From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
RZ/G2L GPT the prescale factors are continuous power of 4 whereas on RZ/G3E
it is power of 2 but discontinuous. Add calculate_prescale() callback to
struct rzg2l_gpt_info for handling this difference.
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
drivers/pwm/pwm-rzg2l-gpt.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/pwm/pwm-rzg2l-gpt.c b/drivers/pwm/pwm-rzg2l-gpt.c
index 74bb0cca4ab4..b247a6c181d5 100644
--- a/drivers/pwm/pwm-rzg2l-gpt.c
+++ b/drivers/pwm/pwm-rzg2l-gpt.c
@@ -90,6 +90,7 @@
#define RZG2L_MAX_TICKS ((u64)U32_MAX * RZG2L_MAX_SCALE_FACTOR)
struct rzg2l_gpt_info {
+ u8 (*calculate_prescale)(u64 period);
u32 gtcr_tpcs_mask;
u8 prescale_pow_of_two_mult_factor;
};
@@ -138,8 +139,7 @@ static void rzg2l_gpt_modify(struct rzg2l_gpt_chip *rzg2l_gpt, u32 reg, u32 clr,
(rzg2l_gpt_read(rzg2l_gpt, reg) & ~clr) | set);
}
-static u8 rzg2l_gpt_calculate_prescale(struct rzg2l_gpt_chip *rzg2l_gpt,
- u64 period_ticks)
+static u8 rzg2l_gpt_calculate_prescale(u64 period_ticks)
{
u32 prescaled_period_ticks;
u8 prescale;
@@ -292,7 +292,7 @@ static int rzg2l_gpt_round_waveform_tohw(struct pwm_chip *chip,
period_ticks = rzg2l_gpt->period_ticks[ch];
}
- wfhw->prescale = rzg2l_gpt_calculate_prescale(rzg2l_gpt, period_ticks);
+ wfhw->prescale = info->calculate_prescale(period_ticks);
pv = rzg2l_gpt_calculate_pv_or_dc(info, period_ticks, wfhw->prescale);
wfhw->gtpr = pv;
duty_ticks = mul_u64_u64_div_u64(wf->duty_length_ns, rzg2l_gpt->rate_khz, USEC_PER_SEC);
@@ -482,6 +482,7 @@ static int rzg2l_gpt_probe(struct platform_device *pdev)
}
static const struct rzg2l_gpt_info rzg2l_data = {
+ .calculate_prescale = rzg2l_gpt_calculate_prescale,
.gtcr_tpcs_mask = GENMASK(26, 24),
.prescale_pow_of_two_mult_factor = 2,
};
--
2.43.0
