[PATCH v3 0/4] spi support for Exynos Auto v9 SoC

[PATCH v3 0/4] spi support for Exynos Auto v9 SoC

[Chanho Park]

Add to support Exynos Auto v9 SoC's spi. By supporting USI(Universal
Serial Interface) mode, the SoC can support up to 12 spi ports. Thus, we
need to increase MAX_SPI_PORTS from 6 to 12. The spi of the SoC can
support loopback mode unlike previous exynos SoCs. To separate the
feature, we need to add .has_loopback to the s3c64xx_spi_port_config.
Furthermore, it uses 4 as the default internal clock divider. We also
need to clk_div field of the structure and assign "2" as the default
value to the existing SoC's port config.
Device tree definitions of exynosautov9-spi will be added in separated
patchset to include usi(i2c/uart/spi) nodes all together.

Changes from v2:
- Rebase the patches on top of the latest next/master (next-20220629)
- Add Andy's R-B tags for #1, #3 and #4 patches
- Add Krzysztof's R-B tag for #4 patch
- Drop div local variable assignment as suggested by Krzysztof
- Change the data type of 'div' local variables to be consistent with
  clk_div (Pointed by Andy)

Changes from v1:
- Patch #1 "increase MAX_SPI_PORTS to 12" has been squashed to the patch #4
- Add Krzysztof's RB tags for #1 and #3 patches
- Assign clk_div value to 2 for existing SoC's port configs
- Make const of exynosautov9_spi_port_config

Chanho Park (4):
  spi: s3c64xx: support loopback mode
  spi: s3c64xx: support custom value of internal clock divider
  dt-bindings: samsung,spi: define exynosautov9 compatible
  spi: s3c64xx: add spi port configuration for Exynos Auto v9 SoC

 .../devicetree/bindings/spi/samsung,spi.yaml  |  5 +-
 drivers/spi/spi-s3c64xx.c                     | 54 +++++++++++++++----
 2 files changed, 49 insertions(+), 10 deletions(-)

-- 
2.36.1

[PATCH v3 0/4] spi support for Exynos Auto v9 SoC

[Chanho Park]

Add to support Exynos Auto v9 SoC's spi. By supporting USI(Universal
Serial Interface) mode, the SoC can support up to 12 spi ports. Thus, we
need to increase MAX_SPI_PORTS from 6 to 12. The spi of the SoC can
support loopback mode unlike previous exynos SoCs. To separate the
feature, we need to add .has_loopback to the s3c64xx_spi_port_config.
Furthermore, it uses 4 as the default internal clock divider. We also
need to clk_div field of the structure and assign "2" as the default
value to the existing SoC's port config.
Device tree definitions of exynosautov9-spi will be added in separated
patchset to include usi(i2c/uart/spi) nodes all together.

Changes from v2:
- Rebase the patches on top of the latest next/master (next-20220629)
- Add Andy's R-B tags for #1, #3 and #4 patches
- Add Krzysztof's R-B tag for #4 patch
- Drop div local variable assignment as suggested by Krzysztof
- Change the data type of 'div' local variables to be consistent with
  clk_div (Pointed by Andy)

Changes from v1:
- Patch #1 "increase MAX_SPI_PORTS to 12" has been squashed to the patch #4
- Add Krzysztof's RB tags for #1 and #3 patches
- Assign clk_div value to 2 for existing SoC's port configs
- Make const of exynosautov9_spi_port_config

Chanho Park (4):
  spi: s3c64xx: support loopback mode
  spi: s3c64xx: support custom value of internal clock divider
  dt-bindings: samsung,spi: define exynosautov9 compatible
  spi: s3c64xx: add spi port configuration for Exynos Auto v9 SoC

 .../devicetree/bindings/spi/samsung,spi.yaml  |  5 +-
 drivers/spi/spi-s3c64xx.c                     | 54 +++++++++++++++----
 2 files changed, 49 insertions(+), 10 deletions(-)

-- 
2.36.1


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[PATCH v3 1/4] spi: s3c64xx: support loopback mode

[Chanho Park]

Modern exynos SoCs can support self loopback mode via setting BIT(3) of
MODE_CFG register. Previous SoCs don't have the bit so we need to add
has_loopback field in the s3c64xx_spi_port_config. Exynos Auto v9 SoC
has the bit and it will define the field to "true".
When it is set, SPI_LOOP mode will be marked.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Andi Shyti <andi@etezian.org>
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
---
 drivers/spi/spi-s3c64xx.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 302c1d4a28b1..0c917cf891ca 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -59,6 +59,7 @@
 #define S3C64XX_SPI_MODE_BUS_TSZ_HALFWORD	(1<<17)
 #define S3C64XX_SPI_MODE_BUS_TSZ_WORD		(2<<17)
 #define S3C64XX_SPI_MODE_BUS_TSZ_MASK		(3<<17)
+#define S3C64XX_SPI_MODE_SELF_LOOPBACK		(1<<3)
 #define S3C64XX_SPI_MODE_RXDMA_ON		(1<<2)
 #define S3C64XX_SPI_MODE_TXDMA_ON		(1<<1)
 #define S3C64XX_SPI_MODE_4BURST			(1<<0)
@@ -135,6 +136,7 @@ struct s3c64xx_spi_dma_data {
  * @clk_from_cmu: True, if the controller does not include a clock mux and
  *	prescaler unit.
  * @clk_ioclk: True if clock is present on this device
+ * @has_loopback: True if loopback mode can be supported
  *
  * The Samsung s3c64xx SPI controller are used on various Samsung SoC's but
  * differ in some aspects such as the size of the fifo and spi bus clock
@@ -149,6 +151,7 @@ struct s3c64xx_spi_port_config {
 	bool	high_speed;
 	bool	clk_from_cmu;
 	bool	clk_ioclk;
+	bool	has_loopback;
 };
 
