Commit 05c52532 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

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()"
parents 2f478b60 90865a3d
......@@ -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 @@ static int i2c_imx_dma_request(struct imx_i2c_struct *i2c_imx,
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;
}
......
// SPDX-License-Identifier: GPL-2.0
/* SPDX-License-Identifier: GPL-2.0 */
/*
* i2c-stm32.h
*
......
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