diff options
| author | Qii Wang <qii.wang@mediatek.com> | 2019-04-02 20:35:58 +0800 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2019-04-15 13:40:42 +0200 |
| commit | a15c91bac6957065090360c4b733859a52274fb6 (patch) | |
| tree | 9786733924ee5ea9cf7cf41cd29d47e155c0855c /drivers/i2c | |
| parent | cad6dc5d2887e3d646848849e5e56863480491f4 (diff) | |
i2c: mediatek: Add i2c and apdma sync in i2c driver
When i2c and apdma use different source clocks, we should enable
synchronization between them.
Signed-off-by: Qii Wang <qii.wang@mediatek.com>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-mt65xx.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c index 1a7235ec6c18..6137ad770542 100644 --- a/drivers/i2c/busses/i2c-mt65xx.c +++ b/drivers/i2c/busses/i2c-mt65xx.c @@ -77,6 +77,8 @@ #define I2C_CONTROL_DIR_CHANGE (0x1 << 4) #define I2C_CONTROL_ACKERR_DET_EN (0x1 << 5) #define I2C_CONTROL_TRANSFER_LEN_CHANGE (0x1 << 6) +#define I2C_CONTROL_DMAACK_EN (0x1 << 8) +#define I2C_CONTROL_ASYNC_MODE (0x1 << 9) #define I2C_CONTROL_WRAPPER (0x1 << 0) #define I2C_DRV_NAME "i2c-mt65xx" @@ -169,6 +171,7 @@ struct mtk_i2c_compatible { unsigned char aux_len_reg: 1; unsigned char support_33bits: 1; unsigned char timing_adjust: 1; + unsigned char dma_sync: 1; }; struct mtk_i2c { @@ -218,6 +221,7 @@ static const struct mtk_i2c_compatible mt2712_compat = { .aux_len_reg = 1, .support_33bits = 1, .timing_adjust = 1, + .dma_sync = 0, }; static const struct mtk_i2c_compatible mt6577_compat = { @@ -229,6 +233,7 @@ static const struct mtk_i2c_compatible mt6577_compat = { .aux_len_reg = 0, .support_33bits = 0, .timing_adjust = 0, + .dma_sync = 0, }; static const struct mtk_i2c_compatible mt6589_compat = { @@ -240,6 +245,7 @@ static const struct mtk_i2c_compatible mt6589_compat = { .aux_len_reg = 0, .support_33bits = 0, .timing_adjust = 0, + .dma_sync = 0, }; static const struct mtk_i2c_compatible mt7622_compat = { @@ -251,6 +257,7 @@ static const struct mtk_i2c_compatible mt7622_compat = { .aux_len_reg = 1, .support_33bits = 0, .timing_adjust = 0, + .dma_sync = 0, }; static const struct mtk_i2c_compatible mt8173_compat = { @@ -261,6 +268,7 @@ static const struct mtk_i2c_compatible mt8173_compat = { .aux_len_reg = 1, .support_33bits = 1, .timing_adjust = 0, + .dma_sync = 0, }; static const struct of_device_id mtk_i2c_of_match[] = { @@ -360,6 +368,9 @@ static void mtk_i2c_init_hw(struct mtk_i2c *i2c) control_reg = I2C_CONTROL_ACKERR_DET_EN | I2C_CONTROL_CLK_EXT_EN | I2C_CONTROL_DMA_EN; + if (i2c->dev_comp->dma_sync) + control_reg |= I2C_CONTROL_DMAACK_EN | I2C_CONTROL_ASYNC_MODE; + mtk_i2c_writew(i2c, control_reg, OFFSET_CONTROL); mtk_i2c_writew(i2c, I2C_DELAY_LEN, OFFSET_DELAY_LEN); |