 /**
@@ -659,6 +662,9 @@ static int s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
 		break;
 	}
 
+	if ((sdd->cur_mode & SPI_LOOP) && sdd->port_conf->has_loopback)
+		val |= S3C64XX_SPI_MODE_SELF_LOOPBACK;
+
 	writel(val, regs + S3C64XX_SPI_MODE_CFG);
 
 	if (sdd->port_conf->clk_from_cmu) {
@@ -1148,6 +1154,8 @@ static int s3c64xx_spi_probe(struct platform_device *pdev)
 					SPI_BPW_MASK(8);
 	/* the spi->mode bits understood by this driver: */
 	master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
+	if (sdd->port_conf->has_loopback)
+		master->mode_bits |= SPI_LOOP;
 	master->auto_runtime_pm = true;
 	if (!is_polling(sdd))
 		master->can_dma = s3c64xx_spi_can_dma;
-- 
2.36.1

[PATCH v3 1/4] spi: s3c64xx: support loopback mode

[Chanho Park]

Modern exynos SoCs can support self loopback mode via setting BIT(3) of
MODE_CFG register. Previous SoCs don't have the bit so we need to add
has_loopback field in the s3c64xx_spi_port_config. Exynos Auto v9 SoC
has the bit and it will define the field to "true".
When it is set, SPI_LOOP mode will be marked.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Andi Shyti <andi@etezian.org>
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
---
 drivers/spi/spi-s3c64xx.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 302c1d4a28b1..0c917cf891ca 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -59,6 +59,7 @@
 #define S3C64XX_SPI_MODE_BUS_TSZ_HALFWORD	(1<<17)
 #define S3C64XX_SPI_MODE_BUS_TSZ_WORD		(2<<17)
 #define S3C64XX_SPI_MODE_BUS_TSZ_MASK		(3<<17)
+#define S3C64XX_SPI_MODE_SELF_LOOPBACK		(1<<3)
 #define S3C64XX_SPI_MODE_RXDMA_ON		(1<<2)
 #define S3C64XX_SPI_MODE_TXDMA_ON		(1<<1)
 #define S3C64XX_SPI_MODE_4BURST			(1<<0)
@@ -135,6 +136,7 @@ struct s3c64xx_spi_dma_data {
  * @clk_from_cmu: True, if the controller does not include a clock mux and
  *	prescaler unit.
  * @clk_ioclk: True if clock is present on this device
+ * @has_loopback: True if loopback mode can be supported
  *
  * The Samsung s3c64xx SPI controller are used on various Samsung SoC's but
  * differ in some aspects such as the size of the fifo and spi bus clock
@@ -149,6 +151,7 @@ struct s3c64xx_spi_port_config {
 	bool	high_speed;
 	bool	clk_from_cmu;
 	bool	clk_ioclk;
+	bool	has_loopback;
 };
 
 /**
@@ -659,6 +662,9 @@ static int s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
 		break;
 	}
 
+	if ((sdd->cur_mode & SPI_LOOP) && sdd->port_conf->has_loopback)
+		val |= S3C64XX_SPI_MODE_SELF_LOOPBACK;
+
 	writel(val, regs + S3C64XX_SPI_MODE_CFG);
 
 	if (sdd->port_conf->clk_from_cmu) {
@@ -1148,6 +1154,8 @@ static int s3c64xx_spi_probe(struct platform_device *pdev)
 					SPI_BPW_MASK(8);
 	/* the spi->mode bits understood by this driver: */
 	master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
+	if (sdd->port_conf->has_loopback)
+		master->mode_bits |= SPI_LOOP;
 	master->auto_runtime_pm = true;
 	if (!is_polling(sdd))
 		master->can_dma = s3c64xx_spi_can_dma;
-- 
2.36.1


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[PATCH v3 2/4] spi: s3c64xx: support custom value of internal clock divider

[Chanho Park]

Modern exynos SoCs such as Exynos Auto v9 have different internal clock
divider, for example "4". To support this internal value, this adds
clk_div of the s3c64xx_spi_port_config and assign "2" as the default
value to existing s3c64xx_spi_port_config.

Signed-off-by: Chanho Park <chanho61.park@samsung.com>
---
 drivers/spi/spi-s3c64xx.c | 28 ++++++++++++++++++++--------
 1 file changed, 20 insertions(+), 8 deletions(-)

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 0c917cf891ca..ff565e57736b 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -131,6 +131,7 @@ struct s3c64xx_spi_dma_data {
  * @fifo_lvl_mask: Bit-mask for {TX|RX}_FIFO_LVL bits in SPI_STATUS register.
  * @rx_lvl_offset: Bit offset of RX_FIFO_LVL bits in SPI_STATUS regiter.
  * @tx_st_done: Bit offset of TX_DONE bit in SPI_STATUS regiter.
+ * @clk_div: Internal clock divider
  * @quirks: Bitmask of known quirks
  * @high_speed: True, if the controller supports HIGH_SPEED_EN bit.
  * @clk_from_cmu: True, if the controller does not include a clock mux and
@@ -148,6 +149,7 @@ struct s3c64xx_spi_port_config {
 	int	rx_lvl_offset;
 	int	tx_st_done;
 	int	quirks;
+	int	clk_div;
 	bool	high_speed;
 	bool	clk_from_cmu;
 	bool	clk_ioclk;
@@ -620,6 +622,7 @@ static int s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
 	void __iomem *regs = sdd->regs;
 	int ret;
 	u32 val;
+	int div = sdd->port_conf->clk_div;
 
