From: Ludovic Barre <ludovic.Barre@st.com>
To: Ulf Hansson <ulf.hansson@linaro.org>, Rob Herring <robh+dt@kernel.org>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@st.com>,
benjamin.gaignard@linaro.org, Gerald Baeza <gerald.baeza@st.com>,
Loic Pallardy <loic.pallardy@st.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
linux-mmc@vger.kernel.org,
linux-stm32@st-md-mailman.stormreply.com,
Ludovic Barre <ludovic.barre@st.com>
Subject: [PATCH V4 21/25] mmc: mmci: add optional reset property
Date: Tue, 2 Oct 2018 14:09:23 +0200 [thread overview]
Message-ID: <1538482167-13819-22-git-send-email-ludovic.Barre@st.com> (raw)
In-Reply-To: <1538482167-13819-1-git-send-email-ludovic.Barre@st.com>
From: Ludovic Barre <ludovic.barre@st.com>
This patch adds a optional reset management.
STM32 sdmmc variant needs to reset hardware block
during the power cycle procedure (for re-initialization).
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
---
drivers/mmc/host/mmci.c | 7 +++++++
drivers/mmc/host/mmci.h | 2 ++
2 files changed, 9 insertions(+)
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 969b665..0898cc9 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -36,6 +36,7 @@
#include <linux/pm_runtime.h>
#include <linux/types.h>
#include <linux/pinctrl/consumer.h>
+#include <linux/reset.h>
#include <asm/div64.h>
#include <asm/io.h>
@@ -1877,6 +1878,12 @@ static int mmci_probe(struct amba_device *dev,
dev_dbg(mmc_dev(mmc), "clocking block at %u Hz\n", mmc->f_max);
+ host->rst = devm_reset_control_get_optional_exclusive(&dev->dev, NULL);
+ if (IS_ERR(host->rst)) {
+ ret = PTR_ERR(host->rst);
+ goto clk_disable;
+ }
+
/* Get regulators and the supported OCR mask */
ret = mmc_regulator_get_supply(mmc);
if (ret)
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index 33c243f..f793426 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -318,6 +318,8 @@ struct mmci_host {
struct clk *clk;
u8 singleirq:1;
+ struct reset_control *rst;
+
spinlock_t lock;
unsigned int mclk;
--
2.7.4
next prev parent reply other threads:[~2018-10-02 12:09 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-02 12:09 [PATCH V4 00/25] mmc: mmci: add sdmmc variant for stm32 Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 01/25] mmc: mmci: Change struct members from bool to u8 Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 02/25] mmc: mmci: create generic mmci_dma_setup Ludovic Barre
2018-10-03 9:22 ` Ulf Hansson
2018-10-03 11:44 ` Ludovic BARRE
2018-10-02 12:09 ` [PATCH V4 03/25] mmc: mmci: introduce dma_priv pointer to mmci_host Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 04/25] mmc: mmci: merge prepare data functions Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 05/25] mmc: mmci: add prepare/unprepare_data callbacks Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 06/25] mmc: mmci: add get_next_data callback Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 07/25] mmc: mmci: add dma_release callback Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 08/25] mmc: mmci: add dma_start callback Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 09/25] mmc: mmci: add dma_finalize callback Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 10/25] mmc: mmci: add dma_error callback Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 11/25] mmc: mmci: add validate_data callback Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 12/25] mmc: mmci: add set_clk/pwrreg callbacks Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 13/25] mmc: mmci: add datactrl block size variant property Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 14/25] mmc: mmci: expand startbiterr to irqmask and error check Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 15/25] mmc: mmci: add variant properties to define cpsm & cmdresp bits Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 16/25] mmc: mmci: add variant property to define dpsm bit Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 17/25] mmc: mmci: add variant property to define irq pio mask Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 18/25] mmc: mmci: add variant property to write datactrl before command Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 19/25] mmc: mmci: add variant property to not read datacnt Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 20/25] dt-bindings: mmci: add optional reset property Ludovic Barre
2018-10-02 12:09 ` Ludovic Barre [this message]
2018-10-02 12:09 ` [PATCH V4 22/25] mmc: mmci: add clock divider for stm32 sdmmc Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 23/25] mmc: mmci: add stm32 sdmmc registers Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 24/25] dt-bindings: mmci: add stm32 sdmmc variant Ludovic Barre
2018-10-02 12:09 ` [PATCH V4 25/25] mmc: " Ludovic Barre
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