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authorLinus Torvalds <torvalds@linux-foundation.org>2012-12-19 11:19:07 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-19 11:19:07 -0500
commit74779e22261172ea728b989310f6ecc991b57d62 (patch)
treea6c71e02bf6cefc9e0d261dd1ab11f4a7433ed92 /drivers/pwm/core.c
parent5031a2a7c12b837a0913c4139ebeb6bbff5e1aa5 (diff)
parent20e8ac3eea4dcfeea6ebeae57cd2c739fa48da11 (diff)
Merge tag 'for-3.8-rc1' of git://gitorious.org/linux-pwm/linux-pwm
Pull pwm changes from Thierry Reding: "A new driver has been added for the SPEAr platform and the TWL4030/6030 driver has been replaced by two drivers that control the regular PWMs and the PWM driven LEDs provided by the chips. The vt8500, tiecap, tiehrpwm, i.MX, LPC32xx and Samsung drivers have all been improved and the device tree bindings now support the PWM signal polarity." Fix up trivial conflicts due to __devinit/exit removal. * tag 'for-3.8-rc1' of git://gitorious.org/linux-pwm/linux-pwm: (21 commits) pwm: samsung: add missing s3c->pwm_id assignment pwm: lpc32xx: Set the chip base for dynamic allocation pwm: lpc32xx: Properly disable the clock on device removal pwm: lpc32xx: Fix the PWM polarity pwm: i.MX: eliminate build warning pwm: Export of_pwm_xlate_with_flags() pwm: Remove pwm-twl6030 driver pwm: New driver to support PWM driven LEDs on TWL4030/6030 series of PMICs pwm: New driver to support PWMs on TWL4030/6030 series of PMICs pwm: pwm-tiehrpwm: pinctrl support pwm: tiehrpwm: Add device-tree binding pwm: pwm-tiehrpwm: Adding TBCLK gating support. pwm: pwm-tiecap: pinctrl support pwm: tiecap: Add device-tree binding pwm: Add TI PWM subsystem driver pwm: Device tree support for PWM polarity pwm: vt8500: Ensure PWM clock is enabled during pwm_config pwm: vt8500: Fix build error pwm: spear: Staticize spear_pwm_config() pwm: Add SPEAr PWM chip driver support ...
Diffstat (limited to 'drivers/pwm/core.c')
-rw-r--r--drivers/pwm/core.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index f5acdaa52707..903138b18842 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -32,6 +32,9 @@
32 32
33#define MAX_PWMS 1024 33#define MAX_PWMS 1024
34 34
35/* flags in the third cell of the DT PWM specifier */
36#define PWM_SPEC_POLARITY (1 << 0)
37
35static DEFINE_MUTEX(pwm_lookup_lock); 38static DEFINE_MUTEX(pwm_lookup_lock);
36static LIST_HEAD(pwm_lookup_list); 39static LIST_HEAD(pwm_lookup_list);
37static DEFINE_MUTEX(pwm_lock); 40static DEFINE_MUTEX(pwm_lock);
@@ -129,6 +132,32 @@ static int pwm_device_request(struct pwm_device *pwm, const char *label)
129 return 0; 132 return 0;
130} 133}
131 134
135struct pwm_device *
136of_pwm_xlate_with_flags(struct pwm_chip *pc, const struct of_phandle_args *args)
137{
138 struct pwm_device *pwm;
139
140 if (pc->of_pwm_n_cells < 3)
141 return ERR_PTR(-EINVAL);
142
143 if (args->args[0] >= pc->npwm)
144 return ERR_PTR(-EINVAL);
145
146 pwm = pwm_request_from_chip(pc, args->args[0], NULL);
147 if (IS_ERR(pwm))
148 return pwm;
149
150 pwm_set_period(pwm, args->args[1]);
151
152 if (args->args[2] & PWM_SPEC_POLARITY)
153 pwm_set_polarity(pwm, PWM_POLARITY_INVERSED);
154 else
155 pwm_set_polarity(pwm, PWM_POLARITY_NORMAL);
156
157 return pwm;
158}
159EXPORT_SYMBOL_GPL(of_pwm_xlate_with_flags);
160
132static struct pwm_device * 161static struct pwm_device *
133of_pwm_simple_xlate(struct pwm_chip *pc, const struct of_phandle_args *args) 162of_pwm_simple_xlate(struct pwm_chip *pc, const struct of_phandle_args *args)
134{ 163{