 	/* Disable Clock */
 	if (!sdd->port_conf->clk_from_cmu) {
@@ -668,16 +671,15 @@ static int s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
 	writel(val, regs + S3C64XX_SPI_MODE_CFG);
 
 	if (sdd->port_conf->clk_from_cmu) {
-		/* The src_clk clock is divided internally by 2 */
-		ret = clk_set_rate(sdd->src_clk, sdd->cur_speed * 2);
+		ret = clk_set_rate(sdd->src_clk, sdd->cur_speed * div);
 		if (ret)
 			return ret;
-		sdd->cur_speed = clk_get_rate(sdd->src_clk) / 2;
+		sdd->cur_speed = clk_get_rate(sdd->src_clk) / div;
 	} else {
 		/* Configure Clock */
 		val = readl(regs + S3C64XX_SPI_CLK_CFG);
 		val &= ~S3C64XX_SPI_PSR_MASK;
-		val |= ((clk_get_rate(sdd->src_clk) / sdd->cur_speed / 2 - 1)
+		val |= ((clk_get_rate(sdd->src_clk) / sdd->cur_speed / div - 1)
 				& S3C64XX_SPI_PSR_MASK);
 		writel(val, regs + S3C64XX_SPI_CLK_CFG);
 
@@ -871,6 +873,7 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
 	struct s3c64xx_spi_csinfo *cs = spi->controller_data;
 	struct s3c64xx_spi_driver_data *sdd;
 	int err;
+	int div;
 
 	sdd = spi_master_get_devdata(spi->master);
 	if (spi->dev.of_node) {
@@ -889,22 +892,24 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
 
 	pm_runtime_get_sync(&sdd->pdev->dev);
 
+	div = sdd->port_conf->clk_div;
+
 	/* Check if we can provide the requested rate */
 	if (!sdd->port_conf->clk_from_cmu) {
 		u32 psr, speed;
 
 		/* Max possible */
-		speed = clk_get_rate(sdd->src_clk) / 2 / (0 + 1);
+		speed = clk_get_rate(sdd->src_clk) / div / (0 + 1);
 
 		if (spi->max_speed_hz > speed)
 			spi->max_speed_hz = speed;
 
-		psr = clk_get_rate(sdd->src_clk) / 2 / spi->max_speed_hz - 1;
+		psr = clk_get_rate(sdd->src_clk) / div / spi->max_speed_hz - 1;
 		psr &= S3C64XX_SPI_PSR_MASK;
 		if (psr == S3C64XX_SPI_PSR_MASK)
 			psr--;
 
-		speed = clk_get_rate(sdd->src_clk) / 2 / (psr + 1);
+		speed = clk_get_rate(sdd->src_clk) / div / (psr + 1);
 		if (spi->max_speed_hz < speed) {
 			if (psr+1 < S3C64XX_SPI_PSR_MASK) {
 				psr++;
@@ -914,7 +919,7 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
 			}
 		}
 
-		speed = clk_get_rate(sdd->src_clk) / 2 / (psr + 1);
+		speed = clk_get_rate(sdd->src_clk) / div / (psr + 1);
 		if (spi->max_speed_hz >= speed) {
 			spi->max_speed_hz = speed;
 		} else {
@@ -1396,6 +1401,7 @@ static const struct s3c64xx_spi_port_config s3c2443_spi_port_config = {
 	.fifo_lvl_mask	= { 0x7f },
 	.rx_lvl_offset	= 13,
 	.tx_st_done	= 21,
+	.clk_div	= 2,
 	.high_speed	= true,
 };
 
@@ -1403,12 +1409,14 @@ static const struct s3c64xx_spi_port_config s3c6410_spi_port_config = {
 	.fifo_lvl_mask	= { 0x7f, 0x7F },
 	.rx_lvl_offset	= 13,
 	.tx_st_done	= 21,
+	.clk_div	= 2,
 };
 
 static const struct s3c64xx_spi_port_config s5pv210_spi_port_config = {
 	.fifo_lvl_mask	= { 0x1ff, 0x7F },
 	.rx_lvl_offset	= 15,
 	.tx_st_done	= 25,
+	.clk_div	= 2,
 	.high_speed	= true,
 };
 
@@ -1416,6 +1424,7 @@ static const struct s3c64xx_spi_port_config exynos4_spi_port_config = {
 	.fifo_lvl_mask	= { 0x1ff, 0x7F, 0x7F },
 	.rx_lvl_offset	= 15,
 	.tx_st_done	= 25,
+	.clk_div	= 2,
 	.high_speed	= true,
 	.clk_from_cmu	= true,
 	.quirks		= S3C64XX_SPI_QUIRK_CS_AUTO,
@@ -1425,6 +1434,7 @@ static const struct s3c64xx_spi_port_config exynos7_spi_port_config = {
 	.fifo_lvl_mask	= { 0x1ff, 0x7F, 0x7F, 0x7F, 0x7F, 0x1ff},
 	.rx_lvl_offset	= 15,
 	.tx_st_done	= 25,
+	.clk_div	= 2,
 	.high_speed	= true,
 	.clk_from_cmu	= true,
 	.quirks		= S3C64XX_SPI_QUIRK_CS_AUTO,
@@ -1434,6 +1444,7 @@ static const struct s3c64xx_spi_port_config exynos5433_spi_port_config = {
 	.fifo_lvl_mask	= { 0x1ff, 0x7f, 0x7f, 0x7f, 0x7f, 0x1ff},
 	.rx_lvl_offset	= 15,
 	.tx_st_done	= 25,
+	.clk_div	= 2,
 	.high_speed	= true,
 	.clk_from_cmu	= true,
 	.clk_ioclk	= true,
@@ -1444,6 +1455,7 @@ static const struct s3c64xx_spi_port_config fsd_spi_port_config = {
 	.fifo_lvl_mask	= { 0x7f, 0x7f, 0x7f, 0x7f, 0x7f},
 	.rx_lvl_offset	= 15,
 	.tx_st_done	= 25,
+	.clk_div	= 2,
 	.high_speed	= true,
 	.clk_from_cmu	= true,
 	.clk_ioclk	= false,
-- 
2.36.1

[PATCH v3 2/4] spi: s3c64xx: support custom value of internal clock divider

[Chanho Park]

Modern exynos SoCs such as Exynos Auto v9 have different internal clock
divider, for example "4". To support this internal value, this adds
clk_div of the s3c64xx_spi_port_config and assign "2" as the default
value to existing s3c64xx_spi_port_config.

