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-rw-r--r--Documentation/devicetree/bindings/spi/spi-mt7621.txt26
-rw-r--r--drivers/spi/Kconfig6
-rw-r--r--drivers/spi/Makefile1
-rw-r--r--drivers/spi/spi-mt7621.c (renamed from drivers/staging/mt7621-spi/spi-mt7621.c)83
-rw-r--r--drivers/staging/Kconfig2
-rw-r--r--drivers/staging/Makefile1
-rw-r--r--drivers/staging/mt7621-spi/Kconfig6
-rw-r--r--drivers/staging/mt7621-spi/Makefile1
-rw-r--r--drivers/staging/mt7621-spi/TODO5
9 files changed, 74 insertions, 57 deletions
diff --git a/Documentation/devicetree/bindings/spi/spi-mt7621.txt b/Documentation/devicetree/bindings/spi/spi-mt7621.txt
new file mode 100644
index 000000000000..d5baec0fa56e
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/spi-mt7621.txt
@@ -0,0 +1,26 @@
+Binding for MTK SPI controller (MT7621 MIPS)
+
+Required properties:
+- compatible: Should be one of the following:
+ - "ralink,mt7621-spi": for mt7621/mt7628/mt7688 platforms
+- #address-cells: should be 1.
+- #size-cells: should be 0.
+- reg: Address and length of the register set for the device
+- resets: phandle to the reset controller asserting this device in
+ reset
+ See ../reset/reset.txt for details.
+
+Optional properties:
+- cs-gpios: see spi-bus.txt.
+
+Example:
+
+- SoC Specific Portion:
+spi0: spi@b00 {
+ compatible = "ralink,mt7621-spi";
+ reg = <0xb00 0x100>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ resets = <&rstctrl 18>;
+ reset-names = "spi";
+};
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index f761655e2a36..8ce4f7df0ef2 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -426,6 +426,12 @@ config SPI_MT65XX
say Y or M here.If you are not sure, say N.
SPI drivers for Mediatek MT65XX and MT81XX series ARM SoCs.
+config SPI_MT7621
+ tristate "MediaTek MT7621 SPI Controller"
+ depends on RALINK || COMPILE_TEST
+ help
+ This selects a driver for the MediaTek MT7621 SPI Controller.
+
config SPI_NPCM_PSPI
tristate "Nuvoton NPCM PSPI Controller"
depends on ARCH_NPCM || COMPILE_TEST
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index d8fc03c9faa2..369f29a8a6af 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -60,6 +60,7 @@ obj-$(CONFIG_SPI_MPC512x_PSC) += spi-mpc512x-psc.o
obj-$(CONFIG_SPI_MPC52xx_PSC) += spi-mpc52xx-psc.o
obj-$(CONFIG_SPI_MPC52xx) += spi-mpc52xx.o
obj-$(CONFIG_SPI_MT65XX) += spi-mt65xx.o
+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
diff --git a/drivers/staging/mt7621-spi/spi-mt7621.c b/drivers/spi/spi-mt7621.c
index b509f9fe3346..ae836114ee3d 100644
--- a/drivers/staging/mt7621-spi/spi-mt7621.c
+++ b/drivers/spi/spi-mt7621.c
@@ -1,15 +1,14 @@
// SPDX-License-Identifier: GPL-2.0
-/*
- * spi-mt7621.c -- MediaTek MT7621 SPI controller driver
- *
- * Copyright (C) 2011 Sergiy <piratfm@gmail.com>
- * Copyright (C) 2011-2013 Gabor Juhos <juhosg@openwrt.org>
- * Copyright (C) 2014-2015 Felix Fietkau <nbd@nbd.name>
- *
- * Some parts are based on spi-orion.c:
- * Author: Shadi Ammouri <shadi@marvell.com>
- * Copyright (C) 2007-2008 Marvell Ltd.
- */
+//
+// spi-mt7621.c -- MediaTek MT7621 SPI controller driver
+//
+// Copyright (C) 2011 Sergiy <piratfm@gmail.com>
+// Copyright (C) 2011-2013 Gabor Juhos <juhosg@openwrt.org>
+// Copyright (C) 2014-2015 Felix Fietkau <nbd@nbd.name>
+//
+// Some parts are based on spi-orion.c:
+// Author: Shadi Ammouri <shadi@marvell.com>
+// Copyright (C) 2007-2008 Marvell Ltd.
