Newer IP's have wr_access and wr_data_mux_bus fields. Use
IP revision values to determine availability of these
fields and hence decide on whether to configure them.
Signed-off-by: Afzal Mohammed <afzal@xxxxxx>
---
arch/arm/mach-omap2/gpmc.c | 12 ++++++++++--
1 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index 070fac5..68123d0 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -85,6 +85,11 @@
#define ENABLE_PREFETCH (0x1 << 7)
#define DMA_MPU_MODE 2
+#define GPMC_REVISION_MAJOR(l) ((l >> 4) & 0xf)
+
+#define GPMC_HAS_WR_ACCESS 0x1
+#define GPMC_HAS_WR_DATA_MUX_BUS 0x2
+
/* XXX: Only NAND irq has been considered,currently these are the only ones used
*/
#define GPMC_NR_IRQ 2
@@ -131,6 +136,7 @@ static DEFINE_SPINLOCK(gpmc_mem_lock);
static unsigned int gpmc_cs_map; /* flag for cs which are initialized */
static int gpmc_ecc_used = -EINVAL; /* cs using ecc engine */
+static unsigned gpmc_capability;
static void __iomem *gpmc_base;
static struct clk *gpmc_l3_clk;
@@ -356,10 +362,10 @@ int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t)
GPMC_SET_ONE(GPMC_CS_CONFIG1, 18, 19, wait_monitoring);
GPMC_SET_ONE(GPMC_CS_CONFIG1, 25, 26, clk_activation);
- if (cpu_is_omap34xx()) {
+ if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS)
GPMC_SET_ONE(GPMC_CS_CONFIG6, 16, 19, wr_data_mux_bus);
+ if (gpmc_capability & GPMC_HAS_WR_ACCESS)
GPMC_SET_ONE(GPMC_CS_CONFIG6, 24, 28, wr_access);
- }
/* caller is expected to have initialized CONFIG1 to cover
* at least sync vs async
@@ -922,6 +928,8 @@ static int __init gpmc_init(void)
clk_enable(gpmc_l3_clk);
l = gpmc_read_reg(GPMC_REVISION);
+ if (GPMC_REVISION_MAJOR(l) > 0x4)
+ gpmc_capability = GPMC_HAS_WR_ACCESS | GPMC_HAS_WR_DATA_MUX_BUS;
printk(KERN_INFO "GPMC revision %d.%d\n", (l >> 4) & 0x0f, l & 0x0f);
/* Set smart idle mode and automatic L3 clock gating */
l = gpmc_read_reg(GPMC_SYSCONFIG);
--
1.7.1
--
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