diff mbox series

[4/4] spi: s3c64xx: add support for google,gs101-spi

Message ID 20240206085238.1208256-5-tudor.ambarus@linaro.org (mailing list archive)
State New, archived
Headers show
Series spi: s3c64xx: add support for google,gs101-spi | expand

Commit Message

Tudor Ambarus Feb. 6, 2024, 8:52 a.m. UTC
Add support for GS101 SPI. GS101 integrates 16 SPI nodes, all with 64
bytes FIFOs. GS101 allows just 32 bit register accesses, otherwise a
Serror Interrupt is raised. Do the write reg accesses in 32 bits.

Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
---
 drivers/spi/spi-s3c64xx.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

Comments

Peter Griffin Feb. 6, 2024, 10:12 a.m. UTC | #1
Hi Tudor,

On Tue, 6 Feb 2024 at 08:52, Tudor Ambarus <tudor.ambarus@linaro.org> wrote:
>
> Add support for GS101 SPI. GS101 integrates 16 SPI nodes, all with 64
> bytes FIFOs. GS101 allows just 32 bit register accesses, otherwise a
> Serror Interrupt is raised. Do the write reg accesses in 32 bits.
>
> Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
> ---

The patch ordering seems a bit off with this series..I believe it should be
1) dt-bindings patch (docs first)
2) Add the use_32bit_io flag / functionality
3) gs101 support (this patch) that uses the use_32bit_io functionality

Peter.

>  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 cb45ad615f3d..9ad0d513fb30 100644
> --- a/drivers/spi/spi-s3c64xx.c
> +++ b/drivers/spi/spi-s3c64xx.c
> @@ -19,7 +19,7 @@
>  #include <linux/spi/spi.h>
>  #include <linux/types.h>
>
> -#define MAX_SPI_PORTS          12
> +#define MAX_SPI_PORTS          16
>  #define S3C64XX_SPI_QUIRK_CS_AUTO      (1 << 1)
>  #define AUTOSUSPEND_TIMEOUT    2000
>
> @@ -1538,6 +1538,19 @@ static const struct s3c64xx_spi_port_config fsd_spi_port_config = {
>         .quirks         = S3C64XX_SPI_QUIRK_CS_AUTO,
>  };
>
> +static const struct s3c64xx_spi_port_config gs101_spi_port_config = {
> +       .fifo_lvl_mask  = { 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
> +                           0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f},
> +       .rx_lvl_offset  = 15,
> +       .tx_st_done     = 25,
> +       .clk_div        = 4,
> +       .high_speed     = true,
> +       .clk_from_cmu   = true,
> +       .has_loopback   = true,
> +       .use_32bit_io   = true,
> +       .quirks         = S3C64XX_SPI_QUIRK_CS_AUTO,
> +};
> +
>  static const struct platform_device_id s3c64xx_spi_driver_ids[] = {
>         {
>                 .name           = "s3c2443-spi",
> @@ -1550,6 +1563,9 @@ static const struct platform_device_id s3c64xx_spi_driver_ids[] = {
>  };
>
>  static const struct of_device_id s3c64xx_spi_dt_match[] = {
> +       { .compatible = "google,gs101-spi",
> +                       .data = &gs101_spi_port_config,
> +       },
>         { .compatible = "samsung,s3c2443-spi",
>                         .data = &s3c2443_spi_port_config,
>         },
> --
> 2.43.0.594.gd9cf4e227d-goog
>
Sam Protsenko Feb. 6, 2024, 6:51 p.m. UTC | #2
On Tue, Feb 6, 2024 at 2:52 AM Tudor Ambarus <tudor.ambarus@linaro.org> wrote:
>
> Add support for GS101 SPI. GS101 integrates 16 SPI nodes, all with 64
> bytes FIFOs. GS101 allows just 32 bit register accesses, otherwise a
> Serror Interrupt is raised. Do the write reg accesses in 32 bits.
>
> Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
> ---

Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>

>  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 cb45ad615f3d..9ad0d513fb30 100644
> --- a/drivers/spi/spi-s3c64xx.c
> +++ b/drivers/spi/spi-s3c64xx.c
> @@ -19,7 +19,7 @@
>  #include <linux/spi/spi.h>
>  #include <linux/types.h>
>
> -#define MAX_SPI_PORTS          12
> +#define MAX_SPI_PORTS          16
>  #define S3C64XX_SPI_QUIRK_CS_AUTO      (1 << 1)
>  #define AUTOSUSPEND_TIMEOUT    2000
>
> @@ -1538,6 +1538,19 @@ static const struct s3c64xx_spi_port_config fsd_spi_port_config = {
>         .quirks         = S3C64XX_SPI_QUIRK_CS_AUTO,
>  };
>
> +static const struct s3c64xx_spi_port_config gs101_spi_port_config = {
> +       .fifo_lvl_mask  = { 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
> +                           0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f},
> +       .rx_lvl_offset  = 15,
> +       .tx_st_done     = 25,
> +       .clk_div        = 4,
> +       .high_speed     = true,
> +       .clk_from_cmu   = true,
> +       .has_loopback   = true,
> +       .use_32bit_io   = true,
> +       .quirks         = S3C64XX_SPI_QUIRK_CS_AUTO,
> +};
> +
>  static const struct platform_device_id s3c64xx_spi_driver_ids[] = {
>         {
>                 .name           = "s3c2443-spi",
> @@ -1550,6 +1563,9 @@ static const struct platform_device_id s3c64xx_spi_driver_ids[] = {
>  };
>
>  static const struct of_device_id s3c64xx_spi_dt_match[] = {
> +       { .compatible = "google,gs101-spi",
> +                       .data = &gs101_spi_port_config,
> +       },
>         { .compatible = "samsung,s3c2443-spi",
>                         .data = &s3c2443_spi_port_config,
>         },
> --
> 2.43.0.594.gd9cf4e227d-goog
>
diff mbox series

Patch

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index cb45ad615f3d..9ad0d513fb30 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -19,7 +19,7 @@ 
 #include <linux/spi/spi.h>
 #include <linux/types.h>
 
-#define MAX_SPI_PORTS		12
+#define MAX_SPI_PORTS		16
 #define S3C64XX_SPI_QUIRK_CS_AUTO	(1 << 1)
 #define AUTOSUSPEND_TIMEOUT	2000
 
@@ -1538,6 +1538,19 @@  static const struct s3c64xx_spi_port_config fsd_spi_port_config = {
 	.quirks		= S3C64XX_SPI_QUIRK_CS_AUTO,
 };
 
+static const struct s3c64xx_spi_port_config gs101_spi_port_config = {
+	.fifo_lvl_mask	= { 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
+			    0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f},
+	.rx_lvl_offset	= 15,
+	.tx_st_done	= 25,
+	.clk_div	= 4,
+	.high_speed	= true,
+	.clk_from_cmu	= true,
+	.has_loopback	= true,
+	.use_32bit_io	= true,
+	.quirks		= S3C64XX_SPI_QUIRK_CS_AUTO,
+};
+
 static const struct platform_device_id s3c64xx_spi_driver_ids[] = {
 	{
 		.name		= "s3c2443-spi",
@@ -1550,6 +1563,9 @@  static const struct platform_device_id s3c64xx_spi_driver_ids[] = {
 };
 
 static const struct of_device_id s3c64xx_spi_dt_match[] = {
+	{ .compatible = "google,gs101-spi",
+			.data = &gs101_spi_port_config,
+	},
 	{ .compatible = "samsung,s3c2443-spi",
 			.data = &s3c2443_spi_port_config,
 	},