1 // SPDX-License-Identifier: GPL-2.0
7 #define pr_fmt(fmt) "nuvoton-kcs-bmc: " fmt
22 #define DEVICE_NAME	"npcm-kcs-bmc"
51  * Registers in this module are 8 bits. An 8-bit register must be accessed
52  * by an 8-bit read or write.
71 	struct regmap *map;  member
91 	int rc;  in npcm7xx_kcs_inb()  local
93 	rc = regmap_read(priv->map, reg, &val);  in npcm7xx_kcs_inb()
94 	WARN(rc != 0, "regmap_read() failed: %d\n", rc);  in npcm7xx_kcs_inb()
96 	return rc == 0 ? (u8)val : 0;  in npcm7xx_kcs_inb()
102 	int rc;  in npcm7xx_kcs_outb()  local
104 	rc = regmap_write(priv->map, reg, data);  in npcm7xx_kcs_outb()
105 	WARN(rc != 0, "regmap_write() failed: %d\n", rc);  in npcm7xx_kcs_outb()
111 	int rc;  in npcm7xx_kcs_updateb()  local
113 	rc = regmap_update_bits(priv->map, reg, mask, data);  in npcm7xx_kcs_updateb()
114 	WARN(rc != 0, "regmap_update_bits() failed: %d\n", rc);  in npcm7xx_kcs_updateb()
121 	regmap_update_bits(priv->map, priv->reg->ie, KCS_IE_IRQE | KCS_IE_HIRQE,  in npcm7xx_kcs_enable_channel()
130 		regmap_update_bits(priv->map, priv->reg->ctl, KCS_CTL_OBEIE,  in npcm7xx_kcs_irq_mask_update()
134 		regmap_update_bits(priv->map, priv->reg->ctl, KCS_CTL_IBFIE,  in npcm7xx_kcs_irq_mask_update()
148 	struct device *dev = &pdev->dev;  in npcm7xx_kcs_config_irq()
168 	struct device *dev = &pdev->dev;  in npcm7xx_kcs_probe()
172 	int rc;  in npcm7xx_kcs_probe()  local
174 	rc = of_property_read_u32(dev->of_node, "kcs_chan", &chan);  in npcm7xx_kcs_probe()
175 	if (rc != 0 || chan == 0 || chan > KCS_CHANNEL_MAX) {  in npcm7xx_kcs_probe()
177 		return -ENODEV;  in npcm7xx_kcs_probe()
180 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);  in npcm7xx_kcs_probe()
182 		return -ENOMEM;  in npcm7xx_kcs_probe()
184 	priv->map = syscon_node_to_regmap(dev->parent->of_node);  in npcm7xx_kcs_probe()
185 	if (IS_ERR(priv->map)) {  in npcm7xx_kcs_probe()
187 		return -ENODEV;  in npcm7xx_kcs_probe()
189 	priv->reg = &npcm7xx_kcs_reg_tbl[chan - 1];  in npcm7xx_kcs_probe()
191 	kcs_bmc = &priv->kcs_bmc;  in npcm7xx_kcs_probe()
192 	kcs_bmc->dev = &pdev->dev;  in npcm7xx_kcs_probe()
193 	kcs_bmc->channel = chan;  in npcm7xx_kcs_probe()
194 	kcs_bmc->ioreg.idr = priv->reg->dib;  in npcm7xx_kcs_probe()
195 	kcs_bmc->ioreg.odr = priv->reg->dob;  in npcm7xx_kcs_probe()
196 	kcs_bmc->ioreg.str = priv->reg->sts;  in npcm7xx_kcs_probe()
197 	kcs_bmc->ops = &npcm7xx_kcs_ops;  in npcm7xx_kcs_probe()
201 	rc = npcm7xx_kcs_config_irq(kcs_bmc, pdev);  in npcm7xx_kcs_probe()
202 	if (rc)  in npcm7xx_kcs_probe()
203 		return rc;  in npcm7xx_kcs_probe()
208 	rc = kcs_bmc_add_device(kcs_bmc);  in npcm7xx_kcs_probe()
209 	if (rc) {  in npcm7xx_kcs_probe()
210 		dev_warn(&pdev->dev, "Failed to register channel %d: %d\n", kcs_bmc->channel, rc);  in npcm7xx_kcs_probe()
211 		return rc;  in npcm7xx_kcs_probe()
216 		kcs_bmc->ioreg.idr, kcs_bmc->ioreg.odr, kcs_bmc->ioreg.str);  in npcm7xx_kcs_probe()
224 	struct kcs_bmc_device *kcs_bmc = &priv->kcs_bmc;  in npcm7xx_kcs_remove()
233 	{ .compatible = "nuvoton,npcm750-kcs-bmc" },
240 		.name		= DEVICE_NAME,