143 static void intel_lpss_cache_ltr(struct intel_lpss *lpss)  in intel_lpss_cache_ltr()  argument
145 	lpss->active_ltr = readl(lpss->priv + LPSS_PRIV_ACTIVELTR);  in intel_lpss_cache_ltr()
146 	lpss->idle_ltr = readl(lpss->priv + LPSS_PRIV_IDLELTR);  in intel_lpss_cache_ltr()
149 static int intel_lpss_debugfs_add(struct intel_lpss *lpss)  in intel_lpss_debugfs_add()  argument
153 	dir = debugfs_create_dir(dev_name(lpss->dev), intel_lpss_debugfs);  in intel_lpss_debugfs_add()
158 	intel_lpss_cache_ltr(lpss);  in intel_lpss_debugfs_add()
160 	debugfs_create_x32("capabilities", S_IRUGO, dir, &lpss->caps);  in intel_lpss_debugfs_add()
161 	debugfs_create_x32("active_ltr", S_IRUGO, dir, &lpss->active_ltr);  in intel_lpss_debugfs_add()
162 	debugfs_create_x32("idle_ltr", S_IRUGO, dir, &lpss->idle_ltr);  in intel_lpss_debugfs_add()
164 	lpss->debugfs = dir;  in intel_lpss_debugfs_add()
168 static void intel_lpss_debugfs_remove(struct intel_lpss *lpss)  in intel_lpss_debugfs_remove()  argument
170 	debugfs_remove_recursive(lpss->debugfs);  in intel_lpss_debugfs_remove()
175 	struct intel_lpss *lpss = dev_get_drvdata(dev);  in intel_lpss_ltr_set()  local
183 	ltr = readl(lpss->priv + LPSS_PRIV_ACTIVELTR);  in intel_lpss_ltr_set()
198 	if (ltr == lpss->active_ltr)  in intel_lpss_ltr_set()
201 	writel(ltr, lpss->priv + LPSS_PRIV_ACTIVELTR);  in intel_lpss_ltr_set()
202 	writel(ltr, lpss->priv + LPSS_PRIV_IDLELTR);  in intel_lpss_ltr_set()
205 	intel_lpss_cache_ltr(lpss);  in intel_lpss_ltr_set()
208 static void intel_lpss_ltr_expose(struct intel_lpss *lpss)  in intel_lpss_ltr_expose()  argument
210 	lpss->dev->power.set_latency_tolerance = intel_lpss_ltr_set;  in intel_lpss_ltr_expose()
211 	dev_pm_qos_expose_latency_tolerance(lpss->dev);  in intel_lpss_ltr_expose()
214 static void intel_lpss_ltr_hide(struct intel_lpss *lpss)  in intel_lpss_ltr_hide()  argument
216 	dev_pm_qos_hide_latency_tolerance(lpss->dev);  in intel_lpss_ltr_hide()
217 	lpss->dev->power.set_latency_tolerance = NULL;  in intel_lpss_ltr_hide()
220 static int intel_lpss_assign_devs(struct intel_lpss *lpss)  in intel_lpss_assign_devs()  argument
224 	type = lpss->caps & LPSS_PRIV_CAPS_TYPE_MASK;  in intel_lpss_assign_devs()
229 		lpss->cell = &intel_lpss_i2c_cell;  in intel_lpss_assign_devs()
232 		lpss->cell = &intel_lpss_uart_cell;  in intel_lpss_assign_devs()
235 		lpss->cell = &intel_lpss_spi_cell;  in intel_lpss_assign_devs()
241 	lpss->type = type;  in intel_lpss_assign_devs()
246 static bool intel_lpss_has_idma(const struct intel_lpss *lpss)  in intel_lpss_has_idma()  argument
248 	return (lpss->caps & LPSS_PRIV_CAPS_NO_IDMA) == 0;  in intel_lpss_has_idma()
251 static void intel_lpss_set_remap_addr(const struct intel_lpss *lpss)  in intel_lpss_set_remap_addr()  argument
253 	resource_size_t addr = lpss->info->mem->start;  in intel_lpss_set_remap_addr()
255 	lo_hi_writeq(addr, lpss->priv + LPSS_PRIV_REMAP_ADDR);  in intel_lpss_set_remap_addr()
258 static void intel_lpss_deassert_reset(const struct intel_lpss *lpss)  in intel_lpss_deassert_reset()  argument
263 	writel(value, lpss->priv + LPSS_PRIV_RESETS);  in intel_lpss_deassert_reset()
266 static void intel_lpss_init_dev(const struct intel_lpss *lpss)  in intel_lpss_init_dev()  argument
270 	intel_lpss_deassert_reset(lpss);  in intel_lpss_init_dev()
272 	if (!intel_lpss_has_idma(lpss))  in intel_lpss_init_dev()
275 	intel_lpss_set_remap_addr(lpss);  in intel_lpss_init_dev()
278 	if (lpss->type == LPSS_DEV_SPI)  in intel_lpss_init_dev()
279 		writel(value, lpss->priv + LPSS_PRIV_SSP_REG);  in intel_lpss_init_dev()
293 static int intel_lpss_register_clock_divider(struct intel_lpss *lpss,  in intel_lpss_register_clock_divider()  argument
302 				lpss->priv, 0, 0, NULL);  in intel_lpss_register_clock_divider()
