53 	spinlock_t lock; /* protect access to IPCC registers */
84 	struct stm32_ipcc *ipcc = data;  in stm32_ipcc_rx_irq()  local
85 	struct device *dev = ipcc->controller.dev;  in stm32_ipcc_rx_irq()
91 	proc_offset = ipcc->proc_id ? -IPCC_PROC_OFFST : IPCC_PROC_OFFST;  in stm32_ipcc_rx_irq()
92 	tosr = readl_relaxed(ipcc->reg_proc + proc_offset + IPCC_XTOYSR);  in stm32_ipcc_rx_irq()
93 	mr = readl_relaxed(ipcc->reg_proc + IPCC_XMR);  in stm32_ipcc_rx_irq()
98 	for (chan = 0; chan < ipcc->n_chans; chan++) {  in stm32_ipcc_rx_irq()
104 		mbox_chan_received_data(&ipcc->controller.chans[chan], NULL);  in stm32_ipcc_rx_irq()
106 		stm32_ipcc_set_bits(&ipcc->lock, ipcc->reg_proc + IPCC_XSCR,  in stm32_ipcc_rx_irq()
117 	struct stm32_ipcc *ipcc = data;  in stm32_ipcc_tx_irq()  local
118 	struct device *dev = ipcc->controller.dev;  in stm32_ipcc_tx_irq()
122 	tosr = readl_relaxed(ipcc->reg_proc + IPCC_XTOYSR);  in stm32_ipcc_tx_irq()
123 	mr = readl_relaxed(ipcc->reg_proc + IPCC_XMR);  in stm32_ipcc_tx_irq()
128 	for (chan = 0; chan < ipcc->n_chans ; chan++) {  in stm32_ipcc_tx_irq()
135 		stm32_ipcc_set_bits(&ipcc->lock, ipcc->reg_proc + IPCC_XMR,  in stm32_ipcc_tx_irq()
138 		mbox_chan_txdone(&ipcc->controller.chans[chan], 0);  in stm32_ipcc_tx_irq()
149 	struct stm32_ipcc *ipcc = container_of(link->mbox, struct stm32_ipcc,  in stm32_ipcc_send_data()  local
152 	dev_dbg(ipcc->controller.dev, "%s: chan:%d\n", __func__, chan);  in stm32_ipcc_send_data()
155 	stm32_ipcc_set_bits(&ipcc->lock, ipcc->reg_proc + IPCC_XSCR,  in stm32_ipcc_send_data()
159 	stm32_ipcc_clr_bits(&ipcc->lock, ipcc->reg_proc + IPCC_XMR,  in stm32_ipcc_send_data()
168 	struct stm32_ipcc *ipcc = container_of(link->mbox, struct stm32_ipcc,  in stm32_ipcc_startup()  local
172 	ret = clk_prepare_enable(ipcc->clk);  in stm32_ipcc_startup()
174 		dev_err(ipcc->controller.dev, "can not enable the clock\n");  in stm32_ipcc_startup()
179 	stm32_ipcc_clr_bits(&ipcc->lock, ipcc->reg_proc + IPCC_XMR,  in stm32_ipcc_startup()
188 	struct stm32_ipcc *ipcc = container_of(link->mbox, struct stm32_ipcc,  in stm32_ipcc_shutdown()  local
192 	stm32_ipcc_set_bits(&ipcc->lock, ipcc->reg_proc + IPCC_XMR,  in stm32_ipcc_shutdown()
195 	clk_disable_unprepare(ipcc->clk);  in stm32_ipcc_shutdown()
208 	struct stm32_ipcc *ipcc;  in stm32_ipcc_probe()  local
221 	ipcc = devm_kzalloc(dev, sizeof(*ipcc), GFP_KERNEL);  in stm32_ipcc_probe()
222 	if (!ipcc)  in stm32_ipcc_probe()
225 	spin_lock_init(&ipcc->lock);  in stm32_ipcc_probe()
228 	if (of_property_read_u32(np, "st,proc-id", &ipcc->proc_id)) {  in stm32_ipcc_probe()
233 	if (ipcc->proc_id >= STM32_MAX_PROCS) {  in stm32_ipcc_probe()
234 		dev_err(dev, "Invalid proc_id (%d)\n", ipcc->proc_id);  in stm32_ipcc_probe()
240 	ipcc->reg_base = devm_ioremap_resource(dev, res);  in stm32_ipcc_probe()
241 	if (IS_ERR(ipcc->reg_base))  in stm32_ipcc_probe()
242 		return PTR_ERR(ipcc->reg_base);  in stm32_ipcc_probe()
244 	ipcc->reg_proc = ipcc->reg_base + ipcc->proc_id * IPCC_PROC_OFFST;  in stm32_ipcc_probe()
247 	ipcc->clk = devm_clk_get(dev, NULL);  in stm32_ipcc_probe()
248 	if (IS_ERR(ipcc->clk))  in stm32_ipcc_probe()
249 		return PTR_ERR(ipcc->clk);  in stm32_ipcc_probe()
251 	ret = clk_prepare_enable(ipcc->clk);  in stm32_ipcc_probe()
