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i2c: mediatek: fix I2C usability for MT7981

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MT7981 actually uses MediaTek I2C controller v3 instead of v1.
This patch adds support for I2C controller v3 fix fixes the I2C usability
for MT7981.

Signed-off-by: Sam Shih <sam.shih@mediatek.com>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
This commit is contained in:
Weijie Gao 2023-07-19 17:16:15 +08:00 committed by Tom Rini
parent 6f1cc261b9
commit 7fa40df482
1 changed files with 43 additions and 2 deletions
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45
drivers/i2c/mtk_i2c.c
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@ -183,9 +183,36 @@ static const uint mt_i2c_regs_v2[] = {
[REG_DCM_EN] = 0xf88,
};
static const uint mt_i2c_regs_v3[] = {
[REG_PORT] = 0x0,
[REG_INTR_MASK] = 0x8,
[REG_INTR_STAT] = 0xc,
[REG_CONTROL] = 0x10,
[REG_TRANSFER_LEN] = 0x14,
[REG_TRANSAC_LEN] = 0x18,
[REG_DELAY_LEN] = 0x1c,
[REG_TIMING] = 0x20,
[REG_START] = 0x24,
[REG_EXT_CONF] = 0x28,
[REG_LTIMING] = 0x2c,
[REG_HS] = 0x30,
[REG_IO_CONFIG] = 0x34,
[REG_FIFO_ADDR_CLR] = 0x38,
[REG_TRANSFER_LEN_AUX] = 0x44,
[REG_CLOCK_DIV] = 0x48,
[REG_SOFTRESET] = 0x50,
[REG_SLAVE_ADDR] = 0x94,
[REG_DEBUGSTAT] = 0xe4,
[REG_DEBUGCTRL] = 0xe8,
[REG_FIFO_STAT] = 0xf4,
[REG_FIFO_THRESH] = 0xf8,
[REG_DCM_EN] = 0xf88,
};
struct mtk_i2c_soc_data {
const uint *regs;
uint dma_sync: 1;
uint ltiming_adjust: 1;
};
struct mtk_i2c_priv {
@ -401,6 +428,10 @@ static int mtk_i2c_set_speed(struct udevice *dev, uint speed)
(sample_cnt << HS_SAMPLE_OFFSET) |
(step_cnt << HS_STEP_OFFSET);
i2c_writel(priv, REG_HS, high_speed_reg);
if (priv->soc_data->ltiming_adjust) {
timing_reg = (sample_cnt << 12) | (step_cnt << 9);
i2c_writel(priv, REG_LTIMING, timing_reg);
}
} else {
ret = mtk_i2c_calculate_speed(clk_src, priv->speed,
&step_cnt, &sample_cnt);
@ -412,7 +443,12 @@ static int mtk_i2c_set_speed(struct udevice *dev, uint speed)
high_speed_reg = I2C_TIME_CLR_VALUE;
i2c_writel(priv, REG_TIMING, timing_reg);
i2c_writel(priv, REG_HS, high_speed_reg);
if (priv->soc_data->ltiming_adjust) {
timing_reg = (sample_cnt << 6) | step_cnt;
i2c_writel(priv, REG_LTIMING, timing_reg);
}
}
exit:
if (mtk_i2c_clk_disable(priv))
return log_msg_ret("set_speed disable clk", -1);
@ -725,7 +761,6 @@ static int mtk_i2c_probe(struct udevice *dev)
return log_msg_ret("probe enable clk", -1);
mtk_i2c_init_hw(priv);
if (mtk_i2c_clk_disable(priv))
return log_msg_ret("probe disable clk", -1);
@ -750,31 +785,37 @@ static int mtk_i2c_deblock(struct udevice *dev)
static const struct mtk_i2c_soc_data mt76xx_soc_data = {
.regs = mt_i2c_regs_v1,
.dma_sync = 0,
.ltiming_adjust = 0,
};
static const struct mtk_i2c_soc_data mt7981_soc_data = {
.regs = mt_i2c_regs_v1,
.regs = mt_i2c_regs_v3,
.dma_sync = 1,
.ltiming_adjust = 1,
};
static const struct mtk_i2c_soc_data mt7986_soc_data = {
.regs = mt_i2c_regs_v1,
.dma_sync = 1,
.ltiming_adjust = 0,
};
static const struct mtk_i2c_soc_data mt8183_soc_data = {
.regs = mt_i2c_regs_v2,
.dma_sync = 1,
.ltiming_adjust = 0,
};
static const struct mtk_i2c_soc_data mt8518_soc_data = {
.regs = mt_i2c_regs_v1,
.dma_sync = 0,
.ltiming_adjust = 0,
};
static const struct mtk_i2c_soc_data mt8512_soc_data = {
.regs = mt_i2c_regs_v1,
.dma_sync = 1,
.ltiming_adjust = 0,
};
static const struct dm_i2c_ops mtk_i2c_ops = {