Signed-off-by: Chanho Park <chanho61.park@samsung.com>
---
 drivers/spi/spi-s3c64xx.c | 28 ++++++++++++++++++++--------
 1 file changed, 20 insertions(+), 8 deletions(-)

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 0c917cf891ca..ff565e57736b 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -131,6 +131,7 @@ struct s3c64xx_spi_dma_data {
  * @fifo_lvl_mask: Bit-mask for {TX|RX}_FIFO_LVL bits in SPI_STATUS register.
  * @rx_lvl_offset: Bit offset of RX_FIFO_LVL bits in SPI_STATUS regiter.
  * @tx_st_done: Bit offset of TX_DONE bit in SPI_STATUS regiter.
+ * @clk_div: Internal clock divider
  * @quirks: Bitmask of known quirks
  * @high_speed: True, if the controller supports HIGH_SPEED_EN bit.
  * @clk_from_cmu: True, if the controller does not include a clock mux and
@@ -148,6 +149,7 @@ struct s3c64xx_spi_port_config {
 	int	rx_lvl_offset;
 	int	tx_st_done;
 	int	quirks;
+	int	clk_div;
 	bool	high_speed;
 	bool	clk_from_cmu;
 	bool	clk_ioclk;
@@ -620,6 +622,7 @@ static int s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
 	void __iomem *regs = sdd->regs;
 	int ret;
 	u32 val;
+	int div = sdd->port_conf->clk_div;
 
 	/* Disable Clock */
 	if (!sdd->port_conf->clk_from_cmu) {
@@ -668,16 +671,15 @@ static int s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
 	writel(val, regs + S3C64XX_SPI_MODE_CFG);
 
 	if (sdd->port_conf->clk_from_cmu) {
-		/* The src_clk clock is divided internally by 2 */
-		ret = clk_set_rate(sdd->src_clk, sdd->cur_speed * 2);
+		ret = clk_set_rate(sdd->src_clk, sdd->cur_speed * div);
 		if (ret)
 			return ret;
-		sdd->cur_speed = clk_get_rate(sdd->src_clk) / 2;
+		sdd->cur_speed = clk_get_rate(sdd->src_clk) / div;
 	} else {
 		/* Configure Clock */
 		val = readl(regs + S3C64XX_SPI_CLK_CFG);
 		val &= ~S3C64XX_SPI_PSR_MASK;
-		val |= ((clk_get_rate(sdd->src_clk) / sdd->cur_speed / 2 - 1)
+		val |= ((clk_get_rate(sdd->src_clk) / sdd->cur_speed / div - 1)
 				& S3C64XX_SPI_PSR_MASK);
 		writel(val, regs + S3C64XX_SPI_CLK_CFG);
 
@@ -871,6 +873,7 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
 	struct s3c64xx_spi_csinfo *cs = spi->controller_data;
 	struct s3c64xx_spi_driver_data *sdd;
 	int err;
+	int div;
 
 	sdd = spi_master_get_devdata(spi->master);
 	if (spi->dev.of_node) {
@@ -889,22 +892,24 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
 
 	pm_runtime_get_sync(&sdd->pdev->dev);
 
+	div = sdd->port_conf->clk_div;
+
 	/* Check if we can provide the requested rate */
 	if (!sdd->port_conf->clk_from_cmu) {
 		u32 psr, speed;
 
 		/* Max possible */
-		speed = clk_get_rate(sdd->src_clk) / 2 / (0 + 1);
+		speed = clk_get_rate(sdd->src_clk) / div / (0 + 1);
 
 		if (spi->max_speed_hz > speed)
 			spi->max_speed_hz = speed;
 
-		psr = clk_get_rate(sdd->src_clk) / 2 / spi->max_speed_hz - 1;
+		psr = clk_get_rate(sdd->src_clk) / div / spi->max_speed_hz - 1;
 		psr &= S3C64XX_SPI_PSR_MASK;
 		if (psr == S3C64XX_SPI_PSR_MASK)
 			psr--;
 
-		speed = clk_get_rate(sdd->src_clk) / 2 / (psr + 1);
+		speed = clk_get_rate(sdd->src_clk) / div / (psr + 1);
 		if (spi->max_speed_hz < speed) {
 			if (psr+1 < S3C64XX_SPI_PSR_MASK) {
 				psr++;
@@ -914,7 +919,7 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
 			}
 		}
 
-		speed = clk_get_rate(sdd->src_clk) / 2 / (psr + 1);
+		speed = clk_get_rate(sdd->src_clk) / div / (psr + 1);
 		if (spi->max_speed_hz >= speed) {
 			spi->max_speed_hz = speed;
 		} else {
@@ -1396,6 +1401,7 @@ static const struct s3c64xx_spi_port_config s3c2443_spi_port_config = {
 	.fifo_lvl_mask	= { 0x7f },
 	.rx_lvl_offset	= 13,
 	.tx_st_done	= 21,
+	.clk_div	= 2,
 	.high_speed	= true,
 };
 
@@ -1403,12 +1409,14 @@ static const struct s3c64xx_spi_port_config s3c6410_spi_port_config = {
 	.fifo_lvl_mask	= { 0x7f, 0x7F },
 	.rx_lvl_offset	= 13,
 	.tx_st_done	= 21,
+	.clk_div	= 2,
 };
 
 static const struct s3c64xx_spi_port_config s5pv210_spi_port_config = {
 	.fifo_lvl_mask	= { 0x1ff, 0x7F },
 	.rx_lvl_offset	= 15,
 	.tx_st_done	= 25,
+	.clk_div	= 2,
 	.high_speed	= true,
 };
 
