91RM9200) += at91rm9200.o
diff --git a/arch/arm/mach-at91/at91rm9200.c b/arch/arm/mach-at91/at91rm9200.c
index d068ec3cd1f6..656ad409a253 100644
--- a/arch/arm/mach-at91/at91rm9200.c
+++ b/arch/arm/mach-at91/at91rm9200.c
@@ -14,23 +14,10 @@
#include <asm/mach/arch.h>
#include "generic.h"
-#include "soc.h"
-
-static const struct at91_soc rm9200_socs[] = {
- AT91_SOC(AT91RM9200_CIDR_MATCH, 0, "at91rm9200 BGA", "at91rm9200"),
- { /* sentinel */ },
-};
static void __init at91rm9200_dt_device_init(void)
{
- struct soc_device *soc;
- struct device *soc_dev = NULL;
-
- soc = at91_soc_init(rm9200_socs);
- if (soc != NULL)
- soc_dev = soc_device_to_device(soc);
-
- of_platform_default_populate(NULL, NULL, soc_dev);
+ of_platform_default_populate(NULL, NULL, NULL);
at91rm9200_pm_init();
}
diff --git a/arch/arm/mach-at91/at91sam9.c b/arch/arm/mach-at91/at91sam9.c
index ba28e9cc584d..b5280d42dece 100644
--- a/arch/arm/mach-at91/at91sam9.c
+++ b/arch/arm/mach-at91/at91sam9.c
@@ -14,54 +14,10 @@
#include <asm/system_misc.h>
#include "generic.h"
-#include "soc.h"
-
-static const struct at91_soc at91sam9_socs[] = {
- AT91_SOC(AT91SAM9260_CIDR_MATCH, 0, "at91sam9260", NULL),
- AT91_SOC(AT91SAM9261_CIDR_MATCH, 0, "at91sam9261", NULL),
- AT91_SOC(AT91SAM9263_CIDR_MATCH, 0, "at91sam9263", NULL),
- AT91_SOC(AT91SAM9G20_CIDR_MATCH, 0, "at91sam9g20", NULL),
- AT91_SOC(AT91SAM9RL64_CIDR_MATCH, 0, "at91sam9rl64", NULL),
- AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91SAM9M11_EXID_MATCH,
- "at91sam9m11", "at91sam9g45"),
- AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91SAM9M10_EXID_MATCH,
- "at91sam9m10", "at91sam9g45"),
- AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91SAM9G46_EXID_MATCH,
- "at91sam9g46", "at91sam9g45"),
- AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91SAM9G45_EXID_MATCH,
- "at91sam9g45", "at91sam9g45"),
- AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91SAM9G15_EXID_MATCH,
- "at91sam9g15", "at91sam9x5"),
- AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91SAM9G35_EXID_MATCH,
- "at91sam9g35", "at91sam9x5"),
- AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91SAM9X35_EXID_MATCH,
- "at91sam9x35", "at91sam9x5"),
- AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91SAM9G25_EXID_MATCH,
- "at91sam9g25", "at91sam9x5"),
- AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91SAM9X25_EXID_MATCH,
- "at91sam9x25", "at91sam9x5"),
- AT91_SOC(AT91SAM9N12_CIDR_MATCH, AT91SAM9CN12_EXID_MATCH,
- "at91sam9cn12", "at91sam9n12"),
- AT91_SOC(AT91SAM9N12_CIDR_MATCH, AT91SAM9N12_EXID_MATCH,
- "at91sam9n12", "at91sam9n12"),
- AT91_SOC(AT91SAM9N12_CIDR_MATCH, AT91SAM9CN11_EXID_MATCH,
- "at91sam9cn11", "at91sam9n12"),
- AT91_SOC(AT91SAM9XE128_CIDR_MATCH, 0, "at91sam9xe128", "at91sam9xe128"),
- AT91_SOC(AT91SAM9XE256_CIDR_MATCH, 0, "at91sam9xe256", "at91sam9xe256"),
- AT91_SOC(AT91SAM9XE512_CIDR_MATCH, 0, "at91sam9xe512", "at91sam9xe512"),
- { /* sentinel */ },
-};
static void __init at91sam9_common_init(void)
{
- struct soc_device *soc;
- struct device *soc_dev = NULL;
-
- soc = at91_soc_init(at91sam9_socs);
- if (soc != NULL)
- soc_dev = soc_device_to_device(soc);
-
- of_platform_default_populate(NULL, NULL, soc_dev);
+ of_platform_default_populate(NULL, NULL, NULL);
}
static void __init at91sam9_dt_device_init(void)
diff --git a/arch/arm/mach-at91/sama5.c b/arch/arm/mach-at91/sama5.c
index b272c45b400f..6d157d0ead8e 100644
--- a/arch/arm/mach-at91/sama5.c
+++ b/arch/arm/mach-at91/sama5.c
@@ -15,60 +15,10 @@
#include <asm/system_misc.h>
#include "generic.h"
-#include "soc.h"
-
-static const struct at91_soc sama5_socs[] = {
- AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D21CU_EXID_MATCH,
- "sama5d21", "sama5d2"),
- AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D22CU_EXID_MATCH,
- "sama5d22", "sama5d2"),
- AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D23CU_EXID_MATCH,
- "sama5d23", "sama5d2"),
- AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D24CX_EXID_MATCH,
- "sama5d24", "sama5d2"),
- AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D24CU_EXID_MATCH,
- "sama5d24", "sama5d2"),
- AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D26CU_EXID_MATCH,
- "sama5d26", "sama5d2"),
- AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D27CU_EXID_MATCH,
- "sama5d27", "sama5d2"),
- AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D27CN_EXID_MATCH,
- "sama5d27", "sama5d2"),
- AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D28CU_EXID_MATCH,
- "sama5d28", "sama5d2"),
- AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D28CN_EXID_MATCH,
- "sama5d28", "sama5d2"),
- AT91_SOC(SAMA5D3_CIDR_MATCH, SAMA5D31_EXID_MATCH,
- "sama5d31", "sama5d3"),
- AT91_SOC(SAMA5D3_CIDR_MATCH, SAMA5D33_EXID_MATCH,
- "sama5d33", "sama5d3"),
- AT91_SOC(SAMA5D3_CIDR_MATCH, SAMA5D34_EXID_MATCH,
- "sama5d34", "sama5d3"),
- AT91_SOC(SAMA5D3_CIDR_MATCH, SAMA5D35_EXID_MATCH,
- "sama5d35", "sama5d3"),
- AT91_SOC(SAMA5D3_CIDR_MATCH, SAMA5D36_EXID_MATCH,
- "sama5d36", "sama5d3"),
- AT91_SOC(SAMA5D4_CIDR_MATCH, SAMA5D41_EXID_MATCH,
- "sama5d41", "sama5d4"),
- AT91_SOC(SAMA5D4_CIDR_MATCH, SAMA5D42_EXID_MATCH,
- "sama5d42", "sama5d4"),
- AT91_SOC(SAMA5D4_CIDR_MATCH, SAMA5D43_EXID_MATCH,
- "sama5d43", "sama5d4"),
- AT91_SOC(SAMA5D4_CIDR_MATCH, SAMA5D44_EXID_MATCH,
- "sama5d44", "sama5d4"),
- { /* sentinel */ },
-};
static void __init sama5_dt_device_init(void)
{
- struct soc_device *soc;
- struct device *soc_dev = NULL;
-
- soc = at91_soc_init(sama5_socs);
- if (soc != NULL)
- soc_dev = soc_device_to_device(soc);
-
- of_platform_default_populate(NULL, NULL, soc_dev);
+ of_platform_default_populate(NULL, NULL, NULL);
sama5_pm_init();
}
diff --git a/arch/arm/mach-at91/soc.c b/arch/arm/mach-at91/soc.c
deleted file mode 100644
index c6fda75ddb89..000000000000
--- a/arch/arm/mach-at91/soc.c
+++ /dev/null
@@ -1,142 +0,0 @@
-/*
- * Copyright (C) 2015 Atmel
- *
- * Alexandre Belloni <alexandre.belloni@...e-electrons.com
- * Boris Brezillon <boris.brezillon@...e-electrons.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) "AT91: " fmt
-
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_platform.h>
-#include <linux/slab.h>
-#include <linux/sys_soc.h>
-
-#include "soc.h"
-
-#define AT91_DBGU_CIDR 0x40
