1 // SPDX-License-Identifier: GPL-2.0+
4  * Copyright 2017-2018 NXP
7  * Implementation of the SCU based Power Domains
10  * single global power domain and implement the ->attach|detach_dev()
12  * From within the ->attach_dev(), we could get the OF node for
13  * the device that is being attached and then parse the power-domain
18  * Additionally, we need to implement the ->stop() and ->start()
20  * rather than using the above ->power_on|off() callbacks.
23  * 1. The ->attach_dev() of power domain infrastructure still does
32  *    Update: Genpd assigns the ->of_node for the virtual device before it
33  *    invokes ->attach_dev() callback, hence parsing for device resources via
37  *    behavior changed if removing ->power_on|off() callback and use
38  *    ->start() and ->stop() instead. genpd_dev_pm_attach will only power
41  *    not up before running driver probe function. For SCU enabled
54 #include <dt-bindings/firmware/imx/rsrc.h>
67 /* SCU Power Mode Protocol definition */
86 	/* add domain index */
119 	{ "audio-pll0", IMX_SC_R_AUDIO_PLL_0, 1, false, 0 },
120 	{ "audio-pll1", IMX_SC_R_AUDIO_PLL_1, 1, false, 0 },
121 	{ "audio-clk-0", IMX_SC_R_AUDIO_CLK_0, 1, false, 0 },
122 	{ "audio-clk-1", IMX_SC_R_AUDIO_CLK_1, 1, false, 0 },
123 	{ "dma0-ch", IMX_SC_R_DMA_0_CH0, 16, true, 0 },
124 	{ "dma1-ch", IMX_SC_R_DMA_1_CH0, 16, true, 0 },
125 	{ "dma2-ch", IMX_SC_R_DMA_2_CH0, 5, true, 0 },
140 	{ "dsp-ram", IMX_SC_R_DSP_RAM, 1, false, 0 },
148 	{ "lcd0-pwm", IMX_SC_R_LCD_0_PWM_0, 1, true, 0 },
155 	{ "vpu-pid", IMX_SC_R_VPU_PID0, 8, true, 0 },
156 	{ "vpu-dec0", IMX_SC_R_VPU_DEC_0, 1, false, 0 },
157 	{ "vpu-enc0", IMX_SC_R_VPU_ENC_0, 1, false, 0 },
160 	{ "gpu0-pid", IMX_SC_R_GPU_0_PID0, 4, true, 0 },
163 	{ "pcie-b", IMX_SC_R_PCIE_B, 1, false, 0 },
164 	{ "serdes-1", IMX_SC_R_SERDES_1, 1, false, 0 },
165 	{ "hsio-gpio", IMX_SC_R_HSIO_GPIO, 1, false, 0 },
169 	{ "mipi0-pwm0", IMX_SC_R_MIPI_0_PWM_0, 1, false, 0 },
170 	{ "mipi0-i2c", IMX_SC_R_MIPI_0_I2C_0, 2, true, 0 },
173 	{ "mipi1-pwm0", IMX_SC_R_MIPI_1_PWM_0, 1, false, 0 },
174 	{ "mipi1-i2c", IMX_SC_R_MIPI_1_I2C_0, 2, true, 0 },
182 	{ "dc0-pll", IMX_SC_R_DC_0_PLL_0, 2, true, 0 },
183 	{ "dc0-video", IMX_SC_R_DC_0_VIDEO0, 2, true, 0 },
186 	{ "cm40-i2c", IMX_SC_R_M4_0_I2C, 1, false, 0 },
187 	{ "cm40-intmux", IMX_SC_R_M4_0_INTMUX, 1, false, 0 },
188 	{ "cm40-pid", IMX_SC_R_M4_0_PID0, 5, true, 0},
189 	{ "cm40-mu-a1", IMX_SC_R_M4_0_MU_1A, 1, false, 0},
190 	{ "cm40-lpuart", IMX_SC_R_M4_0_UART, 1, false, 0},
193 	{ "cm41-i2c", IMX_SC_R_M4_1_I2C, 1, false, 0 },
194 	{ "cm41-intmux", IMX_SC_R_M4_1_INTMUX, 1, false, 0 },
195 	{ "cm41-pid", IMX_SC_R_M4_1_PID0, 5, true, 0},
196 	{ "cm41-mu-a1", IMX_SC_R_M4_1_MU_1A, 1, false, 0},
197 	{ "cm41-lpuart", IMX_SC_R_M4_1_UART, 1, false, 0},
200 	{ "img-jpegdec-mp", IMX_SC_R_MJPEG_DEC_MP, 1, false, 0 },
201 	{ "img-jpegdec-s0", IMX_SC_R_MJPEG_DEC_S0, 4, true, 0 },
202 	{ "img-jpegenc-mp", IMX_SC_R_MJPEG_ENC_MP, 1, false, 0 },
203 	{ "img-jpegenc-s0", IMX_SC_R_MJPEG_ENC_S0, 4, true, 0 },
227 	ret = of_parse_phandle_with_args(of_stdout, "power-domains",  in imx_sc_pd_get_console_rsrc()
228 					 "#power-domain-cells",  in imx_sc_pd_get_console_rsrc()
245 	hdr->ver = IMX_SC_RPC_VERSION;  in imx_sc_pd_power()
246 	hdr->svc = IMX_SC_RPC_SVC_PM;  in imx_sc_pd_power()
247 	hdr->func = IMX_SC_PM_FUNC_SET_RESOURCE_POWER_MODE;  in imx_sc_pd_power()
248 	hdr->size = 2;  in imx_sc_pd_power()
250 	msg.resource = pd->rsrc;  in imx_sc_pd_power()
255 		dev_err(&domain->dev, "failed to power %s resource %d ret %d\n",  in imx_sc_pd_power()
256 			power_on ? "up" : "off", pd->rsrc, ret);  in imx_sc_pd_power()
274 	struct generic_pm_domain *domain = ERR_PTR(-ENOENT);  in imx_scu_pd_xlate()
278 	for (i = 0; i < pd_data->num_domains; i++) {  in imx_scu_pd_xlate()
281 		sc_pd = to_imx_sc_pd(pd_data->domains[i]);  in imx_scu_pd_xlate()
282 		if (sc_pd->rsrc == spec->args[0]) {  in imx_scu_pd_xlate()
283 			domain = &sc_pd->pd;  in imx_scu_pd_xlate()
299 	if (!imx_sc_rm_is_resource_owned(pm_ipc_handle, pd_ranges->rsrc + idx))  in imx_scu_add_pm_domain()
304 		return ERR_PTR(-ENOMEM);  in imx_scu_add_pm_domain()
306 	sc_pd->rsrc = pd_ranges->rsrc + idx;  in imx_scu_add_pm_domain()
307 	sc_pd->pd.power_off = imx_sc_pd_power_off;  in imx_scu_add_pm_domain()
308 	sc_pd->pd.power_on = imx_sc_pd_power_on;  in imx_scu_add_pm_domain()
310 	if (pd_ranges->postfix)  in imx_scu_add_pm_domain()
311 		snprintf(sc_pd->name, sizeof(sc_pd->name),  in imx_scu_add_pm_domain()
312 			 "%s%i", pd_ranges->name, pd_ranges->start_from + idx);  in imx_scu_add_pm_domain()
314 		snprintf(sc_pd->name, sizeof(sc_pd->name),  in imx_scu_add_pm_domain()
315 			 "%s", pd_ranges->name);  in imx_scu_add_pm_domain()
317 	sc_pd->pd.name = sc_pd->name;  in imx_scu_add_pm_domain()
318 	if (imx_con_rsrc == sc_pd->rsrc) {  in imx_scu_add_pm_domain()
319 		sc_pd->pd.flags = GENPD_FLAG_RPM_ALWAYS_ON;  in imx_scu_add_pm_domain()
323 	if (sc_pd->rsrc >= IMX_SC_R_LAST) {  in imx_scu_add_pm_domain()
325 			 sc_pd->name, sc_pd->rsrc);  in imx_scu_add_pm_domain()
331 	ret = pm_genpd_init(&sc_pd->pd, NULL, is_off);  in imx_scu_add_pm_domain()
334 			 sc_pd->name, sc_pd->rsrc);  in imx_scu_add_pm_domain()
345 	const struct imx_sc_pd_range *pd_ranges = pd_soc->pd_ranges;  in imx_scu_init_pm_domains()
352 	for (i = 0; i < pd_soc->num_ranges; i++)  in imx_scu_init_pm_domains()
357 		return -ENOMEM;  in imx_scu_init_pm_domains()
361 		return -ENOMEM;  in imx_scu_init_pm_domains()
364 	for (i = 0; i < pd_soc->num_ranges; i++) {  in imx_scu_init_pm_domains()
370 			domains[count++] = &sc_pd->pd;  in imx_scu_init_pm_domains()
371 			dev_dbg(dev, "added power domain %s\n", sc_pd->pd.name);  in imx_scu_init_pm_domains()
375 	pd_data->domains = domains;  in imx_scu_init_pm_domains()
376 	pd_data->num_domains = count;  in imx_scu_init_pm_domains()
377 	pd_data->xlate = imx_scu_pd_xlate;  in imx_scu_init_pm_domains()
379 	of_genpd_add_provider_onecell(dev->of_node, pd_data);  in imx_scu_init_pm_domains()
393 	pd_soc = of_device_get_match_data(&pdev->dev);  in imx_sc_pd_probe()
395 		return -ENODEV;  in imx_sc_pd_probe()
399 	return imx_scu_init_pm_domains(&pdev->dev, pd_soc);  in imx_sc_pd_probe()
403 	{ .compatible = "fsl,imx8qxp-scu-pd", &imx8qxp_scu_pd},
404 	{ .compatible = "fsl,scu-pd", &imx8qxp_scu_pd},
410 		.name = "imx-scu-pd",
418 MODULE_DESCRIPTION("IMX SCU Power Domain driver");