microblaze: Convert axi timer to DM driver
Move axi timer driver from Microblaze to generic location.
Origin implementation was irq based with counting down timer.
CONFIG_TIMER drivers are designed differently that timer is free running up
timer with automatic reload without any interrupt.
Information about clock rates are find out in timer_pre_probe() that's why
there is no need to get any additional information from DT in the driver
itself (only register offset).
Signed-off-by: Michal Simek <michal.simek@amd.com>
Tested-by: Ovidiu Panait <ovidiu.panait@windriver.com>
Link: https://lore.kernel.org/r/6c12fc86bbc1f17d05c25018862e7b7b03346b36.1654684731.git.michal.simek@amd.com
diff --git a/arch/Kconfig b/arch/Kconfig
index d91475d..3d02d8e 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -75,6 +75,11 @@
bool "MicroBlaze architecture"
select SUPPORT_OF_CONTROL
imply CMD_IRQ
+ imply CMD_TIMER
+ imply SPL_REGMAP if SPL
+ imply SPL_TIMER if SPL
+ imply TIMER
+ imply XILINX_TIMER
config MIPS
bool "MIPS architecture"
diff --git a/arch/microblaze/cpu/Makefile b/arch/microblaze/cpu/Makefile
index ea65a09..1c586a7 100644
--- a/arch/microblaze/cpu/Makefile
+++ b/arch/microblaze/cpu/Makefile
@@ -5,7 +5,7 @@
extra-y = start.o
obj-y = irq.o
-obj-y += interrupts.o cache.o exception.o timer.o cpuinfo.o
+obj-y += interrupts.o cache.o exception.o cpuinfo.o
obj-$(CONFIG_STATIC_RELA) += relocate.o
obj-$(CONFIG_XILINX_MICROBLAZE0_PVR) += pvr.o
obj-$(CONFIG_SPL_BUILD) += spl.o
diff --git a/arch/microblaze/cpu/timer.c b/arch/microblaze/cpu/timer.c
deleted file mode 100644
index 647bdcd..0000000
--- a/arch/microblaze/cpu/timer.c
+++ /dev/null
@@ -1,123 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * (C) Copyright 2007 Michal Simek
- *
- * Michal SIMEK <monstr@monstr.eu>
- */
-
-#include <common.h>
-#include <fdtdec.h>
-#include <init.h>
-#include <log.h>
-#include <time.h>
-#include <asm/global_data.h>
-#include <asm/microblaze_timer.h>
-#include <asm/microblaze_intc.h>
-#include <linux/delay.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-volatile int timestamp = 0;
-microblaze_timer_t *tmr;
-
-ulong get_timer (ulong base)
-{
- if (tmr)
- return timestamp - base;
- return timestamp++ - base;
-}
-
-void __udelay(unsigned long usec)
-{
- u32 i;
-
- if (tmr) {
- i = get_timer(0);
- while ((get_timer(0) - i) < (usec / 1000))
- ;
- }
-}
-
-#ifndef CONFIG_SPL_BUILD
-static void timer_isr(void *arg)
-{
- timestamp++;
- tmr->control = tmr->control | TIMER_INTERRUPT;
-}
-
-int timer_init (void)
-{
- int irq = -1;
- u32 preload = 0;
- u32 ret = 0;
- const void *blob = gd->fdt_blob;
- int node = 0;
- u32 cell[2];
-
- debug("TIMER: Initialization\n");
-
- /* Do not init before relocation */
- if (!(gd->flags & GD_FLG_RELOC))
- return 0;
-
- 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;
- }
-
- if (tmr && preload && irq >= 0) {
- tmr->loadreg = preload;
- tmr->control = TIMER_INTERRUPT | TIMER_RESET;
- tmr->control = TIMER_ENABLE | TIMER_ENABLE_INTR |\
- TIMER_RELOAD | TIMER_DOWN_COUNT;
- timestamp = 0;
- ret = install_interrupt_handler (irq, timer_isr, (void *)tmr);
- if (ret)
- tmr = NULL;
- }
- /* No problem if timer is not found/initialized */
- return 0;
-}
-#else
-int timer_init(void)
-{
- return 0;
-}
-#endif
-
-/*
- * This function is derived from PowerPC code (read timebase as long long).
- * On Microblaze it just returns the timer value.
- */
-unsigned long long get_ticks(void)
-{
- return get_timer(0);
-}
-
-/*
- * This function is derived from PowerPC code (timebase clock frequency).
- * On Microblaze it returns the number of timer ticks per second.
- */
-ulong get_tbclk(void)
-{
- return CONFIG_SYS_HZ;
-}
diff --git a/arch/microblaze/include/asm/microblaze_timer.h b/arch/microblaze/include/asm/microblaze_timer.h
deleted file mode 100644
index 2ed1651..0000000
--- a/arch/microblaze/include/asm/microblaze_timer.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ */
-/*
- * (C) Copyright 2007 Michal Simek
- *
- * Michal SIMEK <monstr@monstr.cz>
- */
-
-#define TIMER_ENABLE_ALL 0x400 /* ENALL */
-#define TIMER_PWM 0x200 /* PWMA0 */
-#define TIMER_INTERRUPT 0x100 /* T0INT */
-#define TIMER_ENABLE 0x080 /* ENT0 */
-#define TIMER_ENABLE_INTR 0x040 /* ENIT0 */
-#define TIMER_RESET 0x020 /* LOAD0 */
-#define TIMER_RELOAD 0x010 /* ARHT0 */
-#define TIMER_EXT_CAPTURE 0x008 /* CAPT0 */
-#define TIMER_EXT_COMPARE 0x004 /* GENT0 */
-#define TIMER_DOWN_COUNT 0x002 /* UDT0 */
-#define TIMER_CAPTURE_MODE 0x001 /* MDT0 */
-
-typedef volatile struct microblaze_timer_t {
- int control; /* control/statuc register TCSR */
- int loadreg; /* load register TLR */
- int counter; /* timer/counter register */
-} microblaze_timer_t;
-
-int timer_init(void);