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Date: Wed, 5 Nov 2014 22:05:34 +0530
From: Mahesh Kumar P <mahesh.kumar.p@...el.com>
To: linux-pm@...r.kernel.org, rafael.j.wysocki@...el.com,
len.brown@...el.com, aubrey.li@...el.com
Cc: linux-kernel@...r.kernel.org, mahesh.kumar.p@...el.com
Subject: [PATCH 3/3] PMC Driver : Expose the power gate status for CHT
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 moment.
The patch adds the Pwr Gate status interface to CHT
Signed-off-by: Kumar P Mahesh <mahesh.kumar.p@...el.com>
---
arch/x86/include/asm/pmc_atom.h | 20 +++++++++++++++++++-
arch/x86/kernel/pmc_atom.c | 33 +++++++++++++++++++++++++++++++--
2 files changed, 50 insertions(+), 3 deletions(-)
diff --git a/arch/x86/include/asm/pmc_atom.h b/arch/x86/include/asm/pmc_atom.h
index 7f09fe0..d634125 100644
--- a/arch/x86/include/asm/pmc_atom.h
+++ b/arch/x86/include/asm/pmc_atom.h
@@ -47,13 +47,16 @@
/* Power gate status register */
#define PMC_PSS 0x98
-#define PMC_PSS_BIT_GBE BIT(0)
+/* common bit definition */
#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)
+
+/* BYT specific bits */
+#define PMC_PSS_BIT_GBE BIT(0)
#define PMC_PSS_BIT_DFX BIT(7)
#define PMC_PSS_BIT_USH_CTRL BIT(8)
#define PMC_PSS_BIT_USH_SUS BIT(9)
@@ -66,6 +69,21 @@
#define PMC_PSS_BIT_USB BIT(16)
#define PMC_PSS_BIT_USB_SUS BIT(17)
+/* CHT specific bits */
+#define PMC_PSS_BIT_UFS BIT(7)
+#define PMC_PSS_BIT_UXD BIT(11)
+#define PMC_PSS_BIT_UXD_FD BIT(12)
+#define PMC_PSS_BIT_UX_ENG BIT(15)
+#define PMC_PSS_BIT_USB_SUS_CHT BIT(16)
+#define PMC_PSS_BIT_GMM BIT(17)
+#define PMC_PSS_BIT_ISH BIT(18)
+#define PMC_PSS_BIT_DFX_MASTER BIT(26)
+#define PMC_PSS_BIT_DFX_CLSTR1 BIT(27)
+#define PMC_PSS_BIT_DFX_CLSTR2 BIT(28)
+#define PMC_PSS_BIT_DFX_CLSTR3 BIT(29)
+#define PMC_PSS_BIT_DFX_CLSTR4 BIT(30)
+#define PMC_PSS_BIT_DFX_CLSTR5 BIT(31)
+
/* The timers acumulate time spent in sleep state */
#define PMC_S0IR_TMR 0x80
diff --git a/arch/x86/kernel/pmc_atom.c b/arch/x86/kernel/pmc_atom.c
index b435e7c..50dde36 100644
--- a/arch/x86/kernel/pmc_atom.c
+++ b/arch/x86/kernel/pmc_atom.c
@@ -45,7 +45,10 @@ struct pmc_bit_map {
};
static struct pmc_bit_map *dev_map;
+static struct pmc_bit_map *pss_map;
static int dev_num;
+static int pss_num;
+
static struct pmc_bit_map byt_dev_map[] = {
{"0 - LPSS1_F0_DMA", BIT_LPSS1_F0_DMA},
{"1 - LPSS1_F1_PWM1", BIT_LPSS1_F1_PWM1},
@@ -85,7 +88,7 @@ static struct pmc_bit_map byt_dev_map[] = {
{"35 - DFX", BIT_DFX_BYT},
};
-static const struct pmc_bit_map pss_map[] = {
+static struct pmc_bit_map pss_map_vlv[] = {
{"0 - GBE", PMC_PSS_BIT_GBE},
{"1 - SATA", PMC_PSS_BIT_SATA},
{"2 - HDA", PMC_PSS_BIT_HDA},
@@ -144,6 +147,28 @@ static struct pmc_bit_map cht_dev_map[] = {
{"34 - ISH", BIT_ISH_CHT, BIT_ISH_FD_CHT},
};
+static struct pmc_bit_map pss_map_cht[] = {
+ {"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 - UFS", PMC_PSS_BIT_UFS},
+ {"11 - UXD(xDCI)", PMC_PSS_BIT_UXD},
+ {"12 - UXD FD SX(xDCI)", PMC_PSS_BIT_UXD_FD},
+ {"15 - UX Engine(xHCI) ", PMC_PSS_BIT_UX_ENG},
+ {"16 - USB SUS ", PMC_PSS_BIT_USB_SUS_CHT},
+ {"17 - GMM", PMC_PSS_BIT_GMM},
+ {"18 - ISH", PMC_PSS_BIT_ISH},
+ {"26 - DFX Master", PMC_PSS_BIT_DFX_MASTER},
+ {"27 - DFX Cluster1", PMC_PSS_BIT_DFX_CLSTR1},
+ {"28 - DFX Cluster2", PMC_PSS_BIT_DFX_CLSTR2},
+ {"29 - DFX Cluster3", PMC_PSS_BIT_DFX_CLSTR3},
+ {"30 - DFX Cluster4", PMC_PSS_BIT_DFX_CLSTR4},
+ {"31 - DFX Cluster5", PMC_PSS_BIT_DFX_CLSTR5},
+};
+
static inline u32 pmc_reg_read(struct pmc_dev *pmc, int reg_offset)
{
return readl(pmc->regmap + reg_offset);
@@ -240,7 +265,7 @@ static int pmc_pss_state_show(struct seq_file *s, void *unused)
u32 pss = pmc_reg_read(pmc, PMC_PSS);
int pss_index;
- for (pss_index = 0; pss_index < ARRAY_SIZE(pss_map); pss_index++) {
+ for (pss_index = 0; pss_index < pss_num; pss_index++) {
seq_printf(s, "Island: %-32s\tState: %s\n",
pss_map[pss_index].name,
pss_map[pss_index].d3_sts_bit & pss ? "Off" : "On");
@@ -414,10 +439,14 @@ static int __init pmc_atom_init(void)
case PCI_DEVICE_ID_BYT_PMC:
dev_map = byt_dev_map;
dev_num = ARRAY_SIZE(byt_dev_map);
+ pss_map = pss_map_vlv;
+ pss_num = ARRAY_SIZE(pss_map_vlv);
break;
case PCI_DEVICE_ID_CHT_PMC:
dev_map = cht_dev_map;
dev_num = ARRAY_SIZE(cht_dev_map);
+ pss_map = pss_map_cht;
+ pss_num = ARRAY_SIZE(pss_map_cht);
break;
}
err = pmc_setup_dev(pdev);
--
1.7.9.5
--
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