@@ -1416,6 +1424,7 @@ static const struct s3c64xx_spi_port_config exynos4_spi_port_config = {
 	.fifo_lvl_mask	= { 0x1ff, 0x7F, 0x7F },
 	.rx_lvl_offset	= 15,
 	.tx_st_done	= 25,
+	.clk_div	= 2,
 	.high_speed	= true,
 	.clk_from_cmu	= true,
 	.quirks		= S3C64XX_SPI_QUIRK_CS_AUTO,
@@ -1425,6 +1434,7 @@ static const struct s3c64xx_spi_port_config exynos7_spi_port_config = {
 	.fifo_lvl_mask	= { 0x1ff, 0x7F, 0x7F, 0x7F, 0x7F, 0x1ff},
 	.rx_lvl_offset	= 15,
 	.tx_st_done	= 25,
+	.clk_div	= 2,
 	.high_speed	= true,
 	.clk_from_cmu	= true,
 	.quirks		= S3C64XX_SPI_QUIRK_CS_AUTO,
@@ -1434,6 +1444,7 @@ static const struct s3c64xx_spi_port_config exynos5433_spi_port_config = {
 	.fifo_lvl_mask	= { 0x1ff, 0x7f, 0x7f, 0x7f, 0x7f, 0x1ff},
 	.rx_lvl_offset	= 15,
 	.tx_st_done	= 25,
+	.clk_div	= 2,
 	.high_speed	= true,
 	.clk_from_cmu	= true,
 	.clk_ioclk	= true,
@@ -1444,6 +1455,7 @@ static const struct s3c64xx_spi_port_config fsd_spi_port_config = {
 	.fifo_lvl_mask	= { 0x7f, 0x7f, 0x7f, 0x7f, 0x7f},
 	.rx_lvl_offset	= 15,
 	.tx_st_done	= 25,
+	.clk_div	= 2,
 	.high_speed	= true,
 	.clk_from_cmu	= true,
 	.clk_ioclk	= false,
-- 
2.36.1


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Re: [PATCH v3 2/4] spi: s3c64xx: support custom value of internal clock divider

[Andi Shyti]

Hi Chanho,

On Wed, Jun 29, 2022 at 07:23:02PM +0900, Chanho Park wrote:
> Modern exynos SoCs such as Exynos Auto v9 have different internal clock
> divider, for example "4". To support this internal value, this adds
> clk_div of the s3c64xx_spi_port_config and assign "2" as the default
> value to existing s3c64xx_spi_port_config.
> 
> Signed-off-by: Chanho Park <chanho61.park@samsung.com>

Reviewed-by: Andi Shyti <andi@etezian.org>

Thanks,
Andi

Re: [PATCH v3 2/4] spi: s3c64xx: support custom value of internal clock divider

[Andi Shyti]

Hi Chanho,

On Wed, Jun 29, 2022 at 07:23:02PM +0900, Chanho Park wrote:
> Modern exynos SoCs such as Exynos Auto v9 have different internal clock
> divider, for example "4". To support this internal value, this adds
> clk_div of the s3c64xx_spi_port_config and assign "2" as the default
> value to existing s3c64xx_spi_port_config.
> 
> Signed-off-by: Chanho Park <chanho61.park@samsung.com>

Reviewed-by: Andi Shyti <andi@etezian.org>

Thanks,
Andi

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Re: [PATCH v3 2/4] spi: s3c64xx: support custom value of internal clock divider

[Krzysztof Kozlowski]

On 29/06/2022 12:23, Chanho Park wrote:
> Modern exynos SoCs such as Exynos Auto v9 have different internal clock
> divider, for example "4". To support this internal value, this adds
> clk_div of the s3c64xx_spi_port_config and assign "2" as the default
> value to existing s3c64xx_spi_port_config.
> 


Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>


Best regards,
Krzysztof

Re: [PATCH v3 2/4] spi: s3c64xx: support custom value of internal clock divider

[Krzysztof Kozlowski]

On 29/06/2022 12:23, Chanho Park wrote:
> Modern exynos SoCs such as Exynos Auto v9 have different internal clock
> divider, for example "4". To support this internal value, this adds
> clk_div of the s3c64xx_spi_port_config and assign "2" as the default
> value to existing s3c64xx_spi_port_config.
> 


Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>


Best regards,
Krzysztof

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Re: [PATCH v3 2/4] spi: s3c64xx: support custom value of internal clock divider

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 652 bytes --]

On Wed, Jun 29, 2022 at 07:23:02PM +0900, Chanho Park wrote:
> Modern exynos SoCs such as Exynos Auto v9 have different internal clock
> divider, for example "4". To support this internal value, this adds
> clk_div of the s3c64xx_spi_port_config and assign "2" as the default
> value to existing s3c64xx_spi_port_config.

Please submit patches using subject lines reflecting the style for the
subsystem, this makes it easier for people to identify relevant patches.
Look at what existing commits in the area you're changing are doing and
make sure your subject lines visually resemble what they're doing.
There's no need to resubmit to fix this alone.

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

Re: [PATCH v3 2/4] spi: s3c64xx: support custom value of internal clock divider

[Mark Brown]

[-- Attachment #1.1: Type: text/plain, Size: 652 bytes --]

On Wed, Jun 29, 2022 at 07:23:02PM +0900, Chanho Park wrote:
> Modern exynos SoCs such as Exynos Auto v9 have different internal clock
> divider, for example "4". To support this internal value, this adds
> clk_div of the s3c64xx_spi_port_config and assign "2" as the default
> value to existing s3c64xx_spi_port_config.

Please submit patches using subject lines reflecting the style for the
subsystem, this makes it easier for people to identify relevant patches.
Look at what existing commits in the area you're changing are doing and
make sure your subject lines visually resemble what they're doing.
There's no need to resubmit to fix this alone.

