1 // SPDX-License-Identifier: GPL-2.0
7 #define pr_fmt(fmt) "nuvoton-kcs-bmc: " fmt
22 #define DEVICE_NAME	"npcm-kcs-bmc"
50  * Registers in this module are 8 bits. An 8-bit register must be accessed
51  * by an 8-bit read or write.
68 	struct regmap *map;  member
83 	int rc;  in npcm7xx_kcs_inb()  local
85 	rc = regmap_read(priv->map, reg, &val);  in npcm7xx_kcs_inb()
86 	WARN(rc != 0, "regmap_read() failed: %d\n", rc);  in npcm7xx_kcs_inb()
88 	return rc == 0 ? (u8)val : 0;  in npcm7xx_kcs_inb()
94 	int rc;  in npcm7xx_kcs_outb()  local
96 	rc = regmap_write(priv->map, reg, data);  in npcm7xx_kcs_outb()
97 	WARN(rc != 0, "regmap_write() failed: %d\n", rc);  in npcm7xx_kcs_outb()
104 	regmap_update_bits(priv->map, priv->reg->ctl, KCS_CTL_IBFIE,  in npcm7xx_kcs_enable_channel()
107 	regmap_update_bits(priv->map, priv->reg->ie, KCS_IE_IRQE | KCS_IE_HIRQE,  in npcm7xx_kcs_enable_channel()
124 	struct device *dev = &pdev->dev;  in npcm7xx_kcs_config_irq()
137 	struct device *dev = &pdev->dev;  in npcm7xx_kcs_probe()
141 	int rc;  in npcm7xx_kcs_probe()  local
143 	rc = of_property_read_u32(dev->of_node, "kcs_chan", &chan);  in npcm7xx_kcs_probe()
144 	if (rc != 0 || chan == 0 || chan > KCS_CHANNEL_MAX) {  in npcm7xx_kcs_probe()
146 		return -ENODEV;  in npcm7xx_kcs_probe()
151 		return -ENOMEM;  in npcm7xx_kcs_probe()
154 	priv->map = syscon_node_to_regmap(dev->parent->of_node);  in npcm7xx_kcs_probe()
155 	if (IS_ERR(priv->map)) {  in npcm7xx_kcs_probe()
157 		return -ENODEV;  in npcm7xx_kcs_probe()
159 	priv->reg = &npcm7xx_kcs_reg_tbl[chan - 1];  in npcm7xx_kcs_probe()
161 	kcs_bmc->ioreg.idr = priv->reg->dib;  in npcm7xx_kcs_probe()
162 	kcs_bmc->ioreg.odr = priv->reg->dob;  in npcm7xx_kcs_probe()
163 	kcs_bmc->ioreg.str = priv->reg->sts;  in npcm7xx_kcs_probe()
164 	kcs_bmc->io_inputb = npcm7xx_kcs_inb;  in npcm7xx_kcs_probe()
165 	kcs_bmc->io_outputb = npcm7xx_kcs_outb;  in npcm7xx_kcs_probe()
170 	rc = npcm7xx_kcs_config_irq(kcs_bmc, pdev);  in npcm7xx_kcs_probe()
171 	if (rc)  in npcm7xx_kcs_probe()
172 		return rc;  in npcm7xx_kcs_probe()
174 	rc = misc_register(&kcs_bmc->miscdev);  in npcm7xx_kcs_probe()
175 	if (rc) {  in npcm7xx_kcs_probe()
177 		return rc;  in npcm7xx_kcs_probe()
182 		kcs_bmc->ioreg.idr, kcs_bmc->ioreg.odr, kcs_bmc->ioreg.str);  in npcm7xx_kcs_probe()
189 	struct kcs_bmc *kcs_bmc = dev_get_drvdata(&pdev->dev);  in npcm7xx_kcs_remove()
191 	misc_deregister(&kcs_bmc->miscdev);  in npcm7xx_kcs_remove()
197 	{ .compatible = "nuvoton,npcm750-kcs-bmc" },
204 		.name		= DEVICE_NAME,