Re: [PATCH 5/7] powerpc/85xx: p2020: Define just one machine description
From: Christophe Leroy <hidden>
Date: 2022-09-26 10:03:29
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Le 19/08/2022 à 21:15, Pali Rohár a écrit :
quoted hunk ↗ jump to hunk
Combine machine descriptions and code of all P2020 boards into just one generic unified P2020 machine description. This allows kernel to boot on any P2020-based board with P2020 DTS file without need to patch kernel and define a new machine description in 85xx powerpc platform directory. Signed-off-by: Pali Rohár <pali@kernel.org> --- arch/powerpc/platforms/85xx/p2020.c | 83 +++++++---------------------- 1 file changed, 19 insertions(+), 64 deletions(-)diff --git a/arch/powerpc/platforms/85xx/p2020.c b/arch/powerpc/platforms/85xx/p2020.c index d327e6c9b838..1a3ffeb47dfc 100644 --- a/arch/powerpc/platforms/85xx/p2020.c +++ b/arch/powerpc/platforms/85xx/p2020.c@@ -154,83 +154,38 @@ static void __init p2020_setup_arch(void) #endif } -#ifdef CONFIG_MPC85xx_DS -machine_arch_initcall(p2020_ds, mpc85xx_common_publish_devices); -#endif /* CONFIG_MPC85xx_DS */ - -#ifdef CONFIG_MPC85xx_RDB -machine_arch_initcall(p2020_rdb, mpc85xx_common_publish_devices); -machine_arch_initcall(p2020_rdb_pc, mpc85xx_common_publish_devices); -#endif /* CONFIG_MPC85xx_RDB */ +machine_arch_initcall(p2020, mpc85xx_common_publish_devices); /* * Called very early, device-tree isn't unflattened */ -#ifdef CONFIG_MPC85xx_DS -static int __init p2020_ds_probe(void) -{ - return !!of_machine_is_compatible("fsl,P2020DS"); -} -#endif /* CONFIG_MPC85xx_DS */ - -#ifdef CONFIG_MPC85xx_RDB -static int __init p2020_rdb_probe(void) -{ - if (of_machine_is_compatible("fsl,P2020RDB")) - return 1; - return 0; -} - -static int __init p2020_rdb_pc_probe(void) +static int __init p2020_probe(void) { - if (of_machine_is_compatible("fsl,P2020RDB-PC")) - return 1; - return 0; + struct device_node *p2020_cpu; + + /* + * There is no common compatible string for all P2020 boards. + * The only common thing is "PowerPC,P2020@0" cpu node. + * So check for P2020 board via this cpu node. + */ + p2020_cpu = of_find_node_by_path("/cpus/PowerPC,P2020@0"); + if (!p2020_cpu) + return 0;
This looks odd. I though all probe were using the compatible, and in fact I have a series in preparation that drops all of_machine_is_compatible() checks in probe functions and do it in the caller instead, after adding a .compatible string in the machine description. Is there really no compatible that can be used for all p2020 ?
+
+ of_node_put(p2020_cpu);
+ return 1;
}
-#endif /* CONFIG_MPC85xx_RDB */
-
-#ifdef CONFIG_MPC85xx_DS
-define_machine(p2020_ds) {
- .name = "P2020 DS",
- .probe = p2020_ds_probe,
- .setup_arch = p2020_setup_arch,
- .init_IRQ = p2020_pic_init,
-#ifdef CONFIG_PCI
- .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
- .pcibios_fixup_phb = fsl_pcibios_fixup_phb,
-#endif
- .get_irq = mpic_get_irq,
- .calibrate_decr = generic_calibrate_decr,
- .progress = udbg_progress,
-};
-#endif /* CONFIG_MPC85xx_DS */
-
-#ifdef CONFIG_MPC85xx_RDB
-define_machine(p2020_rdb) {
- .name = "P2020 RDB",
- .probe = p2020_rdb_probe,
- .setup_arch = p2020_setup_arch,
- .init_IRQ = p2020_pic_init,
-#ifdef CONFIG_PCI
- .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
- .pcibios_fixup_phb = fsl_pcibios_fixup_phb,
-#endif
- .get_irq = mpic_get_irq,
- .calibrate_decr = generic_calibrate_decr,
- .progress = udbg_progress,
-};
-define_machine(p2020_rdb_pc) {
- .name = "P2020RDB-PC",
- .probe = p2020_rdb_pc_probe,
+define_machine(p2020) {
+ .name = "Freescale P2020",
+ .probe = p2020_probe,
.setup_arch = p2020_setup_arch,
.init_IRQ = p2020_pic_init,
#ifdef CONFIG_PCI
.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
- .pcibios_fixup_phb = fsl_pcibios_fixup_phb,
+ .pcibios_fixup_phb = fsl_pcibios_fixup_phb,
#endif
.get_irq = mpic_get_irq,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
};
-#endif /* CONFIG_MPC85xx_RDB */