mfd: db8500-prcmu: update resource passing

When trying to get rid of the cross-includes of <mach/id.h>
from different drivers, so we can localize ASIC/CPU detection
to the mach-ux500 folder, we run into the way the PRCMU
handles base addresses and firmware detection.

This patch updates the firmware version detection to pass
the required information as platform data instead of
relying on cpu_is_* macros.

Now the PRCMU base address, the secondary TCDM area, the
TCPM area and the IRQ are passed as resources instead of
being grabbed from <mach/*> files. Incidentally this also
removes part of the reliance on <mach/irqs.h>.

Further it updates the firmware version detection, since the
location of the firmware ID bytes in the designated memory
are is now passed from the platform data instead. There is
no reason not to include the nice split-off of a struct to
hold the firmware information and a separate function to
populate it.

The patch actually rids the need to use the external
db8500_prcmu_early_init call at all, but I'm keepin back
that removal as I don't want the patch to be too big.

Cc: arm@kernel.org
Cc: Michel Jaoen <michel.jaouen@stericsson.com>
Cc: Lee Jones <lee.jones@linaro.org>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Acked-by: Loic Pallardy <loic.pallardy@stericsson.com>
Acked-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 46 insertions, 0 deletions

diff --git a/include/linux/mfd/dbx500-prcmu.h b/include/linux/mfd/dbx500-prcmu.h
index 15528064258..f8bac7cfc25 100644
--- a/include/linux/mfd/dbx500-prcmu.h
+++ b/include/linux/mfd/dbx500-prcmu.h
@@ -12,6 +12,10 @@
 #include <linux/notifier.h>
 #include <linux/err.h>
 
+/* Offset for the firmware version within the TCPM */
+#define DB8500_PRCMU_FW_VERSION_OFFSET 0xA4
+#define DBX540_PRCMU_FW_VERSION_OFFSET 0xA8
+
 /* PRCMU Wakeup defines */
 enum prcmu_wakeup_index {
 	PRCMU_WAKEUP_INDEX_RTC,
@@ -214,6 +218,48 @@ enum ddr_pwrst {
 	DDR_PWR_STATE_OFFHIGHLAT    = 0x03
 };
 
+#define DB8500_PRCMU_LEGACY_OFFSET		0xDD4
+
+struct prcmu_pdata
+{
+	bool enable_set_ddr_opp;
+	bool enable_ape_opp_100_voltage;
+	struct ab8500_platform_data *ab_platdata;
+	u32 version_offset;
+	u32 legacy_offset;
+	u32 adt_offset;
+};
+
+#define PRCMU_FW_PROJECT_U8500		2
+#define PRCMU_FW_PROJECT_U8400		3
+#define PRCMU_FW_PROJECT_U9500		4 /* Customer specific */
+#define PRCMU_FW_PROJECT_U8500_MBB	5
+#define PRCMU_FW_PROJECT_U8500_C1	6
+#define PRCMU_FW_PROJECT_U8500_C2	7
+#define PRCMU_FW_PROJECT_U8500_C3	8
+#define PRCMU_FW_PROJECT_U8500_C4	9
+#define PRCMU_FW_PROJECT_U9500_MBL	10
+#define PRCMU_FW_PROJECT_U8500_MBL	11 /* Customer specific */
+#define PRCMU_FW_PROJECT_U8500_MBL2	12 /* Customer specific */
+#define PRCMU_FW_PROJECT_U8520		13
+#define PRCMU_FW_PROJECT_U8420		14
+#define PRCMU_FW_PROJECT_A9420		20
+/* [32..63] 9540 and derivatives */
+#define PRCMU_FW_PROJECT_U9540		32
+/* [64..95] 8540 and derivatives */
+#define PRCMU_FW_PROJECT_L8540		64
+/* [96..126] 8580 and derivatives */
+#define PRCMU_FW_PROJECT_L8580		96
+
+#define PRCMU_FW_PROJECT_NAME_LEN	20
+struct prcmu_fw_version {
+	u32 project; /* Notice, project shifted with 8 on ux540 */
+	u8 api_version;
+	u8 func_version;
+	u8 errata;
+	char project_name[PRCMU_FW_PROJECT_NAME_LEN];
+};
+
 #include <linux/mfd/db8500-prcmu.h>
 
 #if defined(CONFIG_UX500_SOC_DB8500)