From: David E. Box Date: Sat, 17 Apr 2021 03:12:45 +0000 (-0700) Subject: platform/x86: intel_pmc_core: Remove global struct pmc_dev X-Git-Tag: accepted/tizen/unified/20230118.172025~7417^2~13 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7dc4dc563dd40c596f72aa4e8ba4d61c82ab73c5;p=platform%2Fkernel%2Flinux-rpi.git platform/x86: intel_pmc_core: Remove global struct pmc_dev The intel_pmc_core driver did not always bind to a device which meant it lacked a struct device that could be used to maintain driver data. So a global instance of struct pmc_dev was used for this purpose and functions accessed this directly. Since the driver now binds to an ACPI device, remove the global pmc_dev in favor of one that is allocated during probe. Modify users of the global to obtain the object by argument instead. Signed-off-by: David E. Box Reviewed-by: Hans de Goede Reviewed-by: Rajneesh Bhardwaj Link: https://lore.kernel.org/r/20210417031252.3020837-3-david.e.box@linux.intel.com Signed-off-by: Hans de Goede --- diff --git a/drivers/platform/x86/intel_pmc_core.c b/drivers/platform/x86/intel_pmc_core.c index 0765753..e8474d1 100644 --- a/drivers/platform/x86/intel_pmc_core.c +++ b/drivers/platform/x86/intel_pmc_core.c @@ -31,8 +31,6 @@ #include "intel_pmc_core.h" -static struct pmc_dev pmc; - /* PKGC MSRs are common across Intel Core SoCs */ static const struct pmc_bit_map msr_map[] = { {"Package C2", MSR_PKG_C2_RESIDENCY}, @@ -729,9 +727,8 @@ static int pmc_core_dev_state_get(void *data, u64 *val) DEFINE_DEBUGFS_ATTRIBUTE(pmc_core_dev_state, pmc_core_dev_state_get, NULL, "%llu\n"); -static int pmc_core_check_read_lock_bit(void) +static int pmc_core_check_read_lock_bit(struct pmc_dev *pmcdev) { - struct pmc_dev *pmcdev = &pmc; u32 value; value = pmc_core_reg_read(pmcdev, pmcdev->map->pm_cfg_offset); @@ -856,28 +853,26 @@ static int pmc_core_ppfear_show(struct seq_file *s, void *unused) DEFINE_SHOW_ATTRIBUTE(pmc_core_ppfear); /* This function should return link status, 0 means ready */ -static int pmc_core_mtpmc_link_status(void) +static int pmc_core_mtpmc_link_status(struct pmc_dev *pmcdev) { - struct pmc_dev *pmcdev = &pmc; u32 value; value = pmc_core_reg_read(pmcdev, SPT_PMC_PM_STS_OFFSET); return value & BIT(SPT_PMC_MSG_FULL_STS_BIT); } -static int pmc_core_send_msg(u32 *addr_xram) +static int pmc_core_send_msg(struct pmc_dev *pmcdev, u32 *addr_xram) { - struct pmc_dev *pmcdev = &pmc; u32 dest; int timeout; for (timeout = NUM_RETRIES; timeout > 0; timeout--) { - if (pmc_core_mtpmc_link_status() == 0) + if (pmc_core_mtpmc_link_status(pmcdev) == 0) break; msleep(5); } - if (timeout <= 0 && pmc_core_mtpmc_link_status()) + if (timeout <= 0 && pmc_core_mtpmc_link_status(pmcdev)) return -EBUSY; dest = (*addr_xram & MTPMC_MASK) | (1U << 1); @@ -903,7 +898,7 @@ static int pmc_core_mphy_pg_show(struct seq_file *s, void *unused) mutex_lock(&pmcdev->lock); - if (pmc_core_send_msg(&mphy_core_reg_low) != 0) { + if (pmc_core_send_msg(pmcdev, &mphy_core_reg_low) != 0) { err = -EBUSY; goto out_unlock; } @@ -911,7 +906,7 @@ static int pmc_core_mphy_pg_show(struct seq_file *s, void *unused) msleep(10); val_low = pmc_core_reg_read(pmcdev, SPT_PMC_MFPMC_OFFSET); - if (pmc_core_send_msg(&mphy_core_reg_high) != 0) { + if (pmc_core_send_msg(pmcdev, &mphy_core_reg_high) != 0) { err = -EBUSY; goto out_unlock; } @@ -954,7 +949,7 @@ static int pmc_core_pll_show(struct seq_file *s, void *unused) mphy_common_reg = (SPT_PMC_MPHY_COM_STS_0 << 16); mutex_lock(&pmcdev->lock); - if (pmc_core_send_msg(&mphy_common_reg) != 0) { + if (pmc_core_send_msg(pmcdev, &mphy_common_reg) != 0) { err = -EBUSY; goto out_unlock; } @@ -975,9 +970,8 @@ out_unlock: } DEFINE_SHOW_ATTRIBUTE(pmc_core_pll); -static int pmc_core_send_ltr_ignore(u32 value) +static int pmc_core_send_ltr_ignore(struct pmc_dev *pmcdev, u32 value) { - struct pmc_dev *pmcdev = &pmc; const struct pmc_reg_map *map = pmcdev->map; u32 reg; int err = 0; @@ -1003,6 +997,8 @@ static ssize_t pmc_core_ltr_ignore_write(struct file *file, const char __user *userbuf, size_t count, loff_t *ppos) { + struct seq_file *s = file->private_data; + struct pmc_dev *pmcdev = s->private; u32 buf_size, value; int err; @@ -1012,7 +1008,7 @@ static ssize_t pmc_core_ltr_ignore_write(struct file *file, if (err) return err; - err = pmc_core_send_ltr_ignore(value); + err = pmc_core_send_ltr_ignore(pmcdev, value); return err == 0 ? count : err; } @@ -1340,13 +1336,19 @@ static void pmc_core_do_dmi_quirks(struct pmc_dev *pmcdev) static int pmc_core_probe(struct platform_device *pdev) { static bool device_initialized; - struct pmc_dev *pmcdev = &pmc; + struct pmc_dev *pmcdev; const struct x86_cpu_id *cpu_id; u64 slp_s0_addr; if (device_initialized) return -ENODEV; + pmcdev = devm_kzalloc(&pdev->dev, sizeof(*pmcdev), GFP_KERNEL); + if (!pmcdev) + return -ENOMEM; + + platform_set_drvdata(pdev, pmcdev); + cpu_id = x86_match_cpu(intel_pmc_core_ids); if (!cpu_id) return -ENODEV; @@ -1376,8 +1378,7 @@ static int pmc_core_probe(struct platform_device *pdev) return -ENOMEM; mutex_init(&pmcdev->lock); - platform_set_drvdata(pdev, pmcdev); - pmcdev->pmc_xram_read_bit = pmc_core_check_read_lock_bit(); + pmcdev->pmc_xram_read_bit = pmc_core_check_read_lock_bit(pmcdev); pmc_core_do_dmi_quirks(pmcdev); /* @@ -1386,7 +1387,7 @@ static int pmc_core_probe(struct platform_device *pdev) */ if (pmcdev->map == &tgl_reg_map) { dev_dbg(&pdev->dev, "ignoring GBE LTR\n"); - pmc_core_send_ltr_ignore(3); + pmc_core_send_ltr_ignore(pmcdev, 3); } pmc_core_dbgfs_register(pmcdev);