diff options
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/boot/dts/angel4.dts | 2 | ||||
| -rw-r--r-- | arch/arc/include/asm/processor.h | 2 | ||||
| -rw-r--r-- | arch/arc/kernel/perf_event.c | 7 | ||||
| -rw-r--r-- | arch/arc/plat-arcfpga/Kconfig | 7 | ||||
| -rw-r--r-- | arch/arc/plat-arcfpga/platform.c | 97 |
5 files changed, 8 insertions, 107 deletions
diff --git a/arch/arc/boot/dts/angel4.dts b/arch/arc/boot/dts/angel4.dts index 5bb2fdaca02f..6b57475967a6 100644 --- a/arch/arc/boot/dts/angel4.dts +++ b/arch/arc/boot/dts/angel4.dts @@ -17,7 +17,7 @@ interrupt-parent = <&intc>; chosen { - bootargs = "console=ttyARC0,115200n8 earlyprintk=ttyARC0"; + bootargs = "earlycon=arc_uart,mmio32,0xc0fc1000,115200n8 console=ttyARC0,115200n8"; }; aliases { diff --git a/arch/arc/include/asm/processor.h b/arch/arc/include/asm/processor.h index d99f9b37cd15..82588f3ba77f 100644 --- a/arch/arc/include/asm/processor.h +++ b/arch/arc/include/asm/processor.h @@ -62,6 +62,8 @@ unsigned long thread_saved_pc(struct task_struct *t); #define cpu_relax() do { } while (0) #endif +#define cpu_relax_lowlatency() cpu_relax() + #define copy_segments(tsk, mm) do { } while (0) #define release_segments(mm) do { } while (0) diff --git a/arch/arc/kernel/perf_event.c b/arch/arc/kernel/perf_event.c index 63177e4cb66d..b9a5685a990e 100644 --- a/arch/arc/kernel/perf_event.c +++ b/arch/arc/kernel/perf_event.c @@ -99,10 +99,6 @@ static int arc_pmu_event_init(struct perf_event *event) struct hw_perf_event *hwc = &event->hw; int ret; - /* ARC 700 PMU does not support sampling events */ - if (is_sampling_event(event)) - return -ENOENT; - switch (event->attr.type) { case PERF_TYPE_HARDWARE: if (event->attr.config >= PERF_COUNT_HW_MAX) @@ -298,6 +294,9 @@ static int arc_pmu_device_probe(struct platform_device *pdev) .read = arc_pmu_read, }; + /* ARC 700 PMU does not support sampling events */ + arc_pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT; + ret = perf_pmu_register(&arc_pmu->pmu, pdev->name, PERF_TYPE_RAW); return ret; diff --git a/arch/arc/plat-arcfpga/Kconfig b/arch/arc/plat-arcfpga/Kconfig index e27bb5cc3c1e..b9f34cf55acf 100644 --- a/arch/arc/plat-arcfpga/Kconfig +++ b/arch/arc/plat-arcfpga/Kconfig @@ -41,11 +41,4 @@ config ISS_SMP_EXTN -XTL (To enable CPU start/stop/set-PC for another CPU) It doesn't provide coherent Caches and/or Atomic Ops (LLOCK/SCOND) -config ARC_SERIAL_BAUD - int "UART Baud rate" - default "115200" - depends on SERIAL_ARC || SERIAL_ARC_CONSOLE - help - Baud rate for the ARC UART - endif diff --git a/arch/arc/plat-arcfpga/platform.c b/arch/arc/plat-arcfpga/platform.c index 8c643c2967df..1038949a99a1 100644 --- a/arch/arc/plat-arcfpga/platform.c +++ b/arch/arc/plat-arcfpga/platform.c @@ -22,115 +22,22 @@ #include <plat/smp.h> #include <plat/irq.h> -/*----------------------- Platform Devices -----------------------------*/ - -#if IS_ENABLED(CONFIG_SERIAL_ARC) -static unsigned long arc_uart_info[] = { - 0, /* uart->is_emulated (runtime @running_on_hw) */ - 0, /* uart->port.uartclk */ - 0, /* uart->baud */ - 0 -}; - -#if defined(CONFIG_SERIAL_ARC_CONSOLE) -/* - * static platform data - but only for early serial - * TBD: derive this from a special DT node - */ -static struct resource arc_uart0_res[] = { - { - .start = UART0_BASE, - .end = UART0_BASE + 0xFF, - .flags = IORESOURCE_MEM, - }, - { - .start = UART0_IRQ, - .end = UART0_IRQ, - .flags = IORESOURCE_IRQ, - }, -}; - -static struct platform_device arc_uart0_dev = { - .name = "arc-uart", - .id = 0, - .num_resources = ARRAY_SIZE(arc_uart0_res), - .resource = arc_uart0_res, - .dev = { - .platform_data = &arc_uart_info, - }, -}; - -static struct platform_device *fpga_early_devs[] __initdata = { - &arc_uart0_dev, -}; -#endif /* CONFIG_SERIAL_ARC_CONSOLE */ - -static void arc_fpga_serial_init(void) -{ - /* To let driver workaround ISS bug: baudh Reg can't be set to 0 */ - arc_uart_info[0] = !running_on_hw; - - arc_uart_info[1] = arc_get_core_freq(); - - arc_uart_info[2] = CONFIG_ARC_SERIAL_BAUD; - -#if defined(CONFIG_SERIAL_ARC_CONSOLE) - early_platform_add_devices(fpga_early_devs, - ARRAY_SIZE(fpga_early_devs)); - - /* - * ARC console driver registers (build time) as an early platform driver - * of class "earlyprintk". However it needs explicit cmdline toggle - * "earlyprintk=ttyARC0" to be successfuly runtime registered. - * Otherwise the early probe below fails to find the driver - */ - early_platform_driver_probe("earlyprintk", 1, 0); - - /* - * This is to make sure that arc uart would be preferred console - * despite one/more of following: - * -command line lacked "console=ttyARC0" or - * -CONFIG_VT_CONSOLE was enabled (for no reason whatsoever) - * Note that this needs to be done after above early console is reg, - * otherwise the early console never gets a chance to run. - */ - add_preferred_console("ttyARC", 0, "115200"); -#endif /* CONFIG_SERIAL_ARC_CONSOLE */ -} -#else /* !IS_ENABLED(CONFIG_SERIAL_ARC) */ -static void arc_fpga_serial_init(void) -{ -} -#endif - static void __init plat_fpga_early_init(void) { pr_info("[plat-arcfpga]: registering early dev resources\n"); - arc_fpga_serial_init(); - #ifdef CONFIG_ISS_SMP_EXTN iss_model_init_early_smp(); #endif } -static struct of_dev_auxdata plat_auxdata_lookup[] __initdata = { -#if IS_ENABLED(CONFIG_SERIAL_ARC) - OF_DEV_AUXDATA("snps,arc-uart", UART0_BASE, "arc-uart", arc_uart_info), -#endif - {} -}; - static void __init plat_fpga_populate_dev(void) { - pr_info("[plat-arcfpga]: registering device resources\n"); - /* * Traverses flattened DeviceTree - registering platform devices - * complete with their resources + * (if any) complete with their resources */ - of_platform_populate(NULL, of_default_bus_match_table, - plat_auxdata_lookup, NULL); + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); } /*----------------------- Machine Descriptions ------------------------------ |