1 // SPDX-License-Identifier: GPL-2.0
6  * Copyright (c) 2013-2014 Texas Instruments, Inc.
12 #include <linux/clk.h>
13 #include <linux/clk-provider.h>
58 	ret = palmas_update_bits(cinfo->palmas, PALMAS_RESOURCE_BASE,  in palmas_clks_prepare()
59 				 cinfo->clk_desc->control_reg,  in palmas_clks_prepare()
60 				 cinfo->clk_desc->enable_mask,  in palmas_clks_prepare()
61 				 cinfo->clk_desc->enable_mask);  in palmas_clks_prepare()
63 		dev_err(cinfo->dev, "Reg 0x%02x update failed, %d\n",  in palmas_clks_prepare()
64 			cinfo->clk_desc->control_reg, ret);  in palmas_clks_prepare()
65 	else if (cinfo->clk_desc->delay)  in palmas_clks_prepare()
66 		udelay(cinfo->clk_desc->delay);  in palmas_clks_prepare()
77 	 * Clock can be disabled through external pin if it is externally  in palmas_clks_unprepare()
80 	if (cinfo->ext_control_pin)  in palmas_clks_unprepare()
83 	ret = palmas_update_bits(cinfo->palmas, PALMAS_RESOURCE_BASE,  in palmas_clks_unprepare()
84 				 cinfo->clk_desc->control_reg,  in palmas_clks_unprepare()
85 				 cinfo->clk_desc->enable_mask, 0);  in palmas_clks_unprepare()
87 		dev_err(cinfo->dev, "Reg 0x%02x update failed, %d\n",  in palmas_clks_unprepare()
88 			cinfo->clk_desc->control_reg, ret);  in palmas_clks_unprepare()
97 	if (cinfo->ext_control_pin)  in palmas_clks_is_prepared()
100 	ret = palmas_read(cinfo->palmas, PALMAS_RESOURCE_BASE,  in palmas_clks_is_prepared()
101 			  cinfo->clk_desc->control_reg, &val);  in palmas_clks_is_prepared()
103 		dev_err(cinfo->dev, "Reg 0x%02x read failed, %d\n",  in palmas_clks_is_prepared()
104 			cinfo->clk_desc->control_reg, ret);  in palmas_clks_is_prepared()
107 	return !!(val & cinfo->clk_desc->enable_mask);  in palmas_clks_is_prepared()
156 		.compatible = "ti,palmas-clk32kg",
160 		.compatible = "ti,palmas-clk32kgaudio",
170 	struct device_node *node = pdev->dev.of_node;  in palmas_clks_get_clk_data()
174 	ret = of_property_read_u32(node, "ti,external-sleep-control",  in palmas_clks_get_clk_data()
190 		dev_warn(&pdev->dev, "%pOFn: Invalid ext control option: %u\n",  in palmas_clks_get_clk_data()
195 	cinfo->ext_control_pin = prop;  in palmas_clks_get_clk_data()
202 	ret = palmas_update_bits(cinfo->palmas, PALMAS_RESOURCE_BASE,  in palmas_clks_init_configure()
203 				 cinfo->clk_desc->control_reg,  in palmas_clks_init_configure()
204 				 cinfo->clk_desc->sleep_mask, 0);  in palmas_clks_init_configure()
206 		dev_err(cinfo->dev, "Reg 0x%02x update failed, %d\n",  in palmas_clks_init_configure()
207 			cinfo->clk_desc->control_reg, ret);  in palmas_clks_init_configure()
211 	if (cinfo->ext_control_pin) {  in palmas_clks_init_configure()
212 		ret = clk_prepare(cinfo->hw.clk);  in palmas_clks_init_configure()
214 			dev_err(cinfo->dev, "Clock prep failed, %d\n", ret);  in palmas_clks_init_configure()
218 		ret = palmas_ext_control_req_config(cinfo->palmas,  in palmas_clks_init_configure()
219 					cinfo->clk_desc->sleep_reqstr_id,  in palmas_clks_init_configure()
220 					cinfo->ext_control_pin, true);  in palmas_clks_init_configure()
222 			dev_err(cinfo->dev, "Ext config for %s failed, %d\n",  in palmas_clks_init_configure()
223 				cinfo->clk_desc->clk_name, ret);  in palmas_clks_init_configure()
224 			clk_unprepare(cinfo->hw.clk);  in palmas_clks_init_configure()
233 	struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);  in palmas_clks_probe()
234 	struct device_node *node = pdev->dev.of_node;  in palmas_clks_probe()
239 	match_data = of_device_get_match_data(&pdev->dev);  in palmas_clks_probe()
243 	cinfo = devm_kzalloc(&pdev->dev, sizeof(*cinfo), GFP_KERNEL);  in palmas_clks_probe()
245 		return -ENOMEM;  in palmas_clks_probe()
250 	cinfo->dev = &pdev->dev;  in palmas_clks_probe()
251 	cinfo->palmas = palmas;  in palmas_clks_probe()
253 	cinfo->clk_desc = &match_data->desc;  in palmas_clks_probe()
254 	cinfo->hw.init = &match_data->init;  in palmas_clks_probe()
255 	ret = devm_clk_hw_register(&pdev->dev, &cinfo->hw);  in palmas_clks_probe()
257 		dev_err(&pdev->dev, "Fail to register clock %s, %d\n",  in palmas_clks_probe()
258 			match_data->desc.clk_name, ret);  in palmas_clks_probe()
264 		dev_err(&pdev->dev, "Clock config failed, %d\n", ret);  in palmas_clks_probe()
268 	ret = of_clk_add_hw_provider(node, of_clk_hw_simple_get, &cinfo->hw);  in palmas_clks_probe()
270 		dev_err(&pdev->dev, "Fail to add clock driver, %d\n", ret);  in palmas_clks_probe()
276 	of_clk_del_provider(pdev->dev.of_node);  in palmas_clks_remove()
282 		.name = "palmas-clk",
292 MODULE_ALIAS("platform:palmas-clk");