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-rw-r--r--drivers/pwm/pwm-vt8500.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/pwm/pwm-vt8500.c b/drivers/pwm/pwm-vt8500.c
index bbc37504103a..98d79e9f0144 100644
--- a/drivers/pwm/pwm-vt8500.c
+++ b/drivers/pwm/pwm-vt8500.c
@@ -164,10 +164,31 @@ static void vt8500_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
164 clk_disable(vt8500->clk); 164 clk_disable(vt8500->clk);
165} 165}
166 166
167static int vt8500_pwm_set_polarity(struct pwm_chip *chip,
168 struct pwm_device *pwm,
169 enum pwm_polarity polarity)
170{
171 struct vt8500_chip *vt8500 = to_vt8500_chip(chip);
172 u32 val;
173
174 val = readl(vt8500->base + REG_CTRL(pwm->hwpwm));
175
176 if (polarity == PWM_POLARITY_INVERSED)
177 val |= CTRL_INVERT;
178 else
179 val &= ~CTRL_INVERT;
180
181 writel(val, vt8500->base + REG_CTRL(pwm->hwpwm));
182 pwm_busy_wait(vt8500, pwm->hwpwm, STATUS_CTRL_UPDATE);
183
184 return 0;
185}
186
167static struct pwm_ops vt8500_pwm_ops = { 187static struct pwm_ops vt8500_pwm_ops = {
168 .enable = vt8500_pwm_enable, 188 .enable = vt8500_pwm_enable,
169 .disable = vt8500_pwm_disable, 189 .disable = vt8500_pwm_disable,
170 .config = vt8500_pwm_config, 190 .config = vt8500_pwm_config,
191 .set_polarity = vt8500_pwm_set_polarity,
171 .owner = THIS_MODULE, 192 .owner = THIS_MODULE,
172}; 193};
173 194
@@ -197,6 +218,8 @@ static int vt8500_pwm_probe(struct platform_device *pdev)
197 218
198 chip->chip.dev = &pdev->dev; 219 chip->chip.dev = &pdev->dev;
199 chip->chip.ops = &vt8500_pwm_ops; 220 chip->chip.ops = &vt8500_pwm_ops;
221 chip->chip.of_xlate = of_pwm_xlate_with_flags;
222 chip->chip.of_pwm_n_cells = 3;
200 chip->chip.base = -1; 223 chip->chip.base = -1;
201 chip->chip.npwm = VT8500_NR_PWMS; 224 chip->chip.npwm = VT8500_NR_PWMS;
202 225