[PATCH 06/10] dtoc: extend dtoc to use struct driver_info when linking nodes
Walter Lozano
walter.lozano at collabora.com
Fri May 29 20:15:17 CEST 2020
In the current implementation, when dtoc parses a dtb to generate a struct
platdata it converts the information related to linked nodes as pointers
to struct platdata of destination nodes. By doing this, it makes
difficult to get pointer to udevices created based on these
information.
This patch extends dtoc to use struct driver_info when populating
information about linked nodes, which makes it easier to later get
the devices created. In this context, reimplement functions like
clk_get_by_index_platdata() which made use of the previous approach.
Signed-off-by: Walter Lozano <walter.lozano at collabora.com>
---
drivers/clk/clk-uclass.c | 11 +++++------
drivers/misc/irq-uclass.c | 10 ++++------
drivers/mmc/ftsdc010_mci.c | 2 +-
drivers/mmc/rockchip_dw_mmc.c | 2 +-
drivers/mmc/rockchip_sdhci.c | 2 +-
drivers/ram/rockchip/sdram_rk3399.c | 2 +-
drivers/spi/rk_spi.c | 2 +-
include/clk.h | 4 ++--
tools/dtoc/dtb_platdata.py | 24 +++++++++++++++++++++---
9 files changed, 37 insertions(+), 22 deletions(-)
diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c
index 71878474eb..412f26cd29 100644
--- a/drivers/clk/clk-uclass.c
+++ b/drivers/clk/clk-uclass.c
@@ -25,17 +25,16 @@ static inline const struct clk_ops *clk_dev_ops(struct udevice *dev)
#if CONFIG_IS_ENABLED(OF_CONTROL)
# if CONFIG_IS_ENABLED(OF_PLATDATA)
-int clk_get_by_index_platdata(struct udevice *dev, int index,
- struct phandle_1_arg *cells, struct clk *clk)
+int clk_get_by_driver_info(struct udevice *dev, struct phandle_1_arg *cells,
+ struct clk *clk)
{
int ret;
- if (index != 0)
- return -ENOSYS;
- ret = uclass_get_device(UCLASS_CLK, 0, &clk->dev);
+ ret = device_get_by_driver_info((struct driver_info *)cells->node,
+ &clk->dev);
if (ret)
return ret;
- clk->id = cells[0].arg[0];
+ clk->id = cells->arg[0];
return 0;
}
diff --git a/drivers/misc/irq-uclass.c b/drivers/misc/irq-uclass.c
index 61aa10e465..3c38681108 100644
--- a/drivers/misc/irq-uclass.c
+++ b/drivers/misc/irq-uclass.c
@@ -63,17 +63,15 @@ int irq_read_and_clear(struct irq *irq)
}
#if CONFIG_IS_ENABLED(OF_PLATDATA)
-int irq_get_by_index_platdata(struct udevice *dev, int index,
- struct phandle_1_arg *cells, struct irq *irq)
+int irq_get_by_driver_info(struct udevice *dev,
+ struct phandle_1_arg *cells, struct irq *irq)
{
int ret;
- if (index != 0)
- return -ENOSYS;
- ret = uclass_get_device(UCLASS_IRQ, 0, &irq->dev);
+ ret = device_get_by_driver_info(cells->node, &irq->dev);
if (ret)
return ret;
- irq->id = cells[0].arg[0];
+ irq->id = cells->arg[0];
return 0;
}
diff --git a/drivers/mmc/ftsdc010_mci.c b/drivers/mmc/ftsdc010_mci.c
index 9c15eb36d6..efa92d48be 100644
--- a/drivers/mmc/ftsdc010_mci.c
+++ b/drivers/mmc/ftsdc010_mci.c
@@ -437,7 +437,7 @@ static int ftsdc010_mmc_probe(struct udevice *dev)
chip->priv = dev;
chip->dev_index = 1;
memcpy(priv->minmax, dtplat->clock_freq_min_max, sizeof(priv->minmax));
- ret = clk_get_by_index_platdata(dev, 0, dtplat->clocks, &priv->clk);
+ ret = clk_get_by_driver_info(dev, dtplat->clocks, &priv->clk);
if (ret < 0)
return ret;
#endif
diff --git a/drivers/mmc/rockchip_dw_mmc.c b/drivers/mmc/rockchip_dw_mmc.c
index a0e1be8794..7b4479543c 100644
--- a/drivers/mmc/rockchip_dw_mmc.c
+++ b/drivers/mmc/rockchip_dw_mmc.c
@@ -120,7 +120,7 @@ static int rockchip_dwmmc_probe(struct udevice *dev)
priv->minmax[0] = 400000; /* 400 kHz */
priv->minmax[1] = dtplat->max_frequency;
- ret = clk_get_by_index_platdata(dev, 0, dtplat->clocks, &priv->clk);
+ ret = clk_get_by_driver_info(dev, dtplat->clocks, &priv->clk);
if (ret < 0)
return ret;
#else
diff --git a/drivers/mmc/rockchip_sdhci.c b/drivers/mmc/rockchip_sdhci.c
index b440996b26..b073f1a08d 100644
--- a/drivers/mmc/rockchip_sdhci.c
+++ b/drivers/mmc/rockchip_sdhci.c
@@ -46,7 +46,7 @@ static int arasan_sdhci_probe(struct udevice *dev)
host->name = dev->name;
host->ioaddr = map_sysmem(dtplat->reg[0], dtplat->reg[1]);
max_frequency = dtplat->max_frequency;
- ret = clk_get_by_index_platdata(dev, 0, dtplat->clocks, &clk);
+ ret = clk_get_by_driver_info(dev, dtplat->clocks, &clk);
#else
max_frequency = dev_read_u32_default(dev, "max-frequency", 0);
