We used to get the address of the optionnal ctrl_mod_mmap register as the third memory range of the "reg" property. the linux driver moved to use a syscon instead. In order to keep the DTS as close as possible to that of linux, we move to using a syscon as well.
If SYSCON is not supported, the driver reverts to the old way of getting the address from the 3rd memory range
Signed-off-by: Jean-Jacques Hiblot jjhiblot@ti.com --- drivers/spi/ti_qspi.c | 47 ++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 42 insertions(+), 5 deletions(-)
diff --git a/drivers/spi/ti_qspi.c b/drivers/spi/ti_qspi.c index 79955d7..3c4c9dd 100644 --- a/drivers/spi/ti_qspi.c +++ b/drivers/spi/ti_qspi.c @@ -17,6 +17,8 @@ #include <asm/omap_common.h> #include <asm/ti-common/ti-edma3.h> #include <linux/kernel.h> +#include <regmap.h> +#include <syscon.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -549,21 +551,56 @@ static int ti_qspi_probe(struct udevice *bus) return 0; }
+static void *map_syscon_chipselects(struct udevice *bus) +{ +#if CONFIG_IS_ENABLED(SYSCON) + struct udevice *syscon; + struct regmap *regmap; + const fdt32_t *cell; + int len, err; + + err = uclass_get_device_by_phandle(UCLASS_SYSCON, bus, + "syscon-chipselects", &syscon); + if (err) { + debug("%s: unable to find syscon device (%d)\n", __func__, + err); + return NULL; + } + + regmap = syscon_get_regmap(syscon); + if (IS_ERR(regmap)) { + debug("%s: unable to find regmap (%ld)\n", __func__, + PTR_ERR(regmap)); + return NULL; + } + + cell = fdt_getprop(gd->fdt_blob, bus->of_offset, "syscon-chipselects", + &len); + if (len < 2*sizeof(fdt32_t)) { + debug("%s: offset not available\n", __func__); + return NULL; + } + + return fdtdec_get_number(cell + 1, 1) + regmap_get_range(regmap, 0); +#else + fdt_addr_t addr; + addr = dev_get_addr_index(bus, 2); + return (addr == FDT_ADDR_T_NONE) ? NULL : + map_physmem(addr, 0, MAP_NOCACHE); +#endif +} + static int ti_qspi_ofdata_to_platdata(struct udevice *bus) { struct ti_qspi_priv *priv = dev_get_priv(bus); const void *blob = gd->fdt_blob; int node = dev_of_offset(bus); - fdt_addr_t addr; - void *mmap;
+ priv->ctrl_mod_mmap = map_syscon_chipselects(bus); priv->base = map_physmem(dev_get_addr(bus), sizeof(struct ti_qspi_regs), MAP_NOCACHE); priv->memory_map = map_physmem(dev_get_addr_index(bus, 1), 0, MAP_NOCACHE); - addr = dev_get_addr_index(bus, 2); - mmap = map_physmem(dev_get_addr_index(bus, 2), 0, MAP_NOCACHE); - priv->ctrl_mod_mmap = (addr == FDT_ADDR_T_NONE) ? NULL : mmap;
priv->max_hz = fdtdec_get_int(blob, node, "spi-max-frequency", -1); if (priv->max_hz < 0) {