259 		ipcc->irqs[i] = platform_get_irq_byname(pdev, irq_name[i]);  in stm32_ipcc_probe()
260 		if (ipcc->irqs[i] < 0) {  in stm32_ipcc_probe()
261 			if (ipcc->irqs[i] != -EPROBE_DEFER)  in stm32_ipcc_probe()
264 			ret = ipcc->irqs[i];  in stm32_ipcc_probe()
268 		ret = devm_request_threaded_irq(dev, ipcc->irqs[i], NULL,  in stm32_ipcc_probe()
270 						dev_name(dev), ipcc);  in stm32_ipcc_probe()
278 	stm32_ipcc_set_bits(&ipcc->lock, ipcc->reg_proc + IPCC_XMR,  in stm32_ipcc_probe()
280 	stm32_ipcc_set_bits(&ipcc->lock, ipcc->reg_proc + IPCC_XCR,  in stm32_ipcc_probe()
285 		ipcc->wkp = platform_get_irq_byname(pdev, "wakeup");  in stm32_ipcc_probe()
286 		if (ipcc->wkp < 0) {  in stm32_ipcc_probe()
287 			if (ipcc->wkp != -EPROBE_DEFER)  in stm32_ipcc_probe()
289 			ret = ipcc->wkp;  in stm32_ipcc_probe()
294 		ret = dev_pm_set_dedicated_wake_irq(dev, ipcc->wkp);  in stm32_ipcc_probe()
304 	ipcc->n_chans = readl_relaxed(ipcc->reg_base + IPCC_HWCFGR);  in stm32_ipcc_probe()
305 	ipcc->n_chans &= IPCFGR_CHAN_MASK;  in stm32_ipcc_probe()
307 	ipcc->controller.dev = dev;  in stm32_ipcc_probe()
308 	ipcc->controller.txdone_irq = true;  in stm32_ipcc_probe()
309 	ipcc->controller.ops = &stm32_ipcc_ops;  in stm32_ipcc_probe()
310 	ipcc->controller.num_chans = ipcc->n_chans;  in stm32_ipcc_probe()
311 	ipcc->controller.chans = devm_kcalloc(dev, ipcc->controller.num_chans,  in stm32_ipcc_probe()
312 					      sizeof(*ipcc->controller.chans),  in stm32_ipcc_probe()
314 	if (!ipcc->controller.chans) {  in stm32_ipcc_probe()
319 	for (i = 0; i < ipcc->controller.num_chans; i++)  in stm32_ipcc_probe()
320 		ipcc->controller.chans[i].con_priv = (void *)i;  in stm32_ipcc_probe()
322 	ret = mbox_controller_register(&ipcc->controller);  in stm32_ipcc_probe()
326 	platform_set_drvdata(pdev, ipcc);  in stm32_ipcc_probe()
328 	ip_ver = readl_relaxed(ipcc->reg_base + IPCC_VER);  in stm32_ipcc_probe()
330 	dev_info(dev, "ipcc rev:%ld.%ld enabled, %d chans, proc %d\n",  in stm32_ipcc_probe()
333 		 ipcc->controller.num_chans, ipcc->proc_id);  in stm32_ipcc_probe()
335 	clk_disable_unprepare(ipcc->clk);  in stm32_ipcc_probe()
339 	if (ipcc->wkp)  in stm32_ipcc_probe()
344 	clk_disable_unprepare(ipcc->clk);  in stm32_ipcc_probe()
350 	struct stm32_ipcc *ipcc = platform_get_drvdata(pdev);  in stm32_ipcc_remove()  local
352 	mbox_controller_unregister(&ipcc->controller);  in stm32_ipcc_remove()
354 	if (ipcc->wkp)  in stm32_ipcc_remove()
365 	struct stm32_ipcc *ipcc = dev_get_drvdata(dev);  in stm32_ipcc_set_irq_wake()  local
370 			irq_set_irq_wake(ipcc->irqs[i], enable);  in stm32_ipcc_set_irq_wake()
375 	struct stm32_ipcc *ipcc = dev_get_drvdata(dev);  in stm32_ipcc_suspend()  local
377 	ipcc->xmr = readl_relaxed(ipcc->reg_proc + IPCC_XMR);  in stm32_ipcc_suspend()
378 	ipcc->xcr = readl_relaxed(ipcc->reg_proc + IPCC_XCR);  in stm32_ipcc_suspend()
387 	struct stm32_ipcc *ipcc = dev_get_drvdata(dev);  in stm32_ipcc_resume()  local
391 	writel_relaxed(ipcc->xmr, ipcc->reg_proc + IPCC_XMR);  in stm32_ipcc_resume()
392 	writel_relaxed(ipcc->xcr, ipcc->reg_proc + IPCC_XCR);  in stm32_ipcc_resume()
402 	{ .compatible = "st,stm32mp1-ipcc" },
409 		.name = "stm32-ipcc",
421 MODULE_DESCRIPTION("STM32 IPCC driver");