Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang: "I2C has one revert because of a regression, two fixes for tiny race windows (which we were not able to trigger), a MAINTAINERS addition, and a SPDX fix" * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: i2c: stm32: Use the correct style for SPDX License Identifier i2c: emev2: avoid race when unregistering slave client i2c: rcar: avoid race when unregistering slave client MAINTAINERS: i2c-imx: take over maintainership Revert "i2c: imx: improve the error handling in i2c_imx_dma_request()"alistair/sunxi64-5.4-dsi
Linus Torvalds
commit
05c5253269
|
|
@ -6441,6 +6441,14 @@ S: Maintained
|
|||
F: drivers/perf/fsl_imx8_ddr_perf.c
|
||||
F: Documentation/devicetree/bindings/perf/fsl-imx-ddr.txt
|
||||
|
||||
FREESCALE IMX I2C DRIVER
|
||||
M: Oleksij Rempel <o.rempel@pengutronix.de>
|
||||
R: Pengutronix Kernel Team <kernel@pengutronix.de>
|
||||
L: linux-i2c@vger.kernel.org
|
||||
S: Maintained
|
||||
F: drivers/i2c/busses/i2c-imx.c
|
||||
F: Documentation/devicetree/bindings/i2c/i2c-imx.txt
|
||||
|
||||
FREESCALE IMX LPI2C DRIVER
|
||||
M: Dong Aisheng <aisheng.dong@nxp.com>
|
||||
L: linux-i2c@vger.kernel.org
|
||||
|
|
|
|||
|
|
@ -69,6 +69,7 @@ struct em_i2c_device {
|
|||
struct completion msg_done;
|
||||
struct clk *sclk;
|
||||
struct i2c_client *slave;
|
||||
int irq;
|
||||
};
|
||||
|
||||
static inline void em_clear_set_bit(struct em_i2c_device *priv, u8 clear, u8 set, u8 reg)
|
||||
|
|
@ -339,6 +340,12 @@ static int em_i2c_unreg_slave(struct i2c_client *slave)
|
|||
|
||||
writeb(0, priv->base + I2C_OFS_SVA0);
|
||||
|
||||
/*
|
||||
* Wait for interrupt to finish. New slave irqs cannot happen because we
|
||||
* cleared the slave address and, thus, only extension codes will be
|
||||
* detected which do not use the slave ptr.
|
||||
*/
|
||||
synchronize_irq(priv->irq);
|
||||
priv->slave = NULL;
|
||||
|
||||
return 0;
|
||||
|
|
@ -355,7 +362,7 @@ static int em_i2c_probe(struct platform_device *pdev)
|
|||
{
|
||||
struct em_i2c_device *priv;
|
||||
struct resource *r;
|
||||
int irq, ret;
|
||||
int ret;
|
||||
|
||||
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
|
||||
if (!priv)
|
||||
|
|
@ -390,8 +397,8 @@ static int em_i2c_probe(struct platform_device *pdev)
|
|||
|
||||
em_i2c_reset(&priv->adap);
|
||||
|
||||
irq = platform_get_irq(pdev, 0);
|
||||
ret = devm_request_irq(&pdev->dev, irq, em_i2c_irq_handler, 0,
|
||||
priv->irq = platform_get_irq(pdev, 0);
|
||||
ret = devm_request_irq(&pdev->dev, priv->irq, em_i2c_irq_handler, 0,
|
||||
"em_i2c", priv);
|
||||
if (ret)
|
||||
goto err_clk;
|
||||
|
|
@ -401,7 +408,8 @@ static int em_i2c_probe(struct platform_device *pdev)
|
|||
if (ret)
|
||||
goto err_clk;
|
||||
|
||||
dev_info(&pdev->dev, "Added i2c controller %d, irq %d\n", priv->adap.nr, irq);
|
||||
dev_info(&pdev->dev, "Added i2c controller %d, irq %d\n", priv->adap.nr,
|
||||
priv->irq);
|
||||
|
||||
return 0;
|
||||
|
||||
|
|
|
|||
|
|
@ -273,8 +273,8 @@ static inline unsigned char imx_i2c_read_reg(struct imx_i2c_struct *i2c_imx,
|
|||
}
|
||||
|
||||
/* Functions for DMA support */
|
||||
static int i2c_imx_dma_request(struct imx_i2c_struct *i2c_imx,
|
||||
dma_addr_t phy_addr)
|
||||
static void i2c_imx_dma_request(struct imx_i2c_struct *i2c_imx,
|
||||
dma_addr_t phy_addr)
|
||||
{
|
||||
struct imx_i2c_dma *dma;
|
||||
struct dma_slave_config dma_sconfig;
|
||||
|
|
@ -283,7 +283,7 @@ static int i2c_imx_dma_request(struct imx_i2c_struct *i2c_imx,
