All of lore.kernel.org
 help / color / mirror / Atom feed
From: Arnd Bergmann <arnd@arndb.de>
To: soc@kernel.org
Cc: Arnd Bergmann <arnd@arndb.de>, Mark Brown <broonie@kernel.org>,
	linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org
Subject: [PATCH 07/16] spi: remove w90x900 driver
Date: Fri,  9 Aug 2019 22:27:35 +0200	[thread overview]
Message-ID: <20190809202749.742267-8-arnd@arndb.de> (raw)
In-Reply-To: <20190809202749.742267-1-arnd@arndb.de>

The ARM w90x900 platform is getting removed, so this driver is obsolete.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/spi/Kconfig                      |   7 -
 drivers/spi/Makefile                     |   1 -
 drivers/spi/spi-nuc900.c                 | 429 -----------------------
 include/Kbuild                           |   1 -
 include/linux/platform_data/spi-nuc900.h |  29 --
 5 files changed, 467 deletions(-)
 delete mode 100644 drivers/spi/spi-nuc900.c
 delete mode 100644 include/linux/platform_data/spi-nuc900.h

diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 3a1d8f1170de..949b18ed9d6b 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -440,13 +440,6 @@ config SPI_NPCM_PSPI
 	  This driver provides support for Nuvoton NPCM BMC
 	  Peripheral SPI controller in master mode.
 
-config SPI_NUC900
-	tristate "Nuvoton NUC900 series SPI"
-	depends on ARCH_W90X900
-	select SPI_BITBANG
-	help
-	  SPI driver for Nuvoton NUC900 series ARM SoCs
-
 config SPI_LANTIQ_SSC
 	tristate "Lantiq SSC SPI controller"
 	depends on LANTIQ || COMPILE_TEST
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 63dcab552bcb..b1131809a294 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -64,7 +64,6 @@ obj-$(CONFIG_SPI_MT7621)		+= spi-mt7621.o
 obj-$(CONFIG_SPI_MXIC)			+= spi-mxic.o
 obj-$(CONFIG_SPI_MXS)			+= spi-mxs.o
 obj-$(CONFIG_SPI_NPCM_PSPI)		+= spi-npcm-pspi.o
-obj-$(CONFIG_SPI_NUC900)		+= spi-nuc900.o
 obj-$(CONFIG_SPI_NXP_FLEXSPI)		+= spi-nxp-fspi.o
 obj-$(CONFIG_SPI_OC_TINY)		+= spi-oc-tiny.o
 spi-octeon-objs				:= spi-cavium.o spi-cavium-octeon.o
diff --git a/drivers/spi/spi-nuc900.c b/drivers/spi/spi-nuc900.c
deleted file mode 100644
index 37e2034ad4d5..000000000000
--- a/drivers/spi/spi-nuc900.c
+++ /dev/null
@@ -1,429 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (c) 2009 Nuvoton technology.
- * Wan ZongShun <mcuos.com@gmail.com>
- */
-
-#include <linux/module.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/err.h>
-#include <linux/clk.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
-#include <linux/gpio.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-
-#include <linux/spi/spi.h>
-#include <linux/spi/spi_bitbang.h>
-
-#include <linux/platform_data/spi-nuc900.h>
-
-/* usi registers offset */
-#define USI_CNT		0x00
-#define USI_DIV		0x04
-#define USI_SSR		0x08
-#define USI_RX0		0x10
-#define USI_TX0		0x10
-
-/* usi register bit */
-#define ENINT		(0x01 << 17)
-#define ENFLG		(0x01 << 16)
-#define SLEEP		(0x0f << 12)
-#define TXNUM		(0x03 << 8)
-#define TXBITLEN	(0x1f << 3)
-#define TXNEG		(0x01 << 2)
-#define RXNEG		(0x01 << 1)
-#define LSB		(0x01 << 10)
