1 // SPDX-License-Identifier: GPL-2.0-only
3  * tegra20_das.c - Tegra20 DAS driver
6  * Copyright (C) 2010 - NVIDIA, Inc.
17 #define DRV_NAME "tegra20-das"
85  * DAS: Digital audio switch (HW module controlled by this driver)
89  * The Tegra DAS is a mux/cross-bar which can connect each DAP to a specific
99 static inline void tegra20_das_write(struct tegra20_das *das, u32 reg, u32 val)  in tegra20_das_write()  argument
101 	regmap_write(das->regmap, reg, val);  in tegra20_das_write()
104 static void tegra20_das_connect_dap_to_dac(struct tegra20_das *das, int dap, int dac)  in tegra20_das_connect_dap_to_dac()  argument
113 	tegra20_das_write(das, addr, reg);  in tegra20_das_connect_dap_to_dac()
116 static void tegra20_das_connect_dac_to_dap(struct tegra20_das *das, int dac, int dap)  in tegra20_das_connect_dac_to_dap()  argument
127 	tegra20_das_write(das, addr, reg);  in tegra20_das_connect_dac_to_dap()
132 	 (TEGRA20_DAS_##name##_STRIDE * (TEGRA20_DAS_##name##_COUNT - 1)))
158 	struct tegra20_das *das;  in tegra20_das_probe()  local
160 	das = devm_kzalloc(&pdev->dev, sizeof(struct tegra20_das), GFP_KERNEL);  in tegra20_das_probe()
161 	if (!das)  in tegra20_das_probe()
162 		return -ENOMEM;  in tegra20_das_probe()
168 	das->regmap = devm_regmap_init_mmio(&pdev->dev, regs,  in tegra20_das_probe()
170 	if (IS_ERR(das->regmap)) {  in tegra20_das_probe()
171 		dev_err(&pdev->dev, "regmap init failed\n");  in tegra20_das_probe()
172 		return PTR_ERR(das->regmap);  in tegra20_das_probe()
175 	tegra20_das_connect_dap_to_dac(das, TEGRA20_DAS_DAP_ID_1,  in tegra20_das_probe()
177 	tegra20_das_connect_dac_to_dap(das, TEGRA20_DAS_DAC_ID_1,  in tegra20_das_probe()
179 	tegra20_das_connect_dap_to_dac(das, TEGRA20_DAS_DAP_ID_3,  in tegra20_das_probe()
181 	tegra20_das_connect_dac_to_dap(das, TEGRA20_DAS_DAC_ID_3,  in tegra20_das_probe()
188 	{ .compatible = "nvidia,tegra20-das", },
202 MODULE_DESCRIPTION("Tegra20 DAS driver");