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Date: Mon, 14 Dec 2020 14:31:44 +0100
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, kuba@...nel.org, linux-can@...r.kernel.org,
kernel@...gutronix.de, Marc Kleine-Budde <mkl@...gutronix.de>,
Sean Nyekjaer <sean@...nix.com>, Dan Murphy <dmurphy@...com>
Subject: [net-next 6/7] can: m_can: let m_can_class_allocate_dev() allocate driver specific private data
This patch enhances m_can_class_allocate_dev() to allocate driver specific
private data. The driver's private data struct must contain struct
m_can_classdev as its first member followed by the remaining private data.
Link: https://lore.kernel.org/r/20201212175518.139651-7-mkl@pengutronix.de
Reviewed-by: Sean Nyekjaer <sean@...nix.com>
Reviewed-by: Dan Murphy <dmurphy@...com>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
drivers/net/can/m_can/m_can.c | 5 +--
drivers/net/can/m_can/m_can.h | 4 +--
drivers/net/can/m_can/m_can_pci.c | 27 +++++++++-------
drivers/net/can/m_can/m_can_platform.c | 26 ++++++++-------
drivers/net/can/m_can/tcan4x5x.c | 44 +++++++++++++-------------
5 files changed, 56 insertions(+), 50 deletions(-)
diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index f258c81db0c3..cc7972a103dc 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -1759,7 +1759,8 @@ int m_can_class_get_clocks(struct m_can_classdev *cdev)
}
EXPORT_SYMBOL_GPL(m_can_class_get_clocks);
-struct m_can_classdev *m_can_class_allocate_dev(struct device *dev)
+struct m_can_classdev *m_can_class_allocate_dev(struct device *dev,
+ int sizeof_priv)
{
struct m_can_classdev *class_dev = NULL;
u32 mram_config_vals[MRAM_CFG_LEN];
@@ -1782,7 +1783,7 @@ struct m_can_classdev *m_can_class_allocate_dev(struct device *dev)
tx_fifo_size = mram_config_vals[7];
/* allocate the m_can device */
- net_dev = alloc_candev(sizeof(*class_dev), tx_fifo_size);
+ net_dev = alloc_candev(sizeof_priv, tx_fifo_size);
if (!net_dev) {
dev_err(dev, "Failed to allocate CAN device");
goto out;
diff --git a/drivers/net/can/m_can/m_can.h b/drivers/net/can/m_can/m_can.h
index 3994e20249f8..3fda84cef351 100644
--- a/drivers/net/can/m_can/m_can.h
+++ b/drivers/net/can/m_can/m_can.h
@@ -86,8 +86,6 @@ struct m_can_classdev {
struct m_can_ops *ops;
- void *device_data;
-
int version;
u32 irqstatus;
@@ -97,7 +95,7 @@ struct m_can_classdev {
struct mram_cfg mcfg[MRAM_CFG_NUM];
};
-struct m_can_classdev *m_can_class_allocate_dev(struct device *dev);
+struct m_can_classdev *m_can_class_allocate_dev(struct device *dev, int sizeof_priv);
void m_can_class_free_dev(struct net_device *net);
int m_can_class_register(struct m_can_classdev *cdev);
void m_can_class_unregister(struct m_can_classdev *cdev);
diff --git a/drivers/net/can/m_can/m_can_pci.c b/drivers/net/can/m_can/m_can_pci.c
index 04010ee0407c..ebfbef25e3f9 100644
--- a/drivers/net/can/m_can/m_can_pci.c
+++ b/drivers/net/can/m_can/m_can_pci.c
@@ -22,26 +22,33 @@
#define CTL_CSR_INT_CTL_OFFSET 0x508
struct m_can_pci_priv {
+ struct m_can_classdev cdev;
+
void __iomem *base;
};
