From: Alain Volmat <alain.volmat@foss.st.com>
To: <broonie@kernel.org>, <amelie.delaunay@foss.st.com>
Cc: <mcoquelin.stm32@gmail.com>, <alexandre.torgue@foss.st.com>,
<linux-spi@vger.kernel.org>,
<linux-stm32@st-md-mailman.stormreply.com>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <fabrice.gasnier@foss.st.com>,
<alain.volmat@foss.st.com>
Subject: [PATCH v2 5/8] spi: stm32: driver uses reset controller only at init
Date: Fri, 5 Feb 2021 19:59:29 +0100 [thread overview]
Message-ID: <1612551572-495-6-git-send-email-alain.volmat@foss.st.com> (raw)
In-Reply-To: <1612551572-495-1-git-send-email-alain.volmat@foss.st.com>
From: Etienne Carriere <etienne.carriere@st.com>
Remove reset controller device reference from the device private
structure since it is used only at probe time and can be discarded
once used to reset the SPI device.
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
---
v2: reordered within the serie
drivers/spi/spi-stm32.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c
index 8e4db219b95d..561234829110 100644
--- a/drivers/spi/spi-stm32.c
+++ b/drivers/spi/spi-stm32.c
@@ -263,7 +263,6 @@ struct stm32_spi_cfg {
* @base: virtual memory area
* @clk: hw kernel clock feeding the SPI clock generator
* @clk_rate: rate of the hw kernel clock feeding the SPI clock generator
- * @rst: SPI controller reset line
* @lock: prevent I/O concurrent access
* @irq: SPI controller interrupt line
* @fifo_size: size of the embedded fifo in bytes
@@ -289,7 +288,6 @@ struct stm32_spi {
void __iomem *base;
struct clk *clk;
u32 clk_rate;
- struct reset_control *rst;
spinlock_t lock; /* prevent I/O concurrent access */
int irq;
unsigned int fifo_size;
@@ -1811,6 +1809,7 @@ static int stm32_spi_probe(struct platform_device *pdev)
struct spi_master *master;
struct stm32_spi *spi;
struct resource *res;
+ struct reset_control *rst;
int ret;
master = spi_alloc_master(&pdev->dev, sizeof(struct stm32_spi));
@@ -1872,11 +1871,11 @@ static int stm32_spi_probe(struct platform_device *pdev)
goto err_clk_disable;
}
- spi->rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
- if (!IS_ERR(spi->rst)) {
- reset_control_assert(spi->rst);
+ rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
+ if (!IS_ERR(rst)) {
+ reset_control_assert(rst);
udelay(2);
- reset_control_deassert(spi->rst);
+ reset_control_deassert(rst);
}
if (spi->cfg->has_fifo)
--
2.17.1
next prev parent reply other threads:[~2021-02-05 19:08 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-05 18:59 [PATCH v2 0/8] spi: stm32: fix and enhancements for spi-stm32 Alain Volmat
2021-02-05 18:59 ` [PATCH v2 1/8] spi: stm32: properly handle 0 byte transfer Alain Volmat
2021-02-05 18:59 ` [PATCH v2 2/8] spi: stm32: do not mandate cs_gpio Alain Volmat
2021-02-05 18:59 ` [PATCH v2 3/8] spi: stm32: use bitfield macros Alain Volmat
2021-02-05 18:59 ` [PATCH v2 4/8] spi: stm32h7: ensure message are smaller than max size Alain Volmat
2021-02-05 18:59 ` Alain Volmat [this message]
2021-02-05 18:59 ` [PATCH v2 6/8] spi: stm32: defer probe for reset Alain Volmat
2021-02-05 18:59 ` [PATCH v2 7/8] spi: stm32h7: replace private SPI_1HZ_NS with NSEC_PER_SEC Alain Volmat
2021-02-05 18:59 ` [PATCH v2 8/8] spi: stm32: make spurious and overrun interrupts visible Alain Volmat
2021-02-05 20:16 ` [PATCH v2 0/8] spi: stm32: fix and enhancements for spi-stm32 Mark Brown
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