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Message-ID: <20150209100744.GA5834@gmail.com>
Date: Mon, 9 Feb 2015 11:07:44 +0100
From: Ingo Molnar <mingo@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] x86/platform updates for v3.20
Linus,
Please pull the latest x86-platform-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-platform-for-linus
# HEAD: 0e1540208ef34a2246822fa56f751efe23748e7a x86: pmc_atom: Expose contents of PSS
Various Intel Atom SoC updates (mostly to enhance
debuggability), plus an apb_timer cleanup.
Thanks,
Ingo
------------------>
Andy Shevchenko (5):
x86: pmc-atom: Assign debugfs node as soon as possible
x86: pmc_atom: don%27t check for NULL twice
x86: pmc-atom: Remove unused macro
x86: pmc_atom: Clean up init function
x86: pmc_atom: Expose contents of PSS
Rickard Strandqvist (1):
x86/platform: Remove unused function from apb_timer.c
arch/x86/include/asm/pmc_atom.h | 22 +++++++++++
arch/x86/kernel/apb_timer.c | 8 ----
arch/x86/kernel/pmc_atom.c | 81 ++++++++++++++++++++++++++++++++---------
3 files changed, 86 insertions(+), 25 deletions(-)
diff --git a/arch/x86/include/asm/pmc_atom.h b/arch/x86/include/asm/pmc_atom.h
index fc7a17c05d35..bc0fc0866553 100644
--- a/arch/x86/include/asm/pmc_atom.h
+++ b/arch/x86/include/asm/pmc_atom.h
@@ -53,6 +53,28 @@
/* Sleep state counter is in units of of 32us */
#define PMC_TMR_SHIFT 5
+/* Power status of power islands */
+#define PMC_PSS 0x98
+
+#define PMC_PSS_BIT_GBE BIT(0)
+#define PMC_PSS_BIT_SATA BIT(1)
+#define PMC_PSS_BIT_HDA BIT(2)
+#define PMC_PSS_BIT_SEC BIT(3)
+#define PMC_PSS_BIT_PCIE BIT(4)
+#define PMC_PSS_BIT_LPSS BIT(5)
+#define PMC_PSS_BIT_LPE BIT(6)
+#define PMC_PSS_BIT_DFX BIT(7)
+#define PMC_PSS_BIT_USH_CTRL BIT(8)
+#define PMC_PSS_BIT_USH_SUS BIT(9)
+#define PMC_PSS_BIT_USH_VCCS BIT(10)
+#define PMC_PSS_BIT_USH_VCCA BIT(11)
+#define PMC_PSS_BIT_OTG_CTRL BIT(12)
+#define PMC_PSS_BIT_OTG_VCCS BIT(13)
+#define PMC_PSS_BIT_OTG_VCCA_CLK BIT(14)
+#define PMC_PSS_BIT_OTG_VCCA BIT(15)
+#define PMC_PSS_BIT_USB BIT(16)
+#define PMC_PSS_BIT_USB_SUS BIT(17)
+
/* These registers reflect D3 status of functions */
#define PMC_D3_STS_0 0xA0
diff --git a/arch/x86/kernel/apb_timer.c b/arch/x86/kernel/apb_timer.c
index b708738d016e..6a7c23ff21d3 100644
--- a/arch/x86/kernel/apb_timer.c
+++ b/arch/x86/kernel/apb_timer.c
@@ -135,14 +135,6 @@ static inline void apbt_clear_mapping(void)
apbt_virt_address = NULL;
}
-/*
- * APBT timer interrupt enable / disable
- */
-static inline int is_apbt_capable(void)
-{
- return apbt_virt_address ? 1 : 0;
-}
-
static int __init apbt_clockevent_register(void)
{
struct sfi_timer_table_entry *mtmr;
diff --git a/arch/x86/kernel/pmc_atom.c b/arch/x86/kernel/pmc_atom.c
index 0ee5025e0fa4..d66a4fe6caee 100644
--- a/arch/x86/kernel/pmc_atom.c
+++ b/arch/x86/kernel/pmc_atom.c
@@ -25,8 +25,6 @@
#include <asm/pmc_atom.h>
-#define DRIVER_NAME KBUILD_MODNAME
-
struct pmc_dev {
u32 base_addr;
void __iomem *regmap;
@@ -38,12 +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},
@@ -82,6 +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);
@@ -169,6 +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;
@@ -202,11 +247,7 @@ static const struct file_operations pmc_sleep_tmr_ops = {
static void pmc_dbgfs_unregister(struct pmc_dev *pmc)
{
- if (!pmc->dbgfs_dir)
- return;
-
debugfs_remove_recursive(pmc->dbgfs_dir);
- pmc->dbgfs_dir = NULL;
}
static int pmc_dbgfs_register(struct pmc_dev *pmc, struct pci_dev *pdev)
@@ -217,19 +258,29 @@ static int pmc_dbgfs_register(struct pmc_dev *pmc, struct pci_dev *pdev)
if (!dir)
return -ENOMEM;
+ pmc->dbgfs_dir = dir;
+
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) {
dev_err(&pdev->dev, "sleep_state register failed\n");
goto err;
}
- pmc->dbgfs_dir = dir;
+
return 0;
err:
pmc_dbgfs_unregister(pmc);
@@ -292,7 +343,6 @@ MODULE_DEVICE_TABLE(pci, pmc_pci_ids);
static int __init pmc_atom_init(void)
{
- int err = -ENODEV;
struct pci_dev *pdev = NULL;
const struct pci_device_id *ent;
@@ -306,14 +356,11 @@ static int __init pmc_atom_init(void)
*/
for_each_pci_dev(pdev) {
ent = pci_match_id(pmc_pci_ids, pdev);
- if (ent) {
- err = pmc_setup_dev(pdev);
- goto out;
- }
+ if (ent)
+ return pmc_setup_dev(pdev);
}
/* Device not found. */
-out:
- return err;
+ return -ENODEV;
}
module_init(pmc_atom_init);
--
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