308 					      0, lpss->priv, 1, 15, 16, 15, 0,  in intel_lpss_register_clock_divider()
316 				CLK_SET_RATE_PARENT, lpss->priv, 31, 0, NULL);  in intel_lpss_register_clock_divider()
324 static int intel_lpss_register_clock(struct intel_lpss *lpss)  in intel_lpss_register_clock()  argument
326 	const struct mfd_cell *cell = lpss->cell;  in intel_lpss_register_clock()
331 	if (!lpss->info->clk_rate)  in intel_lpss_register_clock()
335 	clk = clk_register_fixed_rate(NULL, dev_name(lpss->dev), NULL,  in intel_lpss_register_clock()
336 				      CLK_IS_ROOT, lpss->info->clk_rate);  in intel_lpss_register_clock()
340 	snprintf(devname, sizeof(devname), "%s.%d", cell->name, lpss->devid);  in intel_lpss_register_clock()
346 	if (lpss->type != LPSS_DEV_I2C) {  in intel_lpss_register_clock()
347 		ret = intel_lpss_register_clock_divider(lpss, devname, &clk);  in intel_lpss_register_clock()
355 	lpss->clock = clkdev_create(clk, lpss->info->clk_con_id, "%s", devname);  in intel_lpss_register_clock()
356 	if (!lpss->clock)  in intel_lpss_register_clock()
359 	lpss->clk = clk;  in intel_lpss_register_clock()
369 static void intel_lpss_unregister_clock(struct intel_lpss *lpss)  in intel_lpss_unregister_clock()  argument
371 	if (IS_ERR_OR_NULL(lpss->clk))  in intel_lpss_unregister_clock()
374 	clkdev_drop(lpss->clock);  in intel_lpss_unregister_clock()
375 	intel_lpss_unregister_clock_tree(lpss->clk);  in intel_lpss_unregister_clock()
381 	struct intel_lpss *lpss;  in intel_lpss_probe()  local
387 	lpss = devm_kzalloc(dev, sizeof(*lpss), GFP_KERNEL);  in intel_lpss_probe()
388 	if (!lpss)  in intel_lpss_probe()
391 	lpss->priv = devm_ioremap(dev, info->mem->start + LPSS_PRIV_OFFSET,  in intel_lpss_probe()
393 	if (!lpss->priv)  in intel_lpss_probe()
396 	lpss->info = info;  in intel_lpss_probe()
397 	lpss->dev = dev;  in intel_lpss_probe()
398 	lpss->caps = readl(lpss->priv + LPSS_PRIV_CAPS);  in intel_lpss_probe()
400 	dev_set_drvdata(dev, lpss);  in intel_lpss_probe()
402 	ret = intel_lpss_assign_devs(lpss);  in intel_lpss_probe()
406 	intel_lpss_init_dev(lpss);  in intel_lpss_probe()
408 	lpss->devid = ida_simple_get(&intel_lpss_devid_ida, 0, 0, GFP_KERNEL);  in intel_lpss_probe()
409 	if (lpss->devid < 0)  in intel_lpss_probe()
410 		return lpss->devid;  in intel_lpss_probe()
412 	ret = intel_lpss_register_clock(lpss);  in intel_lpss_probe()
416 	intel_lpss_ltr_expose(lpss);  in intel_lpss_probe()
418 	ret = intel_lpss_debugfs_add(lpss);  in intel_lpss_probe()
422 	if (intel_lpss_has_idma(lpss)) {  in intel_lpss_probe()
433 		ret = mfd_add_devices(dev, lpss->devid, &intel_lpss_idma64_cell,  in intel_lpss_probe()
440 	ret = mfd_add_devices(dev, lpss->devid, lpss->cell,  in intel_lpss_probe()
448 	intel_lpss_debugfs_remove(lpss);  in intel_lpss_probe()
449 	intel_lpss_ltr_hide(lpss);  in intel_lpss_probe()
450 	intel_lpss_unregister_clock(lpss);  in intel_lpss_probe()
453 	ida_simple_remove(&intel_lpss_devid_ida, lpss->devid);  in intel_lpss_probe()
461 	struct intel_lpss *lpss = dev_get_drvdata(dev);  in intel_lpss_remove()  local
464 	intel_lpss_debugfs_remove(lpss);  in intel_lpss_remove()
465 	intel_lpss_ltr_hide(lpss);  in intel_lpss_remove()
466 	intel_lpss_unregister_clock(lpss);  in intel_lpss_remove()
467 	ida_simple_remove(&intel_lpss_devid_ida, lpss->devid);  in intel_lpss_remove()
490 	struct intel_lpss *lpss = dev_get_drvdata(dev);  in intel_lpss_suspend()  local
495 		lpss->priv_ctx[i] = readl(lpss->priv + i * 4);  in intel_lpss_suspend()
498 	writel(0, lpss->priv + LPSS_PRIV_RESETS);  in intel_lpss_suspend()
506 	struct intel_lpss *lpss = dev_get_drvdata(dev);  in intel_lpss_resume()  local
509 	intel_lpss_deassert_reset(lpss);  in intel_lpss_resume()
513 		writel(lpss->priv_ctx[i], lpss->priv + i * 4);  in intel_lpss_resume()