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// SPDX-License-Identifier: GPL-2.0 OR MIT
/* Copyright 2017-2019 Qiang Yu <yuq825@gmail.com> */
#include <linux/iopoll.h>
#include <linux/device.h>
#include "lima_device.h"
#include "lima_pmu.h"
#include "lima_regs.h"
#define pmu_write(reg, data) writel(data, ip->iomem + reg)
#define pmu_read(reg) readl(ip->iomem + reg)
static int lima_pmu_wait_cmd(struct lima_ip *ip)
{
struct lima_device *dev = ip->dev;
int err;
u32 v;
err = readl_poll_timeout(ip->iomem + LIMA_PMU_INT_RAWSTAT,
v, v & LIMA_PMU_INT_CMD_MASK,
100, 100000);
if (err) {
dev_err(dev->dev, "timeout wait pmd cmd\n");
return err;
}
pmu_write(LIMA_PMU_INT_CLEAR, LIMA_PMU_INT_CMD_MASK);
return 0;
}
int lima_pmu_init(struct lima_ip *ip)
{
int err;
u32 stat;
pmu_write(LIMA_PMU_INT_MASK, 0);
/* If this value is too low, when in high GPU clk freq,
* GPU will be in unstable state.
*/
pmu_write(LIMA_PMU_SW_DELAY, 0xffff);
/* status reg 1=off 0=on */
stat = pmu_read(LIMA_PMU_STATUS);
/* power up all ip */
if (stat) {
pmu_write(LIMA_PMU_POWER_UP, stat);
err = lima_pmu_wait_cmd(ip);
if (err)
return err;
}
return 0;
}
void lima_pmu_fini(struct lima_ip *ip)
{
}
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