pwm: rockchip: Use same PWM ops for each IP
Just use the same PWM ops for each IP, and get rid of the ops in struct rockchip_pwm_data, but still define the three different instances of the struct to use common interface for each IP. Signed-off-by: David Wu <david.wu@rock-chips.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
David Wu
Thierry Reding
Родитель
bc834d7b07
Коммит
831b279050
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@ -50,12 +50,7 @@ struct rockchip_pwm_data {
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struct rockchip_pwm_regs regs;
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unsigned int prescaler;
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bool supports_polarity;
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const struct pwm_ops *ops;
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void (*get_state)(struct pwm_chip *chip, struct pwm_device *pwm,
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struct pwm_state *state);
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int (*pwm_apply)(struct pwm_chip *chip, struct pwm_device *pwm,
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struct pwm_state *state);
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u32 enable_conf;
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};
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static inline struct rockchip_pwm_chip *to_rockchip_pwm_chip(struct pwm_chip *c)
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@ -63,45 +58,15 @@ static inline struct rockchip_pwm_chip *to_rockchip_pwm_chip(struct pwm_chip *c)
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return container_of(c, struct rockchip_pwm_chip, chip);
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}
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static void rockchip_pwm_get_state_v1(struct pwm_chip *chip,
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struct pwm_device *pwm,
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struct pwm_state *state)
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{
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struct rockchip_pwm_chip *pc = to_rockchip_pwm_chip(chip);
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u32 enable_conf = PWM_CTRL_OUTPUT_EN | PWM_CTRL_TIMER_EN;
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u32 val;
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val = readl_relaxed(pc->base + pc->data->regs.ctrl);
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if ((val & enable_conf) == enable_conf)
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state->enabled = true;
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}
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static void rockchip_pwm_get_state_v2(struct pwm_chip *chip,
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struct pwm_device *pwm,
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struct pwm_state *state)
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{
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struct rockchip_pwm_chip *pc = to_rockchip_pwm_chip(chip);
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u32 enable_conf = PWM_OUTPUT_LEFT | PWM_LP_DISABLE | PWM_ENABLE |
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PWM_CONTINUOUS;
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u32 val;
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val = readl_relaxed(pc->base + pc->data->regs.ctrl);
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if ((val & enable_conf) != enable_conf)
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return;
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state->enabled = true;
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if (!(val & PWM_DUTY_POSITIVE))
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state->polarity = PWM_POLARITY_INVERSED;
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}
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static void rockchip_pwm_get_state(struct pwm_chip *chip,
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struct pwm_device *pwm,
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struct pwm_state *state)
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{
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struct rockchip_pwm_chip *pc = to_rockchip_pwm_chip(chip);
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u32 enable_conf = pc->data->enable_conf;
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unsigned long clk_rate;
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u64 tmp;
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u32 val;
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int ret;
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ret = clk_enable(pc->pclk);
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@ -118,7 +83,18 @@ static void rockchip_pwm_get_state(struct pwm_chip *chip,
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tmp *= pc->data->prescaler * NSEC_PER_SEC;
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state->duty_cycle = DIV_ROUND_CLOSEST_ULL(tmp, clk_rate);
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pc->data->get_state(chip, pwm, state);
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val = readl_relaxed(pc->base + pc->data->regs.ctrl);
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if (pc->data->supports_polarity)
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state->enabled = ((val & enable_conf) != enable_conf) ?
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false : true;
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else
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state->enabled = ((val & enable_conf) == enable_conf) ?
