All of lore.kernel.org
 help / color / mirror / Atom feed
* [PATCH v2 3/4] spi: mediatek: modify set_cs_timing callback
@ 2021-08-03 10:24 ` Mason Zhang
  0 siblings, 0 replies; 9+ messages in thread
From: Mason Zhang @ 2021-08-03 10:24 UTC (permalink / raw)
  To: Mark Brown, Matthias Brugger
  Cc: Laxman Dewangan, linux-spi, linux-kernel, linux-arm-kernel,
	linux-mediatek, wsd_upstream, Mason Zhang

This patch modified set_cs_timing callback:
  1 support spi_device set cs_timing in their driver;
  2 support set absolute time but no clk count, because;
    clk src will change in different platform;
  3 call this function in prepare_message but not in other API.

Signed-off-by: Mason Zhang <Mason.Zhang@mediatek.com>
---
 drivers/spi/spi-mt65xx.c | 102 +++++++++++++++++++++------------------
 1 file changed, 56 insertions(+), 46 deletions(-)

diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 6f2925118b98..7a34f5b1201d 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -208,6 +208,60 @@ static void mtk_spi_reset(struct mtk_spi *mdata)
 	writel(reg_val, mdata->base + SPI_CMD_REG);
 }
 
+static int mtk_spi_set_hw_cs_timing(struct spi_device *spi)
+{
+	struct mtk_spi *mdata = spi_master_get_devdata(spi->master);
+	struct spi_delay *cs_setup = &spi->cs_setup;
+	struct spi_delay *cs_hold = &spi->cs_hold;
+	struct spi_delay *cs_inactive = &spi->cs_inactive;
+	u16 setup, hold, inactive;
+	u32 reg_val;
+	int delay;
+
+	delay = spi_delay_to_ns(cs_setup, NULL);
+	if (delay < 0)
+		return delay;
+	setup = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000);
+
+	delay = spi_delay_to_ns(cs_hold, NULL);
+	if (delay < 0)
+		return delay;
+	hold = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000);
+
+	delay = spi_delay_to_ns(cs_inactive, NULL);
+	if (delay < 0)
+		return delay;
+	inactive = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000);
+
+	setup    = setup ? setup : 1;
+	hold     = hold ? hold : 1;
+	inactive = inactive ? inactive : 1;
+
+	reg_val = readl(mdata->base + SPI_CFG0_REG);
+	if (mdata->dev_comp->enhance_timing) {
+		reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
+		reg_val |= (((hold - 1) & 0xffff)
+			   << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
+		reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
+		reg_val |= (((setup - 1) & 0xffff)
+			   << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
+	} else {
+		reg_val &= ~(0xff << SPI_CFG0_CS_HOLD_OFFSET);
+		reg_val |= (((hold - 1) & 0xff) << SPI_CFG0_CS_HOLD_OFFSET);
+		reg_val &= ~(0xff << SPI_CFG0_CS_SETUP_OFFSET);
+		reg_val |= (((setup - 1) & 0xff)
+			    << SPI_CFG0_CS_SETUP_OFFSET);
+	}
+	writel(reg_val, mdata->base + SPI_CFG0_REG);
+
+	reg_val = readl(mdata->base + SPI_CFG1_REG);
+	reg_val &= ~SPI_CFG1_CS_IDLE_MASK;
+	reg_val |= (((inactive - 1) & 0xff) << SPI_CFG1_CS_IDLE_OFFSET);
+	writel(reg_val, mdata->base + SPI_CFG1_REG);
+
+	return 0;
+}
+
 static int mtk_spi_prepare_message(struct spi_master *master,
 				   struct spi_message *msg)
 {
@@ -284,6 +338,8 @@ static int mtk_spi_prepare_message(struct spi_master *master,
 		<< SPI_CFG1_GET_TICK_DLY_OFFSET);
 	writel(reg_val, mdata->base + SPI_CFG1_REG);
 
+	/* set hw cs timing */
+	mtk_spi_set_hw_cs_timing(spi);
 	return 0;
 }
 
@@ -528,52 +584,6 @@ static bool mtk_spi_can_dma(struct spi_master *master,
 		(unsigned long)xfer->rx_buf % 4 == 0);
 }
 