|
|||
|
||||
dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL);
|
||||
if (!dma)
|
||||
return -ENOMEM;
|
||||
return;
|
||||
|
||||
dma->chan_tx = dma_request_chan(dev, "tx");
|
||||
if (IS_ERR(dma->chan_tx)) {
|
||||
|
|
@ -328,7 +328,7 @@ static int i2c_imx_dma_request(struct imx_i2c_struct *i2c_imx,
|
|||
dev_info(dev, "using %s (tx) and %s (rx) for DMA transfers\n",
|
||||
dma_chan_name(dma->chan_tx), dma_chan_name(dma->chan_rx));
|
||||
|
||||
return 0;
|
||||
return;
|
||||
|
||||
fail_rx:
|
||||
dma_release_channel(dma->chan_rx);
|
||||
|
|
@ -336,8 +336,6 @@ fail_tx:
|
|||
dma_release_channel(dma->chan_tx);
|
||||
fail_al:
|
||||
devm_kfree(dev, dma);
|
||||
/* return successfully if there is no dma support */
|
||||
return ret == -ENODEV ? 0 : ret;
|
||||
}
|
||||
|
||||
static void i2c_imx_dma_callback(void *arg)
|
||||
|
|
@ -1165,17 +1163,13 @@ static int i2c_imx_probe(struct platform_device *pdev)
|
|||
dev_dbg(&i2c_imx->adapter.dev, "device resources: %pR\n", res);
|
||||
dev_dbg(&i2c_imx->adapter.dev, "adapter name: \"%s\"\n",
|
||||
i2c_imx->adapter.name);
|
||||
dev_info(&i2c_imx->adapter.dev, "IMX I2C adapter registered\n");
|
||||
|
||||
/* Init DMA config if supported */
|
||||
ret = i2c_imx_dma_request(i2c_imx, phy_addr);
|
||||
if (ret < 0)
|
||||
goto del_adapter;
|
||||
i2c_imx_dma_request(i2c_imx, phy_addr);
|
||||
|
||||
dev_info(&i2c_imx->adapter.dev, "IMX I2C adapter registered\n");
|
||||
return 0; /* Return OK */
|
||||
|
||||
del_adapter:
|
||||
i2c_del_adapter(&i2c_imx->adapter);
|
||||
clk_notifier_unregister:
|
||||
clk_notifier_unregister(i2c_imx->clk, &i2c_imx->clk_change_nb);
|
||||
rpm_disable:
|
||||
|
|
|
|||
|
|
@ -139,6 +139,7 @@ struct rcar_i2c_priv {
|
|||
enum dma_data_direction dma_direction;
|
||||
|
||||
struct reset_control *rstc;
|
||||
int irq;
|
||||
};
|
||||
|
||||
#define rcar_i2c_priv_to_dev(p) ((p)->adap.dev.parent)
|
||||
|
|
@ -861,9 +862,11 @@ static int rcar_unreg_slave(struct i2c_client *slave)
|
|||
|
||||
WARN_ON(!priv->slave);
|
||||
|
||||
/* disable irqs and ensure none is running before clearing ptr */
|
||||
rcar_i2c_write(priv, ICSIER, 0);
|
||||
rcar_i2c_write(priv, ICSCR, 0);
|
||||
|
||||
synchronize_irq(priv->irq);
|
||||
priv->slave = NULL;
|
||||
|
||||
pm_runtime_put(rcar_i2c_priv_to_dev(priv));
|
||||
|
|
@ -918,7 +921,7 @@ static int rcar_i2c_probe(struct platform_device *pdev)
|
|||
struct i2c_adapter *adap;
|
||||
struct device *dev = &pdev->dev;
|
||||
struct i2c_timings i2c_t;
|
||||
int irq, ret;
|
||||
int ret;
|
||||
|
||||
/* Otherwise logic will break because some bytes must always use PIO */
|
||||
BUILD_BUG_ON_MSG(RCAR_MIN_DMA_LEN < 3, "Invalid min DMA length");
|
||||
|
|
@ -984,10 +987,10 @@ static int rcar_i2c_probe(struct platform_device *pdev)
|
|||
pm_runtime_put(dev);
|
||||
|
||||
|
||||
irq = platform_get_irq(pdev, 0);
|
||||
ret = devm_request_irq(dev, irq, rcar_i2c_irq, 0, dev_name(dev), priv);
|
||||
priv->irq = platform_get_irq(pdev, 0);
|
||||
ret = devm_request_irq(dev, priv->irq, rcar_i2c_irq, 0, dev_name(dev), priv);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "cannot get irq %d\n", irq);
|
||||
dev_err(dev, "cannot get irq %d\n", priv->irq);
|
||||
goto out_pm_disable;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -1,4 +1,4 @@
|
|||
// SPDX-License-Identifier: GPL-2.0
|
||||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
/*
|
||||
* i2c-stm32.h
|
||||
*
|
||||
|
|
|
|||
Loading…
Reference in New Issue