-#define SELECTLEV	(0x01 << 2)
-#define SELECTPOL	(0x01 << 31)
-#define SELECTSLAVE	0x01
-#define GOBUSY		0x01
-
-struct nuc900_spi {
-	struct spi_bitbang	 bitbang;
-	struct completion	 done;
-	void __iomem		*regs;
-	int			 irq;
-	int			 len;
-	int			 count;
-	const unsigned char	*tx;
-	unsigned char		*rx;
-	struct clk		*clk;
-	struct spi_master	*master;
-	struct nuc900_spi_info *pdata;
-	spinlock_t		lock;
-};
-
-static inline struct nuc900_spi *to_hw(struct spi_device *sdev)
-{
-	return spi_master_get_devdata(sdev->master);
-}
-
-static void nuc900_slave_select(struct spi_device *spi, unsigned int ssr)
-{
-	struct nuc900_spi *hw = to_hw(spi);
-	unsigned int val;
-	unsigned int cs = spi->mode & SPI_CS_HIGH ? 1 : 0;
-	unsigned int cpol = spi->mode & SPI_CPOL ? 1 : 0;
-	unsigned long flags;
-
-	spin_lock_irqsave(&hw->lock, flags);
-
-	val = __raw_readl(hw->regs + USI_SSR);
-
-	if (!cs)
-		val &= ~SELECTLEV;
-	else
-		val |= SELECTLEV;
-
-	if (!ssr)
-		val &= ~SELECTSLAVE;
-	else
-		val |= SELECTSLAVE;
-
-	__raw_writel(val, hw->regs + USI_SSR);
-
-	val = __raw_readl(hw->regs + USI_CNT);
-
-	if (!cpol)
-		val &= ~SELECTPOL;
-	else
-		val |= SELECTPOL;
-
-	__raw_writel(val, hw->regs + USI_CNT);
-
-	spin_unlock_irqrestore(&hw->lock, flags);
-}
-
-static void nuc900_spi_chipsel(struct spi_device *spi, int value)
-{
-	switch (value) {
-	case BITBANG_CS_INACTIVE:
-		nuc900_slave_select(spi, 0);
-		break;
-
-	case BITBANG_CS_ACTIVE:
-		nuc900_slave_select(spi, 1);
-		break;
-	}
-}
-
-static void nuc900_spi_setup_txnum(struct nuc900_spi *hw, unsigned int txnum)
-{
-	unsigned int val;
-	unsigned long flags;
-
-	spin_lock_irqsave(&hw->lock, flags);
-
-	val = __raw_readl(hw->regs + USI_CNT) & ~TXNUM;
-
-	if (txnum)
-		val |= txnum << 0x08;
-
-	__raw_writel(val, hw->regs + USI_CNT);
-
-	spin_unlock_irqrestore(&hw->lock, flags);
-
-}
-
-static void nuc900_spi_setup_txbitlen(struct nuc900_spi *hw,
-							unsigned int txbitlen)
-{
-	unsigned int val;
-	unsigned long flags;
-
-	spin_lock_irqsave(&hw->lock, flags);
-
-	val = __raw_readl(hw->regs + USI_CNT) & ~TXBITLEN;
-
-	val |= (txbitlen << 0x03);
-
-	__raw_writel(val, hw->regs + USI_CNT);
-
-	spin_unlock_irqrestore(&hw->lock, flags);
-}
-
-static void nuc900_spi_gobusy(struct nuc900_spi *hw)
-{
-	unsigned int val;
-	unsigned long flags;
-
-	spin_lock_irqsave(&hw->lock, flags);
-
-	val = __raw_readl(hw->regs + USI_CNT);
-
-	val |= GOBUSY;
-
-	__raw_writel(val, hw->regs + USI_CNT);
-
-	spin_unlock_irqrestore(&hw->lock, flags);
-}
-
-static inline unsigned int hw_txbyte(struct nuc900_spi *hw, int count)
-{
-	return hw->tx ? hw->tx[count] : 0;
-}
-
-static int nuc900_spi_txrx(struct spi_device *spi, struct spi_transfer *t)
-{
-	struct nuc900_spi *hw = to_hw(spi);
-
-	hw->tx = t->tx_buf;
-	hw->rx = t->rx_buf;
-	hw->len = t->len;
-	hw->count = 0;
-
-	__raw_writel(hw_txbyte(hw, 0x0), hw->regs + USI_TX0);
-
-	nuc900_spi_gobusy(hw);
-
-	wait_for_completion(&hw->done);
-
-	return hw->count;
-}
-
-static irqreturn_t nuc900_spi_irq(int irq, void *dev)
-{
-	struct nuc900_spi *hw = dev;
-	unsigned int status;
