[PATCH 04/22] timer: add orion-timer support

[Pali Rohár]

On Wednesday 17 August 2022 21:37:51 Michael Walle wrote:
> Add timer support for Kirkwood and MVEBU devices.
> 
> Cc: Pali Rohár <pali at kernel.org>
> Signed-off-by: Michael Walle <michael at walle.cc>

Acked-by: Pali Rohár <pali at kernel.org>

> ---
>  drivers/timer/Kconfig       |  6 ++++
>  drivers/timer/Makefile      |  1 +
>  drivers/timer/orion-timer.c | 63 +++++++++++++++++++++++++++++++++++++
>  3 files changed, 70 insertions(+)
>  create mode 100644 drivers/timer/orion-timer.c
> 
> diff --git a/drivers/timer/Kconfig b/drivers/timer/Kconfig
> index 20b5af7e26..4049290148 100644
> --- a/drivers/timer/Kconfig
> +++ b/drivers/timer/Kconfig
> @@ -194,6 +194,12 @@ config OMAP_TIMER
>  	help
>  	  Select this to enable an timer for Omap devices.
>  
> +config ORION_TIMER
> +	bool "Orion timer support"
> +	depends on TIMER
> +	help
> +	  Select this to enable an timer for Orion devices.
> +
>  config RISCV_TIMER
>  	bool "RISC-V timer support"
>  	depends on TIMER && RISCV
> diff --git a/drivers/timer/Makefile b/drivers/timer/Makefile
> index d9822a5370..560e2d27e1 100644
> --- a/drivers/timer/Makefile
> +++ b/drivers/timer/Makefile
> @@ -17,6 +17,7 @@ obj-$(CONFIG_MPC83XX_TIMER) += mpc83xx_timer.o
>  obj-$(CONFIG_NOMADIK_MTU_TIMER)	+= nomadik-mtu-timer.o
>  obj-$(CONFIG_NPCM_TIMER)        += npcm-timer.o
>  obj-$(CONFIG_OMAP_TIMER)	+= omap-timer.o
> +obj-$(CONFIG_ORION_TIMER)	+= orion-timer.o
>  obj-$(CONFIG_RENESAS_OSTM_TIMER) += ostm_timer.o
>  obj-$(CONFIG_RISCV_TIMER) += riscv_timer.o
>  obj-$(CONFIG_ROCKCHIP_TIMER) += rockchip_timer.o
> diff --git a/drivers/timer/orion-timer.c b/drivers/timer/orion-timer.c
> new file mode 100644
> index 0000000000..fd30e1bf03
> --- /dev/null
> +++ b/drivers/timer/orion-timer.c
> @@ -0,0 +1,63 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +#include <asm/io.h>
> +#include <common.h>
> +#include <dm/device.h>
> +#include <dm/fdtaddr.h>
> +#include <timer.h>
> +
> +#define TIMER_CTRL		0x00
> +#define TIMER0_EN		BIT(0)
> +#define TIMER0_RELOAD_EN	BIT(1)
> +#define TIMER0_RELOAD		0x10
> +#define TIMER0_VAL		0x14
> +
> +struct orion_timer_priv {
> +	void *base;
> +};
> +
> +static uint64_t orion_timer_get_count(struct udevice *dev)
> +{
> +	struct orion_timer_priv *priv = dev_get_priv(dev);
> +
> +	return ~readl(priv->base + TIMER0_VAL);
> +}
> +
> +static int orion_timer_probe(struct udevice *dev)
> +{
> +	struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
> +	struct orion_timer_priv *priv = dev_get_priv(dev);
> +
> +	priv->base = devfdt_remap_addr_index(dev, 0);
> +	if (!priv->base) {
> +		debug("unable to map registers\n");
> +		return -ENOMEM;
> +	}
> +
> +	uc_priv->clock_rate = CONFIG_SYS_TCLK;
> +
> +	writel(~0, priv->base + TIMER0_VAL);
> +	writel(~0, priv->base + TIMER0_RELOAD);
> +
> +	/* enable timer */
> +	setbits_le32(priv->base + TIMER_CTRL, TIMER0_EN | TIMER0_RELOAD_EN);
> +
> +	return 0;
> +}
> +
> +static const struct timer_ops orion_timer_ops = {
> +	.get_count = orion_timer_get_count,
> +};
> +
> +static const struct udevice_id orion_timer_ids[] = {
> +	{ .compatible = "marvell,orion-timer" },
> +	{}
> +};
> +
> +U_BOOT_DRIVER(orion_timer) = {
> +	.name	= "orion_timer",
> +	.id	= UCLASS_TIMER,
> +	.of_match = orion_timer_ids,
> +	.probe = orion_timer_probe,
> +	.ops	= &orion_timer_ops,
> +	.priv_auto	= sizeof(struct orion_timer_priv),
> +};
> -- 
> 2.30.2
>