mfd: Function for obtaining the db8500 prcmu firmware version

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@stericsson.com>
Reviewed-by: Jonas Aberg <jonas.aberg@stericsson.com>
Signed-off-by: Mattias Nilsson <mattias.i.nilsson@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/include/linux/mfd/db8500-prcmu.h b/include/linux/mfd/db8500-prcmu.h
index 0dc9017272b..18959171f44 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;