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true : false;
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if (pc->data->supports_polarity) {
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if (!(val & PWM_DUTY_POSITIVE))
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state->polarity = PWM_POLARITY_INVERSED;
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}
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clk_disable(pc->pclk);
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}
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@ -161,10 +137,10 @@ static void rockchip_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
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static int rockchip_pwm_enable(struct pwm_chip *chip,
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struct pwm_device *pwm,
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bool enable,
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u32 enable_conf)
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bool enable)
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{
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struct rockchip_pwm_chip *pc = to_rockchip_pwm_chip(chip);
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u32 enable_conf = pc->data->enable_conf;
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int ret;
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u32 val;
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@ -189,74 +165,34 @@ static int rockchip_pwm_enable(struct pwm_chip *chip,
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return 0;
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}
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static int rockchip_pwm_apply_v1(struct pwm_chip *chip, struct pwm_device *pwm,
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struct pwm_state *state)
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{
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u32 enable_conf = PWM_CTRL_OUTPUT_EN | PWM_CTRL_TIMER_EN;
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struct pwm_state curstate;
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bool enabled;
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int ret = 0;
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pwm_get_state(pwm, &curstate);
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enabled = curstate.enabled;
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if (state->polarity != curstate.polarity && enabled) {
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ret = rockchip_pwm_enable(chip, pwm, false, enable_conf);
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if (ret)
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return ret;
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enabled = false;
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}
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rockchip_pwm_config(chip, pwm, state);
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if (state->enabled != enabled)
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ret = rockchip_pwm_enable(chip, pwm, state->enabled,
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enable_conf);
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return ret;
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}
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static int rockchip_pwm_apply_v2(struct pwm_chip *chip, struct pwm_device *pwm,
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struct pwm_state *state)
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{
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u32 enable_conf = PWM_OUTPUT_LEFT | PWM_LP_DISABLE | PWM_ENABLE |
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PWM_CONTINUOUS;
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struct pwm_state curstate;
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bool enabled;
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int ret = 0;
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pwm_get_state(pwm, &curstate);
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enabled = curstate.enabled;
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if (state->polarity != curstate.polarity && enabled) {
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ret = rockchip_pwm_enable(chip, pwm, false, enable_conf);
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if (ret)
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return ret;
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enabled = false;
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}
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rockchip_pwm_config(chip, pwm, state);
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if (state->enabled != enabled)
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ret = rockchip_pwm_enable(chip, pwm, state->enabled,
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enable_conf);
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return ret;
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}
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static int rockchip_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
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struct pwm_state *state)
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{
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struct rockchip_pwm_chip *pc = to_rockchip_pwm_chip(chip);
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int ret;
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struct pwm_state curstate;
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bool enabled;
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int ret = 0;
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ret = clk_enable(pc->pclk);
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if (ret)
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return ret;
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ret = pc->data->pwm_apply(chip, pwm, state);
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pwm_get_state(pwm, &curstate);
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enabled = curstate.enabled;
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if (state->polarity != curstate.polarity && enabled) {
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ret = rockchip_pwm_enable(chip, pwm, false);
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if (ret)
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goto out;
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enabled = false;
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}
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rockchip_pwm_config(chip, pwm, state);
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if (state->enabled != enabled) {
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ret = rockchip_pwm_enable(chip, pwm, state->enabled);
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if (ret)
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goto out;
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}
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/*
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* Update the state with the real hardware, which can differ a bit
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@ -270,13 +206,7 @@ out:
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return ret;
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}
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static const struct pwm_ops rockchip_pwm_ops_v1 = {
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.get_state = rockchip_pwm_get_state,
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.apply = rockchip_pwm_apply,
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.owner = THIS_MODULE,
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};
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static const struct pwm_ops rockchip_pwm_ops_v2 = {
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static const struct pwm_ops rockchip_pwm_ops = {
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.get_state = rockchip_pwm_get_state,
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.apply = rockchip_pwm_apply,
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.owner = THIS_MODULE,
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@ -290,9 +220,8 @@ static const struct rockchip_pwm_data pwm_data_v1 = {
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.ctrl = 0x0c,
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},
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.prescaler = 2,
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.ops = &rockchip_pwm_ops_v1,
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.get_state = rockchip_pwm_get_state_v1,
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.pwm_apply = rockchip_pwm_apply_v1,
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.supports_polarity = false,
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.enable_conf = PWM_CTRL_OUTPUT_EN | PWM_CTRL_TIMER_EN,
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};
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static const struct rockchip_pwm_data pwm_data_v2 = {
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@ -304,9 +233,8 @@ static const struct rockchip_pwm_data pwm_data_v2 = {
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},
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.prescaler = 1,
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.supports_polarity = true,
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.ops = &rockchip_pwm_ops_v2,
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.get_state = rockchip_pwm_get_state_v2,
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.pwm_apply = rockchip_pwm_apply_v2,
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.enable_conf = PWM_OUTPUT_LEFT | PWM_LP_DISABLE | PWM_ENABLE |
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PWM_CONTINUOUS,
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};
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static const struct rockchip_pwm_data pwm_data_vop = {
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@ -318,9 +246,8 @@ static const struct rockchip_pwm_data pwm_data_vop = {
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},
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.prescaler = 1,
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.supports_polarity = true,
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.ops = &rockchip_pwm_ops_v2,
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.get_state = rockchip_pwm_get_state_v2,
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.pwm_apply = rockchip_pwm_apply_v2,
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.enable_conf = PWM_OUTPUT_LEFT | PWM_LP_DISABLE | PWM_ENABLE |
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PWM_CONTINUOUS,
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};
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static const struct of_device_id rockchip_pwm_dt_ids[] = {
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@ -393,7 +320,7 @@ static int rockchip_pwm_probe(struct platform_device *pdev)
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pc->data = id->data;
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pc->chip.dev = &pdev->dev;
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pc->chip.ops = pc->data->ops;
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pc->chip.ops = &rockchip_pwm_ops;
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pc->chip.base = -1;
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pc->chip.npwm = 1;
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