lwn.git/drivers/pwm/pwm-pxa.c, branch v4.13-rc6

pwm: constify pwm_ops structures

2017-01-18T23:38:17+00:00

Declare pwm_ops structures as const as they are only stored in the ops field of a pwm_chip structure. This field is of type const struct pwm_ops *, so pwm_ops structures having this property can be declared as const. Done using Coccinelle: @r1 disable optional_qualifier@ identifier i; position p; @@ static struct pwm_ops i@p={...}; @ok1@ identifier r1.i; position p; struct pxa_pwm_chip pwm; struct bfin_pwm_chip bwm; struct vt8500_chip vp; struct imx_chip icp; @@ ( pwm.chip.ops=&i@p | bwm.chip.ops=&i@p | vp.chip.ops=&i@p | icp.chip.ops=&i@p ) @bad@ position p!={r1.p,ok1.p}; identifier r1.i; @@ i@p @depends on !bad disable optional_qualifier@ identifier r1.i; @@ +const struct pwm_ops i; File size details: text data bss dec hex filename 1646 328 0 1974 7b6 drivers/pwm/pwm-imx.o 1742 224 0 1966 7ae drivers/pwm/pwm-imx.o 1941 296 0 2237 8bd drivers/pwm/pwm-pxa.o 2037 192 0 2229 8b5 drivers/pwm/pwm-pxa.o 1946 296 0 2242 8c2 drivers/pwm/pwm-vt8500.o 2050 192 0 2242 8c2 drivers/pwm/pwm-vt8500.o The drivers/pwm/pwm-bfin.o file did not compile. Signed-off-by: Bhumika Goyal Signed-off-by: Thierry Reding

pwm: Introduce the pwm_args concept

2016-05-03T11:44:37+00:00

Currently the PWM core mixes the current PWM state with the per-platform reference config (specified through the PWM lookup table, DT definition or directly hardcoded in PWM drivers). Create a struct pwm_args to store this reference configuration, so that PWM users can differentiate between the current and reference configurations. Patch all places where pwm->args should be initialized. We keep the pwm_set_polarity/period() calls until all PWM users are patched to use pwm_args instead of pwm_get_period/polarity(). Signed-off-by: Boris Brezillon [thierry.reding@gmail.com: reword kerneldoc comments] Signed-off-by: Thierry Reding

pwm: drop owner assignment from platform_drivers

2014-10-20T14:21:28+00:00

A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang

pwm: pxa: Remove unnecessary OOM messages

2014-04-28T11:37:48+00:00

The site-specific OOM messages are unnecessary, because they duplicate the MM subsystem generic OOM message. Signed-off-by: Jingoo Han Signed-off-by: Thierry Reding

pwm: pxa: Constify OF match table

2014-04-01T12:06:43+00:00

The table is never modified and all OF functions that use it take a const struct of_device_id *. Signed-off-by: Thierry Reding

pwm: pxa: Fix typo "pwm" -> "PWM"

2014-04-01T12:04:59+00:00

Being an abbreviation, PWM should always be capitalized in prose. Signed-off-by: Thierry Reding

Revert "pwm: pxa: Use of_match_ptr()"

2014-04-01T12:01:32+00:00

This reverts commit 8468949cddcdbb1b1b1bc552aefceb252078ceb1. The OF match table dummy for non-OF configurations cannot be removed because it is still used by the pxa_pwm_get_id_dt() function. Signed-off-by: Thierry Reding

pwm: pxa: Use of_match_ptr()

2014-02-26T15:14:57+00:00

Use of_match_ptr(), because of_match_ptr() returns NULL pointer when CONFIG_OF is disabled. Signed-off-by: Jingoo Han Signed-off-by: Thierry Reding

pwm: pxa: remove unnecessary space before tabs

2013-12-20T09:53:55+00:00

Remove unnecessary space before tabs in order to fix the following checkpatch warning. WARNING: please, no space before tabs Signed-off-by: Jingoo Han Signed-off-by: Thierry Reding

pwm: pxa: Add device tree support

2013-12-04T09:18:52+00:00

This patch adds device tree support to the PXA's PWM driver. Nothing needs to be extracted from the device tree node by the PWM device. Client devices need only specify the period; the per-chip index is implicitly zero because one device node must be present for each PWM output in use. This approach is more convenient due to the wide variability in the number of PWM channels present across the various PXA variants, and is made possible by the fact that the register sets for each PWM channel are segregated from each other. An of_xlate() method is added to parse this single-cell node. The existing ID table is reused for the match table data. Tested on a Palm Treo 680 (both platform data and DT cases). Signed-off-by: Mike Dunn Signed-off-by: Thierry Reding