From: Gregory CLEMENT <gregory.clement@free-electrons.com>
To: Ulf Hansson <ulf.hansson@linaro.org>,
Adrian Hunter <adrian.hunter@intel.com>,
linux-mmc@vger.kernel.org
Cc: Jason Cooper <jason@lakedaemon.net>, Andrew Lunn <andrew@lunn.ch>,
Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
Gregory CLEMENT <gregory.clement@free-electrons.com>,
Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
linux-arm-kernel@lists.infradead.org,
Mike Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@codeaurora.org>,
linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org,
Rob Herring <robh+dt@kernel.org>,
devicetree@vger.kernel.org, Ziji Hu <huziji@marvell.com>,
Jimmy Xu <zmxu@marvell.com>, Jisheng Zhang <jszhang@marvell.com>,
Nadav Haklai <nadavh@marvell.com>, Ryan Gao <ygao@marvell.com>,
Doug Jones <dougj@marvell.com>, Victor Gu <xigu@marvell.com>,
"Wei(SOCP) Liu" <liuw@marvell.com>,
Wilson Ding <dingwei@marvell.com>,
Yehuda Yitschak <yehuday@marvell.com>,
Marcin Wojtas <mw@semihalf.com>, Hanna Hawa <hannah@marvell.com>,
Kostya Porotchkin <kostap@marvell.com>
Subject: [PATCH v6 03/14] mmc: core: Add mmc-card dt sub-node parse in core layer
Date: Tue, 14 Feb 2017 18:01:43 +0100 [thread overview]
Message-ID: <34e51d32c82b57571e061e80df3bbaed731db554.1487091464.git-series.gregory.clement@free-electrons.com> (raw)
In-Reply-To: <cover.ff78bebe0384f650a51e5e6f0f1dca6e7894b53b.1487091464.git-series.gregory.clement@free-electrons.com>
In-Reply-To: <cover.ff78bebe0384f650a51e5e6f0f1dca6e7894b53b.1487091464.git-series.gregory.clement@free-electrons.com>
From: Hu Ziji <huziji@marvell.com>
Some vendor host, like Xenon, can support multiple types.
In dts, use mmc-card dt sub-node to indicate eMMC is in use.
Add a generic mmc-card parse function in mmc core layer.
If mmc-card sub-node is detected, set eMMC common caps, such as
MMC_CAP_NONREMOVABLE, MMC_CAP2_NO_SD and MMC_CAP2_NO_SDIO.
Since it is likely that struct mmc_card is not allocated yet when
this mmc-card parse function is called, it will return true if
mmc-card sub-node is detected. Otherwise, return false.
It can help vendor host determine if the card type is eMMC.
Signed-off-by: Hu Ziji <huziji@marvell.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
---
drivers/mmc/core/mmc.c | 24 ++++++++++++++++++++++++
include/linux/mmc/core.h | 2 ++
2 files changed, 26 insertions(+)
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index b61b52f9da3d..dc480006a303 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -2111,6 +2111,30 @@ static const struct mmc_bus_ops mmc_ops = {
};
/*
+ * Parse mmc-card dt sub-node and set eMMC common caps
+ * if mmc-card exists.
+ * If mmc-card is detected, return true.
+ * Otherwise, return false.
+ */
+bool mmc_of_parse_mmc_card(struct mmc_host *host)
+{
+ struct device_node *np;
+ bool ret = false;
+
+ np = mmc_of_find_child_device(host, 0);
+ if (np && of_device_is_compatible(np, "mmc-card")) {
+ /* mmc-card sub-node indicates eMMC card is in use. */
+ host->caps |= MMC_CAP_NONREMOVABLE;
+ host->caps2 |= MMC_CAP2_NO_SDIO | MMC_CAP2_NO_SD;
+ ret = true;
+ }
+
+ of_node_put(np);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(mmc_of_parse_mmc_card);
+
+/*
* Starting point for MMC card init.