-static int mtk_spi_set_hw_cs_timing(struct spi_device *spi,
-				    struct spi_delay *setup,
-				    struct spi_delay *hold,
-				    struct spi_delay *inactive)
-{
-	struct mtk_spi *mdata = spi_master_get_devdata(spi->master);
-	u16 setup_dly, hold_dly, inactive_dly;
-	u32 reg_val;
-
-	if ((setup && setup->unit != SPI_DELAY_UNIT_SCK) ||
-	    (hold && hold->unit != SPI_DELAY_UNIT_SCK) ||
-	    (inactive && inactive->unit != SPI_DELAY_UNIT_SCK)) {
-		dev_err(&spi->dev,
-			"Invalid delay unit, should be SPI_DELAY_UNIT_SCK\n");
-		return -EINVAL;
-	}
-
-	setup_dly = setup ? setup->value : 1;
-	hold_dly = hold ? hold->value : 1;
-	inactive_dly = inactive ? inactive->value : 1;
-
-	reg_val = readl(mdata->base + SPI_CFG0_REG);
-	if (mdata->dev_comp->enhance_timing) {
-		reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
-		reg_val |= (((hold_dly - 1) & 0xffff)
-			   << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
-		reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
-		reg_val |= (((setup_dly - 1) & 0xffff)
-			   << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
-	} else {
-		reg_val &= ~(0xff << SPI_CFG0_CS_HOLD_OFFSET);
-		reg_val |= (((hold_dly - 1) & 0xff) << SPI_CFG0_CS_HOLD_OFFSET);
-		reg_val &= ~(0xff << SPI_CFG0_CS_SETUP_OFFSET);
-		reg_val |= (((setup_dly - 1) & 0xff)
-			    << SPI_CFG0_CS_SETUP_OFFSET);
-	}
-	writel(reg_val, mdata->base + SPI_CFG0_REG);
-
-	reg_val = readl(mdata->base + SPI_CFG1_REG);
-	reg_val &= ~SPI_CFG1_CS_IDLE_MASK;
-	reg_val |= (((inactive_dly - 1) & 0xff) << SPI_CFG1_CS_IDLE_OFFSET);
-	writel(reg_val, mdata->base + SPI_CFG1_REG);
-
-	return 0;
-}
-
 static int mtk_spi_setup(struct spi_device *spi)
 {
 	struct mtk_spi *mdata = spi_master_get_devdata(spi->master);
-- 
2.18.0


^ permalink raw reply related	[flat|nested] 9+ messages in thread

* [PATCH v2 3/4] spi: mediatek: modify set_cs_timing callback
@ 2021-08-03 10:24 ` Mason Zhang
  0 siblings, 0 replies; 9+ messages in thread
From: Mason Zhang @ 2021-08-03 10:24 UTC (permalink / raw)
  To: Mark Brown, Matthias Brugger
  Cc: Laxman Dewangan, linux-spi, linux-kernel, linux-arm-kernel,
	linux-mediatek, wsd_upstream, Mason Zhang

This patch modified set_cs_timing callback:
  1 support spi_device set cs_timing in their driver;
  2 support set absolute time but no clk count, because;
    clk src will change in different platform;
  3 call this function in prepare_message but not in other API.

Signed-off-by: Mason Zhang <Mason.Zhang@mediatek.com>
---
 drivers/spi/spi-mt65xx.c | 102 +++++++++++++++++++++------------------
 1 file changed, 56 insertions(+), 46 deletions(-)

diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 6f2925118b98..7a34f5b1201d 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -208,6 +208,60 @@ static void mtk_spi_reset(struct mtk_spi *mdata)
 	writel(reg_val, mdata->base + SPI_CMD_REG);
 }
 