-	unsigned int count = hw->count;
-
-	status = __raw_readl(hw->regs + USI_CNT);
-	__raw_writel(status, hw->regs + USI_CNT);
-
-	if (status & ENFLG) {
-		hw->count++;
-
-		if (hw->rx)
-			hw->rx[count] = __raw_readl(hw->regs + USI_RX0);
-		count++;
-
-		if (count < hw->len) {
-			__raw_writel(hw_txbyte(hw, count), hw->regs + USI_TX0);
-			nuc900_spi_gobusy(hw);
-		} else {
-			complete(&hw->done);
-		}
-
-		return IRQ_HANDLED;
-	}
-
-	complete(&hw->done);
-	return IRQ_HANDLED;
-}
-
-static void nuc900_tx_edge(struct nuc900_spi *hw, unsigned int edge)
-{
-	unsigned int val;
-	unsigned long flags;
-
-	spin_lock_irqsave(&hw->lock, flags);
-
-	val = __raw_readl(hw->regs + USI_CNT);
-
-	if (edge)
-		val |= TXNEG;
-	else
-		val &= ~TXNEG;
-	__raw_writel(val, hw->regs + USI_CNT);
-
-	spin_unlock_irqrestore(&hw->lock, flags);
-}
-
-static void nuc900_rx_edge(struct nuc900_spi *hw, unsigned int edge)
-{
-	unsigned int val;
-	unsigned long flags;
-
-	spin_lock_irqsave(&hw->lock, flags);
-
-	val = __raw_readl(hw->regs + USI_CNT);
-
-	if (edge)
-		val |= RXNEG;
-	else
-		val &= ~RXNEG;
-	__raw_writel(val, hw->regs + USI_CNT);
-
-	spin_unlock_irqrestore(&hw->lock, flags);
-}
-
-static void nuc900_send_first(struct nuc900_spi *hw, unsigned int lsb)
-{
-	unsigned int val;
-	unsigned long flags;
-
-	spin_lock_irqsave(&hw->lock, flags);
-
-	val = __raw_readl(hw->regs + USI_CNT);
-
-	if (lsb)
-		val |= LSB;
-	else
-		val &= ~LSB;
-	__raw_writel(val, hw->regs + USI_CNT);
-
-	spin_unlock_irqrestore(&hw->lock, flags);
-}
-
-static void nuc900_set_sleep(struct nuc900_spi *hw, unsigned int sleep)
-{
-	unsigned int val;
-	unsigned long flags;
-
-	spin_lock_irqsave(&hw->lock, flags);
-
-	val = __raw_readl(hw->regs + USI_CNT) & ~SLEEP;
-
-	if (sleep)
-		val |= (sleep << 12);
-
-	__raw_writel(val, hw->regs + USI_CNT);
-
-	spin_unlock_irqrestore(&hw->lock, flags);
-}
-
-static void nuc900_enable_int(struct nuc900_spi *hw)
-{
-	unsigned int val;
-	unsigned long flags;
-
-	spin_lock_irqsave(&hw->lock, flags);
-
-	val = __raw_readl(hw->regs + USI_CNT);
-
-	val |= ENINT;
-
-	__raw_writel(val, hw->regs + USI_CNT);
-
-	spin_unlock_irqrestore(&hw->lock, flags);
-}
-
-static void nuc900_set_divider(struct nuc900_spi *hw)
-{
-	__raw_writel(hw->pdata->divider, hw->regs + USI_DIV);
-}
-
-static void nuc900_init_spi(struct nuc900_spi *hw)
-{
-	clk_enable(hw->clk);
-	spin_lock_init(&hw->lock);
-
-	nuc900_tx_edge(hw, hw->pdata->txneg);
-	nuc900_rx_edge(hw, hw->pdata->rxneg);
-	nuc900_send_first(hw, hw->pdata->lsb);
-	nuc900_set_sleep(hw, hw->pdata->sleep);
-	nuc900_spi_setup_txbitlen(hw, hw->pdata->txbitlen);
-	nuc900_spi_setup_txnum(hw, hw->pdata->txnum);
-	nuc900_set_divider(hw);
-	nuc900_enable_int(hw);
-}
-
-static int nuc900_spi_probe(struct platform_device *pdev)
-{
-	struct nuc900_spi *hw;
-	struct spi_master *master;
-	struct resource *res;
-	int err = 0;
-
-	master = spi_alloc_master(&pdev->dev, sizeof(struct nuc900_spi));
-	if (master == NULL) {
-		dev_err(&pdev->dev, "No memory for spi_master\n");
-		return -ENOMEM;
-	}
-
-	hw = spi_master_get_devdata(master);
-	hw->master = master;
