diff options
Diffstat (limited to 'Documentation/driver-api')
-rw-r--r-- | Documentation/driver-api/gpio/driver.rst | 4 | ||||
-rw-r--r-- | Documentation/driver-api/men-chameleon-bus.rst | 12 | ||||
-rw-r--r-- | Documentation/driver-api/thermal/sysfs-api.rst | 6 |
3 files changed, 17 insertions, 5 deletions
diff --git a/Documentation/driver-api/gpio/driver.rst b/Documentation/driver-api/gpio/driver.rst index 0fb57e298b41..d6b0d779859b 100644 --- a/Documentation/driver-api/gpio/driver.rst +++ b/Documentation/driver-api/gpio/driver.rst @@ -640,8 +640,8 @@ compliance: level and edge IRQs * [1] http://www.spinics.net/lists/linux-omap/msg120425.html -* [2] https://lkml.org/lkml/2015/9/25/494 -* [3] https://lkml.org/lkml/2015/9/25/495 +* [2] https://lore.kernel.org/r/1443209283-20781-2-git-send-email-grygorii.strashko@ti.com +* [3] https://lore.kernel.org/r/1443209283-20781-3-git-send-email-grygorii.strashko@ti.com Requesting self-owned GPIO pins diff --git a/Documentation/driver-api/men-chameleon-bus.rst b/Documentation/driver-api/men-chameleon-bus.rst index 1b1f048aa748..6f0b9ee47595 100644 --- a/Documentation/driver-api/men-chameleon-bus.rst +++ b/Documentation/driver-api/men-chameleon-bus.rst @@ -18,6 +18,7 @@ MEN Chameleon Bus 4.1 The driver structure 4.2 Probing and attaching 4.3 Initializing the driver + 4.4 Using DMA Introduction @@ -173,3 +174,14 @@ module at the MCB core:: The module_mcb_driver() macro can be used to reduce the above code:: module_mcb_driver(foo_driver); + +Using DMA +--------- + +To make use of the kernel's DMA-API's function, you will need to use the +carrier device's 'struct device'. Fortunately 'struct mcb_device' embeds a +pointer (->dma_dev) to the carrier's device for DMA purposes:: + + ret = dma_set_mask_and_coherent(&mdev->dma_dev, DMA_BIT_MASK(dma_bits)); + if (rc) + /* Handle errors */ diff --git a/Documentation/driver-api/thermal/sysfs-api.rst b/Documentation/driver-api/thermal/sysfs-api.rst index a4969c474cc3..29fdd817ddb0 100644 --- a/Documentation/driver-api/thermal/sysfs-api.rst +++ b/Documentation/driver-api/thermal/sysfs-api.rst @@ -54,7 +54,7 @@ temperature) and throttle appropriate devices. trips: the total number of trip points this thermal zone supports. mask: - Bit string: If 'n'th bit is set, then trip point 'n' is writeable. + Bit string: If 'n'th bit is set, then trip point 'n' is writable. devdata: device private data ops: @@ -406,7 +406,7 @@ Thermal cooling device sys I/F, created once it's registered:: |---stats/reset: Writing any value resets the statistics |---stats/time_in_state_ms: Time (msec) spent in various cooling states |---stats/total_trans: Total number of times cooling state is changed - |---stats/trans_table: Cooing state transition table + |---stats/trans_table: Cooling state transition table Then next two dynamic attributes are created/removed in pairs. They represent @@ -766,5 +766,5 @@ emergency poweroff kicks in after the delay has elapsed and shuts down the system. If set to 0 emergency poweroff will not be supported. So a carefully -profiled non-zero positive value is a must for emergerncy poweroff to be +profiled non-zero positive value is a must for emergency poweroff to be triggered. |