1 // SPDX-License-Identifier: GPL-2.0+
5  * Rockchip SARADC driver for U-Boot
25 	unsigned int ctrl;  member
41 int rockchip_saradc_channel_data(struct udevice *dev, int channel,  in rockchip_saradc_channel_data()  argument
44 	struct rockchip_saradc_priv *priv = dev_get_priv(dev);  in rockchip_saradc_channel_data()
45 	struct adc_uclass_platdata *uc_pdata = dev_get_uclass_platdata(dev);  in rockchip_saradc_channel_data()
47 	if (channel != priv->active_channel) {  in rockchip_saradc_channel_data()
49 		return -EINVAL;  in rockchip_saradc_channel_data()
52 	if ((readl(&priv->regs->ctrl) & SARADC_CTRL_IRQ_STATUS) !=  in rockchip_saradc_channel_data()
54 		return -EBUSY;  in rockchip_saradc_channel_data()
57 	*data = readl(&priv->regs->data);  in rockchip_saradc_channel_data()
58 	*data &= uc_pdata->data_mask;  in rockchip_saradc_channel_data()
61 	writel(0, &priv->regs->ctrl);  in rockchip_saradc_channel_data()
66 int rockchip_saradc_start_channel(struct udevice *dev, int channel)  in rockchip_saradc_start_channel()  argument
68 	struct rockchip_saradc_priv *priv = dev_get_priv(dev);  in rockchip_saradc_start_channel()
70 	if (channel < 0 || channel >= priv->data->num_channels) {  in rockchip_saradc_start_channel()
72 		return -EINVAL;  in rockchip_saradc_start_channel()
76 	writel(8, &priv->regs->dly_pu_soc);  in rockchip_saradc_start_channel()
80 	       SARADC_CTRL_IRQ_ENABLE, &priv->regs->ctrl);  in rockchip_saradc_start_channel()
82 	priv->active_channel = channel;  in rockchip_saradc_start_channel()
87 int rockchip_saradc_stop(struct udevice *dev)  in rockchip_saradc_stop()  argument
89 	struct rockchip_saradc_priv *priv = dev_get_priv(dev);  in rockchip_saradc_stop()
92 	writel(0, &priv->regs->ctrl);  in rockchip_saradc_stop()
94 	priv->active_channel = -1;  in rockchip_saradc_stop()
99 int rockchip_saradc_probe(struct udevice *dev)  in rockchip_saradc_probe()  argument
101 	struct rockchip_saradc_priv *priv = dev_get_priv(dev);  in rockchip_saradc_probe()
105 	ret = clk_get_by_index(dev, 0, &clk);  in rockchip_saradc_probe()
109 	ret = clk_set_rate(&clk, priv->data->clk_rate);  in rockchip_saradc_probe()
113 	priv->active_channel = -1;  in rockchip_saradc_probe()
118 int rockchip_saradc_ofdata_to_platdata(struct udevice *dev)  in rockchip_saradc_ofdata_to_platdata()  argument
120 	struct adc_uclass_platdata *uc_pdata = dev_get_uclass_platdata(dev);  in rockchip_saradc_ofdata_to_platdata()
121 	struct rockchip_saradc_priv *priv = dev_get_priv(dev);  in rockchip_saradc_ofdata_to_platdata()
124 	data = (struct rockchip_saradc_data *)dev_get_driver_data(dev);  in rockchip_saradc_ofdata_to_platdata()
125 	priv->regs = (struct rockchip_saradc_regs *)dev_read_addr(dev);  in rockchip_saradc_ofdata_to_platdata()
126 	if (priv->regs == (struct rockchip_saradc_regs *)FDT_ADDR_T_NONE) {  in rockchip_saradc_ofdata_to_platdata()
127 		pr_err("Dev: %s - can't get address!", dev->name);  in rockchip_saradc_ofdata_to_platdata()
128 		return -ENODATA;  in rockchip_saradc_ofdata_to_platdata()
131 	priv->data = data;  in rockchip_saradc_ofdata_to_platdata()
132 	uc_pdata->data_mask = (1 << priv->data->num_bits) - 1;;  in rockchip_saradc_ofdata_to_platdata()
133 	uc_pdata->data_format = ADC_DATA_FORMAT_BIN;  in rockchip_saradc_ofdata_to_platdata()
134 	uc_pdata->data_timeout_us = SARADC_TIMEOUT / 5;  in rockchip_saradc_ofdata_to_platdata()
135 	uc_pdata->channel_mask = (1 << priv->data->num_channels) - 1;  in rockchip_saradc_ofdata_to_platdata()
167 	{ .compatible = "rockchip,rk3066-tsadc",
169 	{ .compatible = "rockchip,rk3399-saradc",