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Message-ID: <9da79892e7ff433095a7bf42e86aef02ab86b5c1.1701878821.git.christophe.leroy@csgroup.eu>
Date: Wed, 6 Dec 2023 17:13:34 +0100
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Michael Ellerman <mpe@...erman.id.au>,
Nicholas Piggin <npiggin@...il.com>,
Rob Herring <robh+dt@...nel.org>,
Frank Rowand <frowand.list@...il.com>
Cc: Christophe Leroy <christophe.leroy@...roup.eu>,
linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
devicetree@...r.kernel.org
Subject: [PATCH v1 3/4] powerpc/machdep: Define 'compatibles' property in ppc_md and use it
Most probe functions that do not use the 'compatible' string do
nothing else than checking whether the machine is compatible with
one of the strings in a NULL terminated table of strings.
Define that table of strings in ppc_md structure and check it directly
from probe_machine() instead of using ppc_md.probe() for that.
Keep checking in ppc_md.probe() only for more complex probing.
All .compatible could be replaced with a single element NULL
terminated list but that's not worth the churn. Can be do incrementaly
in follow-up patches.
Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
arch/powerpc/include/asm/machdep.h | 1 +
arch/powerpc/kernel/setup-common.c | 2 ++
arch/powerpc/platforms/40x/ppc40x_simple.c | 9 +++------
arch/powerpc/platforms/512x/mpc512x_generic.c | 4 +---
arch/powerpc/platforms/52xx/lite5200.c | 10 +---------
arch/powerpc/platforms/52xx/mpc5200_simple.c | 10 +---------
arch/powerpc/platforms/83xx/mpc830x_rdb.c | 10 +---------
arch/powerpc/platforms/83xx/mpc831x_rdb.c | 10 +---------
arch/powerpc/platforms/83xx/mpc837x_rdb.c | 10 +---------
arch/powerpc/platforms/85xx/corenet_generic.c | 2 +-
arch/powerpc/platforms/85xx/tqm85xx.c | 10 +---------
11 files changed, 14 insertions(+), 64 deletions(-)
diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h
index d31a5ec1550d..1862f94335ee 100644
--- a/arch/powerpc/include/asm/machdep.h
+++ b/arch/powerpc/include/asm/machdep.h
@@ -22,6 +22,7 @@ struct pci_host_bridge;
struct machdep_calls {
const char *name;
const char *compatible;
+ const char * const *compatibles;
#ifdef CONFIG_PPC64
#ifdef CONFIG_PM
void (*iommu_restore)(void);
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 9b142b9d5187..ec02f9d8f55d 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -616,6 +616,8 @@ static __init void probe_machine(void)
DBG(" %s ...\n", machine_id->name);
if (machine_id->compatible && !of_machine_is_compatible(machine_id->compatible))
continue;
+ if (machine_id->compatibles && !of_machine_compatible_match(machine_id->compatibles))
+ continue;
memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls));
if (ppc_md.probe && !ppc_md.probe())
continue;
diff --git a/arch/powerpc/platforms/40x/ppc40x_simple.c b/arch/powerpc/platforms/40x/ppc40x_simple.c
index e454e9d2eff1..294ab2728588 100644
--- a/arch/powerpc/platforms/40x/ppc40x_simple.c
+++ b/arch/powerpc/platforms/40x/ppc40x_simple.c