+static int mtk_spi_set_hw_cs_timing(struct spi_device *spi)
+{
+	struct mtk_spi *mdata = spi_master_get_devdata(spi->master);
+	struct spi_delay *cs_setup = &spi->cs_setup;
+	struct spi_delay *cs_hold = &spi->cs_hold;
+	struct spi_delay *cs_inactive = &spi->cs_inactive;
+	u16 setup, hold, inactive;
+	u32 reg_val;
+	int delay;
+
+	delay = spi_delay_to_ns(cs_setup, NULL);
+	if (delay < 0)
+		return delay;
+	setup = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000);
+
+	delay = spi_delay_to_ns(cs_hold, NULL);
+	if (delay < 0)
+		return delay;
+	hold = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000);
+
+	delay = spi_delay_to_ns(cs_inactive, NULL);
+	if (delay < 0)
+		return delay;
+	inactive = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000);
+
+	setup    = setup ? setup : 1;
+	hold     = hold ? hold : 1;
+	inactive = inactive ? inactive : 1;
+
+	reg_val = readl(mdata->base + SPI_CFG0_REG);
+	if (mdata->dev_comp->enhance_timing) {
+		reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
+		reg_val |= (((hold - 1) & 0xffff)
+			   << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
+		reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
+		reg_val |= (((setup - 1) & 0xffff)
+			   << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
+	} else {
+		reg_val &= ~(0xff << SPI_CFG0_CS_HOLD_OFFSET);
+		reg_val |= (((hold - 1) & 0xff) << SPI_CFG0_CS_HOLD_OFFSET);
+		reg_val &= ~(0xff << SPI_CFG0_CS_SETUP_OFFSET);
+		reg_val |= (((setup - 1) & 0xff)
+			    << SPI_CFG0_CS_SETUP_OFFSET);
+	}
+	writel(reg_val, mdata->base + SPI_CFG0_REG);
+
+	reg_val = readl(mdata->base + SPI_CFG1_REG);
+	reg_val &= ~SPI_CFG1_CS_IDLE_MASK;
+	reg_val |= (((inactive - 1) & 0xff) << SPI_CFG1_CS_IDLE_OFFSET);
+	writel(reg_val, mdata->base + SPI_CFG1_REG);
+
+	return 0;
+}
+
 static int mtk_spi_prepare_message(struct spi_master *master,
 				   struct spi_message *msg)
 {
@@ -284,6 +338,8 @@ static int mtk_spi_prepare_message(struct spi_master *master,
 		<< SPI_CFG1_GET_TICK_DLY_OFFSET);
 	writel(reg_val, mdata->base + SPI_CFG1_REG);
 
+	/* set hw cs timing */
+	mtk_spi_set_hw_cs_timing(spi);
 	return 0;
 }
 
@@ -528,52 +584,6 @@ static bool mtk_spi_can_dma(struct spi_master *master,
 		(unsigned long)xfer->rx_buf % 4 == 0);
 }
 
-static int mtk_spi_set_hw_cs_timing(struct spi_device *spi,
-				    struct spi_delay *setup,
-				    struct spi_delay *hold,
-				    struct spi_delay *inactive)
-{
-	struct mtk_spi *mdata = spi_master_get_devdata(spi->master);
-	u16 setup_dly, hold_dly, inactive_dly;
-	u32 reg_val;
-
-	if ((setup && setup->unit != SPI_DELAY_UNIT_SCK) ||
-	    (hold && hold->unit != SPI_DELAY_UNIT_SCK) ||
-	    (inactive && inactive->unit != SPI_DELAY_UNIT_SCK)) {
-		dev_err(&spi->dev,
-			"Invalid delay unit, should be SPI_DELAY_UNIT_SCK\n");
-		return -EINVAL;
-	}
-
-	setup_dly = setup ? setup->value : 1;
-	hold_dly = hold ? hold->value : 1;
-	inactive_dly = inactive ? inactive->value : 1;
-
-	reg_val = readl(mdata->base + SPI_CFG0_REG);
-	if (mdata->dev_comp->enhance_timing) {
-		reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
-		reg_val |= (((hold_dly - 1) & 0xffff)
-			   << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
-		reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
-		reg_val |= (((setup_dly - 1) & 0xffff)
-			   << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
-	} else {
-		reg_val &= ~(0xff << SPI_CFG0_CS_HOLD_OFFSET);
-		reg_val |= (((hold_dly - 1) & 0xff) << SPI_CFG0_CS_HOLD_OFFSET);
-		reg_val &= ~(0xff << SPI_CFG0_CS_SETUP_OFFSET);
-		reg_val |= (((setup_dly - 1) & 0xff)
-			    << SPI_CFG0_CS_SETUP_OFFSET);
-	}
-	writel(reg_val, mdata->base + SPI_CFG0_REG);
-
-	reg_val = readl(mdata->base + SPI_CFG1_REG);
-	reg_val &= ~SPI_CFG1_CS_IDLE_MASK;
-	reg_val |= (((inactive_dly - 1) & 0xff) << SPI_CFG1_CS_IDLE_OFFSET);
-	writel(reg_val, mdata->base + SPI_CFG1_REG);
-
-	return 0;
-}
-
 static int mtk_spi_setup(struct spi_device *spi)
 {
 	struct mtk_spi *mdata = spi_master_get_devdata(spi->master);
-- 
2.18.0
_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

