1 files changed, 147 insertions, 53 deletions

diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c
index 592b465e981e..6dc1096d3d34 100644
--- a/drivers/pinctrl/intel/pinctrl-intel.c
+++ b/drivers/pinctrl/intel/pinctrl-intel.c
@@ -117,6 +117,7 @@ struct intel_pinctrl {
 };
 
 #define pin_to_padno(c, p)	((p) - (c)->pin_base)
+#define padgroup_offset(g, p)	((p) - (g)->base)
 
 static struct intel_community *intel_get_community(struct intel_pinctrl *pctrl,
 						   unsigned pin)
@@ -135,6 +136,22 @@ static struct intel_community *intel_get_community(struct intel_pinctrl *pctrl,
 	return NULL;
 }
 
+static const struct intel_padgroup *
+intel_community_get_padgroup(const struct intel_community *community,
+			     unsigned pin)
+{
+	int i;
+
+	for (i = 0; i < community->ngpps; i++) {
+		const struct intel_padgroup *padgrp = &community->gpps[i];
+
+		if (pin >= padgrp->base && pin < padgrp->base + padgrp->size)
+			return padgrp;
+	}
+
+	return NULL;
+}
+
 static void __iomem *intel_get_padcfg(struct intel_pinctrl *pctrl, unsigned pin,
 				      unsigned reg)
 {
@@ -158,7 +175,8 @@ static void __iomem *intel_get_padcfg(struct intel_pinctrl *pctrl, unsigned pin,
 static bool intel_pad_owned_by_host(struct intel_pinctrl *pctrl, unsigned pin)
 {
 	const struct intel_community *community;
-	unsigned padno, gpp, offset, group;
+	const struct intel_padgroup *padgrp;
+	unsigned gpp, offset, gpp_offset;
 	void __iomem *padown;
 
 	community = intel_get_community(pctrl, pin);
@@ -167,19 +185,23 @@ static bool intel_pad_owned_by_host(struct intel_pinctrl *pctrl, unsigned pin)
 	if (!community->padown_offset)
 		return true;
 
-	padno = pin_to_padno(community, pin);
-	group = padno / community->gpp_size;
-	gpp = PADOWN_GPP(padno % community->gpp_size);
-	offset = community->padown_offset + 0x10 * group + gpp * 4;
+	padgrp = intel_community_get_padgroup(community, pin);
+	if (!padgrp)
+		return false;
+
+	gpp_offset = padgroup_offset(padgrp, pin);
+	gpp = PADOWN_GPP(gpp_offset);
+	offset = community->padown_offset + padgrp->padown_num * 4 + gpp * 4;
 	padown = community->regs + offset;
 
-	return !(readl(padown) & PADOWN_MASK(padno));
+	return !(readl(padown) & PADOWN_MASK(gpp_offset));
 }
 
 static bool intel_pad_acpi_mode(struct intel_pinctrl *pctrl, unsigned pin)
 {
 	const struct intel_community *community;
-	unsigned padno, gpp, offset;
+	const struct intel_padgroup *padgrp;
+	unsigned offset, gpp_offset;
 	void __iomem *hostown;
 
 	community = intel_get_community(pctrl, pin);
@@ -188,18 +210,22 @@ static bool intel_pad_acpi_mode(struct intel_pinctrl *pctrl, unsigned pin)
 	if (!community->hostown_offset)
 		return false;
 
-	padno = pin_to_padno(community, pin);
-	gpp = padno / community->gpp_size;
-	offset = community->hostown_offset + gpp * 4;
+	padgrp = intel_community_get_padgroup(community, pin);
+	if (!padgrp)
+		return true;
+
+	gpp_offset = padgroup_offset(padgrp, pin);
+	offset = community->hostown_offset + padgrp->reg_num * 4;
 	hostown = community->regs + offset;
 
-	return !(readl(hostown) & BIT(padno % community->gpp_size));
+	return !(readl(hostown) & BIT(gpp_offset));
 }
 
 static bool intel_pad_locked(struct intel_pinctrl *pctrl, unsigned pin)
 {
 	struct intel_community *community;
-	unsigned padno, gpp, offset;
+	const struct intel_padgroup *padgrp;
+	unsigned offset, gpp_offset;
 	u32 value;
 
 	community = intel_get_community(pctrl, pin);
@@ -208,22 +234,25 @@ static bool intel_pad_locked(struct intel_pinctrl *pctrl, unsigned pin)
 	if (!community->padcfglock_offset)
 		return false;
 
-	padno = pin_to_padno(community, pin);
-	gpp = padno / community->gpp_size;
+	padgrp = intel_community_get_padgroup(community, pin);
+	if (!padgrp)
+		return true;
+
+	gpp_offset = padgroup_offset(padgrp, pin);
 
