ARC: [arcfpga] RIP early uart platform device stuff (1b9bff75) · Commits · e / devices / android_kernel_xiaomi_markw

arch/arc/plat-arcfpga/Kconfig

+0 −7

Original line number	Diff line number	Diff line
		@@ -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

arch/arc/plat-arcfpga/platform.c

+2 −95

Original line number	Diff line number	Diff line
		@@ -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 ------------------------------