^ permalink raw reply related	[flat|nested] 9+ messages in thread

* [PATCH v2 3/4] spi: mediatek: modify set_cs_timing callback
@ 2021-08-03 10:24 ` Mason Zhang
  0 siblings, 0 replies; 9+ messages in thread
From: Mason Zhang @ 2021-08-03 10:24 UTC (permalink / raw)
  To: Mark Brown, Matthias Brugger
  Cc: Laxman Dewangan, linux-spi, linux-kernel, linux-arm-kernel,
	linux-mediatek, wsd_upstream, Mason Zhang

This patch modified set_cs_timing callback:
  1 support spi_device set cs_timing in their driver;
  2 support set absolute time but no clk count, because;
    clk src will change in different platform;
  3 call this function in prepare_message but not in other API.

Signed-off-by: Mason Zhang <Mason.Zhang@mediatek.com>
---
 drivers/spi/spi-mt65xx.c | 102 +++++++++++++++++++++------------------
 1 file changed, 56 insertions(+), 46 deletions(-)

diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 6f2925118b98..7a34f5b1201d 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -208,6 +208,60 @@ static void mtk_spi_reset(struct mtk_spi *mdata)
 	writel(reg_val, mdata->base + SPI_CMD_REG);
 }
 
+static int mtk_spi_set_hw_cs_timing(struct spi_device *spi)
+{
+	struct mtk_spi *mdata = spi_master_get_devdata(spi->master);
+	struct spi_delay *cs_setup = &spi->cs_setup;
+	struct spi_delay *cs_hold = &spi->cs_hold;
+	struct spi_delay *cs_inactive = &spi->cs_inactive;
+	u16 setup, hold, inactive;
+	u32 reg_val;
+	int delay;
+
+	delay = spi_delay_to_ns(cs_setup, NULL);
+	if (delay < 0)
+		return delay;
+	setup = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000);
+
+	delay = spi_delay_to_ns(cs_hold, NULL);
+	if (delay < 0)
+		return delay;
+	hold = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000);
+
+	delay = spi_delay_to_ns(cs_inactive, NULL);
+	if (delay < 0)
+		return delay;
+	inactive = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000);
+
+	setup    = setup ? setup : 1;
+	hold     = hold ? hold : 1;
+	inactive = inactive ? inactive : 1;
+
+	reg_val = readl(mdata->base + SPI_CFG0_REG);
+	if (mdata->dev_comp->enhance_timing) {
+		reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
+		reg_val |= (((hold - 1) & 0xffff)
+			   << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
+		reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
+		reg_val |= (((setup - 1) & 0xffff)
+			   << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
+	} else {
+		reg_val &= ~(0xff << SPI_CFG0_CS_HOLD_OFFSET);
+		reg_val |= (((hold - 1) & 0xff) << SPI_CFG0_CS_HOLD_OFFSET);
+		reg_val &= ~(0xff << SPI_CFG0_CS_SETUP_OFFSET);
+		reg_val |= (((setup - 1) & 0xff)
+			    << SPI_CFG0_CS_SETUP_OFFSET);
+	}
+	writel(reg_val, mdata->base + SPI_CFG0_REG);
+
+	reg_val = readl(mdata->base + SPI_CFG1_REG);
+	reg_val &= ~SPI_CFG1_CS_IDLE_MASK;
+	reg_val |= (((inactive - 1) & 0xff) << SPI_CFG1_CS_IDLE_OFFSET);
+	writel(reg_val, mdata->base + SPI_CFG1_REG);
+
+	return 0;
+}
+
 static int mtk_spi_prepare_message(struct spi_master *master,
 				   struct spi_message *msg)
 {
@@ -284,6 +338,8 @@ static int mtk_spi_prepare_message(struct spi_master *master,
 		<< SPI_CFG1_GET_TICK_DLY_OFFSET);
 	writel(reg_val, mdata->base + SPI_CFG1_REG);
 
+	/* set hw cs timing */
+	mtk_spi_set_hw_cs_timing(spi);
 	return 0;
 }
 
@@ -528,52 +584,6 @@ static bool mtk_spi_can_dma(struct spi_master *master,
 		(unsigned long)xfer->rx_buf % 4 == 0);
 }
 