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

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

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Re: [PATCH v3 2/4] spi: s3c64xx: support custom value of internal clock divider

[Linus Walleij]

On Wed, Jun 29, 2022 at 12:27 PM Chanho Park <chanho61.park@samsung.com> wrote:

> Modern exynos SoCs such as Exynos Auto v9 have different internal clock
> divider, for example "4". To support this internal value, this adds
> clk_div of the s3c64xx_spi_port_config and assign "2" as the default
> value to existing s3c64xx_spi_port_config.
>
> Signed-off-by: Chanho Park <chanho61.park@samsung.com>

I don't really see why this divider value should be hard-coded like this.

I guess it is some default value, that's OK I guess, then call it:

> + * @clk_div: Internal clock divider
> +       int     clk_div;

clk_div_default

And the documentation should say "clock divider to be used
by default unless a specific clock frequency is configured"

Yours,
Linus Walleij

Re: [PATCH v3 2/4] spi: s3c64xx: support custom value of internal clock divider

[Linus Walleij]

On Wed, Jun 29, 2022 at 12:27 PM Chanho Park <chanho61.park@samsung.com> wrote:

> Modern exynos SoCs such as Exynos Auto v9 have different internal clock
> divider, for example "4". To support this internal value, this adds
> clk_div of the s3c64xx_spi_port_config and assign "2" as the default
> value to existing s3c64xx_spi_port_config.
>
> Signed-off-by: Chanho Park <chanho61.park@samsung.com>

I don't really see why this divider value should be hard-coded like this.

I guess it is some default value, that's OK I guess, then call it:

> + * @clk_div: Internal clock divider
> +       int     clk_div;

clk_div_default

And the documentation should say "clock divider to be used
by default unless a specific clock frequency is configured"

Yours,
Linus Walleij

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Re: [PATCH v3 2/4] spi: s3c64xx: support custom value of internal clock divider

[Linus Walleij]

On Wed, Jun 29, 2022 at 12:27 PM Chanho Park <chanho61.park@samsung.com> wrote:

> Modern exynos SoCs such as Exynos Auto v9 have different internal clock
> divider, for example "4". To support this internal value, this adds
> clk_div of the s3c64xx_spi_port_config and assign "2" as the default
> value to existing s3c64xx_spi_port_config.
>
> Signed-off-by: Chanho Park <chanho61.park@samsung.com>

While this gives a way to set up the default clock divider (which is
fair) I think
you should probably go the extra mile and make this clock divider a proper
clock abstraction, so the driver can respect the DT standard property
spi-max-frequency
from Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml

This actually isn't very hard: look for example in the PL111 driver,
a hardware block that contains a similar internal clock divider:
drivers/gpu/drm/pl111/pl111_display.c
check how we define a clock from pl111_clk_div_ops.
in pl111_init_clock_divider().

Then the driver probe() just grabs that clock and sets the frequency.
The algorithms should be pretty much copy/paste.

Yours,
Linus Walleij

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Re: [PATCH v3 2/4] spi: s3c64xx: support custom value of internal clock divider

[Linus Walleij]

On Wed, Jun 29, 2022 at 12:27 PM Chanho Park <chanho61.park@samsung.com> wrote:

> Modern exynos SoCs such as Exynos Auto v9 have different internal clock
> divider, for example "4". To support this internal value, this adds
> clk_div of the s3c64xx_spi_port_config and assign "2" as the default
> value to existing s3c64xx_spi_port_config.
>
> Signed-off-by: Chanho Park <chanho61.park@samsung.com>

While this gives a way to set up the default clock divider (which is
fair) I think
you should probably go the extra mile and make this clock divider a proper
clock abstraction, so the driver can respect the DT standard property
spi-max-frequency
from Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml

This actually isn't very hard: look for example in the PL111 driver,
a hardware block that contains a similar internal clock divider:
drivers/gpu/drm/pl111/pl111_display.c
check how we define a clock from pl111_clk_div_ops.
in pl111_init_clock_divider().

Then the driver probe() just grabs that clock and sets the frequency.
The algorithms should be pretty much copy/paste.

Yours,
Linus Walleij

RE: [PATCH v3 2/4] spi: s3c64xx: support custom value of internal clock divider

[Chanho Park]

> > Modern exynos SoCs such as Exynos Auto v9 have different internal
> > clock divider, for example "4". To support this internal value, this
> > adds clk_div of the s3c64xx_spi_port_config and assign "2" as the
> > default value to existing s3c64xx_spi_port_config.
> >
> > Signed-off-by: Chanho Park <chanho61.park@samsung.com>
> 
> While this gives a way to set up the default clock divider (which is
> fair) I think
> you should probably go the extra mile and make this clock divider a proper
> clock abstraction, so the driver can respect the DT standard property spi-
> max-frequency from Documentation/devicetree/bindings/spi/spi-peripheral-
> props.yaml
> 
> This actually isn't very hard: look for example in the PL111 driver, a
> hardware block that contains a similar internal clock divider:
> drivers/gpu/drm/pl111/pl111_display.c
> check how we define a clock from pl111_clk_div_ops.
> in pl111_init_clock_divider().
> 
> Then the driver probe() just grabs that clock and sets the frequency.
> The algorithms should be pretty much copy/paste.

Thanks for the suggestion. I'll look into it.

