reset: add support for Amlogic A1 family
This patch adds reset support for the Amlogic A1 family. We add the structure meson_reset_drvdata, which in the future will allow this driver to be used for other families by declaring only the correct parameters reg_count and level_offset. Signed-off-by: Alexey Romanov <avromanov@salutedevices.com> Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org> Link: https://lore.kernel.org/r/20231005085434.74755-3-avromanov@salutedevices.com Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
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committed by
Neil Armstrong

parent
1cff5bf0c3
commit
cffe312bd7
@@ -13,18 +13,26 @@
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#include <reset-uclass.h>
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#include <reset-uclass.h>
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#include <regmap.h>
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#include <regmap.h>
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#include <linux/bitops.h>
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#include <linux/bitops.h>
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#include <linux/delay.h>
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#define REG_COUNT 8
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#define BITS_PER_REG 32
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#define BITS_PER_REG 32
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#define LEVEL_OFFSET 0x7c
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struct meson_reset_drvdata {
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unsigned int reg_count;
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unsigned int level_offset;
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};
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struct meson_reset_priv {
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struct meson_reset_priv {
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struct regmap *regmap;
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struct regmap *regmap;
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struct meson_reset_drvdata *drvdata;
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};
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};
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static int meson_reset_request(struct reset_ctl *reset_ctl)
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static int meson_reset_request(struct reset_ctl *reset_ctl)
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{
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{
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if (reset_ctl->id > (REG_COUNT * BITS_PER_REG))
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struct meson_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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struct meson_reset_drvdata *data = priv->drvdata;
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if (reset_ctl->id > (data->reg_count * BITS_PER_REG))
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return -EINVAL;
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return -EINVAL;
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return 0;
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return 0;
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@@ -33,9 +41,10 @@ static int meson_reset_request(struct reset_ctl *reset_ctl)
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static int meson_reset_level(struct reset_ctl *reset_ctl, bool assert)
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static int meson_reset_level(struct reset_ctl *reset_ctl, bool assert)
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{
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{
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struct meson_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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struct meson_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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struct meson_reset_drvdata *data = priv->drvdata;
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uint bank = reset_ctl->id / BITS_PER_REG;
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uint bank = reset_ctl->id / BITS_PER_REG;
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uint offset = reset_ctl->id % BITS_PER_REG;
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uint offset = reset_ctl->id % BITS_PER_REG;
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uint reg_offset = LEVEL_OFFSET + (bank << 2);
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uint reg_offset = data->level_offset + (bank << 2);
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uint val;
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uint val;
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regmap_read(priv->regmap, reg_offset, &val);
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regmap_read(priv->regmap, reg_offset, &val);
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@@ -64,15 +73,36 @@ struct reset_ops meson_reset_ops = {
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.rst_deassert = meson_reset_deassert,
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.rst_deassert = meson_reset_deassert,
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};
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};
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static const struct meson_reset_drvdata meson_gxbb_data = {
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.reg_count = 8,
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.level_offset = 0x7c,
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};
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static const struct meson_reset_drvdata meson_a1_data = {
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.reg_count = 3,
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.level_offset = 0x40,
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};
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static const struct udevice_id meson_reset_ids[] = {
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static const struct udevice_id meson_reset_ids[] = {
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{ .compatible = "amlogic,meson-gxbb-reset" },
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{
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{ .compatible = "amlogic,meson-axg-reset" },
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.compatible = "amlogic,meson-gxbb-reset",
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.data = (ulong)&meson_gxbb_data,
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},
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{
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.compatible = "amlogic,meson-axg-reset",
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.data = (ulong)&meson_gxbb_data,
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},
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{
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.compatible = "amlogic,meson-a1-reset",
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.data = (ulong)&meson_a1_data,
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},
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{ }
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{ }
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};
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};
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static int meson_reset_probe(struct udevice *dev)
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static int meson_reset_probe(struct udevice *dev)
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{
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{
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struct meson_reset_priv *priv = dev_get_priv(dev);
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struct meson_reset_priv *priv = dev_get_priv(dev);
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priv->drvdata = (struct meson_reset_drvdata *)dev_get_driver_data(dev);
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return regmap_init_mem(dev_ofnode(dev), &priv->regmap);
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return regmap_init_mem(dev_ofnode(dev), &priv->regmap);
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}
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}
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