diff options
| author | Mengqi Zhang <Mengqi.Zhang@mediatek.com> | 2019-04-24 11:11:52 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-06-21 08:38:41 +0000 |
| commit | 026be3d76f3934eb901485acd98e0d84f137068f (patch) | |
| tree | c269b874ad1fccd60889cc0fac94dd1f746608a7 /src/soc/mediatek/mt8173 | |
| parent | 89b1753c2289edacca05ef46e840f212f2a3025d (diff) | |
mediatek: Add SPI tick_dly setting
Add spi tick_dly setting for high-speed spi xfer.
BUG=b:80501386
BRANCH=none
TEST=emerge-kukui coreboot; emerge-elm coreboot
Change-Id: Ie49fc3efe2a4a6dcdf2a2fc4c91b47e35d4f086e
Signed-off-by: Mengqi Zhang <Mengqi.Zhang@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32461
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Diffstat (limited to 'src/soc/mediatek/mt8173')
| -rw-r--r-- | src/soc/mediatek/mt8173/include/soc/spi.h | 5 | ||||
| -rw-r--r-- | src/soc/mediatek/mt8173/spi.c | 7 |
2 files changed, 10 insertions, 2 deletions
diff --git a/src/soc/mediatek/mt8173/include/soc/spi.h b/src/soc/mediatek/mt8173/include/soc/spi.h index aaef3aa25c..58bf517f9d 100644 --- a/src/soc/mediatek/mt8173/include/soc/spi.h +++ b/src/soc/mediatek/mt8173/include/soc/spi.h @@ -43,4 +43,9 @@ enum { SPI_CFG0_CS_SETUP_SHIFT = 24, }; +enum { + SPI_CFG1_TICK_DLY_SHIFT = 30, + SPI_CFG1_TICK_DLY_MASK = 0x3 << SPI_CFG1_TICK_DLY_SHIFT, +}; + #endif diff --git a/src/soc/mediatek/mt8173/spi.c b/src/soc/mediatek/mt8173/spi.c index 0cc8377ff4..d0094418b8 100644 --- a/src/soc/mediatek/mt8173/spi.c +++ b/src/soc/mediatek/mt8173/spi.c @@ -38,14 +38,17 @@ void mtk_spi_set_gpio_pinmux(unsigned int bus, gpio_set_mode(GPIO(MSDC2_CMD), PAD_MSDC2_CMD_FUNC_SPI_CS_1); } -void mtk_spi_set_timing(struct mtk_spi_regs *regs, u32 sck_ticks, u32 cs_ticks) +void mtk_spi_set_timing(struct mtk_spi_regs *regs, u32 sck_ticks, u32 cs_ticks, + unsigned int tick_dly) { write32(®s->spi_cfg0_reg, ((sck_ticks - 1) << SPI_CFG0_SCK_HIGH_SHIFT) | ((sck_ticks - 1) << SPI_CFG0_SCK_LOW_SHIFT) | ((cs_ticks - 1) << SPI_CFG0_CS_HOLD_SHIFT) | ((cs_ticks - 1) << SPI_CFG0_CS_SETUP_SHIFT)); - clrsetbits_le32(®s->spi_cfg1_reg, SPI_CFG1_CS_IDLE_MASK, + clrsetbits_le32(®s->spi_cfg1_reg, SPI_CFG1_CS_IDLE_MASK | + SPI_CFG1_TICK_DLY_MASK, + (tick_dly << SPI_CFG1_TICK_DLY_SHIFT) | ((cs_ticks - 1) << SPI_CFG1_CS_IDLE_SHIFT)); } |