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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-10-19 12:50:44 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-10-19 12:50:44 -0700 |
| commit | 278f1d0730f4d0acdfc64256ad9b1066d0f3ab57 (patch) | |
| tree | 27d983de59c4a857650d0472831969e2bf8c8706 /drivers/i2c/busses/i2c-imx.c | |
| parent | d590c6cdd96c8a254e7935ad12f65e4058c95a1b (diff) | |
| parent | 3e27a8445c21f8056517f188303827450590d868 (diff) | |
Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c updates from Wolfram Sang:
"Highlights from the I2C subsystem for 3.18:
- new drivers for Axxia AM55xx, and Hisilicon hix5hd2 SoC.
- designware driver gained AMD support, exynos gained exynos7 support
The rest is usual driver stuff. Hopefully no lowlights this time"
* 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: i801: Add Device IDs for Intel Sunrise Point PCH
i2c: hix5hd2: add i2c controller driver
i2c-imx: Disable the clock on probe failure
i2c: designware: Add support for AMD I2C controller
i2c: designware: Rework probe() to get clock a bit later
i2c: designware: Default to fast mode in case of ACPI
i2c: axxia: Add I2C driver for AXM55xx
i2c: exynos: add support for HSI2C module on Exynos7
i2c: mxs: detect No Slave Ack on SELECT in PIO mode
i2c: cros_ec: Remove EC_I2C_FLAG_10BIT
i2c: cros-ec-tunnel: Add of match table
i2c: rcar: remove sign-compare flaw
i2c: ismt: Use minimum descriptor size
i2c: imx: Add arbitration lost check
i2c: rk3x: Remove unlikely() annotations
i2c: rcar: check for no IRQ in rcar_i2c_irq()
i2c: rcar: make rcar_i2c_prepare_msg() *void*
i2c: rcar: simplify check for last message
i2c: designware: add support of platform data to set I2C mode
i2c: designware: add support of I2C standard mode
Diffstat (limited to 'drivers/i2c/busses/i2c-imx.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-imx.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c index 613069bc561a..c48e46af670a 100644 --- a/drivers/i2c/busses/i2c-imx.c +++ b/drivers/i2c/busses/i2c-imx.c @@ -268,6 +268,14 @@ static int i2c_imx_bus_busy(struct imx_i2c_struct *i2c_imx, int for_busy) while (1) { temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR); + + /* check for arbitration lost */ + if (temp & I2SR_IAL) { + temp &= ~I2SR_IAL; + imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2SR); + return -EAGAIN; + } + if (for_busy && (temp & I2SR_IBB)) break; if (!for_busy && !(temp & I2SR_IBB)) @@ -702,7 +710,7 @@ static int i2c_imx_probe(struct platform_device *pdev) pdev->name, i2c_imx); if (ret) { dev_err(&pdev->dev, "can't claim irq %d\n", irq); - return ret; + goto clk_disable; } /* Init queue */ @@ -727,7 +735,7 @@ static int i2c_imx_probe(struct platform_device *pdev) ret = i2c_add_numbered_adapter(&i2c_imx->adapter); if (ret < 0) { dev_err(&pdev->dev, "registration failed\n"); - return ret; + goto clk_disable; } /* Set up platform driver data */ @@ -741,6 +749,10 @@ static int i2c_imx_probe(struct platform_device *pdev) dev_info(&i2c_imx->adapter.dev, "IMX I2C adapter registered\n"); return 0; /* Return OK */ + +clk_disable: + clk_disable_unprepare(i2c_imx->clk); + return ret; } static int i2c_imx_remove(struct platform_device *pdev) |