1 files changed, 81 insertions, 40 deletions

diff --git a/drivers/pwm/pwm-dwc.c b/drivers/pwm/pwm-dwc.c
index a4a057ae0..fb3eadf6f 100644
--- a/drivers/pwm/pwm-dwc.c
+++ b/drivers/pwm/pwm-dwc.c
@@ -25,39 +25,70 @@
 
 #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, struct dwc_pwm_drvdata *ddata, unsigned int idx)
 {
-	struct device *dev = &pci->dev;
+	struct pwm_chip *chip;
 	struct dwc_pwm *dwc;
 	int ret;
 
-	dwc = dwc_pwm_alloc(dev);
-	if (!dwc)
-		return -ENOMEM;
+	chip = dwc_pwm_alloc(dev);
+	if (IS_ERR(chip))
+		return PTR_ERR(chip);
 
-	ret = pcim_enable_device(pci);
-	if (ret) {
-		dev_err(dev, "Failed to enable device (%pe)\n", ERR_PTR(ret));
+	dwc = to_dwc_pwm(chip);
+	dwc->base = ddata->io_base + (ddata->info->size * idx);
+
+	ret = devm_pwmchip_add(dev, chip);
+	if (ret)
 		return ret;
-	}
+
+	ddata->chips[idx] = chip;
+	return 0;
+}
+
+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;
+	struct dwc_pwm_drvdata *ddata;
+	unsigned int idx;
+	int ret;
+
+	ret = pcim_enable_device(pci);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to enable device\n");
 
 	pci_set_master(pci);
 
 	ret = pcim_iomap_regions(pci, BIT(0), pci_name(pci));
-	if (ret) {
-		dev_err(dev, "Failed to iomap PCI BAR (%pe)\n", ERR_PTR(ret));
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to iomap PCI BAR\n");
 
-	dwc->base = pcim_iomap_table(pci)[0];
-	if (!dwc->base) {
-		dev_err(dev, "Base address missing\n");
+	info = (const struct dwc_pwm_info *)id->driver_data;
+	ddata = devm_kzalloc(dev, struct_size(ddata, chips, info->nr), GFP_KERNEL);
+	if (!ddata)
 		return -ENOMEM;
+
+	/*
+	 * No need to check for pcim_iomap_table() failure,
+	 * pcim_iomap_regions() already does it for us.
+	 */
+	ddata->io_base = pcim_iomap_table(pci)[0];
+	ddata->info = info;
+
+	for (idx = 0; idx < ddata->info->nr; idx++) {
+		ret = dwc_pwm_init_one(dev, ddata, idx);
+		if (ret)
+			return ret;
 	}
 
-	ret = devm_pwmchip_add(dev, &dwc->chip);
-	if (ret)
-		return ret;
+	dev_set_drvdata(dev, ddata);
 
 	pm_runtime_put(dev);
 	pm_runtime_allow(dev);
@@ -73,19 +104,24 @@ static void dwc_pwm_remove(struct pci_dev *pci)
 
 static int dwc_pwm_suspend(struct device *dev)
 {
-	struct pci_dev *pdev = container_of(dev, struct pci_dev, dev);
-	struct dwc_pwm *dwc = pci_get_drvdata(pdev);
-	int i;
-
-	for (i = 0; i < DWC_TIMERS_TOTAL; i++) {
-		if (dwc->chip.pwms[i].state.enabled) {
-			dev_err(dev, "PWM %u in use by consumer (%s)\n",
-				i, dwc->chip.pwms[i].label);
-			return -EBUSY;
+	struct dwc_pwm_drvdata *ddata = dev_get_drvdata(dev);
+	unsigned int idx;
+
+	for (idx = 0; idx < ddata->info->nr; idx++) {
+		struct pwm_chip *chip = ddata->chips[idx];
+		struct dwc_pwm *dwc = to_dwc_pwm(chip);
+		unsigned int i;
+
+		for (i = 0; i < DWC_TIMERS_TOTAL; i++) {
+			if (chip->pwms[i].state.enabled) {
+				dev_err(dev, "PWM %u in use by consumer (%s)\n",
+					i, chip->pwms[i].label);
+				return -EBUSY;
+			}
+			dwc->ctx[i].cnt = dwc_pwm_readl(dwc, DWC_TIM_LD_CNT(i));
+			dwc->ctx[i].cnt2 = dwc_pwm_readl(dwc, DWC_TIM_LD_CNT2(i));
+			dwc->ctx[i].ctrl = dwc_pwm_readl(dwc, DWC_TIM_CTRL(i));
 		}
-		dwc->ctx[i].cnt = dwc_pwm_readl(dwc, DWC_TIM_LD_CNT(i));
-		dwc->ctx[i].cnt2 = dwc_pwm_readl(dwc, DWC_TIM_LD_CNT2(i));
-		dwc->ctx[i].ctrl = dwc_pwm_readl(dwc, DWC_TIM_CTRL(i));
 	}
 
 	return 0;
@@ -93,14 +129,19 @@ static int dwc_pwm_suspend(struct device *dev)
 
 static int dwc_pwm_resume(struct device *dev)
 {
-	struct pci_dev *pdev = container_of(dev, struct pci_dev, dev);
-	struct dwc_pwm *dwc = pci_get_drvdata(pdev);
-	int i;
-
-	for (i = 0; i < DWC_TIMERS_TOTAL; i++) {
-		dwc_pwm_writel(dwc, dwc->ctx[i].cnt, DWC_TIM_LD_CNT(i));
-		dwc_pwm_writel(dwc, dwc->ctx[i].cnt2, DWC_TIM_LD_CNT2(i));
-		dwc_pwm_writel(dwc, dwc->ctx[i].ctrl, DWC_TIM_CTRL(i));
+	struct dwc_pwm_drvdata *ddata = dev_get_drvdata(dev);
+	unsigned int idx;
+
+	for (idx = 0; idx < ddata->info->nr; idx++) {
+		struct pwm_chip *chip = ddata->chips[idx];
+		struct dwc_pwm *dwc = to_dwc_pwm(chip);
+		unsigned int i;
+
+		for (i = 0; i < DWC_TIMERS_TOTAL; i++) {
+			dwc_pwm_writel(dwc, dwc->ctx[i].cnt, DWC_TIM_LD_CNT(i));
+			dwc_pwm_writel(dwc, dwc->ctx[i].cnt2, DWC_TIM_LD_CNT2(i));
+			dwc_pwm_writel(dwc, dwc->ctx[i].ctrl, DWC_TIM_CTRL(i));
+		}
 	}
 
 	return 0;
@@ -109,7 +150,7 @@ 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);