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i2c: fsl: Add option to get clock from DT

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Add an option to get the clock speed from the device tree, hence adding
compatibility with DM clock drivers.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
This commit is contained in:
Mario Six
2018-03-28 14:37:44 +02:00
committed by Heiko Schocher
parent d934832de6
commit e5c762f5a7
1 changed files with 7 additions and 1 deletions
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8
drivers/i2c/fsl_i2c.c
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@@ -12,6 +12,7 @@
#include <i2c.h> /* Functional interface */ #include <i2c.h> /* Functional interface */
#include <asm/io.h> #include <asm/io.h>
#include <asm/fsl_i2c.h> /* HW definitions */ #include <asm/fsl_i2c.h> /* HW definitions */
#include <clk.h>
#include <dm.h> #include <dm.h>
#include <mapmem.h> #include <mapmem.h>
@@ -573,6 +574,7 @@ static int fsl_i2c_set_bus_speed(struct udevice *bus, uint speed)
static int fsl_i2c_ofdata_to_platdata(struct udevice *bus) static int fsl_i2c_ofdata_to_platdata(struct udevice *bus)
{ {
struct fsl_i2c_dev *dev = dev_get_priv(bus); struct fsl_i2c_dev *dev = dev_get_priv(bus);
struct clk clock;
dev->base = map_sysmem(dev_read_addr(bus), sizeof(struct fsl_i2c_base)); dev->base = map_sysmem(dev_read_addr(bus), sizeof(struct fsl_i2c_base));
@@ -584,7 +586,11 @@ static int fsl_i2c_ofdata_to_platdata(struct udevice *bus)
0x7f); 0x7f);
dev->speed = dev_read_u32_default(bus, "clock-frequency", 400000); dev->speed = dev_read_u32_default(bus, "clock-frequency", 400000);
dev->i2c_clk = dev->index ? gd->arch.i2c2_clk : gd->arch.i2c1_clk; if (!clk_get_by_index(bus, 0, &clock))
dev->i2c_clk = clk_get_rate(&clock);
else
dev->i2c_clk = dev->index ? gd->arch.i2c2_clk :
gd->arch.i2c1_clk;
return 0; return 0;
} }