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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /include/linux/i2c/sx150x.h
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+/*
+ * Driver for the Semtech SX150x I2C GPIO Expanders
+ *
+ * Copyright (c) 2010, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+#ifndef __LINUX_I2C_SX150X_H
+#define __LINUX_I2C_SX150X_H
+
+/**
+ * struct sx150x_platform_data - config data for SX150x driver
+ * @gpio_base: The index number of the first GPIO assigned to this
+ * GPIO expander. The expander will create a block of
+ * consecutively numbered gpios beginning at the given base,
+ * with the size of the block depending on the model of the
+ * expander chip.
+ * @oscio_is_gpo: If set to true, the driver will configure OSCIO as a GPO
+ * instead of as an oscillator, increasing the size of the
+ * GP(I)O pool created by this expander by one. The
+ * output-only GPO pin will be added at the end of the block.
+ * @io_pullup_ena: A bit-mask which enables or disables the pull-up resistor
+ * for each IO line in the expander. Setting the bit at
+ * position n will enable the pull-up for the IO at
+ * the corresponding offset. For chips with fewer than
+ * 16 IO pins, high-end bits are ignored.
+ * @io_pulldn_ena: A bit-mask which enables-or disables the pull-down
+ * resistor for each IO line in the expander. Setting the
+ * bit at position n will enable the pull-down for the IO at
+ * the corresponding offset. For chips with fewer than
+ * 16 IO pins, high-end bits are ignored.
+ * @io_open_drain_ena: A bit-mask which enables-or disables open-drain
+ * operation for each IO line in the expander. Setting the
+ * bit at position n enables open-drain operation for
+ * the IO at the corresponding offset. Clearing the bit
+ * enables regular push-pull operation for that IO.
+ * For chips with fewer than 16 IO pins, high-end bits
+ * are ignored.
+ * @io_polarity: A bit-mask which enables polarity inversion for each IO line
+ * in the expander. Setting the bit at position n inverts
+ * the polarity of that IO line, while clearing it results
+ * in normal polarity. For chips with fewer than 16 IO pins,
+ * high-end bits are ignored.
+ * @irq_summary: The 'summary IRQ' line to which the GPIO expander's INT line
+ * is connected, via which it reports interrupt events
+ * across all GPIO lines. This must be a real,
+ * pre-existing IRQ line.
+ * Setting this value < 0 disables the irq_chip functionality
+ * of the driver.
+ * @irq_base: The first 'virtual IRQ' line at which our block of GPIO-based
+ * IRQ lines will appear. Similarly to gpio_base, the expander
+ * will create a block of irqs beginning at this number.
+ * This value is ignored if irq_summary is < 0.
+ * @reset_during_probe: If set to true, the driver will trigger a full
+ * reset of the chip at the beginning of the probe
+ * in order to place it in a known state.
+ */
+struct sx150x_platform_data {
+ unsigned gpio_base;
+ bool oscio_is_gpo;
+ u16 io_pullup_ena;
+ u16 io_pulldn_ena;
+ u16 io_open_drain_ena;
+ u16 io_polarity;
+ int irq_summary;
+ unsigned irq_base;
+ bool reset_during_probe;
+};
+
+#endif /* __LINUX_I2C_SX150X_H */