Tegra186 has PWM controller with only one output instead of
4 output in earlier generation SoCs.
Add support for Tegra186 and find the number of PWM output
based on driver data.
Signed-off-by: Laxman Dewangan <ldewangan@xxxxxxxxxx>
---
drivers/pwm/pwm-tegra.c | 31 ++++++++++++++++++++++++++-----
1 file changed, 26 insertions(+), 5 deletions(-)
diff --git a/drivers/pwm/pwm-tegra.c b/drivers/pwm/pwm-tegra.c
index 49cefd5..5547e7d 100644
--- a/drivers/pwm/pwm-tegra.c
+++ b/drivers/pwm/pwm-tegra.c
@@ -26,6 +26,7 @@
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/pwm.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
@@ -37,7 +38,9 @@
#define PWM_SCALE_WIDTH 13
#define PWM_SCALE_SHIFT 0
-#define NUM_PWM 4
+struct tegra_pwm_hwdata {
+ int num_pwm;
+};
struct tegra_pwm_chip {
struct pwm_chip chip;
@@ -47,6 +50,7 @@ struct tegra_pwm_chip {
struct reset_control *rstc;
void __iomem *mmio_base;
+ const struct tegra_pwm_hwdata *hw;
};
static inline struct tegra_pwm_chip *to_tegra_pwm_chip(struct pwm_chip *chip)
@@ -172,9 +176,16 @@ static const struct pwm_ops tegra_pwm_ops = {
static int tegra_pwm_probe(struct platform_device *pdev)
{
struct tegra_pwm_chip *pwm;
+ const struct tegra_pwm_hwdata *hwdata;
struct resource *r;
int ret;
+ hwdata = of_device_get_match_data(&pdev->dev);
+ if (!hwdata) {
+ dev_err(&pdev->dev, "Tegra PWM HW data not found\n");
+ return -ENODEV;
+ }
+
pwm = devm_kzalloc(&pdev->dev, sizeof(*pwm), GFP_KERNEL);
if (!pwm)
return -ENOMEM;
@@ -200,10 +211,11 @@ static int tegra_pwm_probe(struct platform_device *pdev)
}
reset_control_reset(pwm->rstc);
+ pwm->hw = hwdata;
pwm->chip.dev = &pdev->dev;
pwm->chip.ops = &tegra_pwm_ops;
pwm->chip.base = -1;
- pwm->chip.npwm = NUM_PWM;
+ pwm->chip.npwm = pwm->hw->num_pwm;
ret = pwmchip_add(&pwm->chip);
if (ret < 0) {
@@ -222,7 +234,7 @@ static int tegra_pwm_remove(struct platform_device *pdev)
if (WARN_ON(!pc))
return -ENODEV;
- for (i = 0; i < NUM_PWM; i++) {
+ for (i = 0; i < pc->hw->num_pwm; i++) {
struct pwm_device *pwm = &pc->chip.pwms[i];
if (!pwm_is_enabled(pwm))
@@ -237,9 +249,18 @@ static int tegra_pwm_remove(struct platform_device *pdev)
return pwmchip_remove(&pc->chip);
}
+static const struct tegra_pwm_hwdata tegra20_pwm_hw = {
+ .num_pwm = 4,
+};
+
+static const struct tegra_pwm_hwdata tegra186_pwm_hw = {
+ .num_pwm = 1,
+};
+
static const struct of_device_id tegra_pwm_of_match[] = {
- { .compatible = "nvidia,tegra20-pwm" },
- { .compatible = "nvidia,tegra30-pwm" },
+ { .compatible = "nvidia,tegra20-pwm", .data = &tegra20_pwm_hw },
+ { .compatible = "nvidia,tegra30-pwm", .data = &tegra20_pwm_hw },
+ { .compatible = "nvidia,tegra186-pwm", .data = &tegra186_pwm_hw, },
{ }
};
--
2.1.4
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