[U-Boot] [U-Boot,6/7] rockchip: rk322x: add sysreset driver

[Philipp Tomsich]

On Fri, 9 Jun 2017, Kever Yang wrote:

> Rockchip rk322x sysreset is much like rk3036 and other Rockchip SoCs,
> only difference is that the target register address is different.
>
> Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
> ---
>
> drivers/sysreset/sysreset_rk322x.c | 45 ++++++++++++++++++++++++++++++++++++++
> 1 file changed, 45 insertions(+)
> create mode 100644 drivers/sysreset/sysreset_rk322x.c
>
> diff --git a/drivers/sysreset/sysreset_rk322x.c b/drivers/sysreset/sysreset_rk322x.c
> new file mode 100644
> index 0000000..5fce79b
> --- /dev/null
> +++ b/drivers/sysreset/sysreset_rk322x.c
> @@ -0,0 +1,45 @@
> +/*
> + * (C) Copyright 2017 Rockchip Electronics Co., Ltd
> + *
> + * SPDX-License-Identifier:     GPL-2.0+
> + */
> +
> +#include <common.h>
> +#include <dm.h>
> +#include <errno.h>
> +#include <sysreset.h>
> +#include <asm/io.h>
> +#include <asm/arch/clock.h>
> +#include <asm/arch/cru_rk322x.h>
> +#include <asm/arch/hardware.h>
> +#include <linux/err.h>
> +
> +int rk322x_sysreset_request(struct udevice *dev, enum sysreset_t type)
> +{
> +	struct rk322x_cru *cru = rockchip_get_cru();
> +
> +	if (IS_ERR(cru))
> +		return PTR_ERR(cru);
> +	switch (type) {
> +	case SYSRESET_WARM:
> +		writel(0xeca8, &cru->cru_glb_srst_snd_value);

Please make this a symbolic constant, thanks.

> +		break;
> +	case SYSRESET_COLD:
> +		writel(0xfdb9, &cru->cru_glb_srst_fst_value);

Same.

Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>

> +		break;
> +	default:
> +		return -EPROTONOSUPPORT;
> +	}
> +
> +	return -EINPROGRESS;
> +}
> +
> +static struct sysreset_ops rk322x_sysreset = {
> +	.request	= rk322x_sysreset_request,
> +};
> +
> +U_BOOT_DRIVER(sysreset_rk322x) = {
> +	.name	= "rk322x_sysreset",
> +	.id	= UCLASS_SYSRESET,
> +	.ops	= &rk322x_sysreset,
> +};
>