+static inline struct m_can_pci_priv *cdev_to_priv(struct m_can_classdev *cdev)
+{
+ return container_of(cdev, struct m_can_pci_priv, cdev);
+}
+
static u32 iomap_read_reg(struct m_can_classdev *cdev, int reg)
{
- struct m_can_pci_priv *priv = cdev->device_data;
+ struct m_can_pci_priv *priv = cdev_to_priv(cdev);
return readl(priv->base + reg);
}
static u32 iomap_read_fifo(struct m_can_classdev *cdev, int offset)
{
- struct m_can_pci_priv *priv = cdev->device_data;
+ struct m_can_pci_priv *priv = cdev_to_priv(cdev);
return readl(priv->base + offset);
}
static int iomap_write_reg(struct m_can_classdev *cdev, int reg, int val)
{
- struct m_can_pci_priv *priv = cdev->device_data;
+ struct m_can_pci_priv *priv = cdev_to_priv(cdev);
writel(val, priv->base + reg);
@@ -50,7 +57,7 @@ static int iomap_write_reg(struct m_can_classdev *cdev, int reg, int val)
static int iomap_write_fifo(struct m_can_classdev *cdev, int offset, int val)
{
- struct m_can_pci_priv *priv = cdev->device_data;
+ struct m_can_pci_priv *priv = cdev_to_priv(cdev);
writel(val, priv->base + offset);
@@ -89,21 +96,19 @@ static int m_can_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
return -ENOMEM;
}
- priv = devm_kzalloc(&pci->dev, sizeof(*priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
-
- mcan_class = m_can_class_allocate_dev(&pci->dev);
+ mcan_class = m_can_class_allocate_dev(&pci->dev,
+ sizeof(struct m_can_pci_priv));
if (!mcan_class)
return -ENOMEM;
+ priv = cdev_to_priv(mcan_class);
+
priv->base = base;
ret = pci_alloc_irq_vectors(pci, 1, 1, PCI_IRQ_ALL_TYPES);
if (ret < 0)
return ret;
- mcan_class->device_data = priv;
mcan_class->dev = &pci->dev;
mcan_class->net->irq = pci_irq_vector(pci, 0);
mcan_class->pm_clock_support = 1;
@@ -135,7 +140,7 @@ static void m_can_pci_remove(struct pci_dev *pci)
{
struct net_device *dev = pci_get_drvdata(pci);
struct m_can_classdev *mcan_class = netdev_priv(dev);
- struct m_can_pci_priv *priv = mcan_class->device_data;
+ struct m_can_pci_priv *priv = cdev_to_priv(mcan_class);
pm_runtime_forbid(&pci->dev);
pm_runtime_get_noresume(&pci->dev);
diff --git a/drivers/net/can/m_can/m_can_platform.c b/drivers/net/can/m_can/m_can_platform.c
index 36ef791da388..5758d25e42c8 100644
--- a/drivers/net/can/m_can/m_can_platform.c
+++ b/drivers/net/can/m_can/m_can_platform.c
@@ -10,27 +10,34 @@
#include "m_can.h"
struct m_can_plat_priv {
+ struct m_can_classdev cdev;
+
void __iomem *base;
void __iomem *mram_base;
};
+static inline struct m_can_plat_priv *cdev_to_priv(struct m_can_classdev *cdev)
+{
+ return container_of(cdev, struct m_can_plat_priv, cdev);
+}
+
static u32 iomap_read_reg(struct m_can_classdev *cdev, int reg)
{
- struct m_can_plat_priv *priv = cdev->device_data;
+ struct m_can_plat_priv *priv = cdev_to_priv(cdev);
return readl(priv->base + reg);
}
static u32 iomap_read_fifo(struct m_can_classdev *cdev, int offset)
{
- struct m_can_plat_priv *priv = cdev->device_data;
+ struct m_can_plat_priv *priv = cdev_to_priv(cdev);
return readl(priv->mram_base + offset);
}
static int iomap_write_reg(struct m_can_classdev *cdev, int reg, int val)
{
