From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
Add RZ/G3E GPT support. It has multiple clocks and resets compared to
RZ/G2L. Also prescale field width and factor for calculating prescale
are different.
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
drivers/pwm/pwm-rzg2l-gpt.c | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/drivers/pwm/pwm-rzg2l-gpt.c b/drivers/pwm/pwm-rzg2l-gpt.c
index b247a6c181d5..7047359cac63 100644
--- a/drivers/pwm/pwm-rzg2l-gpt.c
+++ b/drivers/pwm/pwm-rzg2l-gpt.c
@@ -153,6 +153,27 @@ static u8 rzg2l_gpt_calculate_prescale(u64 period_ticks)
return prescale;
}
+static u8 rzg3e_gpt_calculate_prescale(u64 period_ticks)
+{
+ u32 prescaled_period_ticks;
+ u8 prescale;
+
+ prescaled_period_ticks = period_ticks >> 32;
+ if (prescaled_period_ticks >= 64 && prescaled_period_ticks < 256) {
+ prescale = 6;
+ } else if (prescaled_period_ticks >= 256 && prescaled_period_ticks < 1024) {
+ prescale = 8;
+ } else if (prescaled_period_ticks >= 1024) {
+ prescale = 10;
+ } else {
+ prescale = fls(prescaled_period_ticks);
+ if (prescale > 1)
+ prescale -= 1;
+ }
+
+ return prescale;
+}
+
static int rzg2l_gpt_request(struct pwm_chip *chip, struct pwm_device *pwm)
{
struct rzg2l_gpt_chip *rzg2l_gpt = to_rzg2l_gpt_chip(chip);
@@ -443,6 +464,14 @@ static int rzg2l_gpt_probe(struct platform_device *pdev)
if (IS_ERR(rstc))
return dev_err_probe(dev, PTR_ERR(rstc), "Cannot deassert reset control\n");
+ rstc = devm_reset_control_get_optional_exclusive_deasserted(dev, "rst_s");
+ if (IS_ERR(rstc))
+ return dev_err_probe(dev, PTR_ERR(rstc), "Cannot deassert rst_s reset\n");
+
+ clk = devm_clk_get_optional_enabled(dev, "bus");
+ if (IS_ERR(clk))
+ return dev_err_probe(dev, PTR_ERR(clk), "Cannot get bus clock\n");
+
clk = devm_clk_get_enabled(dev, NULL);
if (IS_ERR(clk))
return dev_err_probe(dev, PTR_ERR(clk), "Cannot get clock\n");
@@ -481,6 +510,12 @@ static int rzg2l_gpt_probe(struct platform_device *pdev)
return 0;
}
+static const struct rzg2l_gpt_info rzg3e_data = {
+ .calculate_prescale = rzg3e_gpt_calculate_prescale,
+ .gtcr_tpcs_mask = GENMASK(26, 23),
+ .prescale_pow_of_two_mult_factor = 1,
+};
+
static const struct rzg2l_gpt_info rzg2l_data = {
.calculate_prescale = rzg2l_gpt_calculate_prescale,
.gtcr_tpcs_mask = GENMASK(26, 24),
@@ -488,6 +523,7 @@ static const struct rzg2l_gpt_info rzg2l_data = {
};
static const struct of_device_id rzg2l_gpt_of_table[] = {
+ { .compatible = "renesas,r9a09g047-gpt", .data = &rzg3e_data },
{ .compatible = "renesas,rzg2l-gpt", .data = &rzg2l_data },
{ /* Sentinel */ }
};
--
2.43.0
