Applied "mtd: spi-nor: atmel-quadspi: Use spi-mem interface for atmel-quadspi driver" to the spi tree

Commit Message

Mark Brown Nov. 7, 2018, 3:05 p.m. UTC

The patch

   mtd: spi-nor: atmel-quadspi: Use spi-mem interface for atmel-quadspi driver

has been applied to the spi tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

From 2d30ac5ed633f5ad931d37fe46c748aa46f3cd8e Mon Sep 17 00:00:00 2001
From: Piotr Bugalski <[e-mail]>
Date: Mon, 5 Nov 2018 11:36:22 +0100
Subject: [PATCH] mtd: spi-nor: atmel-quadspi: Use spi-mem interface for
 atmel-quadspi driver

Previously added spi-mem interface is now used instead of older approach.

Suggested-by: Boris Brezillon <[e-mail]>
Signed-off-by: Piotr Bugalski <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>
---
 drivers/mtd/spi-nor/atmel-quadspi.c | 91 ++++++-----------------------
 1 file changed, 18 insertions(+), 73 deletions(-)

Patch

diff --git a/drivers/mtd/spi-nor/atmel-quadspi.c b/drivers/mtd/spi-nor/atmel-quadspi.c
index 896478a290ec..644e3f0c1558 100644
--- a/drivers/mtd/spi-nor/atmel-quadspi.c
+++ b/drivers/mtd/spi-nor/atmel-quadspi.c
@@ -766,27 +766,9 @@  static ssize_t atmel_qspi_read(struct spi_nor *nor, loff_t from, size_t len,
 
 static int atmel_qspi_init(struct atmel_qspi *aq)
 {
-	unsigned long src_rate;
-	u32 mr, scr, scbr;
-
 	/* Reset the QSPI controller */
 	qspi_writel(aq, QSPI_CR, QSPI_CR_SWRST);
 
-	/* Set the QSPI controller in Serial Memory Mode */
-	mr = QSPI_MR_NBBITS(8) | QSPI_MR_SMM;
-	qspi_writel(aq, QSPI_MR, mr);
-
-	src_rate = clk_get_rate(aq->clk);
-	if (!src_rate)
-		return -EINVAL;
-
-	/* Compute the QSPI baudrate */
-	scbr = DIV_ROUND_UP(src_rate, aq->clk_rate);
-	if (scbr > 0)
-		scbr--;
-	scr = QSPI_SCR_SCBR(scbr);
-	qspi_writel(aq, QSPI_SCR, scr);
-
 	/* Enable the QSPI controller */
 	qspi_writel(aq, QSPI_CR, QSPI_CR_QSPIEN);
 
@@ -814,38 +796,25 @@  static irqreturn_t atmel_qspi_interrupt(int irq, void *dev_id)
 
 static int atmel_qspi_probe(struct platform_device *pdev)
 {
-	const struct spi_nor_hwcaps hwcaps = {
-		.mask = SNOR_HWCAPS_READ |
-			SNOR_HWCAPS_READ_FAST |
-			SNOR_HWCAPS_READ_1_1_2 |
-			SNOR_HWCAPS_READ_1_2_2 |
-			SNOR_HWCAPS_READ_2_2_2 |
-			SNOR_HWCAPS_READ_1_1_4 |
-			SNOR_HWCAPS_READ_1_4_4 |
-			SNOR_HWCAPS_READ_4_4_4 |
-			SNOR_HWCAPS_PP |
-			SNOR_HWCAPS_PP_1_1_4 |
-			SNOR_HWCAPS_PP_1_4_4 |
-			SNOR_HWCAPS_PP_4_4_4,
-	};
-	struct device_node *child, *np = pdev->dev.of_node;
+	struct spi_controller *ctrl;
 	struct atmel_qspi *aq;
 	struct resource *res;
-	struct spi_nor *nor;
-	struct mtd_info *mtd;
 	int irq, err = 0;
 
-	if (of_get_child_count(np) != 1)
-		return -ENODEV;
-	child = of_get_next_child(np, NULL);
+	ctrl = spi_alloc_master(&pdev->dev, sizeof(*aq));
+	if (!ctrl)
+		return -ENOMEM;
 
-	aq = devm_kzalloc(&pdev->dev, sizeof(*aq), GFP_KERNEL);
-	if (!aq) {
-		err = -ENOMEM;
-		goto exit;
-	}
+	ctrl->mode_bits = SPI_RX_DUAL | SPI_RX_QUAD | SPI_TX_DUAL | SPI_TX_QUAD;
+	ctrl->setup = atmel_qspi_setup;
+	ctrl->bus_num = -1;
+	ctrl->mem_ops = &atmel_qspi_mem_ops;
+	ctrl->num_chipselect = 1;
+	ctrl->dev.of_node = pdev->dev.of_node;
+	platform_set_drvdata(pdev, ctrl);
+
+	aq = spi_controller_get_devdata(ctrl);
 
-	platform_set_drvdata(pdev, aq);
 	init_completion(&aq->cmd_completion);
 	aq->pdev = pdev;
 
@@ -894,54 +863,30 @@  static int atmel_qspi_probe(struct platform_device *pdev)
 	if (err)
 		goto disable_clk;
 
-	/* Setup the spi-nor */
-	nor = &aq->nor;
-	mtd = &nor->mtd;
-
-	nor->dev = &pdev->dev;
-	spi_nor_set_flash_node(nor, child);
-	nor->priv = aq;
-	mtd->priv = nor;
-
-	nor->read_reg = atmel_qspi_read_reg;
-	nor->write_reg = atmel_qspi_write_reg;
-	nor->read = atmel_qspi_read;
-	nor->write = atmel_qspi_write;
-	nor->erase = atmel_qspi_erase;
-
-	err = of_property_read_u32(child, "spi-max-frequency", &aq->clk_rate);
-	if (err < 0)
-		goto disable_clk;
-
 	err = atmel_qspi_init(aq);
 	if (err)
 		goto disable_clk;
 
-	err = spi_nor_scan(nor, NULL, &hwcaps);
-	if (err)
-		goto disable_clk;
-
-	err = mtd_device_register(mtd, NULL, 0);
+	err = spi_register_controller(ctrl);
 	if (err)
 		goto disable_clk;
 
-	of_node_put(child);
-
 	return 0;
 
 disable_clk:
 	clk_disable_unprepare(aq->clk);
 exit:
-	of_node_put(child);
+	spi_controller_put(ctrl);
 
 	return err;
 }
 
 static int atmel_qspi_remove(struct platform_device *pdev)
 {
-	struct atmel_qspi *aq = platform_get_drvdata(pdev);
+	struct spi_controller *ctrl = platform_get_drvdata(pdev);
+	struct atmel_qspi *aq = spi_controller_get_devdata(ctrl);
 
-	mtd_device_unregister(&aq->nor.mtd);
+	spi_unregister_controller(ctrl);
 	qspi_writel(aq, QSPI_CR, QSPI_CR_QSPIDIS);
 	clk_disable_unprepare(aq->clk);
 	return 0;