[PATCH v2 1/5] dt-bindings: gpio: Add a binding header for the MSC313 GPIO driver

From: Daniel Palmer <daniel@0x0f.com>
To: linux-gpio@vger.kernel.org
Cc: devicetree@vger.kernel.org, arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linus.walleij@linaro.org,
	Daniel Palmer <daniel@0x0f.com>
Subject: [PATCH v2 1/5] dt-bindings: gpio: Add a binding header for the MSC313 GPIO driver
Date: Mon, 19 Oct 2020 23:10:04 +0900	[thread overview]
Message-ID: <20201019141008.871177-2-daniel@0x0f.com> (raw)
In-Reply-To: <20201019141008.871177-1-daniel@0x0f.com>

Header adds defines for the gpio number of each pin
from the driver view. The gpio block seems to support 128 lines
but what line is mapped to a physical pin depends on the chip.
The driver itself uses the index of a pin's offset in an array
of the possible offsets for a chip as the gpio number.

The defines remove the need to work out that index to consume
a pin in the device tree.

Signed-off-by: Daniel Palmer <daniel@0x0f.com>
---
 MAINTAINERS                            |  1 +
 include/dt-bindings/gpio/msc313-gpio.h | 95 ++++++++++++++++++++++++++
 2 files changed, 96 insertions(+)
 create mode 100644 include/dt-bindings/gpio/msc313-gpio.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 3f345f36c22c..a188fae8c04e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2132,6 +2132,7 @@ W:	http://linux-chenxing.org/
 F:	Documentation/devicetree/bindings/arm/mstar/*
 F:	arch/arm/boot/dts/mstar-*
 F:	arch/arm/mach-mstar/
+F:	include/dt-bindings/gpio/msc313-gpio.h
 
