e18fcbba5a
Now that device_api attribute is unmodified at runtime, as well as all the other attributes, it is possible to switch all device driver instance to be constant. A coccinelle rule is used for this: @r_const_dev_1 disable optional_qualifier @ @@ -struct device * +const struct device * @r_const_dev_2 disable optional_qualifier @ @@ -struct device * const +const struct device * Fixes #27399 Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
84 lines
1.9 KiB
C
84 lines
1.9 KiB
C
/*
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* Copyright (c) 2018 - 2019 Antmicro <www.antmicro.com>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define DT_DRV_COMPAT litex_timer0
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#include <kernel.h>
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#include <arch/cpu.h>
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#include <device.h>
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#include <irq.h>
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#include <spinlock.h>
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#include <drivers/timer/system_timer.h>
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#define TIMER_BASE DT_INST_REG_ADDR(0)
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#define TIMER_LOAD_ADDR ((TIMER_BASE) + 0x00)
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#define TIMER_RELOAD_ADDR ((TIMER_BASE) + 0x10)
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#define TIMER_EN_ADDR ((TIMER_BASE) + 0x20)
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#define TIMER_EV_PENDING_ADDR ((TIMER_BASE) + 0x3c)
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#define TIMER_EV_ENABLE_ADDR ((TIMER_BASE) + 0x40)
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#define TIMER_TOTAL_UPDATE ((TIMER_BASE) + 0x44)
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#define TIMER_TOTAL ((TIMER_BASE) + 0x48)
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#define TIMER_EV 0x1
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#define TIMER_IRQ DT_INST_IRQN(0)
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#define TIMER_DISABLE 0x0
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#define TIMER_ENABLE 0x1
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#define UPDATE_TOTAL 0x1
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static void litex_timer_irq_handler(void *device)
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{
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ARG_UNUSED(device);
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int key = irq_lock();
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sys_write8(TIMER_EV, TIMER_EV_PENDING_ADDR);
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z_clock_announce(1);
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irq_unlock(key);
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}
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uint32_t z_timer_cycle_get_32(void)
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{
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static struct k_spinlock lock;
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uint32_t timer_total;
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k_spinlock_key_t key = k_spin_lock(&lock);
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litex_write8(UPDATE_TOTAL, TIMER_TOTAL_UPDATE);
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timer_total = (uint32_t)litex_read64(TIMER_TOTAL);
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k_spin_unlock(&lock, key);
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return timer_total;
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}
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/* tickless kernel is not supported */
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uint32_t z_clock_elapsed(void)
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{
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return 0;
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}
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int z_clock_driver_init(const struct device *device)
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{
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ARG_UNUSED(device);
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IRQ_CONNECT(TIMER_IRQ, DT_INST_IRQ(0, priority),
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litex_timer_irq_handler, NULL, 0);
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irq_enable(TIMER_IRQ);
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sys_write8(TIMER_DISABLE, TIMER_EN_ADDR);
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for (int i = 0; i < 4; i++) {
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sys_write8(k_ticks_to_cyc_floor32(1) >> (24 - i * 8),
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TIMER_RELOAD_ADDR + i * 0x4);
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sys_write8(k_ticks_to_cyc_floor32(1) >> (24 - i * 8),
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TIMER_LOAD_ADDR + i * 0x4);
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}
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sys_write8(TIMER_ENABLE, TIMER_EN_ADDR);
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sys_write8(sys_read8(TIMER_EV_PENDING_ADDR), TIMER_EV_PENDING_ADDR);
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sys_write8(TIMER_EV, TIMER_EV_ENABLE_ADDR);
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return 0;
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}
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