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From: "Maciej W. Rozycki" <macro@orcam.me.uk>
To: Nikolai Zhubr <zhubr.2@gmail.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"H. Peter Anvin" <hpa@zytor.com>
Cc: Arnd Bergmann <arnd@kernel.org>,
	x86@kernel.org, linux-pci@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH RFC 1/2] x86/PCI: Disambiguate SiS85C503 PIRQ router code entities
Date: Thu, 24 Jun 2021 01:38:59 +0200 (CEST)	[thread overview]
Message-ID: <alpine.DEB.2.21.2106240058590.37803@angie.orcam.me.uk> (raw)
In-Reply-To: <alpine.DEB.2.21.2106240047560.37803@angie.orcam.me.uk>

In preparation to adding support for the SiS85C497 PIRQ router add `503' 
to the names of SiS85C503 PIRQ router code entities so that they clearly 
indicate which device they refer to.

Also restructure `sis_router_probe' such that new device IDs will be 
just new switch cases.

No functional change.

Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
---
 arch/x86/pci/irq.c |   33 ++++++++++++++++++---------------
 1 file changed, 18 insertions(+), 15 deletions(-)

linux-x86-pirq-router-sis85c503.diff
Index: linux-macro-ide/arch/x86/pci/irq.c
===================================================================
--- linux-macro-ide.orig/arch/x86/pci/irq.c
+++ linux-macro-ide/arch/x86/pci/irq.c
@@ -389,11 +389,12 @@ static int pirq_cyrix_set(struct pci_dev
  *				bit 6-4 are probably unused, not like 5595
  */
 
-#define PIRQ_SIS_IRQ_MASK	0x0f
-#define PIRQ_SIS_IRQ_DISABLE	0x80
-#define PIRQ_SIS_USB_ENABLE	0x40
+#define PIRQ_SIS503_IRQ_MASK	0x0f
+#define PIRQ_SIS503_IRQ_DISABLE	0x80
+#define PIRQ_SIS503_USB_ENABLE	0x40
 
-static int pirq_sis_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
+static int pirq_sis503_get(struct pci_dev *router, struct pci_dev *dev,
+			   int pirq)
 {
 	u8 x;
 	int reg;
@@ -402,10 +403,11 @@ static int pirq_sis_get(struct pci_dev *
 	if (reg >= 0x01 && reg <= 0x04)
 		reg += 0x40;
 	pci_read_config_byte(router, reg, &x);
-	return (x & PIRQ_SIS_IRQ_DISABLE) ? 0 : (x & PIRQ_SIS_IRQ_MASK);
+	return (x & PIRQ_SIS503_IRQ_DISABLE) ? 0 : (x & PIRQ_SIS503_IRQ_MASK);
 }
 
-static int pirq_sis_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
+static int pirq_sis503_set(struct pci_dev *router, struct pci_dev *dev,
+			   int pirq, int irq)
 {
 	u8 x;
 	int reg;
@@ -414,8 +416,8 @@ static int pirq_sis_set(struct pci_dev *
 	if (reg >= 0x01 && reg <= 0x04)
 		reg += 0x40;
 	pci_read_config_byte(router, reg, &x);
-	x &= ~(PIRQ_SIS_IRQ_MASK | PIRQ_SIS_IRQ_DISABLE);
-	x |= irq ? irq: PIRQ_SIS_IRQ_DISABLE;
+	x &= ~(PIRQ_SIS503_IRQ_MASK | PIRQ_SIS503_IRQ_DISABLE);
+	x |= irq ? irq : PIRQ_SIS503_IRQ_DISABLE;
 	pci_write_config_byte(router, reg, x);
 	return 1;
 }
@@ -697,13 +699,14 @@ static __init int serverworks_router_pro
 
 static __init int sis_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
 {
-	if (device != PCI_DEVICE_ID_SI_503)
-		return 0;
-
-	r->name = "SIS";
-	r->get = pirq_sis_get;
-	r->set = pirq_sis_set;
-	return 1;
+	switch (device) {
+	case PCI_DEVICE_ID_SI_503:
+		r->name = "SiS85C503";
+		r->get = pirq_sis503_get;
+		r->set = pirq_sis503_set;
+		return 1;
+	}
+	return 0;
 }
 
 static __init int cyrix_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)

  reply	other threads:[~2021-06-23 23:46 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-23 23:38 [PATCH RFC 0/2] x86/PCI: SiS PIRQ router updates Maciej W. Rozycki
2021-06-23 23:38 ` Maciej W. Rozycki [this message]
2021-06-23 23:39 ` [PATCH RFC 2/2] x86/PCI: Add support for the SiS85C497 PIRQ router Maciej W. Rozycki
2021-07-02 17:27 ` [PATCH RFC 0/2] x86/PCI: SiS PIRQ router updates Nikolai Zhubr
2021-07-02 23:09   ` Maciej W. Rozycki
2021-07-05 10:54     ` Maciej W. Rozycki
2021-07-08 20:49 ` Maciej W. Rozycki

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