From: <patrice.chotard@foss.st.com>
To: Mark Brown <broonie@kernel.org>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Vignesh Raghavendra <vigneshr@ti.com>,
Boris Brezillon <boris.brezillon@collabora.com>,
<linux-mtd@lists.infradead.org>,
Alexandre Torgue <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>
Cc: <patrice.chotard@foss.st.com>, <christophe.kerello@foss.st.com>
Subject: [PATCH v2 2/3] mtd: spinand: use the spi-mem poll status APIs
Date: Fri, 7 May 2021 15:17:55 +0200 [thread overview]
Message-ID: <20210507131756.17028-3-patrice.chotard@foss.st.com> (raw)
In-Reply-To: <20210507131756.17028-1-patrice.chotard@foss.st.com>
From: Patrice Chotard <patrice.chotard@foss.st.com>
Make use of spi-mem poll status APIs to let advanced controllers
optimize wait operations.
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Signed-off-by: Christophe Kerello <christophe.kerello@foss.st.com>
---
Changes in v2:
- non-offload case is now managed by spi_mem_poll_status()
drivers/mtd/nand/spi/core.c | 17 +++++++++--------
include/linux/mtd/spinand.h | 1 +
2 files changed, 10 insertions(+), 8 deletions(-)
diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index 17f63f95f4a2..56f81c7a73a6 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -475,18 +475,19 @@ static int spinand_erase_op(struct spinand_device *spinand,
static int spinand_wait(struct spinand_device *spinand, u8 *s)
{
- unsigned long timeo = jiffies + msecs_to_jiffies(400);
+ struct spi_mem_op op = SPINAND_GET_FEATURE_OP(REG_STATUS,
+ spinand->scratchbuf);
u8 status;
int ret;
- do {
- ret = spinand_read_status(spinand, &status);
- if (ret)
- return ret;
+ ret = spi_mem_poll_status(spinand->spimem, &op, STATUS_BUSY, 0,
+ SPINAND_STATUS_TIMEOUT_MS);
+ if (ret)
+ return ret;
- if (!(status & STATUS_BUSY))
- goto out;
- } while (time_before(jiffies, timeo));
+ status = *spinand->scratchbuf;
+ if (!(status & STATUS_BUSY))
+ goto out;
/*
* Extra read, just in case the STATUS_READY bit has changed
diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h
index 6bb92f26833e..28ee481d96eb 100644
--- a/include/linux/mtd/spinand.h
+++ b/include/linux/mtd/spinand.h
@@ -170,6 +170,7 @@ struct spinand_op;
struct spinand_device;
#define SPINAND_MAX_ID_LEN 4
+#define SPINAND_STATUS_TIMEOUT_MS 400
/**
* struct spinand_id - SPI NAND id structure
--
2.17.1
next prev parent reply other threads:[~2021-05-07 13:18 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-07 13:17 [PATCH v2 0/3] MTD: spinand: Add spi_mem_poll_status() support patrice.chotard
2021-05-07 13:17 ` [PATCH v2 1/3] spi: spi-mem: add automatic poll status functions patrice.chotard
2021-05-08 7:55 ` Boris Brezillon
2021-05-10 8:46 ` Patrice CHOTARD
2021-05-10 9:22 ` Boris Brezillon
2021-05-17 7:29 ` Patrice CHOTARD
2021-05-17 7:41 ` Boris Brezillon
2021-05-17 9:24 ` Patrice CHOTARD
2021-05-17 11:25 ` Boris Brezillon
2021-05-17 11:59 ` Patrice CHOTARD
2021-05-17 12:24 ` Boris Brezillon
2021-05-17 12:04 ` Patrice CHOTARD
2021-05-07 13:17 ` patrice.chotard [this message]
2021-05-07 13:17 ` [PATCH v2 3/3] spi: stm32-qspi: add automatic poll status feature patrice.chotard
2021-05-07 19:29 ` kernel test robot
2021-05-07 22:16 ` kernel test robot
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