diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-07 14:12:21 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-07 14:12:21 -0700 |
commit | 87840a2b7e048018d18d60bdac5c09224de85370 (patch) | |
tree | 87e9f8a2317e39358f5ea189d79ef2158de5faf8 /drivers/i2c | |
parent | 2ab704a47e0f27df758840a589aec3298dbb98dd (diff) | |
parent | 662786a5429c3a992c6f884a647ee32424822358 (diff) |
Merge branch 'i2c/for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c updates from Wolfram Sang:
"Here is the 4.9 pull request from I2C including:
- centralized error messages when registering to the core
- improved lockdep annotations to prevent false positives
- DT support for muxes, gates, and arbitrators
- bus speeds can now be obtained from ACPI
- i2c-octeon got refactored and now supports ThunderX SoCs, too
- i2c-tegra and i2c-designware got a bigger bunch of updates
- a couple of standard driver fixes and improvements"
* 'i2c/for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (71 commits)
i2c: axxia: disable clks in case of failure in probe
i2c: octeon: thunderx: Limit register access retries
i2c: uniphier-f: fix misdetection of incomplete STOP condition
gpio: pca953x: variable 'id' was used twice
i2c: i801: Add support for Kaby Lake PCH-H
gpio: pca953x: fix an incorrect lockdep warning
i2c: add a warning to i2c_adapter_depth()
lockdep: make MAX_LOCKDEP_SUBCLASSES unconditionally visible
i2c: export i2c_adapter_depth()
i2c: rk3x: Fix variable 'min_total_ns' unused warning
i2c: rk3x: Fix sparse warning
i2c / ACPI: Do not touch an I2C device if it belongs to another adapter
i2c: octeon: Fix high-level controller status check
i2c: octeon: Avoid sending STOP during recovery
i2c: octeon: Fix set SCL recovery function
i2c: rcar: add support for r8a7796 (R-Car M3-W)
i2c: imx: make bus recovery through pinctrl optional
i2c: meson: add gxbb compatible string
i2c: uniphier-f: set the adapter to master mode when probing
i2c: uniphier-f: avoid WARN_ON() of clk_disable() in failure path
...
Diffstat (limited to 'drivers/i2c')
68 files changed, 1904 insertions, 1296 deletions
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig index 5c3993b26129..6d94e2ec5b4f 100644 --- a/drivers/i2c/busses/Kconfig +++ b/drivers/i2c/busses/Kconfig @@ -836,7 +836,7 @@ config I2C_SH7760 config I2C_SH_MOBILE tristate "SuperH Mobile I2C Controller" depends on HAS_DMA - depends on SUPERH || ARCH_RENESAS || COMPILE_TEST + depends on ARCH_SHMOBILE || ARCH_RENESAS || COMPILE_TEST help If you say yes to this option, support will be included for the built-in I2C interface on the Renesas SH-Mobile processor. @@ -956,6 +956,17 @@ config I2C_OCTEON This driver can also be built as a module. If so, the module will be called i2c-octeon. +config I2C_THUNDERX + tristate "Cavium ThunderX I2C bus support" + depends on 64BIT && PCI && (ARM64 || COMPILE_TEST) + select I2C_SMBUS + help + Say yes if you want to support the I2C serial bus on Cavium + ThunderX SOC. + + This driver can also be built as a module. If so, the module + will be called i2c-thunderx. + config I2C_XILINX tristate "Xilinx I2C Controller" depends on HAS_IOMEM diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile index 37f2819b4560..29764cc20a44 100644 --- a/drivers/i2c/busses/Makefile +++ b/drivers/i2c/busses/Makefile @@ -91,7 +91,10 @@ obj-$(CONFIG_I2C_UNIPHIER) += i2c-uniphier.o obj-$(CONFIG_I2C_UNIPHIER_F) += i2c-uniphier-f.o obj-$(CONFIG_I2C_VERSATILE) += i2c-versatile.o obj-$(CONFIG_I2C_WMT) += i2c-wmt.o +i2c-octeon-objs := i2c-octeon-core.o i2c-octeon-platdrv.o obj-$(CONFIG_I2C_OCTEON) += i2c-octeon.o +i2c-thunderx-objs := i2c-octeon-core.o i2c-thunderx-pcidrv.o +obj-$(CONFIG_I2C_THUNDERX) += i2c-thunderx.o obj-$(CONFIG_I2C_XILINX) += i2c-xiic.o obj-$(CONFIG_I2C_XLR) += i2c-xlr.o obj-$(CONFIG_I2C_XLP9XX) += i2c-xlp9xx.o diff --git a/drivers/i2c/busses/i2c-amd756.c b/drivers/i2c/busses/i2c-amd756.c index 6c7113d990f8..274908cd1fde 100644 --- a/drivers/i2c/busses/i2c-amd756.c +++ b/drivers/i2c/busses/i2c-amd756.c @@ -378,11 +378,8 @@ static int amd756_probe(struct pci_dev *pdev, const struct pci_device_id *id) amd756_ioport); error = i2c_add_adapter(&amd756_smbus); - if (error) { - dev_err(&pdev->dev, - "Adapter registration failed, module not inserted\n"); + if (error) goto out_err; - } return 0; diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c index 1bb97f658b47..0b86c6173e07 100644 --- a/drivers/i2c/busses/i2c-at91.c +++ b/drivers/i2c/busses/i2c-at91.c @@ -1122,8 +1122,6 @@ static int at91_twi_probe(struct platform_device *pdev) rc = i2c_add_numbered_adapter(&dev->adapter); if (rc) { - dev_err(dev->dev, "Adapter %s registration failed\n", - dev->adapter.name); clk_disable_unprepare(dev->clk); pm_runtime_disable(dev->dev); diff --git a/drivers/i2c/busses/i2c-axxia.c b/drivers/i2c/busses/i2c-axxia.c index c335cc7852f9..4351a9343058 100644 --- a/drivers/i2c/busses/i2c-axxia.c +++ b/drivers/i2c/busses/i2c-axxia.c @@ -545,7 +545,11 @@ static int axxia_i2c_probe(struct platform_device *pdev) return ret; } - clk_prepare_enable(idev->i2c_clk); + ret = clk_prepare_enable(idev->i2c_clk); + if (ret) { + dev_err(&pdev->dev, "failed to enable clock\n"); + return ret; + } i2c_set_adapdata(&idev->adapter, idev); strlcpy(idev->adapter.name, pdev->name, sizeof(idev->adapter.name)); @@ -560,7 +564,7 @@ static int axxia_i2c_probe(struct platform_device *pdev) ret = i2c_add_adapter(&idev->adapter); if (ret) { - dev_err(&pdev->dev, "failed to add adapter\n"); + clk_disable_unprepare(idev->i2c_clk); return ret; } diff --git a/drivers/i2c/busses/i2c-bcm-iproc.c b/drivers/i2c/busses/i2c-bcm-iproc.c index 95f7cac76f89..326b3db02c48 100644 --- a/drivers/i2c/busses/i2c-bcm-iproc.c +++ b/drivers/i2c/busses/i2c-bcm-iproc.c @@ -488,13 +488,7 @@ static int bcm_iproc_i2c_probe(struct platform_device *pdev) adap->dev.parent = &pdev->dev; adap->dev.of_node = pdev->dev.of_node; - ret = i2c_add_adapter(adap); - if (ret) { - dev_err(iproc_i2c->device, "failed to add adapter\n"); - return ret; - } - - return 0; + return i2c_add_adapter(adap); } static int bcm_iproc_i2c_remove(struct platform_device *pdev) diff --git a/drivers/i2c/busses/i2c-bcm-kona.c b/drivers/i2c/busses/i2c-bcm-kona.c index 258cb9a40ab3..4e489a9d16fb 100644 --- a/drivers/i2c/busses/i2c-bcm-kona.c +++ b/drivers/i2c/busses/i2c-bcm-kona.c @@ -858,10 +858,8 @@ static int bcm_kona_i2c_probe(struct platform_device *pdev) adap->dev.of_node = pdev->dev.of_node; rc = i2c_add_adapter(adap); - if (rc) { - dev_err(dev->device, "failed to add adapter\n"); + if (rc) return rc; - } dev_info(dev->device, "device registered successfully\n"); diff --git a/drivers/i2c/busses/i2c-bfin-twi.c b/drivers/i2c/busses/i2c-bfin-twi.c index 025686d41640..29d00c4f7824 100644 --- a/drivers/i2c/busses/i2c-bfin-twi.c +++ b/drivers/i2c/busses/i2c-bfin-twi.c @@ -685,10 +685,8 @@ static int i2c_bfin_twi_probe(struct platform_device *pdev) write_CONTROL(iface, read_CONTROL(iface) | TWI_ENA); rc = i2c_add_numbered_adapter(p_adap); - if (rc < 0) { - dev_err(&pdev->dev, "Can't add i2c adapter!\n"); + if (rc < 0) goto out_error; - } platform_set_drvdata(pdev, iface); diff --git a/drivers/i2c/busses/i2c-brcmstb.c b/drivers/i2c/busses/i2c-brcmstb.c index 385b57bfcb38..0652281662a8 100644 --- a/drivers/i2c/busses/i2c-brcmstb.c +++ b/drivers/i2c/busses/i2c-brcmstb.c @@ -648,10 +648,8 @@ static int brcmstb_i2c_probe(struct platform_device *pdev) adap->dev.parent = &pdev->dev; adap->dev.of_node = pdev->dev.of_node; rc = i2c_add_adapter(adap); - if (rc) { - dev_err(dev->device, "failed to add adapter\n"); + if (rc) goto probe_errorout; - } dev_info(dev->device, "%s@%dhz registered in %s mode\n", int_name ? int_name : " ", dev->clk_freq_hz, diff --git a/drivers/i2c/busses/i2c-cadence.c b/drivers/i2c/busses/i2c-cadence.c index 3c16a2f7c673..686971263bef 100644 --- a/drivers/i2c/busses/i2c-cadence.c +++ b/drivers/i2c/busses/i2c-cadence.c @@ -963,10 +963,8 @@ static int cdns_i2c_probe(struct platform_device *pdev) } ret = i2c_add_adapter(&id->adap); - if (ret < 0) { - dev_err(&pdev->dev, "reg adap failed: %d\n", ret); + if (ret < 0) goto err_clk_dis; - } /* * Cadence I2C controller has a bug wherein it generates diff --git a/drivers/i2c/busses/i2c-cpm.c b/drivers/i2c/busses/i2c-cpm.c index ee57c1e865e2..d89bde2c5da2 100644 --- a/drivers/i2c/busses/i2c-cpm.c +++ b/drivers/i2c/busses/i2c-cpm.c @@ -665,10 +665,8 @@ static int cpm_i2c_probe(struct platform_device *ofdev) cpm->adap.nr = (data && len == 4) ? be32_to_cpup(data) : -1; result = i2c_add_numbered_adapter(&cpm->adap); - if (result < 0) { - dev_err(&ofdev->dev, "Unable to register with I2C\n"); + if (result < 0) goto out_shut; - } dev_dbg(&ofdev->dev, "hw routines for %s registered.\n", cpm->adap.name); diff --git a/drivers/i2c/busses/i2c-cros-ec-tunnel.c b/drivers/i2c/busses/i2c-cros-ec-tunnel.c index 2d5ff86398d0..9b36a7b3befd 100644 --- a/drivers/i2c/busses/i2c-cros-ec-tunnel.c +++ b/drivers/i2c/busses/i2c-cros-ec-tunnel.c @@ -281,10 +281,8 @@ static int ec_i2c_probe(struct platform_device *pdev) bus->adap.retries = I2C_MAX_RETRIES; err = i2c_add_adapter(&bus->adap); - if (err) { - dev_err(dev, "cannot register i2c adapter\n"); + if (err) return err; - } platform_set_drvdata(pdev, bus); return err; diff --git a/drivers/i2c/busses/i2c-davinci.c b/drivers/i2c/busses/i2c-davinci.c index a8bdcb5292f5..9e7ef5cf5d49 100644 --- a/drivers/i2c/busses/i2c-davinci.c +++ b/drivers/i2c/busses/i2c-davinci.c @@ -846,10 +846,8 @@ static int davinci_i2c_probe(struct platform_device *pdev) adap->nr = pdev->id; r = i2c_add_numbered_adapter(adap); - if (r) { - dev_err(&pdev->dev, "failure adding adapter\n"); + if (r) goto err_unuse_clocks; - } return 0; diff --git a/drivers/i2c/busses/i2c-designware-core.c b/drivers/i2c/busses/i2c-designware-core.c index fcd973d5131e..1fe93c43215c 100644 --- a/drivers/i2c/busses/i2c-designware-core.c +++ b/drivers/i2c/busses/i2c-designware-core.c @@ -42,6 +42,8 @@ #define DW_IC_SS_SCL_LCNT 0x18 #define DW_IC_FS_SCL_HCNT 0x1c #define DW_IC_FS_SCL_LCNT 0x20 +#define DW_IC_HS_SCL_HCNT 0x24 +#define DW_IC_HS_SCL_LCNT 0x28 #define DW_IC_INTR_STAT 0x2c #define DW_IC_INTR_MASK 0x30 #define DW_IC_RAW_INTR_STAT 0x34 @@ -89,12 +91,17 @@ DW_IC_INTR_TX_ABRT | \ DW_IC_INTR_STOP_DET) -#define DW_IC_STATUS_ACTIVITY 0x1 +#define DW_IC_STATUS_ACTIVITY 0x1 +#define DW_IC_STATUS_TFE BIT(2) +#define DW_IC_STATUS_MST_ACTIVITY BIT(5) #define DW_IC_ERR_TX_ABRT 0x1 #define DW_IC_TAR_10BITADDR_MASTER BIT(12) +#define DW_IC_COMP_PARAM_1_SPEED_MODE_HIGH (BIT(2) | BIT(3)) +#define DW_IC_COMP_PARAM_1_SPEED_MODE_MASK GENMASK(3, 2) + /* * status codes */ @@ -252,10 +259,15 @@ static u32 i2c_dw_scl_lcnt(u32 ic_clk, u32 tLOW, u32 tf, int offset) static void __i2c_dw_enable(struct dw_i2c_dev *dev, bool enable) { + dw_writel(dev, enable, DW_IC_ENABLE); +} + +static void __i2c_dw_enable_and_wait(struct dw_i2c_dev *dev, bool enable) +{ int timeout = 100; do { - dw_writel(dev, enable, DW_IC_ENABLE); + __i2c_dw_enable(dev, enable); if ((dw_readl(dev, DW_IC_ENABLE_STATUS) & 1) == enable) return; @@ -282,6 +294,28 @@ static unsigned long i2c_dw_clk_rate(struct dw_i2c_dev *dev) return dev->get_clk_rate_khz(dev); } +static int i2c_dw_acquire_lock(struct dw_i2c_dev *dev) +{ + int ret; + + if (!dev->acquire_lock) + return 0; + + ret = dev->acquire_lock(dev); + if (!ret) + return 0; + + dev_err(dev->dev, "couldn't acquire bus ownership\n"); + + return ret; +} + +static void i2c_dw_release_lock(struct dw_i2c_dev *dev) +{ + if (dev->release_lock) + dev->release_lock(dev); +} + /** * i2c_dw_init() - initialize the designware i2c master hardware * @dev: device private data @@ -293,17 +327,13 @@ static unsigned long i2c_dw_clk_rate(struct dw_i2c_dev *dev) int i2c_dw_init(struct dw_i2c_dev *dev) { u32 hcnt, lcnt; - u32 reg; + u32 reg, comp_param1; u32 sda_falling_time, scl_falling_time; int ret; - if (dev->acquire_lock) { - ret = dev->acquire_lock(dev); - if (ret) { - dev_err(dev->dev, "couldn't acquire bus ownership\n"); - return ret; - } - } + ret = i2c_dw_acquire_lock(dev); + if (ret) + return ret; reg = dw_readl(dev, DW_IC_COMP_TYPE); if (reg == ___constant_swab32(DW_IC_COMP_TYPE_VALUE)) { @@ -315,13 +345,14 @@ int i2c_dw_init(struct dw_i2c_dev *dev) } else if (reg != DW_IC_COMP_TYPE_VALUE) { dev_err(dev->dev, "Unknown Synopsys component type: " "0x%08x\n", reg); - if (dev->release_lock) - dev->release_lock(dev); + i2c_dw_release_lock(dev); return -ENODEV; } + comp_param1 = dw_readl(dev, DW_IC_COMP_PARAM_1); + /* Disable the adapter */ - __i2c_dw_enable(dev, false); + __i2c_dw_enable_and_wait(dev, false); /* set standard and fast speed deviders for high/low periods */ @@ -347,8 +378,11 @@ int i2c_dw_init(struct dw_i2c_dev *dev) dw_writel(dev, lcnt, DW_IC_SS_SCL_LCNT); dev_dbg(dev->dev, "Standard-mode HCNT:LCNT = %d:%d\n", hcnt, lcnt); - /* Set SCL timing parameters for fast-mode */ - if (dev->fs_hcnt && dev->fs_lcnt) { + /* Set SCL timing parameters for fast-mode or fast-mode plus */ + if ((dev->clk_freq == 1000000) && dev->fp_hcnt && dev->fp_lcnt) { + hcnt = dev->fp_hcnt; + lcnt = dev->fp_lcnt; + } else if (dev->fs_hcnt && dev->fs_lcnt) { hcnt = dev->fs_hcnt; lcnt = dev->fs_lcnt; } else { @@ -366,6 +400,23 @@ int i2c_dw_init(struct dw_i2c_dev *dev) dw_writel(dev, lcnt, DW_IC_FS_SCL_LCNT); dev_dbg(dev->dev, "Fast-mode HCNT:LCNT = %d:%d\n", hcnt, lcnt); + if ((dev->master_cfg & DW_IC_CON_SPEED_MASK) == + DW_IC_CON_SPEED_HIGH) { + if ((comp_param1 & DW_IC_COMP_PARAM_1_SPEED_MODE_MASK) + != DW_IC_COMP_PARAM_1_SPEED_MODE_HIGH) { + dev_err(dev->dev, "High Speed not supported!\n"); + dev->master_cfg &= ~DW_IC_CON_SPEED_MASK; + dev->master_cfg |= DW_IC_CON_SPEED_FAST; + } else if (dev->hs_hcnt && dev->hs_lcnt) { + hcnt = dev->hs_hcnt; + lcnt = dev->hs_lcnt; + dw_writel(dev, hcnt, DW_IC_HS_SCL_HCNT); + dw_writel(dev, lcnt, DW_IC_HS_SCL_LCNT); + dev_dbg(dev->dev, "HighSpeed-mode HCNT:LCNT = %d:%d\n", + hcnt, lcnt); + } + } + /* Configure SDA Hold Time if required */ reg = dw_readl(dev, DW_IC_COMP_VERSION); if (reg >= DW_IC_SDA_HOLD_MIN_VERS) { @@ -387,8 +438,8 @@ int i2c_dw_init(struct dw_i2c_dev *dev) /* configure the i2c master */ dw_writel(dev, dev->master_cfg , DW_IC_CON); - if (dev->release_lock) - dev->release_lock(dev); + i2c_dw_release_lock(dev); + return 0; } EXPORT_SYMBOL_GPL(i2c_dw_init); @@ -415,27 +466,45 @@ static int i2c_dw_wait_bus_not_busy(struct dw_i2c_dev *dev) static void i2c_dw_xfer_init(struct dw_i2c_dev *dev) { struct i2c_msg *msgs = dev->msgs; - u32 ic_con, ic_tar = 0; + u32 ic_tar = 0; + bool enabled; - /* Disable the adapter */ - __i2c_dw_enable(dev, false); + enabled = dw_readl(dev, DW_IC_ENABLE_STATUS) & 1; + + if (enabled) { + u32 ic_status; + + /* + * Only disable adapter if ic_tar and ic_con can't be + * dynamically updated + */ + ic_status = dw_readl(dev, DW_IC_STATUS); + if (!dev->dynamic_tar_update_enabled || + (ic_status & DW_IC_STATUS_MST_ACTIVITY) || + !(ic_status & DW_IC_STATUS_TFE)) { + __i2c_dw_enable_and_wait(dev, false); + enabled = false; + } + } /* if the slave address is ten bit address, enable 10BITADDR */ - ic_con = dw_readl(dev, DW_IC_CON); - if (msgs[dev->msg_write_idx].flags & I2C_M_TEN) { - ic_con |= DW_IC_CON_10BITADDR_MASTER; + if (dev->dynamic_tar_update_enabled) { /* * If I2C_DYNAMIC_TAR_UPDATE is set, the 10-bit addressing - * mode has to be enabled via bit 12 of IC_TAR register. - * We set it always as I2C_DYNAMIC_TAR_UPDATE can't be - * detected from registers. + * mode has to be enabled via bit 12 of IC_TAR register, + * otherwise bit 4 of IC_CON is used. */ - ic_tar = DW_IC_TAR_10BITADDR_MASTER; + if (msgs[dev->msg_write_idx].flags & I2C_M_TEN) + ic_tar = DW_IC_TAR_10BITADDR_MASTER; } else { - ic_con &= ~DW_IC_CON_10BITADDR_MASTER; - } + u32 ic_con = dw_readl(dev, DW_IC_CON); - dw_writel(dev, ic_con, DW_IC_CON); + if (msgs[dev->msg_write_idx].flags & I2C_M_TEN) + ic_con |= DW_IC_CON_10BITADDR_MASTER; + else + ic_con &= ~DW_IC_CON_10BITADDR_MASTER; + dw_writel(dev, ic_con, DW_IC_CON); + } /* * Set the slave (target) address and enable 10-bit addressing mode @@ -446,8 +515,8 @@ static void i2c_dw_xfer_init(struct dw_i2c_dev *dev) /* enforce disabled interrupts (due to HW issues) */ i2c_dw_disable_int(dev); - /* Enable the adapter */ - __i2c_dw_enable(dev, true); + if (!enabled) + __i2c_dw_enable(dev, true); /* Clear and enable interrupts */ dw_readl(dev, DW_IC_CLR_INTR); @@ -628,7 +697,8 @@ static int i2c_dw_handle_tx_abort(struct dw_i2c_dev *dev) } /* - * Prepare controller for a transaction and call i2c_dw_xfer_msg + * Prepare controller for a transaction and start transfer by calling + * i2c_dw_xfer_init() */ static int i2c_dw_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) @@ -651,13 +721,9 @@ i2c_dw_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) dev->abort_source = 0; dev->rx_outstanding = 0; - if (dev->acquire_lock) { - ret = dev->acquire_lock(dev); - if (ret) { - dev_err(dev->dev, "couldn't acquire bus ownership\n"); - goto done_nolock; - } - }< |