Best Regards,
Chanho Park

RE: [PATCH v3 2/4] spi: s3c64xx: support custom value of internal clock divider

[Chanho Park]

> > Modern exynos SoCs such as Exynos Auto v9 have different internal
> > clock divider, for example "4". To support this internal value, this
> > adds clk_div of the s3c64xx_spi_port_config and assign "2" as the
> > default value to existing s3c64xx_spi_port_config.
> >
> > Signed-off-by: Chanho Park <chanho61.park@samsung.com>
> 
> While this gives a way to set up the default clock divider (which is
> fair) I think
> you should probably go the extra mile and make this clock divider a proper
> clock abstraction, so the driver can respect the DT standard property spi-
> max-frequency from Documentation/devicetree/bindings/spi/spi-peripheral-
> props.yaml
> 
> This actually isn't very hard: look for example in the PL111 driver, a
> hardware block that contains a similar internal clock divider:
> drivers/gpu/drm/pl111/pl111_display.c
> check how we define a clock from pl111_clk_div_ops.
> in pl111_init_clock_divider().
> 
> Then the driver probe() just grabs that clock and sets the frequency.
> The algorithms should be pretty much copy/paste.

Thanks for the suggestion. I'll look into it.

Best Regards,
Chanho Park


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[PATCH v3 3/4] dt-bindings: samsung,spi: define exynosautov9 compatible

[Chanho Park]

Define "samsung,exynosautov9-spi" for Exynos Auto v9's spi.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Andi Shyti <andi@etezian.org>
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
---
 Documentation/devicetree/bindings/spi/samsung,spi.yaml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/spi/samsung,spi.yaml b/Documentation/devicetree/bindings/spi/samsung,spi.yaml
index ef59ff62e88d..e0a465d70b0a 100644
--- a/Documentation/devicetree/bindings/spi/samsung,spi.yaml
+++ b/Documentation/devicetree/bindings/spi/samsung,spi.yaml
@@ -22,6 +22,7 @@ properties:
           - samsung,s5pv210-spi # for S5PV210 and S5PC110
           - samsung,exynos4210-spi
           - samsung,exynos5433-spi
+          - samsung,exynosautov9-spi
           - tesla,fsd-spi
       - const: samsung,exynos7-spi
         deprecated: true
@@ -86,7 +87,9 @@ allOf:
       properties:
         compatible:
           contains:
-            const: samsung,exynos5433-spi
+            enum:
+              - samsung,exynos5433-spi
+              - samsung,exynosautov9-spi
     then:
       properties:
         clocks:
-- 
2.36.1

[PATCH v3 3/4] dt-bindings: samsung,spi: define exynosautov9 compatible

[Chanho Park]

Define "samsung,exynosautov9-spi" for Exynos Auto v9's spi.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Andi Shyti <andi@etezian.org>
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
---
 Documentation/devicetree/bindings/spi/samsung,spi.yaml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/spi/samsung,spi.yaml b/Documentation/devicetree/bindings/spi/samsung,spi.yaml
index ef59ff62e88d..e0a465d70b0a 100644
--- a/Documentation/devicetree/bindings/spi/samsung,spi.yaml
+++ b/Documentation/devicetree/bindings/spi/samsung,spi.yaml
@@ -22,6 +22,7 @@ properties:
           - samsung,s5pv210-spi # for S5PV210 and S5PC110
           - samsung,exynos4210-spi
           - samsung,exynos5433-spi
+          - samsung,exynosautov9-spi
           - tesla,fsd-spi
       - const: samsung,exynos7-spi
         deprecated: true
@@ -86,7 +87,9 @@ allOf:
       properties:
         compatible:
           contains:
-            const: samsung,exynos5433-spi
+            enum:
+              - samsung,exynos5433-spi
+              - samsung,exynosautov9-spi
     then:
       properties:
         clocks:
-- 
2.36.1


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[PATCH v3 4/4] spi: s3c64xx: add spi port configuration for Exynos Auto v9 SoC

[Chanho Park]

Add exynosautov9 spi port configuration. It supports up to 12 spis so
MAX_SPI_PORTS should be increased from 6 to 12.
It has DIV_4 as the default internal clock divider and an internal
loopback mode to run a loopback test.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Andi Shyti <andi@etezian.org>
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
---
 drivers/spi/spi-s3c64xx.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index ff565e57736b..7f346866614a 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -18,7 +18,7 @@
 
 #include <linux/platform_data/spi-s3c64xx.h>
 
-#define MAX_SPI_PORTS		6
+#define MAX_SPI_PORTS		12
 #define S3C64XX_SPI_QUIRK_POLL		(1 << 0)
 #define S3C64XX_SPI_QUIRK_CS_AUTO	(1 << 1)
 #define AUTOSUSPEND_TIMEOUT	2000
@@ -1451,6 +1451,19 @@ static const struct s3c64xx_spi_port_config exynos5433_spi_port_config = {
 	.quirks		= S3C64XX_SPI_QUIRK_CS_AUTO,
 };
 
+static const struct s3c64xx_spi_port_config exynosautov9_spi_port_config = {
+	.fifo_lvl_mask	= { 0x1ff, 0x1ff, 0x7f, 0x7f, 0x7f, 0x7f, 0x1ff, 0x7f,
+			    0x7f, 0x7f, 0x7f, 0x7f},
+	.rx_lvl_offset	= 15,
+	.tx_st_done	= 25,
+	.clk_div	= 4,
+	.high_speed	= true,
+	.clk_from_cmu	= true,
+	.clk_ioclk	= true,
+	.has_loopback	= true,
+	.quirks		= S3C64XX_SPI_QUIRK_CS_AUTO,
+};
+
 static const struct s3c64xx_spi_port_config fsd_spi_port_config = {
 	.fifo_lvl_mask	= { 0x7f, 0x7f, 0x7f, 0x7f, 0x7f},
 	.rx_lvl_offset	= 15,
@@ -1492,6 +1505,9 @@ static const struct of_device_id s3c64xx_spi_dt_match[] = {
 	{ .compatible = "samsung,exynos5433-spi",
 			.data = (void *)&exynos5433_spi_port_config,
 	},
+	{ .compatible = "samsung,exynosautov9-spi",
+			.data = (void *)&exynosautov9_spi_port_config,
+	},
 	{ .compatible = "tesla,fsd-spi",
 			.data = (void *)&fsd_spi_port_config,
 	},
-- 
2.36.1