-#define AT91_DBGU_EXID 0x44
-#define AT91_CHIPID_CIDR 0x00
-#define AT91_CHIPID_EXID 0x04
-#define AT91_CIDR_VERSION(x) ((x) & 0x1f)
-#define AT91_CIDR_EXT BIT(31)
-#define AT91_CIDR_MATCH_MASK 0x7fffffe0
-
-static int __init at91_get_cidr_exid_from_dbgu(u32 *cidr, u32 *exid)
-{
- struct device_node *np;
- void __iomem *regs;
-
- np = of_find_compatible_node(NULL, NULL, "atmel,at91rm9200-dbgu");
- if (!np)
- np = of_find_compatible_node(NULL, NULL,
- "atmel,at91sam9260-dbgu");
- if (!np)
- return -ENODEV;
-
- regs = of_iomap(np, 0);
- of_node_put(np);
-
- if (!regs) {
- pr_warn("Could not map DBGU iomem range");
- return -ENXIO;
- }
-
- *cidr = readl(regs + AT91_DBGU_CIDR);
- *exid = readl(regs + AT91_DBGU_EXID);
-
- iounmap(regs);
-
- return 0;
-}
-
-static int __init at91_get_cidr_exid_from_chipid(u32 *cidr, u32 *exid)
-{
- struct device_node *np;
- void __iomem *regs;
-
- np = of_find_compatible_node(NULL, NULL, "atmel,sama5d2-chipid");
- if (!np)
- return -ENODEV;
-
- regs = of_iomap(np, 0);
- of_node_put(np);
-
- if (!regs) {
- pr_warn("Could not map DBGU iomem range");
- return -ENXIO;
- }
-
- *cidr = readl(regs + AT91_CHIPID_CIDR);
- *exid = readl(regs + AT91_CHIPID_EXID);
-
- iounmap(regs);
-
- return 0;
-}
-
-struct soc_device * __init at91_soc_init(const struct at91_soc *socs)
-{
- struct soc_device_attribute *soc_dev_attr;
- const struct at91_soc *soc;
- struct soc_device *soc_dev;
- u32 cidr, exid;
- int ret;
-
- /*
- * With SAMA5D2 and later SoCs, CIDR and EXID registers are no more
- * in the dbgu device but in the chipid device whose purpose is only
- * to expose these two registers.
- */
- ret = at91_get_cidr_exid_from_dbgu(&cidr, &exid);
- if (ret)
- ret = at91_get_cidr_exid_from_chipid(&cidr, &exid);
- if (ret) {
- if (ret == -ENODEV)
- pr_warn("Could not find identification node");
- return NULL;
- }
-
- for (soc = socs; soc->name; soc++) {
- if (soc->cidr_match != (cidr & AT91_CIDR_MATCH_MASK))
- continue;
-
- if (!(cidr & AT91_CIDR_EXT) || soc->exid_match == exid)
- break;
- }
-
- if (!soc->name) {
- pr_warn("Could not find matching SoC description\n");
- return NULL;
- }
-
- soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
- if (!soc_dev_attr)
- return NULL;
-
- soc_dev_attr->family = soc->family;
- soc_dev_attr->soc_id = soc->name;
- soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%X",
- AT91_CIDR_VERSION(cidr));
- soc_dev = soc_device_register(soc_dev_attr);
- if (IS_ERR(soc_dev)) {
- kfree(soc_dev_attr->revision);
- kfree(soc_dev_attr);
- pr_warn("Could not register SoC device\n");
- return NULL;
- }
-
- if (soc->family)
- pr_info("Detected SoC family: %s\n", soc->family);
- pr_info("Detected SoC: %s, revision %X\n", soc->name,
- AT91_CIDR_VERSION(cidr));
-
- return soc_dev;
-}
diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig
index e6e90e80519a..d7728ad4574f 100644
--- a/drivers/soc/Kconfig
+++ b/drivers/soc/Kconfig
@@ -1,5 +1,6 @@
menu "SOC (System On Chip) specific Drivers"
+source "drivers/soc/atmel/Kconfig"
source "drivers/soc/bcm/Kconfig"
source "drivers/soc/fsl/qbman/Kconfig"
source "drivers/soc/fsl/qe/Kconfig"
diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile
index 50c23d0bd457..aca402073e7e 100644
--- a/drivers/soc/Makefile
+++ b/drivers/soc/Makefile
@@ -2,6 +2,7 @@
# Makefile for the Linux Kernel SOC specific device drivers.
#
+obj-$(CONFIG_ARCH_AT91) += atmel/
obj-y += bcm/
obj-$(CONFIG_ARCH_DOVE) += dove/
obj-$(CONFIG_MACH_DOVE) += dove/
diff --git a/drivers/soc/atmel/Kconfig b/drivers/soc/atmel/Kconfig
new file mode 100644
index 000000000000..6242ebb41abb
--- /dev/null
+++ b/drivers/soc/atmel/Kconfig
@@ -0,0 +1,6 @@
+config AT91_SOC_ID
+ bool "SoC bus for Atmel ARM SoCs"
+ depends on ARCH_AT91 || COMPILE_TEST
+ default ARCH_AT91
+ help
+ Include support for the SoC bus on the Atmel ARM SoCs.
diff --git a/drivers/soc/atmel/Makefile b/drivers/soc/atmel/Makefile
new file mode 100644
index 000000000000..2d92f32e4ea5
--- /dev/null
+++ b/drivers/soc/atmel/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_AT91_SOC_ID) += soc.o
diff --git a/drivers/soc/atmel/soc.c b/drivers/soc/atmel/soc.c
new file mode 100644
index 000000000000..4790094b498e
--- /dev/null
+++ b/drivers/soc/atmel/soc.c
@@ -0,0 +1,231 @@
+/*
+ * Copyright (C) 2015 Atmel
+ *
+ * Alexandre Belloni <alexandre.belloni@...e-electrons.com
+ * Boris Brezillon <boris.brezillon@...e-electrons.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) "AT91: " fmt
+
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/slab.h>
+#include <linux/sys_soc.h>
+
+#include "soc.h"
+
+#define AT91_DBGU_CIDR 0x40
+#define AT91_DBGU_EXID 0x44
+#define AT91_CHIPID_CIDR 0x00
+#define AT91_CHIPID_EXID 0x04
+#define AT91_CIDR_VERSION(x) ((x) & 0x1f)
+#define AT91_CIDR_EXT BIT(31)
+#define AT91_CIDR_MATCH_MASK 0x7fffffe0
+
+static const struct at91_soc __initconst socs[] = {
+#ifdef CONFIG_SOC_AT91RM9200
+ AT91_SOC(AT91RM9200_CIDR_MATCH, 0, "at91rm9200 BGA", "at91rm9200"),
+#endif
+#ifdef CONFIG_SOC_AT91SAM9
+ AT91_SOC(AT91SAM9260_CIDR_MATCH, 0, "at91sam9260", NULL),
+ AT91_SOC(AT91SAM9261_CIDR_MATCH, 0, "at91sam9261", NULL),
+ AT91_SOC(AT91SAM9263_CIDR_MATCH, 0, "at91sam9263", NULL),
+ AT91_SOC(AT91SAM9G20_CIDR_MATCH, 0, "at91sam9g20", NULL),
+ AT91_SOC(AT91SAM9RL64_CIDR_MATCH, 0, "at91sam9rl64", NULL),
+ AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91SAM9M11_EXID_MATCH,
+ "at91sam9m11", "at91sam9g45"),
+ AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91SAM9M10_EXID_MATCH,
+ "at91sam9m10", "at91sam9g45"),
+ AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91SAM9G46_EXID_MATCH,
+ "at91sam9g46", "at91sam9g45"),
+ AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91SAM9G45_EXID_MATCH,
+ "at91sam9g45", "at91sam9g45"),
+ AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91SAM9G15_EXID_MATCH,
+ "at91sam9g15", "at91sam9x5"),
+ AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91SAM9G35_EXID_MATCH,
