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Date: Fri, 13 Jan 2012 16:20:10 +0100
From: Linus Walleij <linus.walleij@...ricsson.com>
To: Samuel Ortiz <sameo@...ux.intel.com>,
<linux-kernel@...r.kernel.org>
Cc: Mattias Nilsson <mattias.i.nilsson@...ricsson.com>,
Bengt Jonsson <bengt.g.jonsson@...ricsson.com>,
Daniel Willerud <daniel.willerud@...ricsson.com>,
Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH 2/8] mfd/db8500-prcmu: function for obtaining the prcmu firmware version
From: Mattias Nilsson <mattias.i.nilsson@...ricsson.com>
This patch exports a function that can be used to tell which
version of the DB8500 PRCMU firmware is available, and revamps the
firmware detection code a bit.
Reviewed-by: Bengt Jonsson <bengt.g.jonsson@...ricsson.com>
Reviewed-by: Jonas Aberg <jonas.aberg@...ricsson.com>
Signed-off-by: Mattias Nilsson <mattias.i.nilsson@...ricsson.com>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
drivers/mfd/db8500-prcmu.c | 51 ++++++++++++++++++++++++-------------
include/linux/mfd/db8500-prcmu.h | 18 +++++++++++++
2 files changed, 51 insertions(+), 18 deletions(-)
diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
index b911963..1251993 100644
--- a/drivers/mfd/db8500-prcmu.c
+++ b/drivers/mfd/db8500-prcmu.c
@@ -39,11 +39,6 @@
/* Offset for the firmware version within the TCPM */
#define PRCMU_FW_VERSION_OFFSET 0xA4
-/* PRCMU project numbers, defined by PRCMU FW */
-#define PRCMU_PROJECT_ID_8500V1_0 1
-#define PRCMU_PROJECT_ID_8500V2_0 2
-#define PRCMU_PROJECT_ID_8400V2_0 3
-
/* Index of different voltages to be used when accessing AVSData */
#define PRCM_AVS_BASE 0x2FC
#define PRCM_AVS_VBB_RET (PRCM_AVS_BASE + 0x0)
@@ -266,6 +261,11 @@
#define WAKEUP_BIT_GPIO7 BIT(30)
#define WAKEUP_BIT_GPIO8 BIT(31)
+static struct {
+ bool valid;
+ struct prcmu_fw_version version;
+} fw_info;
+
/*
* This vector maps irq numbers to the bits in the bit field used in
* communication with the PRCMU firmware.
@@ -522,14 +522,6 @@ static const char *hwacc_ret_regulator_name[NUM_HW_ACC] = {
#define PRCMU_PLLDSI_LOCKP_LOCKED 0x3
-static struct {
- u8 project_number;
- u8 api_version;
- u8 func_version;
- u8 errata;
-} prcmu_version;
-
-
int db8500_prcmu_enable_dsipll(void)
{
int i;
@@ -619,6 +611,11 @@ void prcmu_disable_spi2(void)
spin_unlock_irqrestore(&gpiocr_lock, flags);
}
+struct prcmu_fw_version *prcmu_get_fw_version(void)
+{
+ return fw_info.valid ? &fw_info.version : NULL;
+}
+
bool prcmu_has_arm_maxopp(void)
{
return (readb(tcdm_base + PRCM_AVS_VARM_MAX_OPP) &
@@ -2077,6 +2074,22 @@ static struct irq_chip prcmu_irq_chip = {
.irq_unmask = prcmu_irq_unmask,
};
+static char *fw_project_name(u8 project)
+{
+ switch (project) {
+ case PRCMU_FW_PROJECT_U8500:
+ return "U8500";
+ case PRCMU_FW_PROJECT_U8500_C2:
+ return "U8500 C2";
+ case PRCMU_FW_PROJECT_U9500:
+ return "U9500";
+ case PRCMU_FW_PROJECT_U9500_C2:
+ return "U9500 C2";
+ default:
+ return "Unknown";
+ }
+}
+
void __init db8500_prcmu_early_init(void)
{
unsigned int i;
@@ -2086,11 +2099,13 @@ void __init db8500_prcmu_early_init(void)
if (tcpm_base != NULL) {
u32 version;
version = readl(tcpm_base + PRCMU_FW_VERSION_OFFSET);
- prcmu_version.project_number = version & 0xFF;
- prcmu_version.api_version = (version >> 8) & 0xFF;
- prcmu_version.func_version = (version >> 16) & 0xFF;
- prcmu_version.errata = (version >> 24) & 0xFF;
- pr_info("PRCMU firmware version %d.%d.%d\n",
+ fw_info.version.project = version & 0xFF;
+ fw_info.version.api_version = (version >> 8) & 0xFF;
+ fw_info.version.func_version = (version >> 16) & 0xFF;
+ fw_info.version.errata = (version >> 24) & 0xFF;
+ fw_info.valid = true;
+ pr_info("PRCMU firmware: %s, version %d.%d.%d\n",
+ fw_project_name(fw_info.version.project),
(version >> 8) & 0xFF, (version >> 16) & 0xFF,
(version >> 24) & 0xFF);
iounmap(tcpm_base);
diff --git a/include/linux/mfd/db8500-prcmu.h b/include/linux/mfd/db8500-prcmu.h
index 0dc9017..1895917 100644
--- a/include/linux/mfd/db8500-prcmu.h
+++ b/include/linux/mfd/db8500-prcmu.h
@@ -493,6 +493,18 @@ struct prcmu_auto_pm_config {
u8 sva_policy;
};
+#define PRCMU_FW_PROJECT_U8500 2
+#define PRCMU_FW_PROJECT_U9500 4
+#define PRCMU_FW_PROJECT_U8500_C2 7
+#define PRCMU_FW_PROJECT_U9500_C2 11
+
+struct prcmu_fw_version {
+ u8 project;
+ u8 api_version;
+ u8 func_version;
+ u8 errata;
+};
+
#ifdef CONFIG_MFD_DB8500_PRCMU
void db8500_prcmu_early_init(void);
@@ -502,6 +514,7 @@ enum ap_pwrst prcmu_get_xp70_current_state(void);
bool prcmu_has_arm_maxopp(void);
int prcmu_set_ape_opp(u8 opp);
int prcmu_get_ape_opp(void);
+struct prcmu_fw_version *prcmu_get_fw_version(void);
int prcmu_request_ape_opp_100_voltage(bool enable);
int prcmu_release_usb_wakeup_state(void);
int prcmu_set_ddr_opp(u8 opp);
@@ -573,6 +586,11 @@ static inline bool prcmu_has_arm_maxopp(void)
return false;
}
+static inline struct prcmu_fw_version *prcmu_get_fw_version(void)
+{
+ return NULL;
+}
+
static inline int prcmu_set_ape_opp(u8 opp)
{
return 0;
--
1.7.8
--
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