@@ -59,16 +59,13 @@ static const char * const board[] __initconst = {
static int __init ppc40x_probe(void)
{
- if (of_device_compatible_match(of_root, board)) {
- pci_set_flags(PCI_REASSIGN_ALL_RSRC);
- return 1;
- }
-
- return 0;
+ pci_set_flags(PCI_REASSIGN_ALL_RSRC);
+ return 1;
}
define_machine(ppc40x_simple) {
.name = "PowerPC 40x Platform",
+ .compatibles = board,
.probe = ppc40x_probe,
.progress = udbg_progress,
.init_IRQ = uic_init_tree,
diff --git a/arch/powerpc/platforms/512x/mpc512x_generic.c b/arch/powerpc/platforms/512x/mpc512x_generic.c
index 0d58ab257cd9..d4fa6c302ccf 100644
--- a/arch/powerpc/platforms/512x/mpc512x_generic.c
+++ b/arch/powerpc/platforms/512x/mpc512x_generic.c
@@ -32,9 +32,6 @@ static const char * const board[] __initconst = {
*/
static int __init mpc512x_generic_probe(void)
{
- if (!of_device_compatible_match(of_root, board))
- return 0;
-
mpc512x_init_early();
return 1;
@@ -42,6 +39,7 @@ static int __init mpc512x_generic_probe(void)
define_machine(mpc512x_generic) {
.name = "MPC512x generic",
+ .compatibles = board,
.probe = mpc512x_generic_probe,
.init = mpc512x_init,
.setup_arch = mpc512x_setup_arch,
diff --git a/arch/powerpc/platforms/52xx/lite5200.c b/arch/powerpc/platforms/52xx/lite5200.c
index 0fd67b3ffc3e..0a161d82a3a8 100644
--- a/arch/powerpc/platforms/52xx/lite5200.c
+++ b/arch/powerpc/platforms/52xx/lite5200.c
@@ -172,17 +172,9 @@ static const char * const board[] __initconst = {
NULL,
};
-/*
- * Called very early, MMU is off, device-tree isn't unflattened
- */
-static int __init lite5200_probe(void)
-{
- return of_device_compatible_match(of_root, board);
-}
-
define_machine(lite5200) {
.name = "lite5200",
- .probe = lite5200_probe,
+ .compatibles = board,
.setup_arch = lite5200_setup_arch,
.discover_phbs = mpc52xx_setup_pci,
.init = mpc52xx_declare_of_platform_devices,
diff --git a/arch/powerpc/platforms/52xx/mpc5200_simple.c b/arch/powerpc/platforms/52xx/mpc5200_simple.c
index f1e85e86f5e5..7e0e4c34a40b 100644
--- a/arch/powerpc/platforms/52xx/mpc5200_simple.c
+++ b/arch/powerpc/platforms/52xx/mpc5200_simple.c
@@ -59,17 +59,9 @@ static const char *board[] __initdata = {
NULL
};
-/*
- * Called very early, MMU is off, device-tree isn't unflattened
- */
-static int __init mpc5200_simple_probe(void)
-{
- return of_device_compatible_match(of_root, board);
-}
-
define_machine(mpc5200_simple_platform) {
.name = "mpc5200-simple-platform",
- .probe = mpc5200_simple_probe,
+ .compatibles = board,
.setup_arch = mpc5200_simple_setup_arch,
.discover_phbs = mpc52xx_setup_pci,
.init = mpc52xx_declare_of_platform_devices,
diff --git a/arch/powerpc/platforms/83xx/mpc830x_rdb.c b/arch/powerpc/platforms/83xx/mpc830x_rdb.c
index 534bb227480d..63b6d213726a 100644
--- a/arch/powerpc/platforms/83xx/mpc830x_rdb.c
+++ b/arch/powerpc/platforms/83xx/mpc830x_rdb.c
@@ -34,19 +34,11 @@ static const char *board[] __initdata = {
NULL
};
-/*
- * Called very early, MMU is off, device-tree isn't unflattened
- */
-static int __init mpc830x_rdb_probe(void)
-{
- return of_device_compatible_match(of_root, board);
