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timer: starfive: Add Starfive timer support

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Add timer driver in Starfive SoC. It is an timer that outside
of CPU core and inside Starfive SoC.

Signed-off-by: Kuan Lim Lee <kuanlim.lee@starfivetech.com>
Signed-off-by: Wei Liang Lim <weiliang.lim@starfivetech.com>

Changes for v2:
- correct driver name, comment, variable
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
This commit is contained in:
Kuan Lim Lee 2023-12-11 10:22:10 +08:00 • committed by Leo Yu-Chi Liang
parent 7576ab2fac
commit 429fa3b32d
1 changed files with 9 additions and 7 deletions
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16
drivers/timer/starfive-timer.c
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@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0+ // SPDX-License-Identifier: GPL-2.0+
/* /*
* Copyright 2022 StarFive, Inc. All rights reserved. * Copyright 2022 StarFive, Inc. All rights reserved.
* Author: Lee Kuan Lim <kuanlim.lee@starfivetech.com> * Author: Kuan Lim Lee <kuanlim.lee@starfivetech.com>
*/ */
#include <common.h> #include <common.h>
@ -48,8 +48,8 @@ static int starfive_probe(struct udevice *dev)
int ret; int ret;
priv->base = dev_read_addr_ptr(dev); priv->base = dev_read_addr_ptr(dev);
if (IS_ERR(priv->base)) if (!priv->base)
return PTR_ERR(priv->base); return -EINVAL;
timer_channel = dev_read_u32_default(dev, "channel", 0); timer_channel = dev_read_u32_default(dev, "channel", 0);
priv->base = priv->base + (0x40 * timer_channel); priv->base = priv->base + (0x40 * timer_channel);
@ -64,14 +64,16 @@ static int starfive_probe(struct udevice *dev)
return ret; return ret;
uc_priv->clock_rate = clk_get_rate(&clk); uc_priv->clock_rate = clk_get_rate(&clk);
/* Initiate timer, channel 0 */ /*
/* Unmask Interrupt Mask */ * Initiate timer, channel 0
* Unmask Interrupt Mask
*/
writel(0, priv->base + STF_TIMER_INT_MASK); writel(0, priv->base + STF_TIMER_INT_MASK);
/* Single run mode Setting */ /* Single run mode Setting */
if (dev_read_bool(dev, "single-run")) if (dev_read_bool(dev, "single-run"))
writel(1, priv->base + STF_TIMER_CTL); writel(1, priv->base + STF_TIMER_CTL);
/* Set Reload value */ /* Set Reload value */
priv->timer_size = dev_read_u32_default(dev, "timer-size", 0xffffffff); priv->timer_size = dev_read_u32_default(dev, "timer-size", -1U);
writel(priv->timer_size, priv->base + STF_TIMER_LOAD); writel(priv->timer_size, priv->base + STF_TIMER_LOAD);
/* Enable to start timer */ /* Enable to start timer */
writel(1, priv->base + STF_TIMER_ENABLE); writel(1, priv->base + STF_TIMER_ENABLE);
@ -85,7 +87,7 @@ static const struct udevice_id starfive_ids[] = {
}; };
U_BOOT_DRIVER(jh8100_starfive_timer) = { U_BOOT_DRIVER(jh8100_starfive_timer) = {
.name = "jh8100_starfive_timer", .name = "starfive_timer",
.id = UCLASS_TIMER, .id = UCLASS_TIMER,
.of_match = starfive_ids, .of_match = starfive_ids,
.probe = starfive_probe, .probe = starfive_probe,