linux-kernel - [v1, 1/1] gpio: dts: aspeed: Add SGPIO driver

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Date:   Tue, 24 Sep 2019 15:07:01 -0400
From:   Hongwei Zhang <hongweiz@....com>
To:     Andrew Jeffery <andrew@...id.au>,
        Linus Walleij <linus.walleij@...aro.org>,
        <linux-gpio@...r.kernel.org>, Joel Stanley <joel@....id.au>
CC:     Hongwei Zhang <hongweiz@....com>, <devicetree@...r.kernel.org>,
        <linux-aspeed@...ts.ozlabs.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Benjamin Gaignard <benjamin.gaignard@...aro.org>,
        Doug Anderson <armlinux@...isordat.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Russell King <linux@...linux.org.uk>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: [v1, 1/1] gpio: dts: aspeed: Add SGPIO driver

Add SGPIO driver support for Aspeed AST2500 SoC.

Signed-off-by: Hongwei Zhang <hongweiz@....com>
---
 arch/arm/Kconfig                 |  2 ++
 arch/arm/boot/dts/aspeed-g5.dtsi | 16 +++++++++++++++-
 drivers/gpio/Kconfig             |  8 ++++++++
 drivers/gpio/Makefile            |  1 +
 4 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 2436021..c9f08ab 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1460,6 +1460,8 @@ config ARCH_NR_GPIO
 	default 416 if ARCH_SUNXI
 	default 392 if ARCH_U8500
 	default 352 if ARCH_VT8500
+	default 312 if MACH_ASPEED_G5
+	default 304 if MACH_ASPEED_G4
 	default 288 if ARCH_ROCKCHIP
 	default 264 if MACH_H4700
 	default 0
diff --git a/arch/arm/boot/dts/aspeed-g5.dtsi b/arch/arm/boot/dts/aspeed-g5.dtsi
index 00f05bd..85da7ea 100644
--- a/arch/arm/boot/dts/aspeed-g5.dtsi
+++ b/arch/arm/boot/dts/aspeed-g5.dtsi
@@ -311,7 +311,7 @@
 				#gpio-cells = <2>;
 				gpio-controller;
 				compatible = "aspeed,ast2500-gpio";
-				reg = <0x1e780000 0x1000>;
+				reg = <0x1e780000 0x200>;
 				interrupts = <20>;
 				gpio-ranges = <&pinctrl 0 0 232>;
 				clocks = <&syscon ASPEED_CLK_APB>;
@@ -319,6 +319,20 @@
 				#interrupt-cells = <2>;
 			};
 
+			sgpio: sgpio@...80200 {
+				#gpio-cells = <2>;
+				compatible = "aspeed,ast2500-sgpio";
+				gpio-controller;
+				interrupts = <40>;
+				reg = <0x1e780200 0x0100>;
+				clocks = <&syscon ASPEED_CLK_APB>;
+				interrupt-controller;
+				ngpios = <8>;
+				bus-frequency = <12000000>;
+				pinctrl-names = "default";
+				pinctrl-0 = <&pinctrl_sgpm_default>;
+			};
+
 			rtc: rtc@...81000 {
 				compatible = "aspeed,ast2500-rtc";
 				reg = <0x1e781000 0x18>;
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index bb13c26..e94f903 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -120,6 +120,14 @@ config GPIO_ASPEED
 	help
 	  Say Y here to support Aspeed AST2400 and AST2500 GPIO controllers.
 
+config SGPIO_ASPEED
+	bool "Aspeed SGPIO support"
+	depends on (ARCH_ASPEED || COMPILE_TEST) && OF_GPIO
+	select GPIO_GENERIC
+	select GPIOLIB_IRQCHIP
+	help
+	  Say Y here to support Aspeed AST2500 SGPIO functionality.
+
 config GPIO_ATH79
 	tristate "Atheros AR71XX/AR724X/AR913X GPIO support"
 	default y if ATH79
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index a4e9117..bebbd82 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -32,6 +32,7 @@ obj-$(CONFIG_GPIO_AMD_FCH)		+= gpio-amd-fch.o
 obj-$(CONFIG_GPIO_AMDPT)		+= gpio-amdpt.o
 obj-$(CONFIG_GPIO_ARIZONA)		+= gpio-arizona.o
 obj-$(CONFIG_GPIO_ASPEED)		+= gpio-aspeed.o
+obj-$(CONFIG_SGPIO_ASPEED)		+= sgpio-aspeed.o
 obj-$(CONFIG_GPIO_ATH79)		+= gpio-ath79.o
 obj-$(CONFIG_GPIO_BCM_KONA)		+= gpio-bcm-kona.o
 obj-$(CONFIG_GPIO_BD70528)		+= gpio-bd70528.o
-- 
2.7.4