-static int mtk_spi_set_hw_cs_timing(struct spi_device *spi,
-				    struct spi_delay *setup,
-				    struct spi_delay *hold,
-				    struct spi_delay *inactive)
-{
-	struct mtk_spi *mdata = spi_master_get_devdata(spi->master);
-	u16 setup_dly, hold_dly, inactive_dly;
-	u32 reg_val;
-
-	if ((setup && setup->unit != SPI_DELAY_UNIT_SCK) ||
-	    (hold && hold->unit != SPI_DELAY_UNIT_SCK) ||
-	    (inactive && inactive->unit != SPI_DELAY_UNIT_SCK)) {
-		dev_err(&spi->dev,
-			"Invalid delay unit, should be SPI_DELAY_UNIT_SCK\n");
-		return -EINVAL;
-	}
-
-	setup_dly = setup ? setup->value : 1;
-	hold_dly = hold ? hold->value : 1;
-	inactive_dly = inactive ? inactive->value : 1;
-
-	reg_val = readl(mdata->base + SPI_CFG0_REG);
-	if (mdata->dev_comp->enhance_timing) {
-		reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
-		reg_val |= (((hold_dly - 1) & 0xffff)
-			   << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
-		reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
-		reg_val |= (((setup_dly - 1) & 0xffff)
-			   << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
-	} else {
-		reg_val &= ~(0xff << SPI_CFG0_CS_HOLD_OFFSET);
-		reg_val |= (((hold_dly - 1) & 0xff) << SPI_CFG0_CS_HOLD_OFFSET);
-		reg_val &= ~(0xff << SPI_CFG0_CS_SETUP_OFFSET);
-		reg_val |= (((setup_dly - 1) & 0xff)
-			    << SPI_CFG0_CS_SETUP_OFFSET);
-	}
-	writel(reg_val, mdata->base + SPI_CFG0_REG);
-
-	reg_val = readl(mdata->base + SPI_CFG1_REG);
-	reg_val &= ~SPI_CFG1_CS_IDLE_MASK;
-	reg_val |= (((inactive_dly - 1) & 0xff) << SPI_CFG1_CS_IDLE_OFFSET);
-	writel(reg_val, mdata->base + SPI_CFG1_REG);
-
-	return 0;
-}
-
 static int mtk_spi_setup(struct spi_device *spi)
 {
 	struct mtk_spi *mdata = spi_master_get_devdata(spi->master);
-- 
2.18.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply related	[flat|nested] 9+ messages in thread

* Re: [PATCH v2 3/4] spi: mediatek: modify set_cs_timing callback
  2021-08-03 10:24 ` Mason Zhang
  (?)
@ 2021-08-03 18:20   ` Andy Shevchenko
  -1 siblings, 0 replies; 9+ messages in thread
From: Andy Shevchenko @ 2021-08-03 18:20 UTC (permalink / raw)
  To: Mason Zhang
  Cc: Mark Brown, Matthias Brugger, Laxman Dewangan, linux-spi,
	Linux Kernel Mailing List, linux-arm Mailing List,
	moderated list:ARM/Mediatek SoC support, Mediatek WSD Upstream

On Tue, Aug 3, 2021 at 1:42 PM Mason Zhang <Mason.Zhang@mediatek.com> wrote:
>
> This patch modified set_cs_timing callback:
>   1 support spi_device set cs_timing in their driver;
>   2 support set absolute time but no clk count, because;
>     clk src will change in different platform;
>   3 call this function in prepare_message but not in other API.

Perhaps it should be 3 patches?

...

> +static int mtk_spi_set_hw_cs_timing(struct spi_device *spi)
> +{
> +       struct mtk_spi *mdata = spi_master_get_devdata(spi->master);
> +       struct spi_delay *cs_setup = &spi->cs_setup;
> +       struct spi_delay *cs_hold = &spi->cs_hold;
> +       struct spi_delay *cs_inactive = &spi->cs_inactive;
> +       u16 setup, hold, inactive;
> +       u32 reg_val;
> +       int delay;
> +
> +       delay = spi_delay_to_ns(cs_setup, NULL);
> +       if (delay < 0)
> +               return delay;
> +       setup = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000);

1000 is NSEC_PER_USEC (here and below)?

