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mediatek: Add SPI tick_dly setting

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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>
This commit is contained in:
Mengqi Zhang
2019-04-24 11:11:52 +08:00
committed by Patrick Georgi
parent 89b1753c22
commit 026be3d76f
9 changed files with 33 additions and 12 deletions
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5
src/soc/mediatek/common/include/soc/spi_common.h
View File

@@ -84,8 +84,9 @@ extern struct mtk_spi_bus spi_bus[];
void mtk_spi_set_gpio_pinmux(unsigned int bus,
enum spi_pad_mask pad_select);
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);
void mtk_spi_init(unsigned int bus, enum spi_pad_mask pad_select,
unsigned int speed_hz);
unsigned int speed_hz, unsigned int tick_dly);
#endif

4
src/soc/mediatek/common/spi.c
View File

@@ -53,7 +53,7 @@ static void spi_sw_reset(struct mtk_spi_regs *regs)
}
void mtk_spi_init(unsigned int bus, enum spi_pad_mask pad_select,
unsigned int speed_hz)
unsigned int speed_hz, unsigned int tick_dly)
{
u32 div, sck_ticks, cs_ticks;
@@ -73,7 +73,7 @@ void mtk_spi_init(unsigned int bus, enum spi_pad_mask pad_select,
printk(BIOS_DEBUG, "SPI%u(PAD%u) initialized at %u Hz\n",
bus, pad_select, SPI_HZ / (sck_ticks * 2));
mtk_spi_set_timing(regs, sck_ticks, cs_ticks);
mtk_spi_set_timing(regs, sck_ticks, cs_ticks, tick_dly);
clrsetbits_le32(&regs->spi_cmd_reg,
(SPI_CMD_CPHA_EN | SPI_CMD_CPOL_EN |