-	hw->pdata  = dev_get_platdata(&pdev->dev);
-
-	if (hw->pdata == NULL) {
-		dev_err(&pdev->dev, "No platform data supplied\n");
-		err = -ENOENT;
-		goto err_pdata;
-	}
-
-	platform_set_drvdata(pdev, hw);
-	init_completion(&hw->done);
-
-	master->mode_bits          = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
-	if (hw->pdata->lsb)
-		master->mode_bits |= SPI_LSB_FIRST;
-	master->num_chipselect     = hw->pdata->num_cs;
-	master->bus_num            = hw->pdata->bus_num;
-	hw->bitbang.master         = hw->master;
-	hw->bitbang.chipselect     = nuc900_spi_chipsel;
-	hw->bitbang.txrx_bufs      = nuc900_spi_txrx;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	hw->regs = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(hw->regs)) {
-		err = PTR_ERR(hw->regs);
-		goto err_pdata;
-	}
-
-	hw->irq = platform_get_irq(pdev, 0);
-	if (hw->irq < 0) {
-		dev_err(&pdev->dev, "No IRQ specified\n");
-		err = -ENOENT;
-		goto err_pdata;
-	}
-
-	err = devm_request_irq(&pdev->dev, hw->irq, nuc900_spi_irq, 0,
-				pdev->name, hw);
-	if (err) {
-		dev_err(&pdev->dev, "Cannot claim IRQ\n");
-		goto err_pdata;
-	}
-
-	hw->clk = devm_clk_get(&pdev->dev, "spi");
-	if (IS_ERR(hw->clk)) {
-		dev_err(&pdev->dev, "No clock for device\n");
-		err = PTR_ERR(hw->clk);
-		goto err_pdata;
-	}
-
-	mfp_set_groupg(&pdev->dev, NULL);
-	nuc900_init_spi(hw);
-
-	err = spi_bitbang_start(&hw->bitbang);
-	if (err) {
-		dev_err(&pdev->dev, "Failed to register SPI master\n");
-		goto err_register;
-	}
-
-	return 0;
-
-err_register:
-	clk_disable(hw->clk);
-err_pdata:
-	spi_master_put(hw->master);
-	return err;
-}
-
-static int nuc900_spi_remove(struct platform_device *dev)
-{
-	struct nuc900_spi *hw = platform_get_drvdata(dev);
-
-	spi_bitbang_stop(&hw->bitbang);
-	clk_disable(hw->clk);
-	spi_master_put(hw->master);
-	return 0;
-}
-
-static struct platform_driver nuc900_spi_driver = {
-	.probe		= nuc900_spi_probe,
-	.remove		= nuc900_spi_remove,
-	.driver		= {
-		.name	= "nuc900-spi",
-	},
-};
-module_platform_driver(nuc900_spi_driver);
-
-MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
-MODULE_DESCRIPTION("nuc900 spi driver!");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:nuc900-spi");
diff --git a/include/Kbuild b/include/Kbuild
index c38f0d46b267..5e0642d79dce 100644
--- a/include/Kbuild
+++ b/include/Kbuild
@@ -550,7 +550,6 @@ header-test-			+= linux/platform_data/sky81452-backlight.h
 header-test-			+= linux/platform_data/spi-davinci.h
 header-test-			+= linux/platform_data/spi-ep93xx.h
 header-test-			+= linux/platform_data/spi-mt65xx.h
-header-test-			+= linux/platform_data/spi-nuc900.h
 header-test-			+= linux/platform_data/st_sensors_pdata.h
 header-test-			+= linux/platform_data/ti-sysc.h
 header-test-			+= linux/platform_data/timer-ixp4xx.h
diff --git a/include/linux/platform_data/spi-nuc900.h b/include/linux/platform_data/spi-nuc900.h
deleted file mode 100644
index ca3510877000..000000000000
--- a/include/linux/platform_data/spi-nuc900.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (c) 2009 Nuvoton technology corporation.
