diff options
| author | Yu-Ping Wu <yupingso@google.com> | 2019-08-16 13:38:32 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-08-21 09:27:39 +0000 |
| commit | 4b3047833f9bce984e2710b98be5100f684cc337 (patch) | |
| tree | fc8f38d2196f0233f2274a5147a2072a588a3dfd /src/soc/mediatek/mt8183/spi.c | |
| parent | 7fc006f7452ff944184e2091d670a647b96f9aac (diff) | |
mediatek: Use GPIO based SPI CS
Some boards (e.g., Kukui) need GPIO based CS for SPI0. This patch
changes the pinmux and binds the pins to the correponding SPIs.
When using GPIO based SPI CS, we need to manually make CS log/high
before/after SPI transactions.
BUG=b:132311067
BRANCH=none
TEST=Verified that b/132311067 is irreproducible
Change-Id: I61653fb19242b6ee6be9a45545a8b66e5c9c7cad
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33165
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Diffstat (limited to 'src/soc/mediatek/mt8183/spi.c')
| -rw-r--r-- | src/soc/mediatek/mt8183/spi.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/src/soc/mediatek/mt8183/spi.c b/src/soc/mediatek/mt8183/spi.c index 982f6439ed..7672db7993 100644 --- a/src/soc/mediatek/mt8183/spi.c +++ b/src/soc/mediatek/mt8183/spi.c @@ -24,21 +24,27 @@ struct mtk_spi_bus spi_bus[SPI_BUS_NUMBER] = { { .regs = (void *)SPI0_BASE, + .cs_gpio = GPIO(SPI_CSB), }, { .regs = (void *)SPI1_BASE, + .cs_gpio = GPIO(SPI1_CSB), }, { .regs = (void *)SPI2_BASE, + .cs_gpio = GPIO(EINT0), }, { .regs = (void *)SPI3_BASE, + .cs_gpio = GPIO(DPI_D9), }, { .regs = (void *)SPI4_BASE, + .cs_gpio = GPIO(DPI_D5), }, { .regs = (void *)SPI5_BASE, + .cs_gpio = GPIO(DPI_D1), } }; @@ -48,41 +54,42 @@ struct pad_func { }; #define PAD_FUNC(name, func) {PAD_##name##_ID, PAD_##name##_FUNC_##func} +#define PAD_FUNC_GPIO(name) {PAD_##name##_ID, 0} static const struct pad_func pad0_funcs[SPI_BUS_NUMBER][4] = { { PAD_FUNC(SPI_MI, SPI0_MI), - PAD_FUNC(SPI_CSB, SPI0_CSB), + PAD_FUNC_GPIO(SPI_CSB), PAD_FUNC(SPI_MO, SPI0_MO), PAD_FUNC(SPI_CLK, SPI0_CLK), }, { PAD_FUNC(SPI1_MI, SPI1_A_MI), - PAD_FUNC(SPI1_CSB, SPI1_A_CSB), + PAD_FUNC_GPIO(SPI1_CSB), PAD_FUNC(SPI1_MO, SPI1_A_MO), PAD_FUNC(SPI1_CLK, SPI1_A_CLK), }, { PAD_FUNC(KPCOL1, SPI2_MI), - PAD_FUNC(EINT0, SPI2_CSB), + PAD_FUNC_GPIO(EINT0), PAD_FUNC(EINT1, SPI2_MO), PAD_FUNC(EINT2, SPI2_CLK), }, { PAD_FUNC(DPI_D8, SPI3_MI), - PAD_FUNC(DPI_D9, SPI3_CSB), + PAD_FUNC_GPIO(DPI_D9), PAD_FUNC(DPI_D10, SPI3_MO), PAD_FUNC(DPI_D11, SPI3_CLK), }, { PAD_FUNC(DPI_D4, SPI4_MI), - PAD_FUNC(DPI_D5, SPI4_CSB), + PAD_FUNC_GPIO(DPI_D5), PAD_FUNC(DPI_D6, SPI4_MO), PAD_FUNC(DPI_D7, SPI4_CLK), }, { PAD_FUNC(DPI_D0, SPI5_MI), - PAD_FUNC(DPI_D1, SPI5_CSB), + PAD_FUNC_GPIO(DPI_D1), PAD_FUNC(DPI_D2, SPI5_MO), PAD_FUNC(DPI_D3, SPI5_CLK), } @@ -90,7 +97,7 @@ static const struct pad_func pad0_funcs[SPI_BUS_NUMBER][4] = { static const struct pad_func bus1_pad1_funcs[4] = { PAD_FUNC(EINT7, SPI1_B_MI), - PAD_FUNC(EINT8, SPI1_B_CSB), + PAD_FUNC_GPIO(EINT8), PAD_FUNC(EINT9, SPI1_B_MO), PAD_FUNC(EINT10, SPI1_B_CLK), }; |