 	/*
 	 * If PADCFGLOCK and PADCFGLOCKTX bits are both clear for this pad,
 	 * the pad is considered unlocked. Any other case means that it is
 	 * either fully or partially locked and we don't touch it.
 	 */
-	offset = community->padcfglock_offset + gpp * 8;
+	offset = community->padcfglock_offset + padgrp->reg_num * 8;
 	value = readl(community->regs + offset);
-	if (value & BIT(pin % community->gpp_size))
+	if (value & BIT(gpp_offset))
 		return true;
 
-	offset = community->padcfglock_offset + 4 + gpp * 8;
+	offset = community->padcfglock_offset + 4 + padgrp->reg_num * 8;
 	value = readl(community->regs + offset);
-	if (value & BIT(pin % community->gpp_size))
+	if (value & BIT(gpp_offset))
 		return true;
 
 	return false;
@@ -369,7 +398,11 @@ static int intel_pinmux_set_mux(struct pinctrl_dev *pctldev, unsigned function,
 		value = readl(padcfg0);
 
 		value &= ~PADCFG0_PMODE_MASK;
-		value |= grp->mode << PADCFG0_PMODE_SHIFT;
+
+		if (grp->modes)
+			value |= grp->modes[i] << PADCFG0_PMODE_SHIFT;
+		else
+			value |= grp->mode << PADCFG0_PMODE_SHIFT;
 
 		writel(value, padcfg0);
 	}
@@ -777,18 +810,22 @@ static void intel_gpio_irq_ack(struct irq_data *d)
 	const struct intel_community *community;
 	unsigned pin = irqd_to_hwirq(d);
 
-	raw_spin_lock(&pctrl->lock);
-
 	community = intel_get_community(pctrl, pin);
 	if (community) {
-		unsigned padno = pin_to_padno(community, pin);
-		unsigned gpp_offset = padno % community->gpp_size;
-		unsigned gpp = padno / community->gpp_size;
+		const struct intel_padgroup *padgrp;
+		unsigned gpp, gpp_offset;
+
+		padgrp = intel_community_get_padgroup(community, pin);
+		if (!padgrp)
+			return;
 
+		gpp = padgrp->reg_num;
+		gpp_offset = padgroup_offset(padgrp, pin);
+
+		raw_spin_lock(&pctrl->lock);
 		writel(BIT(gpp_offset), community->regs + GPI_IS + gpp * 4);
+		raw_spin_unlock(&pctrl->lock);
 	}
-
-	raw_spin_unlock(&pctrl->lock);
 }
 
 static void intel_gpio_irq_enable(struct irq_data *d)
@@ -797,27 +834,30 @@ static void intel_gpio_irq_enable(struct irq_data *d)
 	struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
 	const struct intel_community *community;
 	unsigned pin = irqd_to_hwirq(d);
-	unsigned long flags;
-
-	raw_spin_lock_irqsave(&pctrl->lock, flags);
 
 	community = intel_get_community(pctrl, pin);
 	if (community) {
-		unsigned padno = pin_to_padno(community, pin);
-		unsigned gpp_size = community->gpp_size;
-		unsigned gpp_offset = padno % gpp_size;
-		unsigned gpp = padno / gpp_size;
+		const struct intel_padgroup *padgrp;
+		unsigned gpp, gpp_offset;
+		unsigned long flags;
 		u32 value;
 
+		padgrp = intel_community_get_padgroup(community, pin);
+		if (!padgrp)
+			return;
+
+		gpp = padgrp->reg_num;
+		gpp_offset = padgroup_offset(padgrp, pin);
+
+		raw_spin_lock_irqsave(&pctrl->lock, flags);
 		/* Clear interrupt status first to avoid unexpected interrupt */
 		writel(BIT(gpp_offset), community->regs + GPI_IS + gpp * 4);
 
 		value = readl(community->regs + community->ie_offset + gpp * 4);
 		value |= BIT(gpp_offset);
 		writel(value, community->regs + community->ie_offset + gpp * 4);
+		raw_spin_unlock_irqrestore(&pctrl->lock, flags);
 	}
-
-	raw_spin_unlock_irqrestore(&pctrl->lock, flags);
 }
 
 static void intel_gpio_irq_mask_unmask(struct irq_data *d, bool mask)
@@ -826,28 +866,33 @@ static void intel_gpio_irq_mask_unmask(struct irq_data *d, bool mask)
 	struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
 	const struct intel_community *community;
 	unsigned pin = irqd_to_hwirq(d);
-	unsigned long flags;
-
-	raw_spin_lock_irqsave(&pctrl->lock, flags);
 
 	community = intel_get_community(pctrl, pin);
 	if (community) {
-		unsigned padno = pin_to_padno(community, pin);
-		unsigned gpp_offset = padno % community->gpp_size;
-		unsigned gpp = padno / community->gpp_size;
+		const struct intel_padgroup *padgrp;
+		unsigned gpp, gpp_offset;
+		unsigned long flags;
 		void __iomem *reg;
 		u32 value;
 
