1 // SPDX-License-Identifier: GPL-2.0-or-later
7 #include <linux/clk.h>
16 #include <linux/pinctrl/pinconf-generic.h>
21 #include <dt-bindings/pinctrl/k210-fpioa.h>
25 #include "pinctrl-utils.h"
28  * The K210 only implements 8 drive levels, even though
54 /* Strong pull up not implemented on K210 */
80  * struct k210_fpioa: Kendryte K210 FPIOA memory mapped registers
81  * @pins: 48 32-bits IO pin registers
99 	struct clk *clk;  member
100 	struct clk *pclk;
132  * no pins 48-55).
465 	{ "output-polarity-invert", PIN_CONFIG_OUTPUT_INVERT, 1 },
466 	{ "input-polarity-invert",  PIN_CONFIG_INPUT_INVERT, 1 },
487 	for (i = K210_PC_DRIVE_MAX; i >= 0; i--) {  in k210_pinconf_get_drive()
492 	return -EINVAL;  in k210_pinconf_get_drive()
500 	u32 mode = k210_pinconf_mode_id_to_mode[info->mode_id];  in k210_pinmux_set_pin_function()
503 	dev_dbg(pdata->dev, "set pin %u function %s (%u) -> 0x%08x\n",  in k210_pinmux_set_pin_function()
504 		pin, info->name, func, val);  in k210_pinmux_set_pin_function()
506 	writel(val, &pdata->fpioa->pins[pin]);  in k210_pinmux_set_pin_function()
514 	u32 val = readl(&pdata->fpioa->pins[pin]);  in k210_pinconf_set_param()
517 	dev_dbg(pdata->dev, "set pin %u param %u, arg 0x%x\n",  in k210_pinconf_set_param()
526 			return -EINVAL;  in k210_pinconf_set_param()
531 			return -EINVAL;  in k210_pinconf_set_param()
558 		val = readl(&pdata->fpioa->pins[pin]);  in k210_pinconf_set_param()
588 		return -EINVAL;  in k210_pinconf_set_param()
591 	writel(val, &pdata->fpioa->pins[pin]);  in k210_pinconf_set_param()
603 		return -EINVAL;  in k210_pinconf_set()
621 	seq_printf(s, "%#x", readl(&pdata->fpioa->pins[pin]));  in k210_pinconf_dbg_show()
635 		return -EINVAL;  in k210_pinconf_group_set()
641 			return -EINVAL;  in k210_pinconf_group_set()
644 		bit = BIT(selector - K210_NPINS);  in k210_pinconf_group_set()
645 		regmap_update_bits(pdata->sysctl_map,  in k210_pinconf_group_set()
646 				   pdata->power_offset,  in k210_pinconf_group_set()
664 	ret = regmap_read(pdata->sysctl_map, pdata->power_offset, &val);  in k210_pinconf_group_dbg_show()
666 		dev_err(pdata->dev, "Failed to read power reg\n");  in k210_pinconf_group_dbg_show()
671 		   val & BIT(selector - K210_NPINS) ? "1.8" : "3.3");  in k210_pinconf_group_dbg_show()
711 		return -EINVAL;  in k210_pinmux_set_mux()
757 	seq_printf(s, "%s", dev_name(pctldev->dev));  in k210_pinctrl_pin_dbg_show()
789 		dev_err(pctldev->dev, "%pOF: could not parse node property\n",  in k210_pinctrl_dt_subnode_to_map()
806 			ret = -EINVAL;  in k210_pinctrl_dt_subnode_to_map()
813 		dev_dbg(pctldev->dev, "Pinmux %s: pin %u func %s\n",  in k210_pinctrl_dt_subnode_to_map()
814 			np->name, pin, func_name);  in k210_pinctrl_dt_subnode_to_map()
820 			dev_err(pctldev->dev, "%pOF add mux map failed %d\n",  in k210_pinctrl_dt_subnode_to_map()
831 				dev_err(pctldev->dev,  in k210_pinctrl_dt_subnode_to_map()
890 	.name = "k210-pinctrl",
902 	struct k210_fpioa __iomem *fpioa = pdata->fpioa;  in k210_fpioa_init_ties()
906 	dev_dbg(pdata->dev, "Init pin ties\n");  in k210_fpioa_init_ties()
909 	for (i = 0; i < ARRAY_SIZE(fpioa->tie_en); i++) {  in k210_fpioa_init_ties()
914 				dev_dbg(pdata->dev,  in k210_fpioa_init_ties()
923 		writel(val, &fpioa->tie_val[i]);  in k210_fpioa_init_ties()
924 		writel(val, &fpioa->tie_en[i]);  in k210_fpioa_init_ties()
930 	struct device *dev = &pdev->dev;  in k210_fpioa_probe()
931 	struct device_node *np = dev->of_node;  in k210_fpioa_probe()
935 	dev_info(dev, "K210 FPIOA pin controller\n");  in k210_fpioa_probe()
939 		return -ENOMEM;  in k210_fpioa_probe()
941 	pdata->dev = dev;  in k210_fpioa_probe()
944 	pdata->fpioa = devm_platform_ioremap_resource(pdev, 0);  in k210_fpioa_probe()
945 	if (IS_ERR(pdata->fpioa))  in k210_fpioa_probe()
946 		return PTR_ERR(pdata->fpioa);  in k210_fpioa_probe()
948 	pdata->clk = devm_clk_get(dev, "ref");  in k210_fpioa_probe()
949 	if (IS_ERR(pdata->clk))  in k210_fpioa_probe()
950 		return PTR_ERR(pdata->clk);  in k210_fpioa_probe()
952 	ret = clk_prepare_enable(pdata->clk);  in k210_fpioa_probe()
956 	pdata->pclk = devm_clk_get_optional(dev, "pclk");  in k210_fpioa_probe()
957 	if (!IS_ERR(pdata->pclk)) {  in k210_fpioa_probe()
958 		ret = clk_prepare_enable(pdata->pclk);  in k210_fpioa_probe()
963 	pdata->sysctl_map =  in k210_fpioa_probe()
965 						"canaan,k210-sysctl-power",  in k210_fpioa_probe()
966 						1, &pdata->power_offset);  in k210_fpioa_probe()
967 	if (IS_ERR(pdata->sysctl_map)) {  in k210_fpioa_probe()
968 		ret = PTR_ERR(pdata->sysctl_map);  in k210_fpioa_probe()
974 	pdata->pctl = pinctrl_register(&k210_pinctrl_desc, dev, (void *)pdata);  in k210_fpioa_probe()
975 	if (IS_ERR(pdata->pctl)) {  in k210_fpioa_probe()
976 		ret = PTR_ERR(pdata->pctl);  in k210_fpioa_probe()
983 	clk_disable_unprepare(pdata->pclk);  in k210_fpioa_probe()
985 	clk_disable_unprepare(pdata->clk);  in k210_fpioa_probe()
991 	{ .compatible = "canaan,k210-fpioa" },
998 		.name		= "k210-fpioa",