diff options
| -rw-r--r-- | MAINTAINERS | 1 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap-i2c.c | 2 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap-irq.c | 15 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap.c | 31 | ||||
| -rw-r--r-- | include/linux/regmap.h | 49 |
5 files changed, 90 insertions, 8 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index f4698b1cf847..b407c5f5caa4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -9691,6 +9691,7 @@ M: Mark Brown <broonie@kernel.org> L: linux-kernel@vger.kernel.org T: git git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git S: Supported +F: Documentation/devicetree/bindings/regmap/ F: drivers/base/regmap/ F: include/linux/regmap.h diff --git a/drivers/base/regmap/regmap-i2c.c b/drivers/base/regmap/regmap-i2c.c index 1a8ec3b2b601..4735318f4268 100644 --- a/drivers/base/regmap/regmap-i2c.c +++ b/drivers/base/regmap/regmap-i2c.c @@ -259,7 +259,7 @@ static const struct regmap_bus *regmap_get_i2c_bus(struct i2c_client *i2c, { if (i2c_check_functionality(i2c->adapter, I2C_FUNC_I2C)) return ®map_i2c; - else if (config->reg_bits == 8 && + else if (config->val_bits == 8 && config->reg_bits == 8 && i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) return ®map_i2c_smbus_i2c_block; diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c index 26f799e71c82..ec262476d043 100644 --- a/drivers/base/regmap/regmap-irq.c +++ b/drivers/base/regmap/regmap-irq.c @@ -268,13 +268,16 @@ static irqreturn_t regmap_irq_thread(int irq, void *d) bool handled = false; u32 reg; + if (chip->handle_pre_irq) + chip->handle_pre_irq(chip->irq_drv_data); + if (chip->runtime_pm) { ret = pm_runtime_get_sync(map->dev); if (ret < 0) { dev_err(map->dev, "IRQ thread failed to resume: %d\n", ret); pm_runtime_put(map->dev); - return IRQ_NONE; + goto exit; } } @@ -296,7 +299,7 @@ static irqreturn_t regmap_irq_thread(int irq, void *d) if (ret != 0) { dev_err(map->dev, "Failed to read IRQ status: %d\n", ret); - return IRQ_NONE; + goto exit; } for (i = 0; i < data->chip->num_regs; i++) { @@ -312,7 +315,7 @@ static irqreturn_t regmap_irq_thread(int irq, void *d) break; default: BUG(); - return IRQ_NONE; + goto exit; } } @@ -329,7 +332,7 @@ static irqreturn_t regmap_irq_thread(int irq, void *d) ret); if (chip->runtime_pm) pm_runtime_put(map->dev); - return IRQ_NONE; + goto exit; } } } @@ -365,6 +368,10 @@ static irqreturn_t regmap_irq_thread(int irq, void *d) if (chip->runtime_pm) pm_runtime_put(map->dev); +exit: + if (chip->handle_post_irq) + chip->handle_post_irq(chip->irq_drv_data); + if (handled) return IRQ_HANDLED; else diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index df2d2ef5d6b3..51fa7d66a393 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1777,8 +1777,6 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, size_t val_bytes = map->format.val_bytes; size_t total_size = val_bytes * val_count; - if (map->bus && !map->format.parse_inplace) - return -EINVAL; if (!IS_ALIGNED(reg, map->reg_stride)) return -EINVAL; @@ -1789,7 +1787,8 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, * * The first if block is used for memory mapped io. It does not allow * val_bytes of 3 for example. - * The second one is used for busses which do not have this limitation + * The second one is for busses that do not provide raw I/O. + * The third one is used for busses which do not have these limitations * and can write arbitrary value lengths. */ if (!map->bus) { @@ -1825,6 +1824,32 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, } out: map->unlock(map->lock_arg); + } else if (map->bus && !map->format.parse_inplace) { + const u8 *u8 = val; + const u16 *u16 = val; + const u32 *u32 = val; + unsigned int ival; + + for (i = 0; i < val_count; i++) { + switch (map->format.val_bytes) { + case 4: + ival = u32[i]; + break; + case 2: + ival = u16[i]; + break; + case 1: + ival = u8[i]; + break; + default: + return -EINVAL; + } + + ret = regmap_write(map, reg + (i * map->reg_stride), + ival); + if (ret) + return ret; + } } else if (map->use_single_write || (map->max_raw_write && map->max_raw_write < total_size)) { int chunk_stride = map->reg_stride; diff --git a/include/linux/regmap.h b/include/linux/regmap.h index 3dc08ce15426..2c12cc5af744 100644 --- a/include/linux/regmap.h +++ b/include/linux/regmap.h @@ -95,6 +95,45 @@ struct reg_sequence { #define regmap_fields_force_update_bits(field, id, mask, val) \ regmap_fields_update_bits_base(field, id, mask, val, NULL, false, true) +/** + * regmap_read_poll_timeout - Poll until a condition is met or a timeout occurs + * @map: Regmap to read from + * @addr: Address to poll + * @val: Unsigned integer variable to read the value into + * @cond: Break condition (usually involving @val) + * @sleep_us: Maximum time to sleep between reads in us (0 + * tight-loops). Should be less than ~20ms since usleep_range + * is used (see Documentation/timers/timers-howto.txt). + * @timeout_us: Timeout in us, 0 means never timeout + * + * Returns 0 on success and -ETIMEDOUT upon a timeout or the regmap_read + * error return value in case of a error read. In the two former cases, + * the last read value at @addr is stored in @val. Must not be called + * from atomic context if sleep_us or timeout_us are used. + * + * This is modelled after the readx_poll_timeout macros in linux/iopoll.h. + */ +#define regmap_read_poll_timeout(map, addr, val, cond, sleep_us, timeout_us) \ +({ \ + ktime_t timeout = ktime_add_us(ktime_get(), timeout_us); \ + int ret; \ + might_sleep_if(sleep_us); \ + for (;;) { \ + ret = regmap_read((map), (addr), &(val)); \ + if (ret) \ + break; \ + if (cond) \ + break; \ + if (timeout_us && ktime_compare(ktime_get(), timeout) > 0) { \ + ret = regmap_read((map), (addr), &(val)); \ + break; \ + } \ + if (sleep_us) \ + usleep_range((sleep_us >> 2) + 1, sleep_us); \ + } \ + ret ?: ((cond) ? 0 : -ETIMEDOUT); \ +}) + #ifdef CONFIG_REGMAP enum regmap_endian { @@ -851,6 +890,12 @@ struct regmap_irq { * @num_type_reg: Number of type registers. * @type_reg_stride: Stride to use for chips where type registers are not * contiguous. + * @handle_pre_irq: Driver specific callback to handle interrupt from device + * before regmap_irq_handler process the interrupts. + * @handle_post_irq: Driver specific callback to handle interrupt from device + * after handling the interrupts in regmap_irq_handler(). + * @irq_drv_data: Driver specific IRQ data which is passed as parameter when + * driver specific pre/post interrupt handler is called. */ struct regmap_irq_chip { const char *name; @@ -877,6 +922,10 @@ struct regmap_irq_chip { int num_type_reg; unsigned int type_reg_stride; + + int (*handle_pre_irq)(void *irq_drv_data); + int (*handle_post_irq)(void *irq_drv_data); + void *irq_drv_data; }; struct regmap_irq_chip_data; |