- *
- * Wan ZongShun <mcuos.com@gmail.com>
- */
-
-#ifndef __SPI_NUC900_H
-#define __SPI_NUC900_H
-
-extern void mfp_set_groupg(struct device *dev, const char *subname);
-
-struct nuc900_spi_info {
-	unsigned int num_cs;
-	unsigned int lsb;
-	unsigned int txneg;
-	unsigned int rxneg;
-	unsigned int divider;
-	unsigned int sleep;
-	unsigned int txnum;
-	unsigned int txbitlen;
-	int bus_num;
-};
-
-struct nuc900_spi_chip {
-	unsigned char bits_per_word;
-};
-
-#endif /* __SPI_NUC900_H */
-- 
2.20.0


  parent reply	other threads:[~2019-08-09 20:28 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-09 20:27 [PATCH 00/16] ARM: remove ks8695 and w90x900 platforms Arnd Bergmann
2019-08-09 20:27 ` Arnd Bergmann
2019-08-09 20:27 ` Arnd Bergmann
2019-08-09 20:27 ` Arnd Bergmann
2019-08-09 20:27 ` [PATCH 01/16] ARM: remove ks8695 platform Arnd Bergmann
2019-08-09 20:27   ` Arnd Bergmann
2019-08-11  9:18   ` Ben Dooks
2019-08-12  3:59   ` Greg Ungerer
2019-08-13 15:27   ` Ben Dooks
2019-08-13 15:27     ` Ben Dooks
2019-08-09 20:27 ` [PATCH 02/16] serial: remove ks8695 driver Arnd Bergmann
2019-08-09 20:27 ` [PATCH 03/16] gpio: " Arnd Bergmann
2019-08-10  9:03   ` Linus Walleij
2019-08-09 20:27 ` [PATCH 04/16] watchdog: " Arnd Bergmann
2019-08-09 20:42   ` Guenter Roeck
2019-08-10  8:37     ` Arnd Bergmann
2019-08-10 12:56       ` Guenter Roeck
2019-08-09 20:27 ` [PATCH 05/16] net: " Arnd Bergmann
2019-08-09 20:27 ` [PATCH 06/16] watchdog: remove w90x900 driver Arnd Bergmann
2019-08-09 20:42   ` Guenter Roeck
2019-08-09 20:27 ` Arnd Bergmann [this message]
2019-08-12 10:36   ` [PATCH 07/16] spi: " Mark Brown
2019-08-12 13:06   ` Mark Brown
2019-08-09 20:27 ` [PATCH 08/16] ASoC: remove w90x900/nuc900 platform drivers Arnd Bergmann
2019-08-12 10:36   ` Mark Brown
2019-08-12 13:09   ` Applied "ASoC: remove w90x900/nuc900 platform drivers" to the asoc tree Mark Brown
2019-08-12 13:09     ` Mark Brown
2019-08-09 20:27 ` [PATCH 09/16] fbdev: remove w90x900/nuc900 platform drivers Arnd Bergmann
2019-08-09 20:27   ` Arnd Bergmann
2019-08-09 20:27   ` Arnd Bergmann
2019-08-13 13:30   ` Bartlomiej Zolnierkiewicz
2019-08-13 13:30     ` Bartlomiej Zolnierkiewicz
2019-08-13 13:40     ` Arnd Bergmann
2019-08-13 13:40       ` Arnd Bergmann
2019-08-13 13:40       ` Arnd Bergmann
2019-08-09 20:27 ` [PATCH 10/16] Input: remove w90x900 keyboard driver Arnd Bergmann
2019-08-09 21:56   ` Dmitry Torokhov
2019-08-09 20:27 ` [PATCH 11/16] Input: remove w90x900 touchscreen driver Arnd Bergmann
2019-08-09 21:56   ` Dmitry Torokhov
2019-08-09 20:27 ` [PATCH 12/16] mtd: rawnand: remove w90x900 driver Arnd Bergmann
2019-08-09 20:27   ` Arnd Bergmann
2019-08-10  8:21   ` Boris Brezillon
2019-08-10  8:21     ` Boris Brezillon
2019-08-26 12:58   ` Miquel Raynal
2019-08-26 12:58     ` Miquel Raynal
2019-08-09 20:27 ` [PATCH 13/16] net: remove w90p910-ether driver Arnd Bergmann
2019-08-09 20:27 ` [PATCH 14/16] rtc: remove w90x900/nuc900 driver Arnd Bergmann
2019-08-12 20:57   ` Alexandre Belloni
2019-08-09 20:27 ` [PATCH 15/16] usb: remove ehci-w90x900 driver Arnd Bergmann
2019-08-09 20:27 ` [PATCH 16/16] ARM: remove w90x900 platform Arnd Bergmann
2019-08-09 20:27   ` Arnd Bergmann
2019-08-10  7:29 ` [PATCH 00/16] ARM: remove ks8695 and w90x900 platforms Greg Kroah-Hartman
2019-08-10  7:29   ` Greg Kroah-Hartman
2019-08-10  7:29   ` Greg Kroah-Hartman
2019-08-10  7:29   ` Greg Kroah-Hartman

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190809202749.742267-8-arnd@arndb.de \
    --to=arnd@arndb.de \
    --cc=broonie@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-spi@vger.kernel.org \
    --cc=soc@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.