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/linux/Documentation/devicetree/bindings/i2c/
H A Dsnps,designware-i2c.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/i2c/snps,designware-i2c.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jarkko Nikula <jarkko.nikula@linux.intel.com>
13 - $ref: /schemas/i2c/i2c-controller.yaml#
14 - if:
19 const: mscc,ocelot-i2c
28 - description: Generic Synopsys DesignWare I2C controller
29 const: snps,designware-i2c
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/linux/drivers/i2c/busses/
H A Di2c-designware-master.c1 // SPDX-License-Identifier: GPL-2.0-or-later
28 #include "i2c-designware-core.h"
37 regmap_write(dev->map, DW_IC_TX_TL, dev->tx_fifo_depth / 2); in i2c_dw_configure_fifo_master()
38 regmap_write(dev->map, DW_IC_RX_TL, 0); in i2c_dw_configure_fifo_master()
41 regmap_write(dev->map, DW_IC_CON, dev->master_cfg); in i2c_dw_configure_fifo_master()
48 struct i2c_timings *t = &dev->timings; in i2c_dw_set_timings_master()
57 ret = regmap_read(dev->map, DW_IC_COMP_PARAM_1, &comp_param1); in i2c_dw_set_timings_master()
63 sda_falling_time = t->sda_fall_ns ?: 300; /* ns */ in i2c_dw_set_timings_master()
64 scl_falling_time = t->scl_fall_ns ?: 300; /* ns */ in i2c_dw_set_timings_master()
67 if (!dev->ss_hcnt || !dev->ss_lcnt) { in i2c_dw_set_timings_master()
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H A Di2c-designware-common.c1 // SPDX-License-Identifier: GPL-2.0-or-later
35 #include "i2c-designware-core.h"
63 "slave lost the bus while transmitting data to a remote master",
65 "incorrect slave-transmitter mode configuration",
72 *val = readl(dev->base + reg); in dw_reg_read()
81 writel(val, dev->base + reg); in dw_reg_write()
90 *val = swab32(readl(dev->base + reg)); in dw_reg_read_swab()
99 writel(swab32(val), dev->base + reg); in dw_reg_write_swab()
108 *val = readw(dev->base + reg) | in dw_reg_read_word()
109 (readw(dev->base + reg + 2) << 16); in dw_reg_read_word()
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