*/
int mmc_attach_mmc(struct mmc_host *host)
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index e33cc748dcfe..1b27323f3b6e 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -234,4 +234,6 @@ struct device_node;
extern u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max);
extern int mmc_of_parse_voltage(struct device_node *np, u32 *mask);
+extern bool mmc_of_parse_mmc_card(struct mmc_host *host);
+
#endif /* LINUX_MMC_CORE_H */
--
git-series 0.9.1
next prev parent reply other threads:[~2017-02-14 17:02 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-14 17:01 [PATCH v6 00/14] mmc: Add support to Marvell Xenon SD Host Controller Gregory CLEMENT
2017-02-14 17:01 ` [PATCH v6 01/14] clk: apn806: Add eMMC clock to system controller driver Gregory CLEMENT
2017-02-14 17:01 ` [PATCH v6 02/14] clk: apn806: Turn the eMMC clock as optional for dts backwards compatible Gregory CLEMENT
2017-02-14 17:01 ` Gregory CLEMENT [this message]
2017-03-15 12:43 ` [PATCH v6 03/14] mmc: core: Add mmc-card dt sub-node parse in core layer Ulf Hansson
2017-03-15 13:46 ` Ziji Hu
2017-03-22 17:11 ` Gregory CLEMENT
2017-02-14 17:01 ` [PATCH v6 04/14] mmc: sdhci: Export sdhci_set_ios() from sdhci.c Gregory CLEMENT
2017-03-22 14:48 ` Adrian Hunter
2017-02-14 17:01 ` [PATCH v6 05/14] mmc: sdhci: Export sdhci_start_signal_voltage_switch() in sdhci.c Gregory CLEMENT
2017-03-22 14:49 ` Adrian Hunter
2017-02-14 17:01 ` [PATCH v6 06/14] mmc: sdhci: Export sdhci_enable_sdio_irq() from sdhci.c Gregory CLEMENT
2017-03-22 14:49 ` Adrian Hunter
2017-02-14 17:01 ` [PATCH v6 07/14] dt: bindings: Add bindings for Marvell Xenon SD Host Controller Gregory CLEMENT
2017-02-22 21:44 ` Rob Herring
2017-03-15 12:48 ` Ulf Hansson
2017-03-23 5:32 ` [EXT] " Ziji Hu
2017-02-14 17:01 ` [PATCH v6 08/14] mmc: sdhci-xenon: Add Marvell Xenon SDHC core functionality Gregory CLEMENT
2017-03-15 13:11 ` Ulf Hansson
2017-03-15 13:58 ` Ziji Hu
2017-03-16 2:24 ` Jisheng Zhang
2017-03-22 14:32 ` Adrian Hunter
2017-02-14 17:01 ` [PATCH v6 09/14] mmc: sdhci-xenon: Add support to PHYs of Marvell Xenon SDHC Gregory CLEMENT
2017-03-15 13:39 ` Ulf Hansson
2017-03-15 14:31 ` Ziji Hu
2017-03-22 14:33 ` Adrian Hunter
2017-02-14 17:01 ` [PATCH v6 10/14] mmc: sdhci-xenon: Add SoC PHY PAD voltage control Gregory CLEMENT
2017-03-22 14:47 ` Adrian Hunter
2017-02-14 17:01 ` [PATCH v6 11/14] MAINTAINERS: add entry for Marvell Xenon MMC Host Controller drivers Gregory CLEMENT
2017-02-14 17:01 ` [PATCH v6 12/14] arm64: dts: marvell: add eMMC support for Armada 37xx Gregory CLEMENT
2017-02-14 17:01 ` [PATCH v6 13/14] arm64: dts: marvell: add sdhci support for Armada 7K/8K Gregory CLEMENT
2017-02-14 17:01 ` [PATCH v6 14/14] arm64: configs: enable SDHCI driver for Xenon Gregory CLEMENT
2017-02-20 16:59 ` [PATCH v6 00/14] mmc: Add support to Marvell Xenon SD Host Controller Gregory CLEMENT
2017-02-20 19:32 ` Ulf Hansson
2017-02-27 9:41 ` Ziji Hu
2017-03-10 10:15 ` Gregory CLEMENT
2017-02-20 17:07 ` Russell King - ARM Linux
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