+ "at91sam9g35", "at91sam9x5"),
+ AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91SAM9X35_EXID_MATCH,
+ "at91sam9x35", "at91sam9x5"),
+ AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91SAM9G25_EXID_MATCH,
+ "at91sam9g25", "at91sam9x5"),
+ AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91SAM9X25_EXID_MATCH,
+ "at91sam9x25", "at91sam9x5"),
+ AT91_SOC(AT91SAM9N12_CIDR_MATCH, AT91SAM9CN12_EXID_MATCH,
+ "at91sam9cn12", "at91sam9n12"),
+ AT91_SOC(AT91SAM9N12_CIDR_MATCH, AT91SAM9N12_EXID_MATCH,
+ "at91sam9n12", "at91sam9n12"),
+ AT91_SOC(AT91SAM9N12_CIDR_MATCH, AT91SAM9CN11_EXID_MATCH,
+ "at91sam9cn11", "at91sam9n12"),
+ AT91_SOC(AT91SAM9XE128_CIDR_MATCH, 0, "at91sam9xe128", "at91sam9xe128"),
+ AT91_SOC(AT91SAM9XE256_CIDR_MATCH, 0, "at91sam9xe256", "at91sam9xe256"),
+ AT91_SOC(AT91SAM9XE512_CIDR_MATCH, 0, "at91sam9xe512", "at91sam9xe512"),
+#endif
+#ifdef CONFIG_SOC_SAMA5
+ AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D21CU_EXID_MATCH,
+ "sama5d21", "sama5d2"),
+ AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D22CU_EXID_MATCH,
+ "sama5d22", "sama5d2"),
+ AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D23CU_EXID_MATCH,
+ "sama5d23", "sama5d2"),
+ AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D24CX_EXID_MATCH,
+ "sama5d24", "sama5d2"),
+ AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D24CU_EXID_MATCH,
+ "sama5d24", "sama5d2"),
+ AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D26CU_EXID_MATCH,
+ "sama5d26", "sama5d2"),
+ AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D27CU_EXID_MATCH,
+ "sama5d27", "sama5d2"),
+ AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D27CN_EXID_MATCH,
+ "sama5d27", "sama5d2"),
+ AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D28CU_EXID_MATCH,
+ "sama5d28", "sama5d2"),
+ AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D28CN_EXID_MATCH,
+ "sama5d28", "sama5d2"),
+ AT91_SOC(SAMA5D3_CIDR_MATCH, SAMA5D31_EXID_MATCH,
+ "sama5d31", "sama5d3"),
+ AT91_SOC(SAMA5D3_CIDR_MATCH, SAMA5D33_EXID_MATCH,
+ "sama5d33", "sama5d3"),
+ AT91_SOC(SAMA5D3_CIDR_MATCH, SAMA5D34_EXID_MATCH,
+ "sama5d34", "sama5d3"),
+ AT91_SOC(SAMA5D3_CIDR_MATCH, SAMA5D35_EXID_MATCH,
+ "sama5d35", "sama5d3"),
+ AT91_SOC(SAMA5D3_CIDR_MATCH, SAMA5D36_EXID_MATCH,
+ "sama5d36", "sama5d3"),
+ AT91_SOC(SAMA5D4_CIDR_MATCH, SAMA5D41_EXID_MATCH,
+ "sama5d41", "sama5d4"),
+ AT91_SOC(SAMA5D4_CIDR_MATCH, SAMA5D42_EXID_MATCH,
+ "sama5d42", "sama5d4"),
+ AT91_SOC(SAMA5D4_CIDR_MATCH, SAMA5D43_EXID_MATCH,
+ "sama5d43", "sama5d4"),
+ AT91_SOC(SAMA5D4_CIDR_MATCH, SAMA5D44_EXID_MATCH,
+ "sama5d44", "sama5d4"),
+#endif
+ { /* sentinel */ },
+};
+
+static int __init at91_get_cidr_exid_from_dbgu(u32 *cidr, u32 *exid)
+{
+ struct device_node *np;
+ void __iomem *regs;
+
