linux-kernel - Re: [PATCH v2 17/19] spi: dw: Add DMA support to the DW SPI MMIO driver

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Date:   Fri, 15 May 2020 18:08:18 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc:     Mark Brown <broonie@...nel.org>,
        Serge Semin <fancer.lancer@...il.com>,
        Georgy Vlasov <Georgy.Vlasov@...kalelectronics.ru>,
        Ramil Zaripov <Ramil.Zaripov@...kalelectronics.ru>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Paul Burton <paulburton@...nel.org>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Arnd Bergmann <arnd@...db.de>,
        Allison Randal <allison@...utok.net>,
        Gareth Williams <gareth.williams.jx@...esas.com>,
        Rob Herring <robh+dt@...nel.org>, linux-mips@...r.kernel.org,
        devicetree@...r.kernel.org,
        Wan Ahmad Zainie <wan.ahmad.zainie.wan.mohamad@...el.com>,
        Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        Jay Fang <f.fangjian@...wei.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        YueHaibing <yuehaibing@...wei.com>,
        Stephen Boyd <swboyd@...omium.org>, linux-spi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 17/19] spi: dw: Add DMA support to the DW SPI MMIO
 driver

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 <andriy.shevchenko@...ux.intel.com>

> 
> Co-developed-by: Georgy Vlasov <Georgy.Vlasov@...kalelectronics.ru>
> Signed-off-by: Georgy Vlasov <Georgy.Vlasov@...kalelectronics.ru>
> Co-developed-by: Ramil Zaripov <Ramil.Zaripov@...kalelectronics.ru>
> Signed-off-by: Ramil Zaripov <Ramil.Zaripov@...kalelectronics.ru>
> Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> Cc: Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>
> Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
> Cc: Paul Burton <paulburton@...nel.org>
> Cc: Ralf Baechle <ralf@...ux-mips.org>
> Cc: Arnd Bergmann <arnd@...db.de>
> Cc: Allison Randal <allison@...utok.net>
> Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Cc: Gareth Williams <gareth.williams.jx@...esas.com>
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: linux-mips@...r.kernel.org
> Cc: devicetree@...r.kernel.org
> ---
>  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
> 

-- 
With Best Regards,
Andy Shevchenko