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pinctrl: intel: Enumerate PWM device when community has a capability

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Some of the Communities may have PWM capability. In such cases,
enumerate the PWM device via respective driver. A user is still
responsible for setting correct pin muxing for the line that
needs to output the signal.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Thierry Reding <thierry.reding@gmail.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
This commit is contained in:
Andy Shevchenko 2022-11-17 13:08:06 +02:00
parent f0f31de356
commit eb78d3604d
1 changed files with 29 additions and 0 deletions
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29
drivers/pinctrl/intel/pinctrl-intel.c
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@ -21,6 +21,8 @@
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/platform_data/x86/pwm-lpss.h>
#include "../core.h"
#include "pinctrl-intel.h"
@ -46,6 +48,8 @@
#define PADOWN_MASK(p) (GENMASK(3, 0) << PADOWN_SHIFT(p))
#define PADOWN_GPP(p) ((p) / 8)
#define PWMC 0x204
/* Offset from pad_regs */
#define PADCFG0 0x000
#define PADCFG0_RXEVCFG_SHIFT 25
@ -1499,6 +1503,27 @@ static int intel_pinctrl_pm_init(struct intel_pinctrl *pctrl)
return 0;
}
static int intel_pinctrl_probe_pwm(struct intel_pinctrl *pctrl,
struct intel_community *community)
{
static const struct pwm_lpss_boardinfo info = {
.clk_rate = 19200000,
.npwm = 1,
.base_unit_bits = 22,
.bypass = true,
};
struct pwm_lpss_chip *pwm;
if (!(community->features & PINCTRL_FEATURE_PWM))
return 0;
if (!IS_REACHABLE(CONFIG_PWM_LPSS))
return 0;
pwm = devm_pwm_lpss_probe(pctrl->dev, community->regs + PWMC, &info);
return PTR_ERR_OR_ZERO(pwm);
}
static int intel_pinctrl_probe(struct platform_device *pdev,
const struct intel_pinctrl_soc_data *soc_data)
{
@ -1584,6 +1609,10 @@ static int intel_pinctrl_probe(struct platform_device *pdev,
ret = intel_pinctrl_add_padgroups_by_size(pctrl, community);
if (ret)
return ret;
ret = intel_pinctrl_probe_pwm(pctrl, community);
if (ret)
return ret;
}
irq = platform_get_irq(pdev, 0);