#include <linux/clk.h>
#include <linux/delay.h>
@@ -52,7 +51,7 @@
#define MT7621_LSB_FIRST BIT(3)
struct mt7621_spi {
- struct spi_master *master;
+ struct spi_controller *master;
void __iomem *base;
unsigned int sys_freq;
unsigned int speed;
@@ -64,7 +63,7 @@ struct mt7621_spi {
static inline struct mt7621_spi *spidev_to_mt7621_spi(struct spi_device *spi)
{
- return spi_master_get_devdata(spi->master);
+ return spi_controller_get_devdata(spi->master);
}
static inline u32 mt7621_spi_read(struct mt7621_spi *rs, u32 reg)
@@ -77,29 +76,25 @@ static inline void mt7621_spi_write(struct mt7621_spi *rs, u32 reg, u32 val)
iowrite32(val, rs->base + reg);
}
-static void mt7621_spi_reset(struct mt7621_spi *rs)
+static void mt7621_spi_set_cs(struct spi_device *spi, int enable)
{
- u32 master = mt7621_spi_read(rs, MT7621_SPI_MASTER);
+ struct mt7621_spi *rs = spidev_to_mt7621_spi(spi);
+ int cs = spi->chip_select;
+ u32 polar = 0;
+ u32 master;
/*
* Select SPI device 7, enable "more buffer mode" and disable
* full-duplex (only half-duplex really works on this chip
* reliably)
*/
+ master = mt7621_spi_read(rs, MT7621_SPI_MASTER);
master |= MASTER_RS_SLAVE_SEL | MASTER_MORE_BUFMODE;
master &= ~MASTER_FULL_DUPLEX;
-
mt7621_spi_write(rs, MT7621_SPI_MASTER, master);
- rs->pending_write = 0;
-}
-static void mt7621_spi_set_cs(struct spi_device *spi, int enable)
-{
- struct mt7621_spi *rs = spidev_to_mt7621_spi(spi);
- int cs = spi->chip_select;
- u32 polar = 0;
+ rs->pending_write = 0;
- mt7621_spi_reset(rs);
if (enable)
polar = BIT(cs);
mt7621_spi_write(rs, MT7621_SPI_POLAR, polar);
@@ -163,13 +158,14 @@ static inline int mt7621_spi_wait_till_ready(struct mt7621_spi *rs)
static void mt7621_spi_read_half_duplex(struct mt7621_spi *rs,
int rx_len, u8 *buf)
{
+ int tx_len;
+
/*
* Combine with any pending write, and perform one or more half-duplex
* transactions reading 'len' bytes. Data to be written is already in
* MT7621_SPI_DATA.
*/
- int tx_len = rs->pending_write;
-
+ tx_len = rs->pending_write;
rs->pending_write = 0;
while (rx_len || tx_len) {
@@ -209,8 +205,8 @@ static inline void mt7621_spi_flush(struct mt7621_spi *rs)
static void mt7621_spi_write_half_duplex(struct mt7621_spi *rs,
int tx_len, const u8 *buf)
{
- int val = 0;
int len = rs->pending_write;
+ int val = 0;
if (len & 3) {
val = mt7621_spi_read(rs, MT7621_SPI_OPCODE + (len & ~3));
@@ -238,6 +234,7 @@ static void mt7621_spi_write_half_duplex(struct mt7621_spi *rs,
}
tx_len -= 1;
}
+
if (len & 3) {
if (len < 4) {
val = swab32(val);
@@ -245,13 +242,14 @@ static void mt7621_spi_write_half_duplex(struct mt7621_spi *rs,
}
mt7621_spi_write(rs, MT7621_SPI_OPCODE + (len & ~3), val);
}
+
rs->pending_write = len;
}
-static int mt7621_spi_transfer_one_message(struct spi_master *master,
+static int mt7621_spi_transfer_one_message(struct spi_controller *master,
struct spi_message *m)
{
- struct mt7621_spi *rs = spi_master_get_devdata(master);
+ struct mt7621_spi *rs = spi_controller_get_devdata(master);
struct spi_device *spi = m->spi;
unsigned int speed = spi->max_speed_hz;
struct spi_transfer *t = NULL;
@@ -268,11 +266,14 @@ static int mt7621_spi_transfer_one_message(struct spi_master *master,
goto msg_done;
}
+ /* Assert CS */
mt7621_spi_set_cs(spi, 1);
+
m->actual_length = 0;
list_for_each_entry(t, &m->transfers, transfer_list) {
if ((t->rx_buf) && (t->tx_buf)) {
- /* This controller will shift some extra data out
+ /*
+ * This controller will shift some extra data out
* of spi_opcode if (mosi_bit_cnt > 0) &&
* (cmd_bit_cnt == 0). So the claimed full-duplex
* support is broken since we have no way to read
@@ -287,8 +288,9 @@ static int mt7621_spi_transfer_one_message(struct spi_master *master,
}
m->actual_length += t->len;
}
