summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-iop32x/i2c.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/arm/mach-iop32x/i2c.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/mach-iop32x/i2c.c')
-rw-r--r--arch/arm/mach-iop32x/i2c.c92
1 files changed, 92 insertions, 0 deletions
diff --git a/arch/arm/mach-iop32x/i2c.c b/arch/arm/mach-iop32x/i2c.c
new file mode 100644
index 000000000..e422286af
--- /dev/null
+++ b/arch/arm/mach-iop32x/i2c.c
@@ -0,0 +1,92 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * arch/arm/plat-iop/i2c.c
+ *
+ * Author: Nicolas Pitre <nico@cam.org>
+ * Copyright (C) 2001 MontaVista Software, Inc.
+ * Copyright (C) 2004 Intel Corporation.
+ */
+
+#include <linux/mm.h>
+#include <linux/init.h>
+#include <linux/major.h>
+#include <linux/fs.h>
+#include <linux/platform_device.h>
+#include <linux/serial.h>
+#include <linux/tty.h>
+#include <linux/serial_core.h>
+#include <linux/io.h>
+#include <linux/gpio/machine.h>
+#include <asm/page.h>
+#include <asm/mach/map.h>
+#include <asm/setup.h>
+#include <asm/memory.h>
+#include <asm/mach/arch.h>
+
+#include "hardware.h"
+#include "iop3xx.h"
+#include "irqs.h"
+
+/*
+ * Each of the I2C busses have corresponding GPIO lines, and the driver
+ * need to access these directly to drive the bus low at times.
+ */
+
+struct gpiod_lookup_table iop3xx_i2c0_gpio_lookup = {
+ .dev_id = "IOP3xx-I2C.0",
+ .table = {
+ GPIO_LOOKUP("gpio-iop", 7, "scl", GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP("gpio-iop", 6, "sda", GPIO_ACTIVE_HIGH),
+ { }
+ },
+};
+
+struct gpiod_lookup_table iop3xx_i2c1_gpio_lookup = {
+ .dev_id = "IOP3xx-I2C.1",
+ .table = {
+ GPIO_LOOKUP("gpio-iop", 5, "scl", GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP("gpio-iop", 4, "sda", GPIO_ACTIVE_HIGH),
+ { }
+ },
+};
+
+static struct resource iop3xx_i2c0_resources[] = {
+ [0] = {
+ .start = 0xfffff680,
+ .end = 0xfffff697,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = IRQ_IOP32X_I2C_0,
+ .end = IRQ_IOP32X_I2C_0,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+struct platform_device iop3xx_i2c0_device = {
+ .name = "IOP3xx-I2C",
+ .id = 0,
+ .num_resources = 2,
+ .resource = iop3xx_i2c0_resources,
+};
+
+
+static struct resource iop3xx_i2c1_resources[] = {
+ [0] = {
+ .start = 0xfffff6a0,
+ .end = 0xfffff6b7,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = IRQ_IOP32X_I2C_1,
+ .end = IRQ_IOP32X_I2C_1,
+ .flags = IORESOURCE_IRQ,
+ }
+};
+
+struct platform_device iop3xx_i2c1_device = {
+ .name = "IOP3xx-I2C",
+ .id = 1,
+ .num_resources = 2,
+ .resource = iop3xx_i2c1_resources,
+};