-}
-
machine_device_initcall(mpc830x_rdb, mpc83xx_declare_of_platform_devices);
define_machine(mpc830x_rdb) {
.name = "MPC830x RDB",
- .probe = mpc830x_rdb_probe,
+ .compatibles = board,
.setup_arch = mpc830x_rdb_setup_arch,
.discover_phbs = mpc83xx_setup_pci,
.init_IRQ = mpc83xx_ipic_init_IRQ,
diff --git a/arch/powerpc/platforms/83xx/mpc831x_rdb.c b/arch/powerpc/platforms/83xx/mpc831x_rdb.c
index 7b901ab3b864..5c39966762e4 100644
--- a/arch/powerpc/platforms/83xx/mpc831x_rdb.c
+++ b/arch/powerpc/platforms/83xx/mpc831x_rdb.c
@@ -34,19 +34,11 @@ static const char *board[] __initdata = {
NULL
};
-/*
- * Called very early, MMU is off, device-tree isn't unflattened
- */
-static int __init mpc831x_rdb_probe(void)
-{
- return of_device_compatible_match(of_root, board);
-}
-
machine_device_initcall(mpc831x_rdb, mpc83xx_declare_of_platform_devices);
define_machine(mpc831x_rdb) {
.name = "MPC831x RDB",
- .probe = mpc831x_rdb_probe,
+ .compatibles = board,
.setup_arch = mpc831x_rdb_setup_arch,
.discover_phbs = mpc83xx_setup_pci,
.init_IRQ = mpc83xx_ipic_init_IRQ,
diff --git a/arch/powerpc/platforms/83xx/mpc837x_rdb.c b/arch/powerpc/platforms/83xx/mpc837x_rdb.c
index 39e78018dd0b..45823e147933 100644
--- a/arch/powerpc/platforms/83xx/mpc837x_rdb.c
+++ b/arch/powerpc/platforms/83xx/mpc837x_rdb.c
@@ -61,17 +61,9 @@ static const char * const board[] __initconst = {
NULL
};
-/*
- * Called very early, MMU is off, device-tree isn't unflattened
- */
-static int __init mpc837x_rdb_probe(void)
-{
- return of_device_compatible_match(of_root, board);
-}
-
define_machine(mpc837x_rdb) {
.name = "MPC837x RDB/WLAN",
- .probe = mpc837x_rdb_probe,
+ .compatibles = board,
.setup_arch = mpc837x_rdb_setup_arch,
.discover_phbs = mpc83xx_setup_pci,
.init_IRQ = mpc83xx_ipic_init_IRQ,
diff --git a/arch/powerpc/platforms/85xx/corenet_generic.c b/arch/powerpc/platforms/85xx/corenet_generic.c
index 645fcca77cde..c44400e95f55 100644
--- a/arch/powerpc/platforms/85xx/corenet_generic.c
+++ b/arch/powerpc/platforms/85xx/corenet_generic.c
@@ -149,7 +149,7 @@ static int __init corenet_generic_probe(void)
extern struct smp_ops_t smp_85xx_ops;
#endif
- if (of_device_compatible_match(of_root, boards))
+ if (of_machine_compatible_match(boards))
return 1;
/* Check if we're running under the Freescale hypervisor */
diff --git a/arch/powerpc/platforms/85xx/tqm85xx.c b/arch/powerpc/platforms/85xx/tqm85xx.c
index 6be1b9809db6..f74d446c53f0 100644
--- a/arch/powerpc/platforms/85xx/tqm85xx.c
+++ b/arch/powerpc/platforms/85xx/tqm85xx.c
@@ -112,17 +112,9 @@ static const char * const board[] __initconst = {
NULL
};
-/*
- * Called very early, device-tree isn't unflattened
- */
-static int __init tqm85xx_probe(void)
-{
- return of_device_compatible_match(of_root, board);
-}
-
define_machine(tqm85xx) {
.name = "TQM85xx",
- .probe = tqm85xx_probe,
+ .compatibles = board,
.setup_arch = tqm85xx_setup_arch,
.init_IRQ = tqm85xx_pic_init,
.show_cpuinfo = tqm85xx_show_cpuinfo,
--
2.41.0
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