From: Mason Zhang <mason.zhang@mediatek.com>
To: Mark Brown <broonie@kernel.org>,
Matthias Brugger <matthias.bgg@gmail.com>
Cc: <linux-spi@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <leilk.liu@mediatek.com>,
<wsd_upstream@mediatek.com>,
Mason Zhang <Mason.Zhang@mediatek.com>
Subject: [PATCH 1/2] spi: mediatek: add tick_delay support
Date: Tue, 13 Jul 2021 19:40:49 +0800 [thread overview]
Message-ID: <20210713114048.29509-1-mason.zhang@mediatek.com> (raw)
From: Mason Zhang <Mason.Zhang@mediatek.com>
This patch support tick_delay setting, some users need use
high-speed spi speed, which can use tick_delay to tuning spi clk timing.
Signed-off-by: Mason Zhang <Mason.Zhang@mediatek.com>
---
drivers/spi/spi-mt65xx.c | 11 ++++++++++-
include/linux/platform_data/spi-mt65xx.h | 1 +
2 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 097625d7915e..b34fbc913fd6 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -42,8 +42,9 @@
#define SPI_CFG1_CS_IDLE_OFFSET 0
#define SPI_CFG1_PACKET_LOOP_OFFSET 8
#define SPI_CFG1_PACKET_LENGTH_OFFSET 16
-#define SPI_CFG1_GET_TICK_DLY_OFFSET 30
+#define SPI_CFG1_GET_TICK_DLY_OFFSET 29
+#define SPI_CFG1_GET_TICK_DLY_MASK 0xe0000000
#define SPI_CFG1_CS_IDLE_MASK 0xff
#define SPI_CFG1_PACKET_LOOP_MASK 0xff00
#define SPI_CFG1_PACKET_LENGTH_MASK 0x3ff0000
@@ -152,6 +153,7 @@ static const struct mtk_spi_compatible mt6893_compat = {
*/
static const struct mtk_chip_config mtk_default_chip_info = {
.sample_sel = 0,
+ .tick_delay = 0,
};
static const struct of_device_id mtk_spi_of_match[] = {
@@ -275,6 +277,13 @@ static int mtk_spi_prepare_message(struct spi_master *master,
writel(mdata->pad_sel[spi->chip_select],
mdata->base + SPI_PAD_SEL_REG);
+ /* tick delay */
+ reg_val = readl(mdata->base + SPI_CFG1_REG);
+ reg_val &= ~SPI_CFG1_GET_TICK_DLY_MASK;
+ reg_val |= ((chip_config->tick_delay & 0x7)
+ << SPI_CFG1_GET_TICK_DLY_OFFSET);
+ writel(reg_val, mdata->base + SPI_CFG1_REG);
+
return 0;
}
diff --git a/include/linux/platform_data/spi-mt65xx.h b/include/linux/platform_data/spi-mt65xx.h
index 65fd5ffd257c..f0db674f07b8 100644
--- a/include/linux/platform_data/spi-mt65xx.h
+++ b/include/linux/platform_data/spi-mt65xx.h
@@ -12,5 +12,6 @@
/* Board specific platform_data */
struct mtk_chip_config {
u32 sample_sel;
+ u32 tick_delay;
};
#endif
--
2.18.0
next reply other threads:[~2021-07-13 11:57 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-13 11:40 Mason Zhang [this message]
2021-07-14 15:55 ` [PATCH 1/2] spi: mediatek: add tick_delay support Mark Brown
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