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phy: marvell: mux: Support nontrivial node order in selector register

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Currently comphy_mux supports only trivial order of nodes in pin
selector register, that is lane N on position N*bitcount.

Add support for nontrivial order, with map stored in device tree
property mux-lane-order.

This is needed for Armada 37xx.

As far as I know, there is no driver for Armada 37xx comphy in the
kernel. When such a driver comes, this will need to be rewritten to
support the device tree bindings from the kernel.

Signed-off-by: Marek Behun <marek.behun@nic.cz>
Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Marek Behún 2018-04-24 17:21:21 +02:00 committed by Stefan Roese
parent 7d7f22fbd3
commit 7586ac2b49
3 changed files with 19 additions and 3 deletions
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1
drivers/phy/marvell/comphy.h
View file

@ -96,6 +96,7 @@ struct chip_serdes_phy_config {
void __iomem *hpipe3_base_addr;
u32 comphy_lanes_count;
u32 comphy_mux_bitcount;
const fdt32_t *comphy_mux_lane_order;
u32 cp_index;
};

4
drivers/phy/marvell/comphy_core.c
View file

@ -134,6 +134,10 @@ static int comphy_probe(struct udevice *dev)
return -EINVAL;
}
chip_cfg->comphy_mux_lane_order =
fdtdec_locate_array(blob, node, "mux-lane-order",
chip_cfg->comphy_lanes_count);
if (device_is_compatible(dev, "marvell,comphy-armada-3700"))
chip_cfg->ptr_comphy_chip_init = comphy_a3700_init;

17
drivers/phy/marvell/comphy_mux.c
View file

@ -78,7 +78,8 @@ static u32 comphy_mux_get_mux_value(struct comphy_mux_data *mux_data,
static void comphy_mux_reg_write(struct comphy_mux_data *mux_data,
struct comphy_map *comphy_map_data,
int comphy_max_lanes,
void __iomem *selector_base, u32 bitcount)
void __iomem *selector_base,
const fdt32_t *mux_lane_order, u32 bitcount)
{
u32 lane, value, offset, mask;
@ -89,7 +90,15 @@ static void comphy_mux_reg_write(struct comphy_mux_data *mux_data,
if (comphy_map_data->type == PHY_TYPE_IGNORE)
continue;
offset = lane * bitcount;
/*
* if the order of nodes in selector base register is
* nontrivial, use mapping from mux_lane_order
*/
if (mux_lane_order)
offset = fdt32_to_cpu(mux_lane_order[lane]) * bitcount;
else
offset = lane * bitcount;
mask = (((1 << bitcount) - 1) << offset);
value = (comphy_mux_get_mux_value(mux_data,
comphy_map_data->type,
@ -105,6 +114,7 @@ void comphy_mux_init(struct chip_serdes_phy_config *chip_cfg,
void __iomem *selector_base)
{
struct comphy_mux_data *mux_data;
const fdt32_t *mux_lane_order;
u32 mux_bitcount;
u32 comphy_max_lanes;
@ -112,13 +122,14 @@ void comphy_mux_init(struct chip_serdes_phy_config *chip_cfg,
comphy_max_lanes = chip_cfg->comphy_lanes_count;
mux_data = chip_cfg->mux_data;
mux_lane_order = chip_cfg->comphy_mux_lane_order;
mux_bitcount = chip_cfg->comphy_mux_bitcount;
/* check if the configuration is valid */
comphy_mux_check_config(mux_data, comphy_map_data, comphy_max_lanes);
/* Init COMPHY selectors */
comphy_mux_reg_write(mux_data, comphy_map_data, comphy_max_lanes,
selector_base, mux_bitcount);
selector_base, mux_lane_order, mux_bitcount);
debug_exit();
}