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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-30 09:22:37 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-30 09:22:37 -0700 |
commit | 9ec97169e7d6afe2f8206d694d1411fb3bb49853 (patch) | |
tree | 9d24c8cd440a312f96b70db5cdaaef1136787003 /arch/blackfin/kernel | |
parent | a410963ba4c0c768302f0298e258b1ee940e8316 (diff) | |
parent | 19891b20e7c275feb92d669f4b1879861f7e8c25 (diff) | |
download | linux-9ec97169e7d6afe2f8206d694d1411fb3bb49853.tar.bz2 |
Merge branch 'for-3.6' of git://gitorious.org/linux-pwm/linux-pwm
Pull PWM subsystem from Thierry Reding:
"The new PWM subsystem aims at collecting all implementations of the
legacy PWM API and to eventually replace it completely.
The subsystem has been in development for over half a year now and
many drivers have already been converted. It has been in linux-next
for a couple of weeks and there have been no major issues so I think
it is ready for inclusion in your tree."
Arnd Bergmann <arnd@arndb.de>:
"Very much Ack on the new subsystem. It uses the interface
declarations as the previously separate pwm drivers, so nothing
changes for now in the drivers using it, although it enables us to
change those more easily in the future if we want to.
This work is also one of the missing pieces that are required to
eventually build ARM kernels for multiple platforms, which is
currently prohibited (amongs other things) by the fact that you cannot
have more than one driver exporting the pwm functions."
Tested-and-acked-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Philip, Avinash <avinashphilip@ti.com> # TI's AM33xx platforms
Acked-By: Alexandre Pereira da Silva <aletes.xgr@gmail.com> # LPC32XX
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Sachin Kamat <sachin.kamat@linaro.org>
Fix up trivial conflicts with other cleanups and DT updates.
* 'for-3.6' of git://gitorious.org/linux-pwm/linux-pwm: (36 commits)
pwm: pwm-tiehrpwm: PWM driver support for EHRPWM
pwm: pwm-tiecap: PWM driver support for ECAP APWM
pwm: fix used-uninitialized warning in pwm_get()
pwm: add lpc32xx PWM support
pwm_backlight: pass correct brightness to callback
pwm: Use pr_* functions in pwm-samsung.c file
pwm: Convert pwm-samsung to use devm_* APIs
pwm: Convert pwm-tegra to use devm_clk_get()
pwm: pwm-mxs: Return proper error if pwmchip_remove() fails
pwm: pwm-bfin: Return proper error if pwmchip_remove() fails
pwm: pxa: Propagate pwmchip_remove() error
pwm: Convert pwm-pxa to use devm_* APIs
pwm: Convert pwm-vt8500 to use devm_* APIs
pwm: Convert pwm-imx to use devm_* APIs
pwm: Conflict with legacy PWM API
pwm: pwm-mxs: add pinctrl support
pwm: pwm-mxs: use devm_* managed functions
pwm: pwm-mxs: use global reset function stmp_reset_block
pwm: pwm-mxs: encode soc name in compatible string
pwm: Take over maintainership of the PWM subsystem
...
Diffstat (limited to 'arch/blackfin/kernel')
-rw-r--r-- | arch/blackfin/kernel/Makefile | 1 | ||||
-rw-r--r-- | arch/blackfin/kernel/pwm.c | 100 |
2 files changed, 0 insertions, 101 deletions
diff --git a/arch/blackfin/kernel/Makefile b/arch/blackfin/kernel/Makefile index 08e6625106be..735f24e07425 100644 --- a/arch/blackfin/kernel/Makefile +++ b/arch/blackfin/kernel/Makefile @@ -21,7 +21,6 @@ obj-$(CONFIG_FUNCTION_TRACER) += ftrace-entry.o obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o CFLAGS_REMOVE_ftrace.o = -pg -obj-$(CONFIG_HAVE_PWM) += pwm.o obj-$(CONFIG_IPIPE) += ipipe.o obj-$(CONFIG_BFIN_GPTIMERS) += gptimers.o obj-$(CONFIG_CPLB_INFO) += cplbinfo.o diff --git a/arch/blackfin/kernel/pwm.c b/arch/blackfin/kernel/pwm.c deleted file mode 100644 index 33f5942733bd..000000000000 --- a/arch/blackfin/kernel/pwm.c +++ /dev/null @@ -1,100 +0,0 @@ -/* - * Blackfin Pulse Width Modulation (PWM) core - * - * Copyright (c) 2011 Analog Devices Inc. - * - * Licensed under the GPL-2 or later. - */ - -#include <linux/module.h> -#include <linux/pwm.h> -#include <linux/slab.h> - -#include <asm/gptimers.h> -#include <asm/portmux.h> - -struct pwm_device { - unsigned id; - unsigned short pin; -}; - -static const unsigned short pwm_to_gptimer_per[] = { - P_TMR0, P_TMR1, P_TMR2, P_TMR3, P_TMR4, P_TMR5, - P_TMR6, P_TMR7, P_TMR8, P_TMR9, P_TMR10, P_TMR11, -}; - -struct pwm_device *pwm_request(int pwm_id, const char *label) -{ - struct pwm_device *pwm; - int ret; - - /* XXX: pwm_id really should be unsigned */ - if (pwm_id < 0) - return NULL; - - pwm = kzalloc(sizeof(*pwm), GFP_KERNEL); - if (!pwm) - return pwm; - - pwm->id = pwm_id; - if (pwm->id >= ARRAY_SIZE(pwm_to_gptimer_per)) - goto err; - - pwm->pin = pwm_to_gptimer_per[pwm->id]; - ret = peripheral_request(pwm->pin, label); - if (ret) - goto err; - - return pwm; - err: - kfree(pwm); - return NULL; -} -EXPORT_SYMBOL(pwm_request); - -void pwm_free(struct pwm_device *pwm) -{ - peripheral_free(pwm->pin); - kfree(pwm); -} -EXPORT_SYMBOL(pwm_free); - -int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns) -{ - unsigned long period, duty; - unsigned long long val; - - if (duty_ns < 0 || duty_ns > period_ns) - return -EINVAL; - - val = (unsigned long long)get_sclk() * period_ns; - do_div(val, NSEC_PER_SEC); - period = val; - - val = (unsigned long long)period * duty_ns; - do_div(val, period_ns); - duty = period - val; - - if (duty >= period) - duty = period - 1; - - set_gptimer_config(pwm->id, TIMER_MODE_PWM | TIMER_PERIOD_CNT); - set_gptimer_pwidth(pwm->id, duty); - set_gptimer_period(pwm->id, period); - - return 0; -} -EXPORT_SYMBOL(pwm_config); - -int pwm_enable(struct pwm_device *pwm) -{ - enable_gptimer(pwm->id); - return 0; -} -EXPORT_SYMBOL(pwm_enable); - -void pwm_disable(struct pwm_device *pwm) -{ - disable_gptimer(pwm->id); -} -EXPORT_SYMBOL(pwm_disable); |