- struct m_can_plat_priv *priv = cdev->device_data;
+ struct m_can_plat_priv *priv = cdev_to_priv(cdev);
writel(val, priv->base + reg);
@@ -39,7 +46,7 @@ static int iomap_write_reg(struct m_can_classdev *cdev, int reg, int val)
static int iomap_write_fifo(struct m_can_classdev *cdev, int offset, int val)
{
- struct m_can_plat_priv *priv = cdev->device_data;
+ struct m_can_plat_priv *priv = cdev_to_priv(cdev);
writel(val, priv->mram_base + offset);
@@ -62,17 +69,12 @@ static int m_can_plat_probe(struct platform_device *pdev)
void __iomem *mram_addr;
int irq, ret = 0;
- mcan_class = m_can_class_allocate_dev(&pdev->dev);
+ mcan_class = m_can_class_allocate_dev(&pdev->dev,
+ sizeof(struct m_can_plat_priv));
if (!mcan_class)
return -ENOMEM;
- priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
- if (!priv) {
- ret = -ENOMEM;
- goto probe_fail;
- }
-
- mcan_class->device_data = priv;
+ priv = cdev_to_priv(mcan_class);
ret = m_can_class_get_clocks(mcan_class);
if (ret)
diff --git a/drivers/net/can/m_can/tcan4x5x.c b/drivers/net/can/m_can/tcan4x5x.c
index a0fecc3fb829..24c737c4fc44 100644
--- a/drivers/net/can/m_can/tcan4x5x.c
+++ b/drivers/net/can/m_can/tcan4x5x.c
@@ -114,17 +114,23 @@
#define TCAN4X5X_WD_6_S_TIMER (BIT(28) | BIT(29))
struct tcan4x5x_priv {
+ struct m_can_classdev cdev;
+
struct regmap *regmap;
struct spi_device *spi;
- struct m_can_classdev *mcan_dev;
-
struct gpio_desc *reset_gpio;
struct gpio_desc *device_wake_gpio;
struct gpio_desc *device_state_gpio;
struct regulator *power;
};
+static inline struct tcan4x5x_priv *cdev_to_priv(struct m_can_classdev *cdev)
+{
+ return container_of(cdev, struct tcan4x5x_priv, cdev);
+
+}
+
static struct can_bittiming_const tcan4x5x_bittiming_const = {
.name = DEVICE_NAME,
.tseg1_min = 2,
@@ -253,7 +259,7 @@ static struct regmap_bus tcan4x5x_bus = {
static u32 tcan4x5x_read_reg(struct m_can_classdev *cdev, int reg)
{
- struct tcan4x5x_priv *priv = cdev->device_data;
+ struct tcan4x5x_priv *priv = cdev_to_priv(cdev);
u32 val;
regmap_read(priv->regmap, TCAN4X5X_MCAN_OFFSET + reg, &val);
@@ -263,7 +269,7 @@ static u32 tcan4x5x_read_reg(struct m_can_classdev *cdev, int reg)
static u32 tcan4x5x_read_fifo(struct m_can_classdev *cdev, int addr_offset)
{
- struct tcan4x5x_priv *priv = cdev->device_data;
+ struct tcan4x5x_priv *priv = cdev_to_priv(cdev);
u32 val;
regmap_read(priv->regmap, TCAN4X5X_MRAM_START + addr_offset, &val);
@@ -273,7 +279,7 @@ static u32 tcan4x5x_read_fifo(struct m_can_classdev *cdev, int addr_offset)
static int tcan4x5x_write_reg(struct m_can_classdev *cdev, int reg, int val)
{
- struct tcan4x5x_priv *priv = cdev->device_data;
+ struct tcan4x5x_priv *priv = cdev_to_priv(cdev);
return regmap_write(priv->regmap, TCAN4X5X_MCAN_OFFSET + reg, val);
}
@@ -281,7 +287,7 @@ static int tcan4x5x_write_reg(struct m_can_classdev *cdev, int reg, int val)
static int tcan4x5x_write_fifo(struct m_can_classdev *cdev,
int addr_offset, int val)
{
- struct tcan4x5x_priv *priv = cdev->device_data;
+ struct tcan4x5x_priv *priv = cdev_to_priv(cdev);
return regmap_write(priv->regmap, TCAN4X5X_MRAM_START + addr_offset, val);
