/* * rl6347a.c - RL6347A class device shared support * * Copyright 2015 Realtek Semiconductor Corp. * * Author: Oder Chiou * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include "rl6347a.h" int rl6347a_hw_write(void *context, unsigned int reg, unsigned int value) { struct i2c_client *client = context; struct rl6347a_priv *rl6347a = i2c_get_clientdata(client); u8 data[4]; int ret, i; /* handle index registers */ if (reg <= 0xff) { rl6347a_hw_write(client, RL6347A_COEF_INDEX, reg); for (i = 0; i < rl6347a->index_cache_size; i++) { if (reg == rl6347a->index_cache[i].reg) { rl6347a->index_cache[i].def = value; break; } } reg = RL6347A_PROC_COEF; } data[0] = (reg >> 24) & 0xff; data[1] = (reg >> 16) & 0xff; /* * 4 bit VID: reg should be 0 * 12 bit VID: value should be 0 * So we use an OR operator to handle it rather than use if condition. */ data[2] = ((reg >> 8) & 0xff) | ((value >> 8) & 0xff); data[3] = value & 0xff; ret = i2c_master_send(client, data, 4); if (ret == 4) return 0; else dev_err(&client->dev, "I2C error %d\n", ret); if (ret < 0) return ret; else return -EIO; } EXPORT_SYMBOL_GPL(rl6347a_hw_write); int rl6347a_hw_read(void *context, unsigned int reg, unsigned int *value) { struct i2c_client *client = context; struct i2c_msg xfer[2]; int ret; __be32 be_reg; unsigned int index, vid, buf = 0x0; /* handle index registers */ if (reg <= 0xff) { rl6347a_hw_write(client, RL6347A_COEF_INDEX, reg); reg = RL6347A_PROC_COEF; } reg = reg | 0x80000; vid = (reg >> 8) & 0xfff; if (AC_VERB_GET_AMP_GAIN_MUTE == (vid & 0xf00)) { index = (reg >> 8) & 0xf; reg = (reg & ~0xf0f) | index; } be_reg = cpu_to_be32(reg); /* Write register */ xfer[0].addr = client->addr; xfer[0].flags = 0; xfer[0].len = 4; xfer[0].buf = (u8 *)&be_reg; /* Read data */ xfer[1].addr = client->addr; xfer[1].flags = I2C_M_RD; xfer[1].len = 4; xfer[1].buf = (u8 *)&buf; ret = i2c_transfer(client->adapter, xfer, 2); if (ret < 0) return ret; else if (ret != 2) return -EIO; *value = be32_to_cpu(buf); return 0; } EXPORT_SYMBOL_GPL(rl6347a_hw_read); MODULE_DESCRIPTION("RL6347A class device shared support"); MODULE_AUTHOR("Oder Chiou "); MODULE_LICENSE("GPL v2"); /option>
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authorChanwoo Choi <cw00.choi@samsung.com>2016-04-15 15:32:55 +0900
committerKrzysztof Kozlowski <k.kozlowski@samsung.com>2016-05-03 12:27:52 +0200
commit3f2129fd0daeaf9e60a51f9ebd2d9faabb437308 (patch)
tree3ac84364a532e7156c96fbb6f6ca7b8869952d5a
parentb04a62d3ade3591a70d161455fb132a410313cd2 (diff)
ARM: dts: exynos: Add support of Bus frequency using VDD_INT for exynos5422-odroidxu3
This patch adds the bus device tree nodes for INT (Internal) block to enable the AMBA bus frequency scaling and add the NoC (Network on Chip) Probe Device Tree node to measure the bandwidth for AMBA AXI bus. The WCORE bus bus is parent device in INT block using VDD_INT. Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Tested-by: Markus Reichl <m.reichl@fivetechno.de> Tested-by: Anand Moon <linux.amoon@gmail.com> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
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