From: Philipp Zabel <p.zabel@pengutronix.de>
To: Brad Larson <blarson@amd.com>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org,
linux-spi@vger.kernel.org, adrian.hunter@intel.com,
alcooperx@gmail.com, andy.shevchenko@gmail.com, arnd@arndb.de,
brad@pensando.io, brendan.higgins@linux.dev,
briannorris@chromium.org, brijeshkumar.singh@amd.com,
catalin.marinas@arm.com, davidgow@google.com, gsomlo@gmail.com,
gerg@linux-m68k.org, krzk@kernel.org,
krzysztof.kozlowski+dt@linaro.org, lee@kernel.org,
lee.jones@linaro.org, broonie@kernel.org,
yamada.masahiro@socionext.com, piotrs@cadence.com,
p.yadav@ti.com, rdunlap@infradead.org, robh+dt@kernel.org,
samuel@sholland.org, fancer.lancer@gmail.com,
skhan@linuxfoundation.org, suravee.suthikulpanit@amd.com,
thomas.lendacky@amd.com, tonyhuang.sunplus@gmail.com,
ulf.hansson@linaro.org, vaishnav.a@ti.com, will@kernel.org,
devicetree@vger.kernel.org
Subject: Re: [PATCH v9 14/15] mmc: sdhci-cadence: Support mmc hardware reset
Date: Thu, 19 Jan 2023 10:34:50 +0100 [thread overview]
Message-ID: <20230119093450.GA14049@pengutronix.de> (raw)
In-Reply-To: <20230119035136.21603-15-blarson@amd.com>
Hi Brad,
On Wed, Jan 18, 2023 at 07:51:35PM -0800, Brad Larson wrote:
> Add support for mmc hardware reset using a reset-controller
> that would need to be enabled in the device tree with
> a supporting driver. The default is disabled for all
> existing designs.
>
> Signed-off-by: Brad Larson <blarson@amd.com>
> ---
>
> Changes since v6:
> - Previously patch 17/17
> - Changed delay after reset_control_assert() from 9 to 3 usec
> - Renamed sdhci_mmc_hw_reset() to sdhci_cdns_mmc_hw_reset()
>
> ---
> drivers/mmc/host/sdhci-cadence.c | 31 +++++++++++++++++++++++++++++++
> 1 file changed, 31 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-cadence.c b/drivers/mmc/host/sdhci-cadence.c
> index e92aa79a8be2..62321cef41db 100644
> --- a/drivers/mmc/host/sdhci-cadence.c
> +++ b/drivers/mmc/host/sdhci-cadence.c
> @@ -12,6 +12,7 @@
[...]
> static int sdhci_cdns_probe(struct platform_device *pdev)
> {
> struct sdhci_host *host;
> @@ -521,6 +541,17 @@ static int sdhci_cdns_probe(struct platform_device *pdev)
> if (ret)
> goto free;
>
> + if (host->mmc->caps & MMC_CAP_HW_RESET) {
> + priv->rst_hw = devm_reset_control_get_optional_exclusive(dev, "hw");
> + if (IS_ERR(priv->rst_hw)) {
> + ret = PTR_ERR(priv->rst_hw);
> + if (ret == -ENOENT)
> + priv->rst_hw = NULL;
The optional reset_control_get variants return NULL instead of -ENOENT
if no reset is specified.
This should return on any error instead.
> + } else {
> + host->mmc_host_ops.card_hw_reset = sdhci_cdns_mmc_hw_reset;
This probably shouldn't be set if reset_control_get_optional returned NULL.
> + }
> + }
> +
> ret = sdhci_add_host(host);
regards
Philipp
next prev parent reply other threads:[~2023-01-19 9:35 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-19 3:51 [PATCH v9 00/15] Support AMD Pensando Elba SoC Brad Larson
2023-01-19 3:51 ` [PATCH v9 01/15] dt-bindings: arm: add AMD Pensando boards Brad Larson
2023-01-19 3:51 ` [PATCH v9 02/15] dt-bindings: mmc: cdns: Add AMD Pensando Elba SoC Brad Larson
2023-01-19 7:47 ` Krzysztof Kozlowski
2023-01-21 1:10 ` Brad Larson
2023-01-21 18:57 ` Krzysztof Kozlowski
2023-01-19 7:48 ` Krzysztof Kozlowski
2023-01-19 3:51 ` [PATCH v9 03/15] dt-bindings: spi: cdns: Add compatible for " Brad Larson
2023-01-19 7:53 ` Krzysztof Kozlowski
2023-01-24 1:16 ` Brad Larson
2023-01-19 3:51 ` [PATCH v9 04/15] dt-bindings: spi: dw: Add AMD Pensando Elba SoC SPI Controller bindings Brad Larson
2023-01-19 7:55 ` Krzysztof Kozlowski
2023-01-24 1:57 ` Brad Larson
2023-01-24 7:22 ` Krzysztof Kozlowski
2023-01-24 21:26 ` Brad Larson
2023-01-19 3:51 ` [PATCH v9 05/15] dt-bindings: mfd: syscon: Add amd,pensando-elba-syscon compatible Brad Larson
2023-01-19 14:19 ` Lee Jones
2023-01-19 3:51 ` [PATCH v9 06/15] dt-bindings: mfd: amd,pensando-elbasr: Add AMD Pensando System Resource chip Brad Larson
2023-01-19 7:58 ` Krzysztof Kozlowski
2023-01-26 2:59 ` Brad Larson
2023-01-19 14:17 ` Lee Jones
2023-01-19 3:51 ` [PATCH v9 07/15] MAINTAINERS: Add entry for AMD PENSANDO Brad Larson
2023-01-19 3:51 ` [PATCH v9 08/15] arm64: Add config for AMD Pensando SoC platforms Brad Larson
2023-01-19 3:51 ` [PATCH v9 09/15] arm64: dts: Add AMD Pensando Elba SoC support Brad Larson
2023-01-19 3:51 ` [PATCH v9 10/15] spi: cadence-quadspi: Add compatible for AMD Pensando Elba SoC Brad Larson
2023-01-19 3:51 ` [PATCH v9 11/15] spi: dw: Add support " Brad Larson
2023-01-19 9:58 ` Andy Shevchenko
2023-01-24 2:59 ` Brad Larson
2023-01-19 3:51 ` [PATCH v9 12/15] mmc: sdhci-cadence: Enable device specific override of writel() Brad Larson
2023-01-19 3:51 ` [PATCH v9 13/15] mmc: sdhci-cadence: Add AMD Pensando Elba SoC support Brad Larson
2023-02-02 9:43 ` Adrian Hunter
2023-01-19 3:51 ` [PATCH v9 14/15] mmc: sdhci-cadence: Support mmc hardware reset Brad Larson
2023-01-19 9:34 ` Philipp Zabel [this message]
2023-02-07 20:53 ` Brad Larson
2023-01-19 3:51 ` [PATCH v9 15/15] spi: pensando-sr: Add AMD Pensando SoC System Resource Brad Larson
2023-01-19 13:57 ` Mark Brown
2023-02-07 2:12 ` Brad Larson
2023-01-19 12:57 ` [PATCH v9 00/15] Support AMD Pensando Elba SoC Mark Brown
2023-01-24 3:21 ` Brad Larson
-- strict thread matches above, loose matches on Subject: below --
2023-01-19 3:39 Brad Larson
2023-01-19 3:39 ` [PATCH v9 14/15] mmc: sdhci-cadence: Support mmc hardware reset Brad Larson
2023-01-19 8:57 ` Arnd Bergmann
2023-02-07 1:51 ` Brad Larson
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