diff options
| author | Raag Jadav <raag.jadav@intel.com> | 2024-02-19 09:08:34 +0530 |
|---|---|---|
| committer | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2024-02-26 11:14:46 +0100 |
| commit | ebf2c89eb95ec9598da19184632b765de72a7db4 (patch) | |
| tree | 5706f7b59036e55ad211697fab16c90afe121f4b /drivers/pwm | |
| parent | 144a0008b30bc133cbaa9da7cf56d7cf2bacc4f9 (diff) | |
| download | linux-ebf2c89eb95ec9598da19184632b765de72a7db4.tar.gz | |
pwm: dwc: Add 16 channel support for Intel Elkhart Lake
Intel Elkhart Lake PSE includes two instances of PWM as a single PCI
function with 8 channels each. Add support for the remaining channels.
Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Tested-by: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
Link: https://lore.kernel.org/r/20240219033835.11369-4-raag.jadav@intel.com
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-dwc.c | 38 | ||||
| -rw-r--r-- | drivers/pwm/pwm-dwc.h | 5 |
2 files changed, 34 insertions, 9 deletions
diff --git a/drivers/pwm/pwm-dwc.c b/drivers/pwm/pwm-dwc.c index 7dbb72c80ef59..de95352081fa8 100644 --- a/drivers/pwm/pwm-dwc.c +++ b/drivers/pwm/pwm-dwc.c @@ -25,17 +25,32 @@ #include "pwm-dwc.h" -static int dwc_pwm_probe(struct pci_dev *pci, const struct pci_device_id *id) +/* Elkhart Lake */ +static const struct dwc_pwm_info ehl_pwm_info = { + .nr = 2, + .size = 0x1000, +}; + +static int dwc_pwm_init_one(struct device *dev, void __iomem *base, unsigned int offset) { - struct device *dev = &pci->dev; struct pwm_chip *chip; struct dwc_pwm *dwc; - int ret; chip = dwc_pwm_alloc(dev); if (IS_ERR(chip)) return PTR_ERR(chip); + dwc = to_dwc_pwm(chip); + dwc->base = base + offset; + + return devm_pwmchip_add(dev, chip); +} + +static int dwc_pwm_probe(struct pci_dev *pci, const struct pci_device_id *id) +{ + const struct dwc_pwm_info *info; + struct device *dev = &pci->dev; + int i, ret; ret = pcim_enable_device(pci); if (ret) { @@ -51,12 +66,17 @@ static int dwc_pwm_probe(struct pci_dev *pci, const struct pci_device_id *id) return ret; } - /* No need to check for failure, pcim_iomap_regions() does it for us. */ - dwc->base = pcim_iomap_table(pci)[0]; + info = (const struct dwc_pwm_info *)id->driver_data; - ret = devm_pwmchip_add(dev, chip); - if (ret) - return ret; + for (i = 0; i < info->nr; i++) { + /* + * No need to check for pcim_iomap_table() failure, + * pcim_iomap_regions() already does it for us. + */ + ret = dwc_pwm_init_one(dev, pcim_iomap_table(pci)[0], i * info->size); + if (ret) + return ret; + } pm_runtime_put(dev); pm_runtime_allow(dev); @@ -108,7 +128,7 @@ static int dwc_pwm_resume(struct device *dev) static DEFINE_SIMPLE_DEV_PM_OPS(dwc_pwm_pm_ops, dwc_pwm_suspend, dwc_pwm_resume); static const struct pci_device_id dwc_pwm_id_table[] = { - { PCI_VDEVICE(INTEL, 0x4bb7) }, /* Elkhart Lake */ + { PCI_VDEVICE(INTEL, 0x4bb7), (kernel_ulong_t)&ehl_pwm_info }, { } /* Terminating Entry */ }; MODULE_DEVICE_TABLE(pci, dwc_pwm_id_table); diff --git a/drivers/pwm/pwm-dwc.h b/drivers/pwm/pwm-dwc.h index 5887371803fd8..a8b074841ae80 100644 --- a/drivers/pwm/pwm-dwc.h +++ b/drivers/pwm/pwm-dwc.h @@ -33,6 +33,11 @@ MODULE_IMPORT_NS(dwc_pwm); #define DWC_TIM_CTRL_INT_MASK BIT(2) #define DWC_TIM_CTRL_PWM BIT(3) +struct dwc_pwm_info { + unsigned int nr; + unsigned int size; +}; + struct dwc_pwm_ctx { u32 cnt; u32 cnt2; |