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spi: mtk_snor: support newer SOCs

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Add support for some newer SOCs. New compatible strings are added to the
lookup table. Some SOCs also need a extra bit clocked out as a hardware
quirk, so a new capability structure and code is added to support that.

Signed-off-by: Noah.Shen <noah.shen@mediatek.com>
Reviewed-by: Julien Stephan <jstephan@baylibre.com>
Link: https://patch.msgid.link/20260406-mtk-spi-nor-improvements-v1-6-66f675cbbd3e@baylibre.com
Signed-off-by: David Lechner <dlechner@baylibre.com>
This commit is contained in:
Noah.Shen 2026-04-06 15:13:32 -05:00 committed by David Lechner
parent 78950bb207
commit 1cfcd7100d
1 changed files with 29 additions and 2 deletions
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31
drivers/spi/mtk_snor.c
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@ -104,9 +104,19 @@
#define MTK_NOR_UNLOCK_ALL 0x0
struct mtk_snor_caps {
/*
* Some new SoCs modify the timing of fetching registers' values and IDs
* of NOR flash, they need a extra_bit which can add more clock cycles
* for fetching data.
*/
u8 extra_bit;
};
struct mtk_snor_priv {
struct device *dev;
void __iomem *base;
const struct mtk_snor_caps *caps;
u8 *buffer;
struct clk spi_clk;
struct clk ctlr_clk;
@ -448,7 +458,11 @@ static int mtk_snor_cmd_program(struct mtk_snor_priv *priv,
}
/* trigger op */
writel(prg_len * BITS_PER_BYTE, priv->base + MTK_NOR_REG_PRG_CNT);
if (rx_len)
writel(prg_len * BITS_PER_BYTE + priv->caps->extra_bit,
priv->base + MTK_NOR_REG_PRG_CNT);
else
writel(prg_len * BITS_PER_BYTE, priv->base + MTK_NOR_REG_PRG_CNT);
ret = mtk_snor_cmd_exec(priv, MTK_NOR_CMD_PROGRAM, prg_len * BITS_PER_BYTE);
if (ret)
@ -508,6 +522,8 @@ static int mtk_snor_probe(struct udevice *bus)
if (!priv->base)
return -EINVAL;
priv->caps = (const void *)dev_get_driver_data(bus);
ret = clk_get_by_name(bus, "spi", &priv->spi_clk);
if (ret < 0)
return ret;
@ -584,8 +600,19 @@ static const struct dm_spi_ops mtk_snor_ops = {
.set_mode = mtk_snor_set_mode,
};
static const struct mtk_snor_caps mtk_snor_caps_default = {
.extra_bit = 0,
};
static const struct mtk_snor_caps mtk_snor_caps_extra_bit = {
.extra_bit = 1,
};
static const struct udevice_id mtk_snor_ids[] = {
{ .compatible = "mediatek,mtk-snor" },
{ .compatible = "mediatek,mtk-snor", .data = (ulong)&mtk_snor_caps_default },
{ .compatible = "mediatek,mt8188-nor", .data = (ulong)&mtk_snor_caps_extra_bit },
{ .compatible = "mediatek,mt8189-nor", .data = (ulong)&mtk_snor_caps_extra_bit },
{ .compatible = "mediatek,mt8195-nor", .data = (ulong)&mtk_snor_caps_default },
{}
};