14 Dec, 2020

1 commit

• ff3e6f71d   LF-807 pwm: imx-tpm: force 'real_period' to be zero in suspend ... Browse Code »

  During suspend, all the tpm registers will loose values.
  So the 'real_period' value of struct 'imx_tpm_pwm_chip'
  should be forced to be zero to force the period update
  code can be executed after system resume back.

  Signed-off-by: Fancy Fang

  Fancy Fang

  2020-12-14 12:08:42 +0800  

16 Jun, 2020

1 commit

• fcdea6b2a   pwm: imx-tpm: Use 64-bit division macro ... Browse Code »

  Since the PWM framework is switching struct pwm_state.period's datatype
  to u64, prepare for this transition by using DIV64_U64_ROUND_CLOSEST to
  handle a 64-bit divisor.

  Cc: Shawn Guo
  Cc: Sascha Hauer
  Cc: Pengutronix Kernel Team
  Cc: Fabio Estevam
  Cc: NXP Linux Team
  Signed-off-by: Guru Das Srinagesh
  Signed-off-by: Thierry Reding

  Guru Das Srinagesh

  2020-06-16 17:16:08 +0800  

30 Mar, 2020

1 commit

• c0adbd1cd   pwm: imx-tpm: Remove unused includes ... Browse Code »

  There is nothing in use from log2.h/of_address.h, remove them.

  Signed-off-by: Anson Huang
  Acked-by: Uwe Kleine-König
  Signed-off-by: Thierry Reding

  Anson Huang

  2020-03-30 22:55:26 +0800  

21 Sep, 2019

1 commit

• 71523d181   pwm: Ensure pwm_apply_state() doesn't modify the state argument ... Browse Code »

  It is surprising for a PWM consumer when the variable holding the
  requested state is modified by pwm_apply_state(). Consider for example a
  driver doing:

  #define PERIOD 5000000
  #define DUTY_LITTLE 10
  ...
  struct pwm_state state = {
  .period = PERIOD,
  .duty_cycle = DUTY_LITTLE,
  .polarity = PWM_POLARITY_NORMAL,
  .enabled = true,
  };

  pwm_apply_state(mypwm, &state);
  ...
  state.duty_cycle = PERIOD / 2;
  pwm_apply_state(mypwm, &state);

  For sure the second call to pwm_apply_state() should still have
  state.period = PERIOD and not something the hardware driver chose for a
  reason that doesn't necessarily apply to the second call.

  So declare the state argument as a pointer to a const type and adapt all
  drivers' .apply callbacks.

  Signed-off-by: Uwe Kleine-König
  Signed-off-by: Thierry Reding

  Uwe Kleine-König

  2019-09-21 09:25:10 +0800  

09 May, 2019

1 commit

• 738a1cfec   pwm: Add i.MX TPM PWM driver support ... Browse Code »

  i.MX7ULP has TPM(Low Power Timer/Pulse Width Modulation Module) inside,
  it can support multiple PWM channels, all the channels share same
  counter and period setting, but each channel can configure its duty and
  polarity independently.

  There are several TPM modules in i.MX7ULP, the number of channels in TPM
  modules are different, it can be read from each TPM module's PARAM
  register.

  Signed-off-by: Anson Huang
  Reviewed-by: Uwe Kleine-König
  Signed-off-by: Thierry Reding

  Anson Huang

  2019-05-09 23:01:48 +0800