+		padgrp = intel_community_get_padgroup(community, pin);
+		if (!padgrp)
+			return;
+
+		gpp = padgrp->reg_num;
+		gpp_offset = padgroup_offset(padgrp, pin);
+
 		reg = community->regs + community->ie_offset + gpp * 4;
+
+		raw_spin_lock_irqsave(&pctrl->lock, flags);
 		value = readl(reg);
 		if (mask)
 			value &= ~BIT(gpp_offset);
 		else
 			value |= BIT(gpp_offset);
 		writel(value, reg);
+		raw_spin_unlock_irqrestore(&pctrl->lock, flags);
 	}
-
-	raw_spin_unlock_irqrestore(&pctrl->lock, flags);
 }
 
 static void intel_gpio_irq_mask(struct irq_data *d)
@@ -938,23 +983,20 @@ static irqreturn_t intel_gpio_community_irq_handler(struct intel_pinctrl *pctrl,
 	int gpp;
 
 	for (gpp = 0; gpp < community->ngpps; gpp++) {
+		const struct intel_padgroup *padgrp = &community->gpps[gpp];
 		unsigned long pending, enabled, gpp_offset;
 
-		pending = readl(community->regs + GPI_IS + gpp * 4);
+		pending = readl(community->regs + GPI_IS + padgrp->reg_num * 4);
 		enabled = readl(community->regs + community->ie_offset +
-				gpp * 4);
+				padgrp->reg_num * 4);
 
 		/* Only interrupts that are enabled */
 		pending &= enabled;
 
-		for_each_set_bit(gpp_offset, &pending, community->gpp_size) {
+		for_each_set_bit(gpp_offset, &pending, padgrp->size) {
 			unsigned padno, irq;
 
-			/*
-			 * The last group in community can have less pins
-			 * than NPADS_IN_GPP.
-			 */
-			padno = gpp_offset + gpp * community->gpp_size;
+			padno = padgrp->base - community->pin_base + gpp_offset;
 			if (padno >= community->npins)
 				break;
 
@@ -1045,6 +1087,56 @@ static int intel_gpio_probe(struct intel_pinctrl *pctrl, int irq)
 	return 0;
 }
 
+static int intel_pinctrl_add_padgroups(struct intel_pinctrl *pctrl,
+				       struct intel_community *community)
+{
+	struct intel_padgroup *gpps;
+	unsigned npins = community->npins;
+	unsigned padown_num = 0;
+	size_t ngpps, i;
+
+	if (community->gpps)
+		ngpps = community->ngpps;
+	else
+		ngpps = DIV_ROUND_UP(community->npins, community->gpp_size);
+
+	gpps = devm_kcalloc(pctrl->dev, ngpps, sizeof(*gpps), GFP_KERNEL);
+	if (!gpps)
+		return -ENOMEM;
+
+	for (i = 0; i < ngpps; i++) {
+		if (community->gpps) {
+			gpps[i] = community->gpps[i];
+		} else {
+			unsigned gpp_size = community->gpp_size;
+
+			gpps[i].reg_num = i;
+			gpps[i].base = community->pin_base + i * gpp_size;
+			gpps[i].size = min(gpp_size, npins);
+			npins -= gpps[i].size;
+		}
+
+		if (gpps[i].size > 32)
+			return -EINVAL;
+
+		gpps[i].padown_num = padown_num;
+
+		/*
+		 * In older hardware the number of padown registers per
+		 * group is fixed regardless of the group size.
+		 */
+		if (community->gpp_num_padown_regs)
+			padown_num += community->gpp_num_padown_regs;
+		else
+			padown_num += DIV_ROUND_UP(gpps[i].size * 4, 32);
+	}
+
+	community->ngpps = ngpps;
+	community->gpps = gpps;
+
+	return 0;
+}
+
 static int intel_pinctrl_pm_init(struct intel_pinctrl *pctrl)
 {
 #ifdef CONFIG_PM_SLEEP
@@ -1142,8 +1234,10 @@ int intel_pinctrl_probe(struct platform_device *pdev,
 
 		community->regs = regs;
 		community->pad_regs = regs + padbar;
-		community->ngpps = DIV_ROUND_UP(community->npins,
-						community->gpp_size);
+
+		ret = intel_pinctrl_add_padgroups(pctrl, community);
+		if (ret)
+			return ret;
 	}
 
 	irq = platform_get_irq(pdev, 0);