[PATCH 1/6] clk: meson: add minimal driver for g12a-ao clocks

[Neil Armstrong]

Hi,

On 14/12/2020 12:24, Marek Szyprowski wrote:
> Add minimal driver AO clocks on meson G12A family. Only ADC related clocks
> are supported.
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
> Change-Id: I0c91848bc55493e19570db333e7da6020d687907

Please drop the Change-Ids

> ---
>  drivers/clk/meson/Makefile  |  1 +
>  drivers/clk/meson/g12a-ao.c | 83 +++++++++++++++++++++++++++++++++++++
>  2 files changed, 84 insertions(+)
>  create mode 100644 drivers/clk/meson/g12a-ao.c
> 
> diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile
> index c873d6976fa..7204383e173 100644
> --- a/drivers/clk/meson/Makefile
> +++ b/drivers/clk/meson/Makefile
> @@ -6,4 +6,5 @@
>  obj-$(CONFIG_CLK_MESON_GX) += gxbb.o
>  obj-$(CONFIG_CLK_MESON_AXG) += axg.o
>  obj-$(CONFIG_CLK_MESON_G12A) += g12a.o
> +obj-$(CONFIG_CLK_MESON_G12A) += g12a-ao.o
>  
> diff --git a/drivers/clk/meson/g12a-ao.c b/drivers/clk/meson/g12a-ao.c
> new file mode 100644
> index 00000000000..7a0abea77c4
> --- /dev/null
> +++ b/drivers/clk/meson/g12a-ao.c
> @@ -0,0 +1,83 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +
> +#include <common.h>
> +#include <log.h>
> +#include <asm/io.h>
> +#include <clk-uclass.h>
> +#include <dm.h>
> +#include <regmap.h>
> +#include <syscon.h>
> +#include <dt-bindings/clock/g12a-aoclkc.h>
> +
> +#include "clk_meson.h"
> +
> +struct meson_clk {
> +	struct regmap *map;
> +};
> +
> +#define AO_CLK_GATE0		0x4c
> +#define AO_SAR_CLK		0x90
> +
> +static struct meson_gate gates[] = {
> +	MESON_GATE(CLKID_AO_SAR_ADC, AO_CLK_GATE0, 8),
> +	MESON_GATE(CLKID_AO_SAR_ADC_CLK, AO_SAR_CLK, 8),
> +};
> +
> +static int meson_set_gate(struct clk *clk, bool on)
> +{
> +	struct meson_clk *priv = dev_get_priv(clk->dev);
> +	struct meson_gate *gate;
> +
> +	if (clk->id >= ARRAY_SIZE(gates))
> +		return -ENOENT;
> +
> +	gate = &gates[clk->id];
> +
> +	if (gate->reg == 0)
> +		return 0;
> +
> +	regmap_update_bits(priv->map, gate->reg,
> +			   BIT(gate->bit), on ? BIT(gate->bit) : 0);
> +
> +	return 0;
> +}
> +
> +static int meson_clk_enable(struct clk *clk)
> +{
> +	return meson_set_gate(clk, true);
> +}
> +
> +static int meson_clk_disable(struct clk *clk)
> +{
> +	return meson_set_gate(clk, false);
> +}
> +
> +static int meson_clk_probe(struct udevice *dev)
> +{
> +	struct meson_clk *priv = dev_get_priv(dev);
> +
> +	priv->map = syscon_node_to_regmap(dev_get_parent(dev)->node);
> +	if (IS_ERR(priv->map))
> +		return PTR_ERR(priv->map);
> +
> +	return 0;
> +}
> +
> +static struct clk_ops meson_clk_ops = {
> +	.disable	= meson_clk_disable,
> +	.enable		= meson_clk_enable,
> +};
> +
> +static const struct udevice_id meson_clk_ids[] = {
> +	{ .compatible = "amlogic,meson-g12a-aoclkc" },
> +	{ }
> +};
> +
> +U_BOOT_DRIVER(meson_clk_axg) = {
> +	.name		= "meson_clk_g12a_ao",
> +	.id		= UCLASS_CLK,
> +	.of_match	= meson_clk_ids,
> +	.priv_auto_alloc_size = sizeof(struct meson_clk),
> +	.ops		= &meson_clk_ops,
> +	.probe		= meson_clk_probe,
> +};
> 

very nice, thanks for addition !

Reviewed-by: Neil Armstrong <narmstrong at baylibre.com>