 ARM/NEC MOBILEPRO 900/c MACHINE SUPPORT
 M:	Michael Petchkovsky <mkpetch@internode.on.net>
diff --git a/include/dt-bindings/gpio/msc313-gpio.h b/include/dt-bindings/gpio/msc313-gpio.h
new file mode 100644
index 000000000000..9b8cd6ffb7c4
--- /dev/null
+++ b/include/dt-bindings/gpio/msc313-gpio.h
@@ -0,0 +1,95 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause */
+/*
+ * GPIO definitions for MStar/SigmaStar MSC313 and later SoCs
+ *
+ * Copyright (C) 2020 Daniel Palmer <daniel@thingy.jp>
+ */
+
+#ifndef _DT_BINDINGS_MSC313_GPIO_H
+#define _DT_BINDINGS_MSC313_GPIO_H
+
+/* pin names for fuart, same for all SoCs so far */
+#define MSC313_PINNAME_FUART_RX		"fuart_rx"
+#define MSC313_PINNAME_FUART_TX		"fuart_tx"
+#define MSC313_PINNAME_FUART_CTS	"fuart_cts"
+#define MSC313_PINNAME_FUART_RTS	"fuart_rts"
+
+/* pin names for sr, mercury5 is different */
+#define MSC313_PINNAME_SR_IO2		"sr_io2"
+#define MSC313_PINNAME_SR_IO3		"sr_io3"
+#define MSC313_PINNAME_SR_IO4		"sr_io4"
+#define MSC313_PINNAME_SR_IO5		"sr_io5"
+#define MSC313_PINNAME_SR_IO6		"sr_io6"
+#define MSC313_PINNAME_SR_IO7		"sr_io7"
+#define MSC313_PINNAME_SR_IO8		"sr_io8"
+#define MSC313_PINNAME_SR_IO9		"sr_io9"
+#define MSC313_PINNAME_SR_IO10		"sr_io10"
+#define MSC313_PINNAME_SR_IO11		"sr_io11"
+#define MSC313_PINNAME_SR_IO12		"sr_io12"
+#define MSC313_PINNAME_SR_IO13		"sr_io13"
+#define MSC313_PINNAME_SR_IO14		"sr_io14"
+#define MSC313_PINNAME_SR_IO15		"sr_io15"
+#define MSC313_PINNAME_SR_IO16		"sr_io16"
+#define MSC313_PINNAME_SR_IO17		"sr_io17"
+
+/* pin names for sd, same for all SoCs so far */
+#define MSC313_PINNAME_SD_CLK		"sd_clk"
+#define MSC313_PINNAME_SD_CMD		"sd_cmd"
+#define MSC313_PINNAME_SD_D0		"sd_d0"
+#define MSC313_PINNAME_SD_D1		"sd_d1"
+#define MSC313_PINNAME_SD_D2		"sd_d2"
+#define MSC313_PINNAME_SD_D3		"sd_d3"
+
+/* pin names for i2c1, same for all SoCs so for */
+#define MSC313_PINNAME_I2C1_SCL		"i2c1_scl"
+#define MSC313_PINNAME_I2C1_SCA		"i2c1_sda"
+
+/* pin names for spi0, same for all SoCs so far */
+#define MSC313_PINNAME_SPI0_CZ		"spi0_cz"
+#define MSC313_PINNAME_SPI0_CK		"spi0_ck"
+#define MSC313_PINNAME_SPI0_DI		"spi0_di"
+#define MSC313_PINNAME_SPI0_DO		"spi0_do"
+
+#define MSC313_GPIO_FUART	0
+#define MSC313_GPIO_FUART_RX	(MSC313_GPIO_FUART + 0)
+#define MSC313_GPIO_FUART_TX	(MSC313_GPIO_FUART + 1)
+#define MSC313_GPIO_FUART_CTS	(MSC313_GPIO_FUART + 2)
+#define MSC313_GPIO_FUART_RTS	(MSC313_GPIO_FUART + 3)
+
+#define MSC313_GPIO_SR		(MSC313_GPIO_FUART_RTS + 1)
+#define MSC313_GPIO_SR_IO2	(MSC313_GPIO_SR + 0)
+#define MSC313_GPIO_SR_IO3	(MSC313_GPIO_SR + 1)
+#define MSC313_GPIO_SR_IO4	(MSC313_GPIO_SR + 2)
+#define MSC313_GPIO_SR_IO5	(MSC313_GPIO_SR + 3)
+#define MSC313_GPIO_SR_IO6	(MSC313_GPIO_SR + 4)
+#define MSC313_GPIO_SR_IO7	(MSC313_GPIO_SR + 5)
+#define MSC313_GPIO_SR_IO8	(MSC313_GPIO_SR + 6)
+#define MSC313_GPIO_SR_IO9	(MSC313_GPIO_SR + 7)
+#define MSC313_GPIO_SR_IO10	(MSC313_GPIO_SR + 8)
+#define MSC313_GPIO_SR_IO11	(MSC313_GPIO_SR + 9)
+#define MSC313_GPIO_SR_IO12	(MSC313_GPIO_SR + 10)
+#define MSC313_GPIO_SR_IO13	(MSC313_GPIO_SR + 11)
+#define MSC313_GPIO_SR_IO14	(MSC313_GPIO_SR + 12)
+#define MSC313_GPIO_SR_IO15	(MSC313_GPIO_SR + 13)
+#define MSC313_GPIO_SR_IO16	(MSC313_GPIO_SR + 14)
+#define MSC313_GPIO_SR_IO17	(MSC313_GPIO_SR + 15)
+
+#define MSC313_GPIO_SD		(MSC313_GPIO_SR_IO17 + 1)
+#define MSC313_GPIO_SD_CLK	(MSC313_GPIO_SD + 0)
+#define MSC313_GPIO_SD_CMD	(MSC313_GPIO_SD + 1)
+#define MSC313_GPIO_SD_D0	(MSC313_GPIO_SD + 2)
+#define MSC313_GPIO_SD_D1	(MSC313_GPIO_SD + 3)
+#define MSC313_GPIO_SD_D2	(MSC313_GPIO_SD + 4)
+#define MSC313_GPIO_SD_D3	(MSC313_GPIO_SD + 5)
+
+#define MSC313_GPIO_I2C1	(MSC313_GPIO_SD_D3 + 1)
+#define MSC313_GPIO_I2C1_SCL	(MSC313_GPIO_I2C1 + 0)
+#define MSC313_GPIO_I2C1_SDA	(MSC313_GPIO_I2C1 + 1)
+
+#define MSC313_GPIO_SPI0	(MSC313_GPIO_I2C1_SDA + 1)
+#define MSC313_GPIO_SPI0_CZ	(MSC313_GPIO_SPI0 + 0)
+#define MSC313_GPIO_SPI0_CK	(MSC313_GPIO_SPI0 + 1)
+#define MSC313_GPIO_SPI0_DI	(MSC313_GPIO_SPI0 + 2)
+#define MSC313_GPIO_SPI0_DO	(MSC313_GPIO_SPI0 + 3)
+
+#endif /* _DT_BINDINGS_MSC313_GPIO_H */
-- 
2.28.0

