diff options
author | Wolfram Sang <wsa@kernel.org> | 2020-05-20 15:27:45 +0200 |
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committer | Wolfram Sang <wsa@kernel.org> | 2020-05-20 15:27:45 +0200 |
commit | f89c326dcaa0cb8c3af7764e75eeed4e3f3c879a (patch) | |
tree | 31a5967da1f04180a1a922258f6947ad17255ee8 /drivers/i2c/busses | |
parent | 6fe12cdbcfe35ad4726a619a9546822d34fc934c (diff) | |
parent | efa7fb4c6c8e4171fd29a5935a9dc7a28e363278 (diff) | |
download | linux-f89c326dcaa0cb8c3af7764e75eeed4e3f3c879a.tar.bz2 |
Merge branch 'i2c/for-current-fixed' into i2c/for-5.8
Diffstat (limited to 'drivers/i2c/busses')
-rw-r--r-- | drivers/i2c/busses/i2c-altera.c | 19 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-amd-mp2-pci.c | 2 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-aspeed.c | 5 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-at91-master.c | 20 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-bcm-iproc.c | 3 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-designware-platdrv.c | 14 |
6 files changed, 48 insertions, 15 deletions
diff --git a/drivers/i2c/busses/i2c-altera.c b/drivers/i2c/busses/i2c-altera.c index 027faabe3d04..70c81f88b293 100644 --- a/drivers/i2c/busses/i2c-altera.c +++ b/drivers/i2c/busses/i2c-altera.c @@ -70,6 +70,7 @@ * @isr_mask: cached copy of local ISR enables. * @isr_status: cached copy of local ISR status. * @lock: spinlock for IRQ synchronization. + * @isr_mutex: mutex for IRQ thread. */ struct altr_i2c_dev { void __iomem *base; @@ -86,6 +87,7 @@ struct altr_i2c_dev { u32 isr_mask; u32 isr_status; spinlock_t lock; /* IRQ synchronization */ + struct mutex isr_mutex; }; static void @@ -245,10 +247,11 @@ static irqreturn_t altr_i2c_isr(int irq, void *_dev) struct altr_i2c_dev *idev = _dev; u32 status = idev->isr_status; + mutex_lock(&idev->isr_mutex); if (!idev->msg) { dev_warn(idev->dev, "unexpected interrupt\n"); altr_i2c_int_clear(idev, ALTR_I2C_ALL_IRQ); - return IRQ_HANDLED; + goto out; } read = (idev->msg->flags & I2C_M_RD) != 0; @@ -301,6 +304,8 @@ static irqreturn_t altr_i2c_isr(int irq, void *_dev) complete(&idev->msg_complete); dev_dbg(idev->dev, "Message Complete\n"); } +out: + mutex_unlock(&idev->isr_mutex); return IRQ_HANDLED; } @@ -312,6 +317,7 @@ static int altr_i2c_xfer_msg(struct altr_i2c_dev *idev, struct i2c_msg *msg) u32 value; u8 addr = i2c_8bit_addr_from_msg(msg); + mutex_lock(&idev->isr_mutex); idev->msg = msg; idev->msg_len = msg->len; idev->buf = msg->buf; @@ -336,6 +342,7 @@ static int altr_i2c_xfer_msg(struct altr_i2c_dev *idev, struct i2c_msg *msg) altr_i2c_int_enable(idev, imask, true); altr_i2c_fill_tx_fifo(idev); } + mutex_unlock(&idev->isr_mutex); time_left = wait_for_completion_timeout(&idev->msg_complete, ALTR_I2C_XFER_TIMEOUT); @@ -383,7 +390,6 @@ static int altr_i2c_probe(struct