diff options
| -rw-r--r-- | arch/arm/plat-omap/i2c.c | 21 | ||||
| -rw-r--r-- | drivers/i2c/busses/i2c-omap.c | 32 | ||||
| -rw-r--r-- | include/linux/i2c-omap.h | 1 |
3 files changed, 18 insertions, 36 deletions
diff --git a/arch/arm/plat-omap/i2c.c b/arch/arm/plat-omap/i2c.c index db071bc..dba8338 100644 --- a/arch/arm/plat-omap/i2c.c +++ b/arch/arm/plat-omap/i2c.c @@ -26,7 +26,6 @@ #include <linux/kernel.h> #include <linux/platform_device.h> #include <linux/i2c.h> -#include <linux/i2c-omap.h> #include <linux/slab.h> #include <linux/err.h> #include <linux/clk.h> @@ -34,7 +33,6 @@ #include <mach/irqs.h> #include <plat/mux.h> #include <plat/i2c.h> -#include <plat/omap-pm.h> #include <plat/omap_device.h> #define OMAP_I2C_SIZE 0x3f @@ -129,16 +127,6 @@ static inline int omap1_i2c_add_bus(int bus_id) #ifdef CONFIG_ARCH_OMAP2PLUS -/* - * XXX This function is a temporary compatibility wrapper - only - * needed until the I2C driver can be converted to call - * omap_pm_set_max_dev_wakeup_lat() and handle a return code. - */ -static void omap_pm_set_max_mpu_wakeup_lat_compat(struct device *dev, long t) -{ - omap_pm_set_max_mpu_wakeup_lat(dev, t); -} - static inline int omap2_i2c_add_bus(int bus_id) { int l; @@ -170,15 +158,6 @@ static inline int omap2_i2c_add_bus(int bus_id) dev_attr = (struct omap_i2c_dev_attr *)oh->dev_attr; pdata->flags = dev_attr->flags; - /* - * When waiting for completion of a i2c transfer, we need to - * set a wake up latency constraint for the MPU. This is to - * ensure quick enough wakeup from idle, when transfer - * completes. - * Only omap3 has support for constraints - */ - if (cpu_is_omap34xx()) - pdata->set_mpu_wkup_lat = omap_pm_set_max_mpu_wakeup_lat_compat; pdev = omap_device_build(name, bus_id, oh, pdata, sizeof(struct omap_i2c_bus_platform_data), NULL, 0, 0); diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index c78431a..b6c6b95 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -43,6 +43,7 @@ #include <linux/slab.h> #include <linux/i2c-omap.h> #include <linux/pm_runtime.h> +#include <linux/pm_qos.h> /* I2C controller revisions */ #define OMAP_I2C_OMAP1_REV_2 0x20 @@ -186,9 +187,8 @@ struct omap_i2c_dev { int reg_shift; /* bit shift for I2C register addresses */ struct completion cmd_complete; struct resource *ioarea; - u32 latency; /* maximum mpu wkup latency */ - void (*set_mpu_wkup_lat)(struct device *dev, - long latency); + u32 latency; /* maximum MPU wkup latency */ + struct pm_qos_request pm_qos_request; u32 speed; /* Speed of bus in kHz */ u32 dtrev; /* extra revision from DT */ u32 flags; @@ -494,9 +494,7 @@ static void omap_i2c_resize_fifo(struct omap_i2c_dev *dev, u8 size, bool is_rx) dev->b_hw = 1; /* Enable hardware fixes */ /* calculate wakeup latency constraint for MPU */ - if (dev->set_mpu_wkup_lat != NULL) - dev->latency = (1000000 * dev->threshold) / - (1000 * dev->speed / 8); + dev->latency = (1000000 * dev->threshold) / (1000 * dev->speed / 8); } /* @@ -631,8 +629,16 @@ omap_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) if (r < 0) goto out; - if (dev->set_mpu_wkup_lat != NULL) - dev->set_mpu_wkup_lat(dev->dev, dev->latency); + /* + * When waiting for completion of a i2c transfer, we need to + * set a wake up latency constraint for the MPU. This is to + * ensure quick enough wakeup from idle, when transfer + * completes. + */ + if (dev->latency) + pm_qos_add_request(&dev->pm_qos_request, + PM_QOS_CPU_DMA_LATENCY, + dev->latency); for (i = 0; i < num; i++) { r = omap_i2c_xfer_msg(adap, &msgs[i], (i == (num - 1))); @@ -640,8 +646,8 @@ omap_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) break; } - if (dev->set_mpu_wkup_lat != NULL) - dev->set_mpu_wkup_lat(dev->dev, -1); + if (dev->latency) + pm_qos_remove_request(&dev->pm_qos_request); if (r == 0) r = num; @@ -1097,7 +1103,6 @@ omap_i2c_probe(struct platform_device *pdev) } else if (pdata != NULL) { dev->speed = pdata->clkrate; dev->flags = pdata->flags; - dev->set_mpu_wkup_lat = pdata->set_mpu_wkup_lat; dev->dtrev = pdata->rev; } @@ -1153,9 +1158,8 @@ omap_i2c_probe(struct platform_device *pdev) dev->b_hw = 1; /* Enable hardware fixes */ /* calculate wakeup latency constraint for MPU */ - if (dev->set_mpu_wkup_lat != NULL) - dev->latency = (1000000 * dev->fifo_size) / - (1000 * dev->speed / 8); + dev->latency = (1000000 * dev->fifo_size) / + (1000 * dev->speed / 8); } /* reset ASAP, clearing any IRQs */ diff --git a/include/linux/i2c-omap.h b/include/linux/i2c-omap.h index 92a0dc7..df804ba 100644 --- a/include/linux/i2c-omap.h +++ b/include/linux/i2c-omap.h @@ -34,7 +34,6 @@ struct omap_i2c_bus_platform_data { u32 clkrate; u32 rev; u32 flags; - void (*set_mpu_wkup_lat)(struct device *dev, long set); }; #endif |
