diff options
| author | William Breathitt Gray <william.gray@linaro.org> | 2023-02-27 11:45:22 -0500 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-03-05 23:38:50 +0000 |
| commit | 4d60cac951fd2dfbf261b83abb805748abc8b995 (patch) | |
| tree | 17d2911ac85ee88660657c38e7f032c437623492 /drivers/base | |
| parent | fe15c26ee26efa11741a7b632e9f23b01aca4cc6 (diff) | |
| download | linux-stable-4d60cac951fd2dfbf261b83abb805748abc8b995.tar.gz linux-stable-4d60cac951fd2dfbf261b83abb805748abc8b995.tar.bz2 linux-stable-4d60cac951fd2dfbf261b83abb805748abc8b995.zip | |
regmap-irq: Add no_status support
Some devices lack status registers, yet expect to handle interrupts.
Introduce a no_status flag to indicate such a configuration, where
rather than read a status register to verify, all interrupts received
are assumed to be active.
Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
Link: https://lore.kernel.org/r/bd501b4b5ff88da24d467f75e8c71b4e0e6f21e2.1677515341.git.william.gray@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/regmap/regmap-irq.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c index 8c903b8c9714..f4d544ee7c30 100644 --- a/drivers/base/regmap/regmap-irq.c +++ b/drivers/base/regmap/regmap-irq.c @@ -433,7 +433,10 @@ static irqreturn_t regmap_irq_thread(int irq, void *d) * possible in order to reduce the I/O overheads. */ - if (chip->num_main_regs) { + if (chip->no_status) { + /* no status register so default to all active */ + memset32(data->status_buf, GENMASK(31, 0), chip->num_regs); + } else if (chip->num_main_regs) { unsigned int max_main_bits; unsigned long size; @@ -949,12 +952,17 @@ int regmap_add_irq_chip_fwnode(struct fwnode_handle *fwnode, continue; /* Ack masked but set interrupts */ - reg = d->get_irq_reg(d, d->chip->status_base, i); - ret = regmap_read(map, reg, &d->status_buf[i]); - if (ret != 0) { - dev_err(map->dev, "Failed to read IRQ status: %d\n", - ret); - goto err_alloc; + if (d->chip->no_status) { + /* no status register so default to all active */ + d->status_buf[i] = GENMASK(31, 0); + } else { + reg = d->get_irq_reg(d, d->chip->status_base, i); + ret = regmap_read(map, reg, &d->status_buf[i]); + if (ret != 0) { + dev_err(map->dev, "Failed to read IRQ status: %d\n", + ret); + goto err_alloc; + } } if (chip->status_invert) |