diff options
author | Vineet Gupta <vgupta@synopsys.com> | 2013-01-18 15:12:21 +0530 |
---|---|---|
committer | Vineet Gupta <vgupta@synopsys.com> | 2013-02-15 23:15:57 +0530 |
commit | abe11ddea1d759f9995a9a4636c28c9b40856ca8 (patch) | |
tree | 53085d131ecbe7a810f9feadcba571f49a2e9465 /arch/arc/plat-arcfpga | |
parent | 450dd430bf45ab212a91acfb9bed2528d17f30cd (diff) | |
download | linux-abe11ddea1d759f9995a9a4636c28c9b40856ca8.tar.bz2 |
ARC: [plat-arcfpga]: Enabling DeviceTree for Angel4 board
* arc-uart platform device now populated dynamically, using
of_platform_populate() - applies to any other device whatsoever.
* uart in turn requires incore arc-intc to be also present in DT
* A irq-domain needs to be instantiated for IRQ requests by DT probed
device (e.g. arc-uart)
TODO: switch over to linear irq domain once all devs have been
transitioned to DT
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arc/plat-arcfpga')
-rw-r--r-- | arch/arc/plat-arcfpga/platform.c | 97 |
1 files changed, 46 insertions, 51 deletions
diff --git a/arch/arc/plat-arcfpga/platform.c b/arch/arc/plat-arcfpga/platform.c index 5388b31e2ead..33bcac8bd6b8 100644 --- a/arch/arc/plat-arcfpga/platform.c +++ b/arch/arc/plat-arcfpga/platform.c @@ -13,6 +13,7 @@ #include <linux/device.h> #include <linux/platform_device.h> #include <linux/console.h> +#include <linux/of_platform.h> #include <asm/setup.h> #include <asm/irq.h> #include <asm/clk.h> @@ -20,58 +21,56 @@ /*----------------------- Platform Devices -----------------------------*/ -#if defined(CONFIG_SERIAL_ARC) || defined(CONFIG_SERIAL_ARC_MODULE) - static unsigned long arc_uart_info[] = { - CONFIG_ARC_SERIAL_BAUD, /* uart->baud */ - -1, /* uart->port.uartclk */ - -1, /* uart->is_emulated (runtime @running_on_hw) */ + 0, /* uart->is_emulated (runtime @running_on_hw) */ + 0, /* uart->port.uartclk */ + 0, /* uart->baud */ 0 }; -#define ARC_UART_DEV(n) \ - \ -static struct resource arc_uart##n##_res[] = { \ - { \ - .start = UART##n##_BASE, \ - .end = UART##n##_BASE + 0xFF, \ - .flags = IORESOURCE_MEM, \ - }, \ - { \ - .start = UART##n##_IRQ, \ - .end = UART##n##_IRQ, \ - .flags = IORESOURCE_IRQ, \ - }, \ -}; \ - \ -static struct platform_device arc_uart##n##_dev = { \ - .name = "arc-uart", \ - .id = n, \ - .num_resources = ARRAY_SIZE(arc_uart##n##_res), \ - .resource = arc_uart##n##_res, \ - .dev = { \ - .platform_data = &arc_uart_info, \ - }, \ -} +#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, + }, +}; -ARC_UART_DEV(0); -#if CONFIG_SERIAL_ARC_NR_PORTS > 1 -ARC_UART_DEV(1); -#endif +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 = { -#if defined(CONFIG_SERIAL_ARC_CONSOLE) &arc_uart0_dev, -#endif }; +#endif 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(); - /* To let driver workaround ISS bug: baudh Reg can't be set to 0 */ - arc_uart_info[2] = !running_on_hw; + 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)); @@ -97,16 +96,9 @@ static void arc_fpga_serial_init(void) * otherwise the early console never gets a chance to run. */ add_preferred_console("ttyARC", 0, "115200"); +#endif } -#else - -static void arc_fpga_serial_init(void) -{ -} - -#endif /* CONFIG_SERIAL_ARC */ - /* * Early Platform Initialization called from setup_arch() */ @@ -117,20 +109,23 @@ void __init arc_platform_early_init(void) arc_fpga_serial_init(); } -static struct platform_device *fpga_devs[] __initdata = { +static struct of_dev_auxdata plat_auxdata_lookup[] __initdata = { #if defined(CONFIG_SERIAL_ARC) || defined(CONFIG_SERIAL_ARC_MODULE) - &arc_uart0_dev, -#if CONFIG_SERIAL_ARC_NR_PORTS > 1 - &arc_uart1_dev, -#endif + OF_DEV_AUXDATA("snps,arc-uart", UART0_BASE, "arc-uart", arc_uart_info), #endif + {} }; int __init fpga_plat_init(void) { pr_info("[plat-arcfpga]: registering device resources\n"); - platform_add_devices(fpga_devs, ARRAY_SIZE(fpga_devs)); + /* + * Traverses flattened DeviceTree - registering platform devices + * complete with their resources + */ + of_platform_populate(NULL, of_default_bus_match_table, + plat_auxdata_lookup, NULL); return 0; } |