diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-24 10:39:22 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-24 10:39:22 -0700 |
commit | 2e368dd2bbeac6bfd50886371db185b1092067b4 (patch) | |
tree | c7a1f0e91e48bc13e56684a46b7429fa3d1652eb /drivers/soc/ti/ti_sci_pm_domains.c | |
parent | e731f3146ff3bba5424b40140e1a7e6f92e94964 (diff) | |
parent | 9f7f26930035f557838e215797cb620b563b98ab (diff) | |
download | linux-2e368dd2bbeac6bfd50886371db185b1092067b4.tar.bz2 |
Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC-related driver updates from Olof Johansson:
"Various driver updates for platforms. A bulk of this is smaller fixes
or cleanups, but some of the new material this time around is:
- Support for Nvidia Tegra234 SoC
- Ring accelerator support for TI AM65x
- PRUSS driver for TI platforms
- Renesas support for R-Car V3U SoC
- Reset support for Cortex-M4 processor on i.MX8MQ
There are also new socinfo entries for a handful of different SoCs and
platforms"
* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (131 commits)
drm/mediatek: reduce clear event
soc: mediatek: cmdq: add clear option in cmdq_pkt_wfe api
soc: mediatek: cmdq: add jump function
soc: mediatek: cmdq: add write_s_mask value function
soc: mediatek: cmdq: add write_s value function
soc: mediatek: cmdq: add read_s function
soc: mediatek: cmdq: add write_s_mask function
soc: mediatek: cmdq: add write_s function
soc: mediatek: cmdq: add address shift in jump
soc: mediatek: mtk-infracfg: Fix kerneldoc
soc: amlogic: pm-domains: use always-on flag
reset: sti: reset-syscfg: fix struct description warnings
reset: imx7: add the cm4 reset for i.MX8MQ
dt-bindings: reset: imx8mq: add m4 reset
reset: Fix and extend kerneldoc
reset: reset-zynqmp: Added support for Versal platform
dt-bindings: reset: Updated binding for Versal reset driver
reset: imx7: Support module build
soc: fsl: qe: Remove unnessesary check in ucc_set_tdm_rxtx_clk
soc: fsl: qman: convert to use be32_add_cpu()
...
Diffstat (limited to 'drivers/soc/ti/ti_sci_pm_domains.c')
-rw-r--r-- | drivers/soc/ti/ti_sci_pm_domains.c | 251 |
1 files changed, 121 insertions, 130 deletions
diff --git a/drivers/soc/ti/ti_sci_pm_domains.c b/drivers/soc/ti/ti_sci_pm_domains.c index 8c2a2f23982c..af2126d2b2ff 100644 --- a/drivers/soc/ti/ti_sci_pm_domains.c +++ b/drivers/soc/ti/ti_sci_pm_domains.c @@ -9,7 +9,6 @@ #include <linux/err.h> #include <linux/module.h> -#include <linux/mutex.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pm_domain.h> @@ -18,150 +17,95 @@ #include <dt-bindings/soc/ti,sci_pm_domain.h> /** - * struct ti_sci_genpd_dev_data: holds data needed for every device attached - * to this genpd - * @idx: index of the device that identifies it with the system - * control processor. - * @exclusive: Permissions for exclusive request or shared request of the - * device. + * struct ti_sci_genpd_provider: holds common TI SCI genpd provider data + * @ti_sci: handle to TI SCI protocol driver that provides ops to + * communicate with system control processor. + * @dev: pointer to dev for the driver for devm allocs + * @pd_list: list of all the power domains on the device + * @data: onecell data for genpd core */ -struct ti_sci_genpd_dev_data { - int idx; - u8 exclusive; +struct ti_sci_genpd_provider { + const struct ti_sci_handle *ti_sci; + struct device *dev; + struct list_head pd_list; + struct genpd_onecell_data data; }; /** * struct ti_sci_pm_domain: TI specific data needed for power domain - * @ti_sci: handle to TI SCI protocol driver that provides ops to - * communicate with system control processor. - * @dev: pointer to dev for the driver for devm allocs + * @idx: index of the device that identifies it with the system + * control processor. + * @exclusive: Permissions for exclusive request or shared request of the + * device. * @pd: generic_pm_domain for use with the genpd framework + * @node: link for the genpd list + * @parent: link to the parent TI SCI genpd