From: Simon Horman <horms@verge.net.au>
To: Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: linux-mmc@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
Ulf Hansson <ulf.hansson@linaro.org>
Subject: Re: [RFC 3/3] mmc: tmio: discard obsolete SDIO irqs before enabling irqs
Date: Tue, 10 Jan 2017 09:09:19 +0100 [thread overview]
Message-ID: <20170110080919.GE25239@verge.net.au> (raw)
In-Reply-To: <20170105114326.12426-4-wsa+renesas@sang-engineering.com>
On Thu, Jan 05, 2017 at 12:43:26PM +0100, Wolfram Sang wrote:
> Before enabling SDIO irqs, clear the status bit, so we discard old and
> stale interrupts. Needed to get two wireless cards working.
>
> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> ---
> drivers/mmc/host/tmio_mmc_pio.c | 11 ++++++++++-
> 1 file changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
> index d6033620a45c12..ebe3e12f0083dd 100644
> --- a/drivers/mmc/host/tmio_mmc_pio.c
> +++ b/drivers/mmc/host/tmio_mmc_pio.c
> @@ -134,12 +134,21 @@ static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
> struct tmio_mmc_host *host = mmc_priv(mmc);
>
> if (enable && !host->sdio_irq_enabled) {
> + u16 sdio_status;
> +
> /* Keep device active while SDIO irq is enabled */
> pm_runtime_get_sync(mmc_dev(mmc));
> - host->sdio_irq_enabled = true;
>
> + host->sdio_irq_enabled = true;
> host->sdio_irq_mask = TMIO_SDIO_MASK_ALL &
> ~TMIO_SDIO_STAT_IOIRQ;
> +
> + /* Clear obsolete interrupts before enabling */
> + sdio_status = sd_ctrl_read16(host, CTL_SDIO_STATUS) & ~TMIO_SDIO_MASK_ALL;
> + if (host->pdata->flags & TMIO_MMC_SDIO_STATUS_SETBITS)
> + sdio_status |= 6;
Perhaps a #define would be an improvement over "6".
> + sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status);
> +
> sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
> } else if (!enable && host->sdio_irq_enabled) {
> host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
> --
> 2.11.0
>
next prev parent reply other threads:[~2017-01-10 8:09 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-05 11:43 [RFC 0/3] mmc: host: tmio: sdio irq improvements Wolfram Sang
2017-01-05 11:43 ` [RFC 1/3] mmc: host: tmio: refactor calls to sdio irq Wolfram Sang
2017-01-10 8:05 ` Simon Horman
2017-01-05 11:43 ` [RFC 2/3] mmc: host: tmio: SDIO_STATUS_QUIRK is rather SDIO_STATUS_SETBITS Wolfram Sang
2017-01-10 8:07 ` Simon Horman
2017-01-19 19:40 ` Wolfram Sang
2017-01-05 11:43 ` [RFC 3/3] mmc: tmio: discard obsolete SDIO irqs before enabling irqs Wolfram Sang
2017-01-10 8:09 ` Simon Horman [this message]
2017-01-19 19:42 ` Wolfram Sang
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