From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: tthayer@opensource.altera.com
Cc: Mark Brown <broonie@kernel.org>,
Grant Likely <grant.likely@linaro.org>,
Jiri Kosina <jkosina@suse.cz>, Pawel Moll <pawel.moll@arm.com>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
ijc+devicetree@hellion.org.uk, dinguyen@opensource.altera.com,
Linux Documentation List <linux-doc@vger.kernel.org>,
linux-spi@vger.kernel.org, devicetree@vger.kernel.org,
tthayer.linux@gmail.com, Axel Lin <axel.lin@ingics.com>,
baruch@tkos.co.il,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Jingoo Han <jg1.han@samsung.com>,
Kumar Gala <galak@codeaurora.org>,
Andy Shevchenko <andriy.shevchenko@intel.com>
Subject: Re: [RFC/PATCHv2 1/3] spi: dw-spi: Single Register read to clear IRQs
Date: Sat, 7 Mar 2015 21:46:32 +0200 [thread overview]
Message-ID: <CAHp75Vedevi1E9UHLMT7iOGPY9VB=twmH_JPWGfYC8-tJsMStg@mail.gmail.com> (raw)
In-Reply-To: <1425685594-26595-2-git-send-email-tthayer@opensource.altera.com>
On Sat, Mar 7, 2015 at 1:46 AM, <tthayer@opensource.altera.com> wrote:
> From: Thor Thayer <tthayer@opensource.altera.com>
>
> Instead of clearing the RxU, RxO, and TxO IRQs individually with
> 3 register reads, a single read of the ICR register will do the
> same thing.
>
> Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Rather Suggested-by: …
Otherwise,
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> ---
> drivers/spi/spi-dw.c | 4 +---
> 1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c
> index 950bc50..c5fa2be 100644
> --- a/drivers/spi/spi-dw.c
> +++ b/drivers/spi/spi-dw.c
> @@ -258,9 +258,7 @@ static irqreturn_t interrupt_transfer(struct dw_spi *dws)
>
> /* Error handling */
> if (irq_status & (SPI_INT_TXOI | SPI_INT_RXOI | SPI_INT_RXUI)) {
> - dw_readw(dws, DW_SPI_TXOICR);
> - dw_readw(dws, DW_SPI_RXOICR);
> - dw_readw(dws, DW_SPI_RXUICR);
> + dw_readw(dws, DW_SPI_ICR);
> int_error_stop(dws, "interrupt_transfer: fifo overrun/underrun");
> return IRQ_HANDLED;
> }
> --
> 1.7.9.5
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-spi" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2015-03-07 19:46 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-06 23:46 [RFC/PATCHv2 0/3] spi: spi-dw: Select 16b or 32b register access tthayer-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx
[not found] ` <1425685594-26595-1-git-send-email-tthayer-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>
2015-03-06 23:46 ` [RFC/PATCHv2 1/3] spi: dw-spi: Single Register read to clear IRQs tthayer-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx
2015-03-07 19:46 ` Andy Shevchenko [this message]
2015-03-09 18:43 ` Mark Brown
2015-03-06 23:46 ` [RFC/PATCHv2 2/3] dt-binding: spi: spi-dw: Select 16b or 32b access for Designware SPI tthayer-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx
2015-03-07 19:58 ` Andy Shevchenko
2015-03-09 18:11 ` Thor Thayer
[not found] ` <54FDE250.3050705-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>
2015-03-09 18:19 ` Mark Brown
[not found] ` <20150309181936.GU28806-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2015-03-09 18:25 ` Thor Thayer
2015-03-06 23:46 ` [RFC/PATCHv2 3/3] spi: dw-spi: Pointers select 16b vs. 32b DesignWare access tthayer-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx
[not found] ` <1425685594-26595-4-git-send-email-tthayer-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>
2015-03-07 19:52 ` Andy Shevchenko
2015-03-09 18:01 ` Thor Thayer
[not found] ` <54FDDFE6.8010109-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>
2015-03-09 18:54 ` Andy Shevchenko
[not found] ` <CAHp75Vf6dgobzZyJxu8eiqGgC7FRrwLCmyMf5Agk6S3jHDj4bw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-03-09 19:47 ` Thor Thayer
2015-03-09 20:02 ` Andy Shevchenko
[not found] ` <CAHp75VcmNOaiyRNLFzQT7nKS6piZzpYSoS785J86rKtNXx6KNg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-03-10 20:34 ` Thor Thayer
2015-03-10 20:40 ` Mark Brown
[not found] ` <54FF556A.3020408-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>
2015-03-10 20:44 ` Andy Shevchenko
2015-03-10 22:22 ` Thor Thayer
[not found] ` <54FF6E91.1010704-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>
2015-03-11 10:27 ` Andy Shevchenko
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