From 0e1540208ef34a2246822fa56f751efe23748e7a Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Wed, 14 Jan 2015 18:39:35 +0200 Subject: x86: pmc_atom: Expose contents of PSS The PSS register reflects the power state of each island on SoC. It would be useful to know which of the islands is on or off at the momemnt. Signed-off-by: Andy Shevchenko Acked-by: Aubrey Li Cc: Rafael J. Wysocki Cc: Kumar P. Mahesh Link: http://lkml.kernel.org/r/1421253575-22509-6-git-send-email-andriy.shevchenko@linux.intel.com Signed-off-by: Thomas Gleixner --- arch/x86/kernel/pmc_atom.c | 61 +++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 58 insertions(+), 3 deletions(-) (limited to 'arch/x86/kernel/pmc_atom.c') diff --git a/arch/x86/kernel/pmc_atom.c b/arch/x86/kernel/pmc_atom.c index f8becc43295..d66a4fe6cae 100644 --- a/arch/x86/kernel/pmc_atom.c +++ b/arch/x86/kernel/pmc_atom.c @@ -36,12 +36,12 @@ struct pmc_dev { static struct pmc_dev pmc_device; static u32 acpi_base_addr; -struct pmc_dev_map { +struct pmc_bit_map { const char *name; u32 bit_mask; }; -static const struct pmc_dev_map dev_map[] = { +static const struct pmc_bit_map dev_map[] = { {"0 - LPSS1_F0_DMA", BIT_LPSS1_F0_DMA}, {"1 - LPSS1_F1_PWM1", BIT_LPSS1_F1_PWM1}, {"2 - LPSS1_F2_PWM2", BIT_LPSS1_F2_PWM2}, @@ -80,6 +80,27 @@ static const struct pmc_dev_map dev_map[] = { {"35 - DFX", BIT_DFX}, }; +static const struct pmc_bit_map pss_map[] = { + {"0 - GBE", PMC_PSS_BIT_GBE}, + {"1 - SATA", PMC_PSS_BIT_SATA}, + {"2 - HDA", PMC_PSS_BIT_HDA}, + {"3 - SEC", PMC_PSS_BIT_SEC}, + {"4 - PCIE", PMC_PSS_BIT_PCIE}, + {"5 - LPSS", PMC_PSS_BIT_LPSS}, + {"6 - LPE", PMC_PSS_BIT_LPE}, + {"7 - DFX", PMC_PSS_BIT_DFX}, + {"8 - USH_CTRL", PMC_PSS_BIT_USH_CTRL}, + {"9 - USH_SUS", PMC_PSS_BIT_USH_SUS}, + {"10 - USH_VCCS", PMC_PSS_BIT_USH_VCCS}, + {"11 - USH_VCCA", PMC_PSS_BIT_USH_VCCA}, + {"12 - OTG_CTRL", PMC_PSS_BIT_OTG_CTRL}, + {"13 - OTG_VCCS", PMC_PSS_BIT_OTG_VCCS}, + {"14 - OTG_VCCA_CLK", PMC_PSS_BIT_OTG_VCCA_CLK}, + {"15 - OTG_VCCA", PMC_PSS_BIT_OTG_VCCA}, + {"16 - USB", PMC_PSS_BIT_USB}, + {"17 - USB_SUS", PMC_PSS_BIT_USB_SUS}, +}; + static inline u32 pmc_reg_read(struct pmc_dev *pmc, int reg_offset) { return readl(pmc->regmap + reg_offset); @@ -167,6 +188,32 @@ static const struct file_operations pmc_dev_state_ops = { .release = single_release, }; +static int pmc_pss_state_show(struct seq_file *s, void *unused) +{ + struct pmc_dev *pmc = s->private; + u32 pss = pmc_reg_read(pmc, PMC_PSS); + int pss_index; + + for (pss_index = 0; pss_index < ARRAY_SIZE(pss_map); pss_index++) { + seq_printf(s, "Island: %-32s\tState: %s\n", + pss_map[pss_index].name, + pss_map[pss_index].bit_mask & pss ? "Off" : "On"); + } + return 0; +} + +static int pmc_pss_state_open(struct inode *inode, struct file *file) +{ + return single_open(file, pmc_pss_state_show, inode->i_private); +} + +static const struct file_operations pmc_pss_state_ops = { + .open = pmc_pss_state_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + static int pmc_sleep_tmr_show(struct seq_file *s, void *unused) { struct pmc_dev *pmc = s->private; @@ -216,9 +263,17 @@ static int pmc_dbgfs_register(struct pmc_dev *pmc, struct pci_dev *pdev) f = debugfs_create_file("dev_state", S_IFREG | S_IRUGO, dir, pmc, &pmc_dev_state_ops); if (!f) { - dev_err(&pdev->dev, "dev_states register failed\n"); + dev_err(&pdev->dev, "dev_state register failed\n"); goto err; } + + f = debugfs_create_file("pss_state", S_IFREG | S_IRUGO, + dir, pmc, &pmc_pss_state_ops); + if (!f) { + dev_err(&pdev->dev, "pss_state register failed\n"); + goto err; + } + f = debugfs_create_file("sleep_state", S_IFREG | S_IRUGO, dir, pmc, &pmc_sleep_tmr_ops); if (!f) { -- cgit v1.2.3-70-g09d2