> +       delay = spi_delay_to_ns(cs_hold, NULL);
> +       if (delay < 0)
> +               return delay;
> +       hold = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000);
> +
> +       delay = spi_delay_to_ns(cs_inactive, NULL);
> +       if (delay < 0)
> +               return delay;
> +       inactive = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000);

> +       setup    = setup ? setup : 1;
> +       hold     = hold ? hold : 1;
> +       inactive = inactive ? inactive : 1;

All of these can be simplified by using ?: (short ternary) form.

> +       reg_val = readl(mdata->base + SPI_CFG0_REG);
> +       if (mdata->dev_comp->enhance_timing) {
> +               reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
> +               reg_val |= (((hold - 1) & 0xffff)
> +                          << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
> +               reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
> +               reg_val |= (((setup - 1) & 0xffff)
> +                          << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
> +       } else {
> +               reg_val &= ~(0xff << SPI_CFG0_CS_HOLD_OFFSET);
> +               reg_val |= (((hold - 1) & 0xff) << SPI_CFG0_CS_HOLD_OFFSET);
> +               reg_val &= ~(0xff << SPI_CFG0_CS_SETUP_OFFSET);
> +               reg_val |= (((setup - 1) & 0xff)
> +                           << SPI_CFG0_CS_SETUP_OFFSET);
> +       }
> +       writel(reg_val, mdata->base + SPI_CFG0_REG);
> +
> +       reg_val = readl(mdata->base + SPI_CFG1_REG);
> +       reg_val &= ~SPI_CFG1_CS_IDLE_MASK;
> +       reg_val |= (((inactive - 1) & 0xff) << SPI_CFG1_CS_IDLE_OFFSET);
> +       writel(reg_val, mdata->base + SPI_CFG1_REG);
> +
> +       return 0;
> +}

-- 
With Best Regards,
Andy Shevchenko

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH v2 3/4] spi: mediatek: modify set_cs_timing callback
@ 2021-08-03 18:20   ` Andy Shevchenko
  0 siblings, 0 replies; 9+ messages in thread
From: Andy Shevchenko @ 2021-08-03 18:20 UTC (permalink / raw)
  To: Mason Zhang
  Cc: Mark Brown, Matthias Brugger, Laxman Dewangan, linux-spi,
	Linux Kernel Mailing List, linux-arm Mailing List,
	moderated list:ARM/Mediatek SoC support, Mediatek WSD Upstream

On Tue, Aug 3, 2021 at 1:42 PM Mason Zhang <Mason.Zhang@mediatek.com> wrote:
>
> This patch modified set_cs_timing callback:
>   1 support spi_device set cs_timing in their driver;
>   2 support set absolute time but no clk count, because;
>     clk src will change in different platform;
>   3 call this function in prepare_message but not in other API.

Perhaps it should be 3 patches?

...

> +static int mtk_spi_set_hw_cs_timing(struct spi_device *spi)
> +{
> +       struct mtk_spi *mdata = spi_master_get_devdata(spi->master);
> +       struct spi_delay *cs_setup = &spi->cs_setup;
> +       struct spi_delay *cs_hold = &spi->cs_hold;
> +       struct spi_delay *cs_inactive = &spi->cs_inactive;
> +       u16 setup, hold, inactive;
> +       u32 reg_val;
> +       int delay;
> +
> +       delay = spi_delay_to_ns(cs_setup, NULL);
> +       if (delay < 0)
> +               return delay;
> +       setup = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000);

1000 is NSEC_PER_USEC (here and below)?

> +       delay = spi_delay_to_ns(cs_hold, NULL);
> +       if (delay < 0)
> +               return delay;
> +       hold = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000);
> +
> +       delay = spi_delay_to_ns(cs_inactive, NULL);
> +       if (delay < 0)
> +               return delay;
> +       inactive = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000);

> +       setup    = setup ? setup : 1;
> +       hold     = hold ? hold : 1;
> +       inactive = inactive ? inactive : 1;

All of these can be simplified by using ?: (short ternary) form.