provider */ struct ti_sci_pm_domain { - const struct ti_sci_handle *ti_sci; - struct device *dev; + int idx; + u8 exclusive; struct generic_pm_domain pd; + struct list_head node; + struct ti_sci_genpd_provider *parent; }; #define genpd_to_ti_sci_pd(gpd) container_of(gpd, struct ti_sci_pm_domain, pd) -/** - * ti_sci_dev_id(): get prepopulated ti_sci id from struct dev - * @dev: pointer to device associated with this genpd - * - * Returns device_id stored from ti,sci_id property - */ -static int ti_sci_dev_id(struct device *dev) -{ - struct generic_pm_domain_data *genpd_data = dev_gpd_data(dev); - struct ti_sci_genpd_dev_data *sci_dev_data = genpd_data->data; - - return sci_dev_data->idx; -} - -static u8 is_ti_sci_dev_exclusive(struct device *dev) -{ - struct generic_pm_domain_data *genpd_data = dev_gpd_data(dev); - struct ti_sci_genpd_dev_data *sci_dev_data = genpd_data->data; - - return sci_dev_data->exclusive; -} - -/** - * ti_sci_dev_to_sci_handle(): get pointer to ti_sci_handle - * @dev: pointer to device associated with this genpd - * - * Returns ti_sci_handle to be used to communicate with system - * control processor. +/* + * ti_sci_pd_power_off(): genpd power down hook + * @domain: pointer to the powerdomain to power off */ -static const struct ti_sci_handle *ti_sci_dev_to_sci_handle(struct device *dev) +static int ti_sci_pd_power_off(struct generic_pm_domain *domain) { - struct generic_pm_domain *pd = pd_to_genpd(dev->pm_domain); - struct ti_sci_pm_domain *ti_sci_genpd = genpd_to_ti_sci_pd(pd); + struct ti_sci_pm_domain *pd = genpd_to_ti_sci_pd(domain); + const struct ti_sci_handle *ti_sci = pd->parent->ti_sci; - return ti_sci_genpd->ti_sci; + return ti_sci->ops.dev_ops.put_device(ti_sci, pd->idx); } -/** - * ti_sci_dev_start(): genpd device start hook called to turn device on - * @dev: pointer to device associated with this genpd to be powered on +/* + * ti_sci_pd_power_on(): genpd power up hook + * @domain: pointer to the powerdomain to power on */ -static int ti_sci_dev_start(struct device *dev) +static int ti_sci_pd_power_on(struct generic_pm_domain *domain) { - const struct ti_sci_handle *ti_sci = ti_sci_dev_to_sci_handle(dev); - int idx = ti_sci_dev_id(dev); + struct ti_sci_pm_domain *pd = genpd_to_ti_sci_pd(domain); + const struct ti_sci_handle *ti_sci = pd->parent->ti_sci; - if (is_ti_sci_dev_exclusive(dev)) - return ti_sci->ops.dev_ops.get_device_exclusive(ti_sci, idx); + if (pd->exclusive) + return ti_sci->ops.dev_ops.get_device_exclusive(ti_sci, + pd->idx); else - return ti_sci->ops.dev_ops.get_device(ti_sci, idx); + return ti_sci->ops.dev_ops.get_device(ti_sci, pd->idx); } -/** - * ti_sci_dev_stop(): genpd device stop hook called to turn device off - * @dev: pointer to device associated with this genpd to be powered off +/* + * ti_sci_pd_xlate(): translation service for TI SCI genpds + * @genpdspec: DT identification data for the genpd + * @data: genpd core data for all the powerdomains on the device */ -static int ti_sci_dev_stop(struct device *dev) +static struct generic_pm_domain *ti_sci_pd_xlate( + struct of_phandle_args *genpdspec, + void *data) { - const struct ti_sci_handle *ti_sci = ti_sci_dev_to_sci_handle(dev); - int idx = ti_sci_dev_id(dev); + struct genpd_onecell_data *genpd_data = data; + unsigned int idx = genpdspec->args[0]; - return ti_sci->ops.dev_ops.put_device(ti_sci, idx); -} + if (genpdspec->args_count < 2) + return ERR_PTR(-EINVAL); -static int ti_sci_pd_attach_dev(struct generic_pm_domain *domain, - struct device *dev) -{ - struct device_node *np = dev->of_node; - struct of_phandle_args pd_args; - struct ti_sci_pm_domain *ti_sci_genpd = genpd_to_ti_sci_pd(domain); - const struct ti_sci_handle *ti_sci = ti_sci_genpd->ti_sci; - struct ti_sci_genpd_dev_data *sci_dev_data; - struct generic_pm_domain_data *genpd_data; - int idx, ret = 0; - - ret = of_parse_phandle_with_args(np, "power-domains", - "#power-domain-cells", 0, &pd_args); - if (ret < 0) - return ret; - - if (pd_args.args_count != 1 && pd_args.args_count != 2) - return -EINVAL; - - idx = pd_args.args[0]; - - /* - * Check the validity of the requested idx, if the index is not valid - * the PMMC will return a NAK here and we will not allocate it. - */ - ret = ti_sci->ops.dev_ops.is_valid(ti_sci, idx); - if (ret) - return -EINVAL; - - sci_dev_data = kzalloc(sizeof(*sci_dev_data), GFP_KERNEL); - if (!sci_dev_data) - return -ENOMEM; + if (idx >= genpd_data->num_domains) { + pr_err("%s: invalid domain index %u\n", __func__, idx); + return ERR_PTR(-EINVAL); + } - sci_dev_data->idx = idx; - /* Enable the exclusive permissions by default */ - sci_dev_data->exclusive = TI_SCI_PD_EXCLUSIVE; - if (pd_args.args_count == 2) - sci_dev_data->exclusive = pd_args.args[1] & 0x1; + if (!genpd_data->domains[idx]) + return ERR_PTR(-ENOENT); - genpd_data = dev_gpd_data(dev); - genpd_data->data = sci_dev_data; + genpd_to_ti_sci_pd(genpd_data->domains[idx])->exclusive = + genpdspec->args[1]; - return 0; -} - -static void ti_sci_pd_detach_dev(struct generic_pm_domain *domain, - struct device *dev) -{ - struct generic_pm_domain_data *genpd_data = dev_gpd_data(dev); - struct ti_sci_genpd_dev_data *sci_dev_data = genpd_data->data; - - kfree(sci_dev_data); - genpd_data->data = NULL; + return genpd_data->domains[idx]; } static const struct of_device_id ti_sci_pm_domain_matches[] = { @@ -173,33 +117,80 @@ MODULE_DEVICE_TABLE(of, ti_sci_pm_domain_matches); static int ti_sci_pm_domain_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; - struct device_node *np = dev->of_node; - struct ti_sci_pm_domain *ti_sci_pd; + struct ti_sci_genpd_provider *pd_provider; + struct ti_sci_pm_domain *pd; + struct device_node *np = NULL; + struct of_phandle_args args; int ret; + u32 max_id = 0; + int index; - ti_sci_pd = devm_kzalloc(dev, sizeof(*ti_sci_pd), GFP_KERNEL); - if (!ti_sci_pd) + pd_provider = devm_kzalloc(dev, sizeof(*pd_provider), GFP_KERNEL); + if (!pd_provider) return -ENOMEM; - ti_sci_pd->ti_sci = devm_ti_sci_get_handle(dev); - if (IS_ERR(ti_sci_pd->ti_sci)) - return PTR_ERR(ti_sci_pd->ti_sci); + pd_provider->ti_sci = devm_ti_sci_get_handle(dev); + if (IS_ERR(pd_provider->ti_sci)) + return PTR_ERR(pd_provider->ti_sci); + + pd_provider->dev = dev; + + INIT_LIST_HEAD(&pd_provider->pd_list); + + /* Find highest device ID used for power domains */ + while (1) { + np = of_find_node_with_property(np, "power-domains"); + if (!np) + break; + + index = 0; + + while (1) { + ret = of_parse_phandle_with_args(np, "power-domains", + "#power-domain-cells", + index, &args); + if (ret) + break; + + if (args.args_count >= 1 && args.np == dev->of_node) { + if (args.args[0] > max_id) + max_id = args.args[0]; + + pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); + if (!pd) + return -ENOMEM; + + pd->pd.name = devm_kasprintf(dev, GFP_KERNEL, + "pd:%d", + args.args[0]); + if (!pd->pd.name) + return -ENOMEM; - ti_sci_pd->dev = dev; + pd->pd.power_off = ti_sci_pd_power_off; + pd->pd.power_on = ti_sci_pd_power_on; + pd->idx = args.args[0]; + pd->parent = pd_provider; - ti_sci_pd->pd.name = "ti_sci_pd"; + pm_genpd_init(&pd->pd, NULL, true); - ti_sci_pd->pd.attach_dev = ti_sci_pd_attach_dev; - ti_sci_pd->pd.detach_dev = ti_sci_pd_detach_dev; + list_add(&pd->node, &pd_provider->pd_list); + } + index++; + } + } - ti_sci_pd->pd.dev_ops.start = ti_sci_dev_start; - ti_sci_pd->pd.dev_ops.stop = ti_sci_dev_stop; + pd_provider->data.domains = + devm_kcalloc(dev, max_id + 1, + sizeof(*pd_provider->data.domains), + GFP_KERNEL); - pm_genpd_init(&ti_sci_pd->pd, NULL, true); + pd_provider->data.num_domains = max_id + 1; + pd_provider->data.xlate = ti_sci_pd_xlate; - ret = of_genpd_add_provider_simple(np, &ti_sci_pd->pd); + list_for_each_entry(pd, &pd_provider->pd_list, node) + pd_provider->data.domains[pd->idx] = &pd->pd; - return ret; + return of_genpd_add_provider_onecell(dev->of_node, &pd_provider->data); } static struct platform_driver ti_sci_pm_domains_driver = { |