+ np = of_find_compatible_node(NULL, NULL, "atmel,at91rm9200-dbgu");
+ if (!np)
+ np = of_find_compatible_node(NULL, NULL,
+ "atmel,at91sam9260-dbgu");
+ if (!np)
+ return -ENODEV;
+
+ regs = of_iomap(np, 0);
+ of_node_put(np);
+
+ if (!regs) {
+ pr_warn("Could not map DBGU iomem range");
+ return -ENXIO;
+ }
+
+ *cidr = readl(regs + AT91_DBGU_CIDR);
+ *exid = readl(regs + AT91_DBGU_EXID);
+
+ iounmap(regs);
+
+ return 0;
+}
+
+static int __init at91_get_cidr_exid_from_chipid(u32 *cidr, u32 *exid)
+{
+ struct device_node *np;
+ void __iomem *regs;
+
+ np = of_find_compatible_node(NULL, NULL, "atmel,sama5d2-chipid");
+ if (!np)
+ return -ENODEV;
+
+ regs = of_iomap(np, 0);
+ of_node_put(np);
+
+ if (!regs) {
+ pr_warn("Could not map DBGU iomem range");
+ return -ENXIO;
+ }
+
+ *cidr = readl(regs + AT91_CHIPID_CIDR);
+ *exid = readl(regs + AT91_CHIPID_EXID);
+
+ iounmap(regs);
+
+ return 0;
+}
+
+struct soc_device * __init at91_soc_init(const struct at91_soc *socs)
+{
+ struct soc_device_attribute *soc_dev_attr;
+ const struct at91_soc *soc;
+ struct soc_device *soc_dev;
+ u32 cidr, exid;
+ int ret;
+
+ /*
+ * With SAMA5D2 and later SoCs, CIDR and EXID registers are no more
+ * in the dbgu device but in the chipid device whose purpose is only
+ * to expose these two registers.
+ */
+ ret = at91_get_cidr_exid_from_dbgu(&cidr, &exid);
+ if (ret)
+ ret = at91_get_cidr_exid_from_chipid(&cidr, &exid);
+ if (ret) {
+ if (ret == -ENODEV)
+ pr_warn("Could not find identification node");
+ return NULL;
+ }
+
+ for (soc = socs; soc->name; soc++) {
+ if (soc->cidr_match != (cidr & AT91_CIDR_MATCH_MASK))
+ continue;
+
+ if (!(cidr & AT91_CIDR_EXT) || soc->exid_match == exid)
+ break;
+ }
+
+ if (!soc->name) {
+ pr_warn("Could not find matching SoC description\n");
+ return NULL;
+ }
+
+ soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+ if (!soc_dev_attr)
+ return NULL;
+
+ soc_dev_attr->family = soc->family;
+ soc_dev_attr->soc_id = soc->name;
+ soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%X",
+ AT91_CIDR_VERSION(cidr));
+ soc_dev = soc_device_register(soc_dev_attr);
+ if (IS_ERR(soc_dev)) {
+ kfree(soc_dev_attr->revision);
+ kfree(soc_dev_attr);
+ pr_warn("Could not register SoC device\n");
+ return NULL;
+ }
+
+ if (soc->family)
+ pr_info("Detected SoC family: %s\n", soc->family);
+ pr_info("Detected SoC: %s, revision %X\n", soc->name,
+ AT91_CIDR_VERSION(cidr));
+
+ return soc_dev;
+}
+
+static int __init atmel_soc_device_init(void)
+{
+ at91_soc_init(socs);
+
+ return 0;
+}
+subsys_initcall(atmel_soc_device_init);
diff --git a/arch/arm/mach-at91/soc.h b/drivers/soc/atmel/soc.h
similarity index 100%
rename from arch/arm/mach-at91/soc.h
rename to drivers/soc/atmel/soc.h
--
2.11.0
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