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| author | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2020-03-30 14:31:37 +0300 |
|---|---|---|
| committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2020-03-30 14:31:37 +0300 |
| commit | ba15533275dd70238b523417d222d43fb40dac9d (patch) | |
| tree | e97f6b804994d20ce476dc5a123fc074799e9584 /drivers/i2c/busses/i2c-nvidia-gpu.c | |
| parent | f75410a406e934e4cf31e0a7ec151799a6bf38cf (diff) | |
| parent | 7111951b8d4973bda27ff663f2cf18b663d15b48 (diff) | |
| download | linux-ba15533275dd70238b523417d222d43fb40dac9d.tar.xz | |
Merge tag 'v5.6' into mips-next
Linux 5.6
Diffstat (limited to 'drivers/i2c/busses/i2c-nvidia-gpu.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-nvidia-gpu.c | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/drivers/i2c/busses/i2c-nvidia-gpu.c b/drivers/i2c/busses/i2c-nvidia-gpu.c index 62e18b4db0ed..f5d25ce00f03 100644 --- a/drivers/i2c/busses/i2c-nvidia-gpu.c +++ b/drivers/i2c/busses/i2c-nvidia-gpu.c @@ -8,6 +8,7 @@ #include <linux/delay.h> #include <linux/i2c.h> #include <linux/interrupt.h> +#include <linux/iopoll.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/platform_device.h> @@ -75,20 +76,15 @@ static void gpu_enable_i2c_bus(struct gpu_i2c_dev *i2cd) static int gpu_i2c_check_status(struct gpu_i2c_dev *i2cd) { - unsigned long target = jiffies + msecs_to_jiffies(1000); u32 val; + int ret; - do { - val = readl(i2cd->regs + I2C_MST_CNTL); - if (!(val & I2C_MST_CNTL_CYCLE_TRIGGER)) - break; - if ((val & I2C_MST_CNTL_STATUS) != - I2C_MST_CNTL_STATUS_BUS_BUSY) - break; - usleep_range(500, 600); - } while (time_is_after_jiffies(target)); - - if (time_is_before_jiffies(target)) { + ret = readl_poll_timeout(i2cd->regs + I2C_MST_CNTL, val, + !(val & I2C_MST_CNTL_CYCLE_TRIGGER) || + (val & I2C_MST_CNTL_STATUS) != I2C_MST_CNTL_STATUS_BUS_BUSY, + 500, 1000 * USEC_PER_MSEC); + + if (ret) { dev_err(i2cd->dev, "i2c timeout error %x\n", val); return -ETIMEDOUT; } |