> +       reg_val = readl(mdata->base + SPI_CFG0_REG);
> +       if (mdata->dev_comp->enhance_timing) {
> +               reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
> +               reg_val |= (((hold - 1) & 0xffff)
> +                          << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
> +               reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
> +               reg_val |= (((setup - 1) & 0xffff)
> +                          << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
> +       } else {
> +               reg_val &= ~(0xff << SPI_CFG0_CS_HOLD_OFFSET);
> +               reg_val |= (((hold - 1) & 0xff) << SPI_CFG0_CS_HOLD_OFFSET);
> +               reg_val &= ~(0xff << SPI_CFG0_CS_SETUP_OFFSET);
> +               reg_val |= (((setup - 1) & 0xff)
> +                           << SPI_CFG0_CS_SETUP_OFFSET);
> +       }
> +       writel(reg_val, mdata->base + SPI_CFG0_REG);
> +
> +       reg_val = readl(mdata->base + SPI_CFG1_REG);
> +       reg_val &= ~SPI_CFG1_CS_IDLE_MASK;
> +       reg_val |= (((inactive - 1) & 0xff) << SPI_CFG1_CS_IDLE_OFFSET);
> +       writel(reg_val, mdata->base + SPI_CFG1_REG);
> +
> +       return 0;
> +}

-- 
With Best Regards,
Andy Shevchenko

_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH v2 3/4] spi: mediatek: modify set_cs_timing callback
@ 2021-08-03 18:20   ` Andy Shevchenko
  0 siblings, 0 replies; 9+ messages in thread
From: Andy Shevchenko @ 2021-08-03 18:20 UTC (permalink / raw)
  To: Mason Zhang
  Cc: Mark Brown, Matthias Brugger, Laxman Dewangan, linux-spi,
	Linux Kernel Mailing List, linux-arm Mailing List,
	moderated list:ARM/Mediatek SoC support, Mediatek WSD Upstream

On Tue, Aug 3, 2021 at 1:42 PM Mason Zhang <Mason.Zhang@mediatek.com> wrote:
>
> This patch modified set_cs_timing callback:
>   1 support spi_device set cs_timing in their driver;
>   2 support set absolute time but no clk count, because;
>     clk src will change in different platform;
>   3 call this function in prepare_message but not in other API.

Perhaps it should be 3 patches?

...

> +static int mtk_spi_set_hw_cs_timing(struct spi_device *spi)
> +{
> +       struct mtk_spi *mdata = spi_master_get_devdata(spi->master);
> +       struct spi_delay *cs_setup = &spi->cs_setup;
> +       struct spi_delay *cs_hold = &spi->cs_hold;
> +       struct spi_delay *cs_inactive = &spi->cs_inactive;
> +       u16 setup, hold, inactive;
> +       u32 reg_val;
> +       int delay;
> +
> +       delay = spi_delay_to_ns(cs_setup, NULL);
> +       if (delay < 0)
> +               return delay;
> +       setup = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000);

1000 is NSEC_PER_USEC (here and below)?

> +       delay = spi_delay_to_ns(cs_hold, NULL);
> +       if (delay < 0)
> +               return delay;
> +       hold = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000);
> +
> +       delay = spi_delay_to_ns(cs_inactive, NULL);
> +       if (delay < 0)
> +               return delay;
> +       inactive = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000);

> +       setup    = setup ? setup : 1;
> +       hold     = hold ? hold : 1;
> +       inactive = inactive ? inactive : 1;

All of these can be simplified by using ?: (short ternary) form.

> +       reg_val = readl(mdata->base + SPI_CFG0_REG);
> +       if (mdata->dev_comp->enhance_timing) {
> +               reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
> +               reg_val |= (((hold - 1) & 0xffff)
> +                          << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
> +               reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
> +               reg_val |= (((setup - 1) & 0xffff)
> +                          << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
> +       } else {
> +               reg_val &= ~(0xff << SPI_CFG0_CS_HOLD_OFFSET);
> +               reg_val |= (((hold - 1) & 0xff) << SPI_CFG0_CS_HOLD_OFFSET);
> +               reg_val &= ~(0xff << SPI_CFG0_CS_SETUP_OFFSET);
> +               reg_val |= (((setup - 1) & 0xff)
> +                           << SPI_CFG0_CS_SETUP_OFFSET);
> +       }
> +       writel(reg_val, mdata->base + SPI_CFG0_REG);
> +
> +       reg_val = readl(mdata->base + SPI_CFG1_REG);
> +       reg_val &= ~SPI_CFG1_CS_IDLE_MASK;
> +       reg_val |= (((inactive - 1) & 0xff) << SPI_CFG1_CS_IDLE_OFFSET);
> +       writel(reg_val, mdata->base + SPI_CFG1_REG);
> +
> +       return 0;
> +}