platform_device *pdev) { struct altr_i2c_dev *idev = NULL; int irq, ret; - u32 val; idev = devm_kzalloc(&pdev->dev, sizeof(*idev), GFP_KERNEL); if (!idev) @@ -406,18 +412,19 @@ static int altr_i2c_probe(struct platform_device *pdev) idev->dev = &pdev->dev; init_completion(&idev->msg_complete); spin_lock_init(&idev->lock); + mutex_init(&idev->isr_mutex); - val = device_property_read_u32(idev->dev, "fifo-size", + ret = device_property_read_u32(idev->dev, "fifo-size", &idev->fifo_size); - if (val) { + if (ret) { dev_err(&pdev->dev, "FIFO size set to default of %d\n", ALTR_I2C_DFLT_FIFO_SZ); idev->fifo_size = ALTR_I2C_DFLT_FIFO_SZ; } - val = device_property_read_u32(idev->dev, "clock-frequency", + ret = device_property_read_u32(idev->dev, "clock-frequency", &idev->bus_clk_rate); - if (val) { + if (ret) { dev_err(&pdev->dev, "Default to 100kHz\n"); idev->bus_clk_rate = I2C_MAX_STANDARD_MODE_FREQ; /* default clock rate */ } diff --git a/drivers/i2c/busses/i2c-amd-mp2-pci.c b/drivers/i2c/busses/i2c-amd-mp2-pci.c index 5e4800d72e00..cd3fd5ee5f65 100644 --- a/drivers/i2c/busses/i2c-amd-mp2-pci.c +++ b/drivers/i2c/busses/i2c-amd-mp2-pci.c @@ -349,12 +349,12 @@ static int amd_mp2_pci_probe(struct pci_dev *pci_dev, if (!privdata) return -ENOMEM; + privdata->pci_dev = pci_dev; rc = amd_mp2_pci_init(privdata, pci_dev); if (rc) return rc; mutex_init(&privdata->c2p_lock); - privdata->pci_dev = pci_dev; pm_runtime_set_autosuspend_delay(&pci_dev->dev, 1000); pm_runtime_use_autosuspend(&pci_dev->dev); diff --git a/drivers/i2c/busses/i2c-aspeed.c b/drivers/i2c/busses/i2c-aspeed.c index 07c1993274c5..f51702d86a90 100644 --- a/drivers/i2c/busses/i2c-aspeed.c +++ b/drivers/i2c/busses/i2c-aspeed.c @@ -603,6 +603,7 @@ static irqreturn_t aspeed_i2c_bus_irq(int irq, void *dev_id) /* Ack all interrupts except for Rx done */ writel(irq_received & ~ASPEED_I2CD_INTR_RX_DONE, bus->base + ASPEED_I2C_INTR_STS_REG); + readl(bus->base + ASPEED_I2C_INTR_STS_REG); irq_remaining = irq_received; #if IS_ENABLED(CONFIG_I2C_SLAVE) @@ -645,9 +646,11 @@ static irqreturn_t aspeed_i2c_bus_irq(int irq, void *dev_id) irq_received, irq_handled); /* Ack Rx done */ - if (irq_received & ASPEED_I2CD_INTR_RX_DONE) + if (irq_received & ASPEED_I2CD_INTR_RX_DONE) { writel(ASPEED_I2CD_INTR_RX_DONE, bus->base + ASPEED_I2C_INTR_STS_REG); + readl(bus->base + ASPEED_I2C_INTR_STS_REG); + } spin_unlock(&bus->lock); return irq_remaining ? IRQ_NONE : IRQ_HANDLED; } diff --git a/drivers/i2c/busses/i2c-at91-master.c b/drivers/i2c/busses/i2c-at91-master.c index 776e95962ab6..363d540a8345 100644 --- a/drivers/i2c/busses/i2c-at91-master.c +++ b/drivers/i2c/busses/i2c-at91-master.c @@ -845,6 +845,18 @@ static int at91_init_twi_recovery_gpio(struct platform_device *pdev, PINCTRL_STATE_DEFAULT); dev->pinctrl_pins_gpio = pinctrl_lookup_state(dev->pinctrl, "gpio"); + if (IS_ERR(dev->pinctrl_pins_default) || + IS_ERR(dev->pinctrl_pins_gpio)) { + dev_info(&pdev->dev, "pinctrl states incomplete for recovery\n"); + return -EINVAL; + } + + /* + * pins will be taken as GPIO, so we might as well inform pinctrl about + * this and move the state to GPIO + */ + pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_gpio); + rinfo->sda_gpiod = devm_gpiod_get(&pdev->dev, "sda", GPIOD_IN); if (PTR_ERR(rinfo->sda_gpiod) == -EPROBE_DEFER) return -EPROBE_DEFER; @@ -855,9 +867,7 @@ static int at91_init_twi_recovery_gpio(struct platform_device *pdev, return -EPROBE_DEFER; if (IS_ERR(rinfo->sda_gpiod) || - IS_ERR(rinfo->scl_gpiod) || - IS_ERR(dev->pinctrl_pins_default) || - IS_ERR(dev->pinctrl_pins_gpio)) { + IS_ERR(rinfo->scl_gpiod)) { dev_info(&pdev->dev, "recovery information incomplete\n"); if (!IS_ERR(rinfo->sda_gpiod)) { gpiod_put(rinfo->sda_gpiod); @@ -867,9 +877,13 @@ static int at91_init_twi_recovery_gpio(struct platform_device *pdev, gpiod_put(rinfo->scl_gpiod); rinfo->scl_gpiod = NULL; } + pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_default); return -EINVAL; } + /* change the state of the pins back to their default state */ + pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_default); + dev_info(&pdev->dev, "using scl, sda for recovery\n"); rinfo->prepare_recovery = at91_prepare_twi_recovery; diff --git a/drivers/i2c/busses/i2c-bcm-iproc.c b/drivers/i2c/busses/i2c-bcm-iproc.c index 2d11f4d3f5c1..8a3c98866fb7 100644 --- a/drivers/i2c/busses/i2c-bcm-iproc.c +++ b/drivers/i2c/busses/i2c-bcm-iproc.c @@ -361,6 +361,9 @@ static bool bcm_iproc_i2c_slave_isr(struct bcm_iproc_i2c_dev *iproc_i2c, value = (u8)((val >> S_RX_DATA_SHIFT) & S_RX_DATA_MASK); i2c_slave_event(iproc_i2c->slave, I2C_SLAVE_WRITE_RECEIVED, &value); + if (rx_status == I2C_SLAVE_RX_END) + i2c_slave_event(iproc_i2c->slave, + I2C_SLAVE_STOP, &value); } } else if (status & BIT(IS_S_TX_UNDERRUN_SHIFT)) { /* Master read other than start */ diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index c6f04449036a..01db634461b6 100644 --- a/drivers/i2c/busses/i2c-designware-platdrv.c +++ b/drivers/i2c/busses/i2c-designware-platdrv.c @@ -314,10 +314,16 @@ static int dw_i2c_plat_probe(struct platform_device *pdev) adap->dev.of_node = pdev->dev.of_node; adap->nr = -1; - dev_pm_set_driver_flags(&pdev->dev, - DPM_FLAG_SMART_PREPARE | - DPM_FLAG_SMART_SUSPEND | - DPM_FLAG_LEAVE_SUSPENDED); + if (dev->flags & ACCESS_NO_IRQ_SUSPEND) { + dev_pm_set_driver_flags(&pdev->dev, + DPM_FLAG_SMART_PREPARE | + DPM_FLAG_LEAVE_SUSPENDED); + } else { + dev_pm_set_driver_flags(&pdev->dev, + DPM_FLAG_SMART_PREPARE | + DPM_FLAG_SMART_SUSPEND | + DPM_FLAG_LEAVE_SUSPENDED); + } /* The code below assumes runtime PM to be disabled. */ WARN_ON(pm_runtime_enabled(&pdev->dev)); |