ret = clk_get_by_index(dev, 0, &clk);
diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c
index d69ef01d08..87ec25f893 100644
--- a/drivers/ram/rockchip/sdram_rk3399.c
+++ b/drivers/ram/rockchip/sdram_rk3399.c
@@ -3125,7 +3125,7 @@ static int rk3399_dmc_init(struct udevice *dev)
priv->cic, priv->pmugrf, priv->pmusgrf, priv->pmucru, priv->pmu);
#if CONFIG_IS_ENABLED(OF_PLATDATA)
- ret = clk_get_by_index_platdata(dev, 0, dtplat->clocks, &priv->ddr_clk);
+ ret = clk_get_by_driver_info(dev, dtplat->clocks, &priv->ddr_clk);
#else
ret = clk_get_by_index(dev, 0, &priv->ddr_clk);
#endif
diff --git a/drivers/spi/rk_spi.c b/drivers/spi/rk_spi.c
index 95eeb8307a..bd0337272e 100644
--- a/drivers/spi/rk_spi.c
+++ b/drivers/spi/rk_spi.c
@@ -181,7 +181,7 @@ static int conv_of_platdata(struct udevice *dev)
plat->base = dtplat->reg[0];
plat->frequency = 20000000;
- ret = clk_get_by_index_platdata(dev, 0, dtplat->clocks, &priv->clk);
+ ret = clk_get_by_driver_info(dev, dtplat->clocks, &priv->clk);
if (ret < 0)
return ret;
dev->req_seq = 0;
diff --git a/include/clk.h b/include/clk.h
index c6a2713f62..a62e2efa2c 100644
--- a/include/clk.h
+++ b/include/clk.h
@@ -89,8 +89,8 @@ struct clk_bulk {
#if CONFIG_IS_ENABLED(OF_CONTROL) && CONFIG_IS_ENABLED(CLK)
struct phandle_1_arg;
-int clk_get_by_index_platdata(struct udevice *dev, int index,
- struct phandle_1_arg *cells, struct clk *clk);
+int clk_get_by_driver_info(struct udevice *dev,
+ struct phandle_1_arg *cells, struct clk *clk);
/**
* clk_get_by_index - Get/request a clock by integer index.
diff --git a/tools/dtoc/dtb_platdata.py b/tools/dtoc/dtb_platdata.py
index 0a54188348..59b720703c 100644
--- a/tools/dtoc/dtb_platdata.py
+++ b/tools/dtoc/dtb_platdata.py
@@ -146,6 +146,7 @@ class DtbPlatdata(object):
_aliases: Dict that hold aliases for compatible strings
_drivers: List of valid driver names found in drivers/
_driver_aliases: Dict that holds aliases for driver names
+ _links: List of links to be included in populate_phandle_data
"""
def __init__(self, dtb_fname, include_disabled, warning_disable):
self._fdt = None
@@ -158,6 +159,7 @@ class DtbPlatdata(object):
self._aliases = {}
self._drivers = []
self._driver_aliases = {}
+ self._links = []
def get_normalized_compat_name(self, node):
"""Get a node's normalized compat name
@@ -540,7 +542,7 @@ class DtbPlatdata(object):
"""
struct_name, _ = self.get_normalized_compat_name(node)
var_name = conv_name_to_c(node.name)
- self.buf('static const struct %s%s %s%s = {\n' %
+ self.buf('static struct %s%s %s%s = {\n' %
(STRUCT_PREFIX, struct_name, VAL_PREFIX, var_name))
for pname in sorted(node.props):
prop = node.props[pname]
@@ -559,6 +561,7 @@ class DtbPlatdata(object):
if info:
# Process the list as pairs of (phandle, id)
pos = 0
+ item = 0
for args in info.args:
phandle_cell = prop.value[pos]
phandle = fdt_util.fdt32_to_cpu(phandle_cell)
@@ -568,8 +571,14 @@ class DtbPlatdata(object):
for i in range(args):
arg_values.append(str(fdt_util.fdt32_to_cpu(prop.value[pos + 1 + i])))
pos += 1 + args
- vals.append('\t{&%s%s, {%s}}' % (VAL_PREFIX, name,
- ', '.join(arg_values)))
+ # node member is filled with NULL as the real value
+ # will be update at run-time by populate_phandle_data()
+ vals.append('\t{NULL, {%s}}' % (', '.join(arg_values)))
+ var_node = '%s%s.%s[%d].node' % (VAL_PREFIX, var_name, member_name, item)
+ # Save the the link information to be use to define
+ # populate_phandle_data
+ self._links.append({'var_node': var_node, 'dev_name': name})
+ item += 1
for val in vals:
self.buf('\n\t\t%s,' % val)
else:
@@ -625,6 +634,15 @@ class DtbPlatdata(object):
self.output_node(node)
nodes_to_output.remove(node)
+ # Define populate_phandle_data which will add the linking between
+ # nodes using DM_GET_DEVICE
+ # dtv_dmc_at_xxx.clocks[0].node = DM_GET_DEVICE(clock_controller_at_xxx)
+ self.buf('void populate_phandle_data(void) {\n')
+ for l in self._links:
+ self.buf('\t%s = DM_GET_DEVICE(%s);\n' % (l['var_node'], l['dev_name']))
+ self.buf('}\n')
+
+ self.out(''.join(self.get_buf()))
def run_steps(args, dtb_file, include_disabled, output, warning_disable = False):
"""Run all the steps of the dtoc tool
--
2.20.1
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