-- 
With Best Regards,
Andy Shevchenko

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH v2 3/4] spi: mediatek: modify set_cs_timing callback
  2021-08-03 18:20   ` Andy Shevchenko
  (?)
@ 2021-08-03 19:30     ` Mark Brown
  -1 siblings, 0 replies; 9+ messages in thread
From: Mark Brown @ 2021-08-03 19:30 UTC (permalink / raw)
  To: Andy Shevchenko
  Cc: Mason Zhang, Matthias Brugger, Laxman Dewangan, linux-spi,
	Linux Kernel Mailing List, linux-arm Mailing List,
	moderated list:ARM/Mediatek SoC support, Mediatek WSD Upstream

[-- Attachment #1: Type: text/plain, Size: 387 bytes --]

On Tue, Aug 03, 2021 at 09:20:19PM +0300, Andy Shevchenko wrote:
> On Tue, Aug 3, 2021 at 1:42 PM Mason Zhang <Mason.Zhang@mediatek.com> wrote:

> > +       inactive = inactive ? inactive : 1;

> All of these can be simplified by using ?: (short ternary) form.

Please don't, if anything just don't use the ternery operator at all for
things like this - it doesn't help with legibility.

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH v2 3/4] spi: mediatek: modify set_cs_timing callback
@ 2021-08-03 19:30     ` Mark Brown
  0 siblings, 0 replies; 9+ messages in thread
From: Mark Brown @ 2021-08-03 19:30 UTC (permalink / raw)
  To: Andy Shevchenko
  Cc: Mason Zhang, Matthias Brugger, Laxman Dewangan, linux-spi,
	Linux Kernel Mailing List, linux-arm Mailing List,
	moderated list:ARM/Mediatek SoC support, Mediatek WSD Upstream


[-- Attachment #1.1: Type: text/plain, Size: 387 bytes --]

On Tue, Aug 03, 2021 at 09:20:19PM +0300, Andy Shevchenko wrote:
> On Tue, Aug 3, 2021 at 1:42 PM Mason Zhang <Mason.Zhang@mediatek.com> wrote:

> > +       inactive = inactive ? inactive : 1;

> All of these can be simplified by using ?: (short ternary) form.

Please don't, if anything just don't use the ternery operator at all for
things like this - it doesn't help with legibility.

[-- Attachment #1.2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]

[-- Attachment #2: Type: text/plain, Size: 170 bytes --]

_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH v2 3/4] spi: mediatek: modify set_cs_timing callback
@ 2021-08-03 19:30     ` Mark Brown
  0 siblings, 0 replies; 9+ messages in thread
From: Mark Brown @ 2021-08-03 19:30 UTC (permalink / raw)
  To: Andy Shevchenko
  Cc: Mason Zhang, Matthias Brugger, Laxman Dewangan, linux-spi,
	Linux Kernel Mailing List, linux-arm Mailing List,
	moderated list:ARM/Mediatek SoC support, Mediatek WSD Upstream


[-- Attachment #1.1: Type: text/plain, Size: 387 bytes --]

On Tue, Aug 03, 2021 at 09:20:19PM +0300, Andy Shevchenko wrote:
> On Tue, Aug 3, 2021 at 1:42 PM Mason Zhang <Mason.Zhang@mediatek.com> wrote:

> > +       inactive = inactive ? inactive : 1;

> All of these can be simplified by using ?: (short ternary) form.

Please don't, if anything just don't use the ternery operator at all for
things like this - it doesn't help with legibility.

[-- Attachment #1.2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]

[-- Attachment #2: Type: text/plain, Size: 176 bytes --]

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2021-08-03 19:32 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-08-03 10:24 [PATCH v2 3/4] spi: mediatek: modify set_cs_timing callback Mason Zhang
2021-08-03 10:24 ` Mason Zhang
2021-08-03 10:24 ` Mason Zhang
2021-08-03 18:20 ` Andy Shevchenko
2021-08-03 18:20   ` Andy Shevchenko
2021-08-03 18:20   ` Andy Shevchenko
2021-08-03 19:30   ` Mark Brown
2021-08-03 19:30     ` Mark Brown
2021-08-03 19:30     ` Mark Brown

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.