- mt7621_spi_flush(rs);
+ /* Flush data and deassert CS */
+ mt7621_spi_flush(rs);
mt7621_spi_set_cs(spi, 0);
msg_done:
@@ -303,7 +305,7 @@ static int mt7621_spi_setup(struct spi_device *spi)
struct mt7621_spi *rs = spidev_to_mt7621_spi(spi);
if ((spi->max_speed_hz == 0) ||
- (spi->max_speed_hz > (rs->sys_freq / 2)))
+ (spi->max_speed_hz > (rs->sys_freq / 2)))
spi->max_speed_hz = (rs->sys_freq / 2);
if (spi->max_speed_hz < (rs->sys_freq / 4097)) {
@@ -324,7 +326,7 @@ MODULE_DEVICE_TABLE(of, mt7621_spi_match);
static int mt7621_spi_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
- struct spi_master *master;
+ struct spi_controller *master;
struct mt7621_spi *rs;
void __iomem *base;
struct resource *r;
@@ -361,7 +363,7 @@ static int mt7621_spi_probe(struct platform_device *pdev)
}
master->mode_bits = SPI_LSB_FIRST;
-
+ master->flags = SPI_CONTROLLER_HALF_DUPLEX;
master->setup = mt7621_spi_setup;
master->transfer_one_message = mt7621_spi_transfer_one_message;
master->bits_per_word_mask = SPI_BPW_MASK(8);
@@ -370,7 +372,7 @@ static int mt7621_spi_probe(struct platform_device *pdev)
dev_set_drvdata(&pdev->dev, master);
- rs = spi_master_get_devdata(master);
+ rs = spi_controller_get_devdata(master);
rs->base = base;
rs->clk = clk;
rs->master = master;
@@ -385,21 +387,18 @@ static int mt7621_spi_probe(struct platform_device *pdev)
return ret;
}
- mt7621_spi_reset(rs);
-
- return spi_register_master(master);
+ return devm_spi_register_controller(&pdev->dev, master);
}
static int mt7621_spi_remove(struct platform_device *pdev)
{
- struct spi_master *master;
+ struct spi_controller *master;
struct mt7621_spi *rs;
master = dev_get_drvdata(&pdev->dev);
- rs = spi_master_get_devdata(master);
+ rs = spi_controller_get_devdata(master);
- clk_disable(rs->clk);
- spi_unregister_master(master);
+ clk_disable_unprepare(rs->clk);
return 0;
}
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index c0901b96cfe4..3241bd50d139 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -106,8 +106,6 @@ source "drivers/staging/mt7621-pci-phy/Kconfig"
source "drivers/staging/mt7621-pinctrl/Kconfig"
-source "drivers/staging/mt7621-spi/Kconfig"
-
source "drivers/staging/mt7621-dma/Kconfig"
source "drivers/staging/ralink-gdma/Kconfig"
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index 57c6bce13ff4..296ff11ecfae 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -43,7 +43,6 @@ obj-$(CONFIG_PI433) += pi433/
obj-$(CONFIG_PCI_MT7621) += mt7621-pci/
obj-$(CONFIG_PCI_MT7621_PHY) += mt7621-pci-phy/
obj-$(CONFIG_PINCTRL_RT2880) += mt7621-pinctrl/
-obj-$(CONFIG_SPI_MT7621) += mt7621-spi/
obj-$(CONFIG_SOC_MT7621) += mt7621-dma/
obj-$(CONFIG_DMA_RALINK) += ralink-gdma/
obj-$(CONFIG_MTK_MMC) += mt7621-mmc/
diff --git a/drivers/staging/mt7621-spi/Kconfig b/drivers/staging/mt7621-spi/Kconfig
deleted file mode 100644
index 0b90f4cfa426..000000000000
--- a/drivers/staging/mt7621-spi/Kconfig
+++ /dev/null
@@ -1,6 +0,0 @@
-config SPI_MT7621
- tristate "MediaTek MT7621 SPI Controller"
- depends on RALINK
- help
- This selects a driver for the MediaTek MT7621 SPI Controller.
-
diff --git a/drivers/staging/mt7621-spi/Makefile b/drivers/staging/mt7621-spi/Makefile
deleted file mode 100644
index 3be508f63bac..000000000000
--- a/drivers/staging/mt7621-spi/Makefile
+++ /dev/null
@@ -1 +0,0 @@
-obj-$(CONFIG_SPI_MT7621) += spi-mt7621.o
diff --git a/drivers/staging/mt7621-spi/TODO b/drivers/staging/mt7621-spi/TODO
deleted file mode 100644
index fdbc5002c32a..000000000000
--- a/drivers/staging/mt7621-spi/TODO
+++ /dev/null
@@ -1,5 +0,0 @@
-
-- general code review and clean up
-- ensure device-tree requirements are documented
-
-Cc: NeilBrown <neil@brown.name>
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 20:50:00 +0000