[v2,17/19] spi: dw: Add DMA support to the DW SPI MMIO driver

Commit Message

Serge Semin May 15, 2020, 10:47 a.m. UTC

Since the common code in the spi-dw-dma.c driver is ready to be used
by the MMIO driver and now provides a method to generically (on any
DT or ACPI-based platforms) retrieve the Tx/Rx DMA channel handlers,
we can use it and a set of the common DW SPI DMA callbacks to enable
DMA at least for generic "snps,dw-apb-ssi" and "snps,dwc-ssi-1.01a"
devices.

Co-developed-by: Georgy Vlasov <[e-mail]>
Signed-off-by: Georgy Vlasov <[e-mail]>
Co-developed-by: Ramil Zaripov <[e-mail]>
Signed-off-by: Ramil Zaripov <[e-mail]>
Signed-off-by: Serge Semin <[e-mail]>
Cc: Alexey Malahov <[e-mail]>
Cc: Thomas Bogendoerfer <[e-mail]>
Cc: Paul Burton <[e-mail]>
Cc: Ralf Baechle <[e-mail]>
Cc: Arnd Bergmann <[e-mail]>
Cc: Allison Randal <[e-mail]>
Cc: Andy Shevchenko <[e-mail]>
Cc: Gareth Williams <[e-mail]>
Cc: Rob Herring <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
---
 drivers/spi/spi-dw-mmio.c | 4 ++++
 1 file changed, 4 insertions(+)

Comments

Andy Shevchenko May 15, 2020, 3:08 p.m. UTC | #1

On Fri, May 15, 2020 at 01:47:56PM +0300, Serge Semin wrote:
> Since the common code in the spi-dw-dma.c driver is ready to be used
> by the MMIO driver and now provides a method to generically (on any
> DT or ACPI-based platforms) retrieve the Tx/Rx DMA channel handlers,
> we can use it and a set of the common DW SPI DMA callbacks to enable
> DMA at least for generic "snps,dw-apb-ssi" and "snps,dwc-ssi-1.01a"
> devices.

Reviewed-by: Andy Shevchenko <[e-mail]>

> 
> Co-developed-by: Georgy Vlasov <[e-mail]>
> Signed-off-by: Georgy Vlasov <[e-mail]>
> Co-developed-by: Ramil Zaripov <[e-mail]>
> Signed-off-by: Ramil Zaripov <[e-mail]>
> Signed-off-by: Serge Semin <[e-mail]>
> Cc: Alexey Malahov <[e-mail]>
> Cc: Thomas Bogendoerfer <[e-mail]>
> Cc: Paul Burton <[e-mail]>
> Cc: Ralf Baechle <[e-mail]>
> Cc: Arnd Bergmann <[e-mail]>
> Cc: Allison Randal <[e-mail]>
> Cc: Andy Shevchenko <[e-mail]>
> Cc: Gareth Williams <[e-mail]>
> Cc: Rob Herring <[e-mail]>
> Cc: [e-mail]
> Cc: [e-mail]
> ---
>  drivers/spi/spi-dw-mmio.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c
> index 0894b4c09496..e23d0c53a664 100644
> --- a/drivers/spi/spi-dw-mmio.c
> +++ b/drivers/spi/spi-dw-mmio.c
> @@ -149,6 +149,8 @@ static int dw_spi_dw_apb_init(struct platform_device *pdev,
>  	/* Register hook to configure CTRLR0 */
>  	dwsmmio->dws.update_cr0 = dw_spi_update_cr0;
>  
> +	dw_spi_dma_setup_generic(&dwsmmio->dws);
> +
>  	return 0;
>  }
>  
> @@ -158,6 +160,8 @@ static int dw_spi_dwc_ssi_init(struct platform_device *pdev,
>  	/* Register hook to configure CTRLR0 */
>  	dwsmmio->dws.update_cr0 = dw_spi_update_cr0_v1_01a;
>  
> +	dw_spi_dma_setup_generic(&dwsmmio->dws);
> +
>  	return 0;
>  }
>  
> -- 
> 2.25.1
>

Patch

diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c
index 0894b4c09496..e23d0c53a664 100644
--- a/drivers/spi/spi-dw-mmio.c
+++ b/drivers/spi/spi-dw-mmio.c
@@ -149,6 +149,8 @@  static int dw_spi_dw_apb_init(struct platform_device *pdev,
 	/* Register hook to configure CTRLR0 */
 	dwsmmio->dws.update_cr0 = dw_spi_update_cr0;
 
+	dw_spi_dma_setup_generic(&dwsmmio->dws);
+
 	return 0;
 }
 
@@ -158,6 +160,8 @@  static int dw_spi_dwc_ssi_init(struct platform_device *pdev,
 	/* Register hook to configure CTRLR0 */
 	dwsmmio->dws.update_cr0 = dw_spi_update_cr0_v1_01a;
 
+	dw_spi_dma_setup_generic(&dwsmmio->dws);
+
 	return 0;
 }