}
@@ -300,7 +306,7 @@ static int tcan4x5x_power_enable(struct regulator *reg, int enable)
static int tcan4x5x_write_tcan_reg(struct m_can_classdev *cdev,
int reg, int val)
{
- struct tcan4x5x_priv *priv = cdev->device_data;
+ struct tcan4x5x_priv *priv = cdev_to_priv(cdev);
return regmap_write(priv->regmap, reg, val);
}
@@ -330,7 +336,7 @@ static int tcan4x5x_clear_interrupts(struct m_can_classdev *cdev)
static int tcan4x5x_init(struct m_can_classdev *cdev)
{
- struct tcan4x5x_priv *tcan4x5x = cdev->device_data;
+ struct tcan4x5x_priv *tcan4x5x = cdev_to_priv(cdev);
int ret;
tcan4x5x_check_wake(tcan4x5x);
@@ -357,7 +363,7 @@ static int tcan4x5x_init(struct m_can_classdev *cdev)
static int tcan4x5x_disable_wake(struct m_can_classdev *cdev)
{
- struct tcan4x5x_priv *tcan4x5x = cdev->device_data;
+ struct tcan4x5x_priv *tcan4x5x = cdev_to_priv(cdev);
return regmap_update_bits(tcan4x5x->regmap, TCAN4X5X_CONFIG,
TCAN4X5X_DISABLE_WAKE_MSK, 0x00);
@@ -365,7 +371,7 @@ static int tcan4x5x_disable_wake(struct m_can_classdev *cdev)
static int tcan4x5x_disable_state(struct m_can_classdev *cdev)
{
- struct tcan4x5x_priv *tcan4x5x = cdev->device_data;
+ struct tcan4x5x_priv *tcan4x5x = cdev_to_priv(cdev);
return regmap_update_bits(tcan4x5x->regmap, TCAN4X5X_CONFIG,
TCAN4X5X_DISABLE_INH_MSK, 0x01);
@@ -373,7 +379,7 @@ static int tcan4x5x_disable_state(struct m_can_classdev *cdev)
static int tcan4x5x_get_gpios(struct m_can_classdev *cdev)
{
- struct tcan4x5x_priv *tcan4x5x = cdev->device_data;
+ struct tcan4x5x_priv *tcan4x5x = cdev_to_priv(cdev);
int ret;
tcan4x5x->device_wake_gpio = devm_gpiod_get(cdev->dev, "device-wake",
@@ -427,15 +433,12 @@ static int tcan4x5x_can_probe(struct spi_device *spi)
struct m_can_classdev *mcan_class;
int freq, ret;
- mcan_class = m_can_class_allocate_dev(&spi->dev);
+ mcan_class = m_can_class_allocate_dev(&spi->dev,
+ sizeof(struct tcan4x5x_priv));
if (!mcan_class)
return -ENOMEM;
- priv = devm_kzalloc(&spi->dev, sizeof(*priv), GFP_KERNEL);
- if (!priv) {
- ret = -ENOMEM;
- goto out_m_can_class_free_dev;
- }
+ priv = cdev_to_priv(mcan_class);
priv->power = devm_regulator_get_optional(&spi->dev, "vsup");
if (PTR_ERR(priv->power) == -EPROBE_DEFER) {
@@ -445,8 +448,6 @@ static int tcan4x5x_can_probe(struct spi_device *spi)
priv->power = NULL;
}
- mcan_class->device_data = priv;
-
m_can_class_get_clocks(mcan_class);
if (IS_ERR(mcan_class->cclk)) {
dev_err(&spi->dev, "no CAN clock source defined\n");
@@ -462,7 +463,6 @@ static int tcan4x5x_can_probe(struct spi_device *spi)
}
priv->spi = spi;
- priv->mcan_dev = mcan_class;
mcan_class->pm_clock_support = 0;
mcan_class->can.clock.freq = freq;
@@ -518,11 +518,11 @@ static int tcan4x5x_can_remove(struct spi_device *spi)
{
struct tcan4x5x_priv *priv = spi_get_drvdata(spi);
- m_can_class_unregister(priv->mcan_dev);
+ m_can_class_unregister(&priv->cdev);
tcan4x5x_power_enable(priv->power, 0);
- m_can_class_free_dev(priv->mcan_dev->net);
+ m_can_class_free_dev(priv->cdev.net);
return 0;
}
--
2.29.2
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