[PATCH v3 4/4] spi: s3c64xx: add spi port configuration for Exynos Auto v9 SoC

[Chanho Park]

Add exynosautov9 spi port configuration. It supports up to 12 spis so
MAX_SPI_PORTS should be increased from 6 to 12.
It has DIV_4 as the default internal clock divider and an internal
loopback mode to run a loopback test.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Andi Shyti <andi@etezian.org>
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
---
 drivers/spi/spi-s3c64xx.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index ff565e57736b..7f346866614a 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -18,7 +18,7 @@
 
 #include <linux/platform_data/spi-s3c64xx.h>
 
-#define MAX_SPI_PORTS		6
+#define MAX_SPI_PORTS		12
 #define S3C64XX_SPI_QUIRK_POLL		(1 << 0)
 #define S3C64XX_SPI_QUIRK_CS_AUTO	(1 << 1)
 #define AUTOSUSPEND_TIMEOUT	2000
@@ -1451,6 +1451,19 @@ static const struct s3c64xx_spi_port_config exynos5433_spi_port_config = {
 	.quirks		= S3C64XX_SPI_QUIRK_CS_AUTO,
 };
 
+static const struct s3c64xx_spi_port_config exynosautov9_spi_port_config = {
+	.fifo_lvl_mask	= { 0x1ff, 0x1ff, 0x7f, 0x7f, 0x7f, 0x7f, 0x1ff, 0x7f,
+			    0x7f, 0x7f, 0x7f, 0x7f},
+	.rx_lvl_offset	= 15,
+	.tx_st_done	= 25,
+	.clk_div	= 4,
+	.high_speed	= true,
+	.clk_from_cmu	= true,
+	.clk_ioclk	= true,
+	.has_loopback	= true,
+	.quirks		= S3C64XX_SPI_QUIRK_CS_AUTO,
+};
+
 static const struct s3c64xx_spi_port_config fsd_spi_port_config = {
 	.fifo_lvl_mask	= { 0x7f, 0x7f, 0x7f, 0x7f, 0x7f},
 	.rx_lvl_offset	= 15,
@@ -1492,6 +1505,9 @@ static const struct of_device_id s3c64xx_spi_dt_match[] = {
 	{ .compatible = "samsung,exynos5433-spi",
 			.data = (void *)&exynos5433_spi_port_config,
 	},
+	{ .compatible = "samsung,exynosautov9-spi",
+			.data = (void *)&exynosautov9_spi_port_config,
+	},
 	{ .compatible = "tesla,fsd-spi",
 			.data = (void *)&fsd_spi_port_config,
 	},
-- 
2.36.1


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Re: [PATCH v3 0/4] spi support for Exynos Auto v9 SoC

[Mark Brown]

On Wed, 29 Jun 2022 19:23:00 +0900, Chanho Park wrote:
> Add to support Exynos Auto v9 SoC's spi. By supporting USI(Universal
> Serial Interface) mode, the SoC can support up to 12 spi ports. Thus, we
> need to increase MAX_SPI_PORTS from 6 to 12. The spi of the SoC can
> support loopback mode unlike previous exynos SoCs. To separate the
> feature, we need to add .has_loopback to the s3c64xx_spi_port_config.
> Furthermore, it uses 4 as the default internal clock divider. We also
> need to clk_div field of the structure and assign "2" as the default
> value to the existing SoC's port config.
> Device tree definitions of exynosautov9-spi will be added in separated
> patchset to include usi(i2c/uart/spi) nodes all together.
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next

Thanks!

[1/4] spi: s3c64xx: support loopback mode
      commit: ffb7bcd3b27e86fa7bdbabf4488060064ec9d00d
[2/4] spi: s3c64xx: support custom value of internal clock divider
      commit: bfcd27dcb7b93bd1f3b89d03d8b90207876d635f
[3/4] dt-bindings: samsung,spi: define exynosautov9 compatible
      commit: 9dbeef8ad5f8e7d2cab7b888853b4abe9db87ffd
[4/4] spi: s3c64xx: add spi port configuration for Exynos Auto v9 SoC
      commit: 11d50d853dceb2df8d28bf772d3e928c1c5b137a

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

Re: [PATCH v3 0/4] spi support for Exynos Auto v9 SoC

[Mark Brown]

On Wed, 29 Jun 2022 19:23:00 +0900, Chanho Park wrote:
> Add to support Exynos Auto v9 SoC's spi. By supporting USI(Universal
> Serial Interface) mode, the SoC can support up to 12 spi ports. Thus, we
> need to increase MAX_SPI_PORTS from 6 to 12. The spi of the SoC can
> support loopback mode unlike previous exynos SoCs. To separate the
> feature, we need to add .has_loopback to the s3c64xx_spi_port_config.
> Furthermore, it uses 4 as the default internal clock divider. We also
> need to clk_div field of the structure and assign "2" as the default
> value to the existing SoC's port config.
> Device tree definitions of exynosautov9-spi will be added in separated
> patchset to include usi(i2c/uart/spi) nodes all together.
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next

Thanks!

[1/4] spi: s3c64xx: support loopback mode
      commit: ffb7bcd3b27e86fa7bdbabf4488060064ec9d00d
[2/4] spi: s3c64xx: support custom value of internal clock divider
      commit: bfcd27dcb7b93bd1f3b89d03d8b90207876d635f
[3/4] dt-bindings: samsung,spi: define exynosautov9 compatible
      commit: 9dbeef8ad5f8e7d2cab7b888853b4abe9db87ffd
[4/4] spi: s3c64xx: add spi port configuration for Exynos Auto v9 SoC
      commit: 11d50d853dceb2df8d28bf772d3e928c1c5b137a

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel