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320 lines
6.4 KiB
320 lines
6.4 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Actions Semi Owl Smart Power System (SPS) |
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* |
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* Copyright 2012 Actions Semi Inc. |
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* Author: Actions Semi, Inc. |
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* |
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* Copyright (c) 2017 Andreas Färber |
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*/ |
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#include <linux/of_address.h> |
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#include <linux/of_platform.h> |
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#include <linux/pm_domain.h> |
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#include <linux/soc/actions/owl-sps.h> |
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#include <dt-bindings/power/owl-s500-powergate.h> |
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#include <dt-bindings/power/owl-s700-powergate.h> |
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#include <dt-bindings/power/owl-s900-powergate.h> |
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struct owl_sps_domain_info { |
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const char *name; |
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int pwr_bit; |
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int ack_bit; |
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unsigned int genpd_flags; |
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}; |
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struct owl_sps_info { |
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unsigned num_domains; |
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const struct owl_sps_domain_info *domains; |
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}; |
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struct owl_sps { |
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struct device *dev; |
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const struct owl_sps_info *info; |
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void __iomem *base; |
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struct genpd_onecell_data genpd_data; |
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struct generic_pm_domain *domains[]; |
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}; |
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#define to_owl_pd(gpd) container_of(gpd, struct owl_sps_domain, genpd) |
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struct owl_sps_domain { |
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struct generic_pm_domain genpd; |
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const struct owl_sps_domain_info *info; |
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struct owl_sps *sps; |
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}; |
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static int owl_sps_set_power(struct owl_sps_domain *pd, bool enable) |
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{ |
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u32 pwr_mask, ack_mask; |
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ack_mask = BIT(pd->info->ack_bit); |
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pwr_mask = BIT(pd->info->pwr_bit); |
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return owl_sps_set_pg(pd->sps->base, pwr_mask, ack_mask, enable); |
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} |
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static int owl_sps_power_on(struct generic_pm_domain *domain) |
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{ |
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struct owl_sps_domain *pd = to_owl_pd(domain); |
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dev_dbg(pd->sps->dev, "%s power on", pd->info->name); |
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return owl_sps_set_power(pd, true); |
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} |
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static int owl_sps_power_off(struct generic_pm_domain *domain) |
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{ |
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struct owl_sps_domain *pd = to_owl_pd(domain); |
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dev_dbg(pd->sps->dev, "%s power off", pd->info->name); |
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return owl_sps_set_power(pd, false); |
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} |
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static int owl_sps_init_domain(struct owl_sps *sps, int index) |
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{ |
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struct owl_sps_domain *pd; |
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pd = devm_kzalloc(sps->dev, sizeof(*pd), GFP_KERNEL); |
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if (!pd) |
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return -ENOMEM; |
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pd->info = &sps->info->domains[index]; |
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pd->sps = sps; |
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pd->genpd.name = pd->info->name; |
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pd->genpd.power_on = owl_sps_power_on; |
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pd->genpd.power_off = owl_sps_power_off; |
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pd->genpd.flags = pd->info->genpd_flags; |
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pm_genpd_init(&pd->genpd, NULL, false); |
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sps->genpd_data.domains[index] = &pd->genpd; |
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return 0; |
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} |
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static int owl_sps_probe(struct platform_device *pdev) |
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{ |
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const struct of_device_id *match; |
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const struct owl_sps_info *sps_info; |
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struct owl_sps *sps; |
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int i, ret; |
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if (!pdev->dev.of_node) { |
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dev_err(&pdev->dev, "no device node\n"); |
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return -ENODEV; |
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} |
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match = of_match_device(pdev->dev.driver->of_match_table, &pdev->dev); |
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if (!match || !match->data) { |
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dev_err(&pdev->dev, "unknown compatible or missing data\n"); |
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return -EINVAL; |
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} |
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sps_info = match->data; |
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sps = devm_kzalloc(&pdev->dev, |
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struct_size(sps, domains, sps_info->num_domains), |
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GFP_KERNEL); |
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if (!sps) |
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return -ENOMEM; |
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sps->base = of_io_request_and_map(pdev->dev.of_node, 0, "owl-sps"); |
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if (IS_ERR(sps->base)) { |
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dev_err(&pdev->dev, "failed to map sps registers\n"); |
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return PTR_ERR(sps->base); |
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} |
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sps->dev = &pdev->dev; |
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sps->info = sps_info; |
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sps->genpd_data.domains = sps->domains; |
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sps->genpd_data.num_domains = sps_info->num_domains; |
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for (i = 0; i < sps_info->num_domains; i++) { |
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ret = owl_sps_init_domain(sps, i); |
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if (ret) |
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return ret; |
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} |
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ret = of_genpd_add_provider_onecell(pdev->dev.of_node, &sps->genpd_data); |
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if (ret) { |
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dev_err(&pdev->dev, "failed to add provider (%d)", ret); |
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return ret; |
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} |
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return 0; |
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} |
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static const struct owl_sps_domain_info s500_sps_domains[] = { |
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[S500_PD_VDE] = { |
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.name = "VDE", |
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.pwr_bit = 0, |
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.ack_bit = 16, |
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}, |
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[S500_PD_VCE_SI] = { |
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.name = "VCE_SI", |
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.pwr_bit = 1, |
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.ack_bit = 17, |
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}, |
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[S500_PD_USB2_1] = { |
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.name = "USB2_1", |
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.pwr_bit = 2, |
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.ack_bit = 18, |
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}, |
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[S500_PD_CPU2] = { |
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.name = "CPU2", |
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.pwr_bit = 5, |
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.ack_bit = 21, |
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.genpd_flags = GENPD_FLAG_ALWAYS_ON, |
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}, |
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[S500_PD_CPU3] = { |
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.name = "CPU3", |
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.pwr_bit = 6, |
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.ack_bit = 22, |
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.genpd_flags = GENPD_FLAG_ALWAYS_ON, |
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}, |
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[S500_PD_DMA] = { |
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.name = "DMA", |
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.pwr_bit = 8, |
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.ack_bit = 12, |
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}, |
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[S500_PD_DS] = { |
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.name = "DS", |
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.pwr_bit = 9, |
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.ack_bit = 13, |
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}, |
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[S500_PD_USB3] = { |
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.name = "USB3", |
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.pwr_bit = 10, |
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.ack_bit = 14, |
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}, |
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[S500_PD_USB2_0] = { |
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.name = "USB2_0", |
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.pwr_bit = 11, |
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.ack_bit = 15, |
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}, |
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}; |
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static const struct owl_sps_info s500_sps_info = { |
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.num_domains = ARRAY_SIZE(s500_sps_domains), |
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.domains = s500_sps_domains, |
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}; |
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static const struct owl_sps_domain_info s700_sps_domains[] = { |
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[S700_PD_VDE] = { |
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.name = "VDE", |
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.pwr_bit = 0, |
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}, |
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[S700_PD_VCE_SI] = { |
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.name = "VCE_SI", |
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.pwr_bit = 1, |
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}, |
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[S700_PD_USB2_1] = { |
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.name = "USB2_1", |
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.pwr_bit = 2, |
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}, |
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[S700_PD_HDE] = { |
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.name = "HDE", |
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.pwr_bit = 7, |
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}, |
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[S700_PD_DMA] = { |
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.name = "DMA", |
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.pwr_bit = 8, |
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}, |
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[S700_PD_DS] = { |
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.name = "DS", |
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.pwr_bit = 9, |
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}, |
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[S700_PD_USB3] = { |
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.name = "USB3", |
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.pwr_bit = 10, |
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}, |
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[S700_PD_USB2_0] = { |
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.name = "USB2_0", |
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.pwr_bit = 11, |
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}, |
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}; |
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static const struct owl_sps_info s700_sps_info = { |
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.num_domains = ARRAY_SIZE(s700_sps_domains), |
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.domains = s700_sps_domains, |
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}; |
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static const struct owl_sps_domain_info s900_sps_domains[] = { |
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[S900_PD_GPU_B] = { |
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.name = "GPU_B", |
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.pwr_bit = 3, |
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}, |
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[S900_PD_VCE] = { |
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.name = "VCE", |
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.pwr_bit = 4, |
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}, |
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[S900_PD_SENSOR] = { |
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.name = "SENSOR", |
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.pwr_bit = 5, |
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}, |
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[S900_PD_VDE] = { |
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.name = "VDE", |
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.pwr_bit = 6, |
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}, |
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[S900_PD_HDE] = { |
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.name = "HDE", |
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.pwr_bit = 7, |
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}, |
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[S900_PD_USB3] = { |
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.name = "USB3", |
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.pwr_bit = 8, |
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}, |
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[S900_PD_DDR0] = { |
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.name = "DDR0", |
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.pwr_bit = 9, |
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}, |
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[S900_PD_DDR1] = { |
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.name = "DDR1", |
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.pwr_bit = 10, |
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}, |
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[S900_PD_DE] = { |
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.name = "DE", |
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.pwr_bit = 13, |
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}, |
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[S900_PD_NAND] = { |
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.name = "NAND", |
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.pwr_bit = 14, |
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}, |
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[S900_PD_USB2_H0] = { |
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.name = "USB2_H0", |
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.pwr_bit = 15, |
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}, |
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[S900_PD_USB2_H1] = { |
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.name = "USB2_H1", |
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.pwr_bit = 16, |
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}, |
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}; |
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static const struct owl_sps_info s900_sps_info = { |
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.num_domains = ARRAY_SIZE(s900_sps_domains), |
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.domains = s900_sps_domains, |
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}; |
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static const struct of_device_id owl_sps_of_matches[] = { |
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{ .compatible = "actions,s500-sps", .data = &s500_sps_info }, |
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{ .compatible = "actions,s700-sps", .data = &s700_sps_info }, |
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{ .compatible = "actions,s900-sps", .data = &s900_sps_info }, |
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{ } |
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}; |
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static struct platform_driver owl_sps_platform_driver = { |
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.probe = owl_sps_probe, |
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.driver = { |
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.name = "owl-sps", |
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.of_match_table = owl_sps_of_matches, |
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.suppress_bind_attrs = true, |
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}, |
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}; |
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static int __init owl_sps_init(void) |
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{ |
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return platform_driver_register(&owl_sps_platform_driver); |
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} |
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postcore_initcall(owl_sps_init);
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