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| author | Michal Simek <michal.simek@xilinx.com> | 2016-02-15 12:10:32 +0100 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2016-04-04 20:28:38 +0200 |
| commit | 9aa65cab73e4873f3e94c6df3d0efd99f3bc9926 (patch) | |
| tree | cd690f73796fa5356b86769cb695524732e538d0 /arch/microblaze/cpu/timer.c | |
| parent | 66de226f9fd2604b42751b6c68e8e33bceb7da9c (diff) | |
| download | u-boot-imx-9aa65cab73e4873f3e94c6df3d0efd99f3bc9926.zip u-boot-imx-9aa65cab73e4873f3e94c6df3d0efd99f3bc9926.tar.gz u-boot-imx-9aa65cab73e4873f3e94c6df3d0efd99f3bc9926.tar.bz2 | |
microblaze: Read information about timer/interrupts from DT
Read information about timer and interrupts from DT. This is the first
small step to move timer and intc to DM.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'arch/microblaze/cpu/timer.c')
| -rw-r--r-- | arch/microblaze/cpu/timer.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/arch/microblaze/cpu/timer.c b/arch/microblaze/cpu/timer.c index 3960bbb..c0fc7c0 100644 --- a/arch/microblaze/cpu/timer.c +++ b/arch/microblaze/cpu/timer.c @@ -7,9 +7,12 @@ */ #include <common.h> +#include <fdtdec.h> #include <asm/microblaze_timer.h> #include <asm/microblaze_intc.h> +DECLARE_GLOBAL_DATA_PTR; + volatile int timestamp = 0; microblaze_timer_t *tmr; @@ -29,8 +32,10 @@ void __udelay(unsigned long usec) while ((get_timer(0) - i) < (usec / 1000)) ; } else { +#ifndef CONFIG_OF_CONTROL for (i = 0; i < (usec * XILINX_CLOCK_FREQ / 10000000); i++) ; +#endif } } @@ -47,12 +52,44 @@ int timer_init (void) u32 preload = 0; u32 ret = 0; +#ifdef CONFIG_OF_CONTROL + const void *blob = gd->fdt_blob; + int node = 0; + u32 cell[2]; + + debug("TIMER: Initialization\n"); + + node = fdt_node_offset_by_compatible(blob, node, + "xlnx,xps-timer-1.00.a"); + if (node != -1) { + fdt_addr_t base = fdtdec_get_addr(blob, node, "reg"); + if (base == FDT_ADDR_T_NONE) + return -1; + + debug("TIMER: Base addr %lx\n", base); + tmr = (microblaze_timer_t *)base; + + ret = fdtdec_get_int_array(blob, node, "interrupts", + cell, ARRAY_SIZE(cell)); + if (ret) + return ret; + + irq = cell[0]; + debug("TIMER: IRQ %x\n", irq); + + preload = fdtdec_get_int(blob, node, "clock-frequency", 0); + preload /= CONFIG_SYS_HZ; + } else { + return node; + } + +#else #if defined(CONFIG_SYS_TIMER_0_ADDR) && defined(CONFIG_SYS_INTC_0_NUM) preload = XILINX_CLOCK_FREQ / CONFIG_SYS_HZ; irq = CONFIG_SYS_TIMER_0_IRQ; tmr = (microblaze_timer_t *) (CONFIG_SYS_TIMER_0_ADDR); #endif - +#endif if (tmr && preload && irq >= 0) { tmr->loadreg = preload; tmr->control = TIMER_INTERRUPT | TIMER_RESET; |