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authorGeert Uytterhoeven <geert+renesas@glider.be>2014-11-06 12:52:06 +0100
committerSimon Horman <horms+renesas@verge.net.au>2014-11-12 10:38:30 +0900
commitb207422bb92f17f4f892a9b8737d44b37fece25b (patch)
tree5e75ca6d86f7dbc590a1037de31964e6470169b3
parentf114040e3ea6e07372334ade75d1ee0775c355e1 (diff)
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ARM: shmobile: kzm9g legacy: Set i2c clks_per_count to 2
On sh73a0/kzm9g-legacy, probing of the i2c masters fails with: i2c-sh_mobile i2c-sh_mobile.0: timing values out of range: L/H=0x208/0x1bf sh_mobile: probe of i2c-sh_mobile.0 failed with error -22 According to the datasheet, the transfer rate is derived from the HP clock (which runs at 104 MHz) divided by two. Hence i2c_sh_mobile_platform_data.clks_per_count should be set to two. Now probing succeeds, and i2c works: i2c-sh_mobile i2c-sh_mobile.0: I2C adapter 0 with bus speed 100000 Hz (L/H=0x104/0xe0) Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
-rw-r--r--arch/arm/mach-shmobile/setup-sh73a0.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/setup-sh73a0.c b/arch/arm/mach-shmobile/setup-sh73a0.c
index b7bd8e509668..328657d011d5 100644
--- a/arch/arm/mach-shmobile/setup-sh73a0.c
+++ b/arch/arm/mach-shmobile/setup-sh73a0.c
@@ -26,6 +26,7 @@
#include <linux/of_platform.h>
#include <linux/delay.h>
#include <linux/input.h>
+#include <linux/i2c/i2c-sh_mobile.h>
#include <linux/io.h>
#include <linux/serial_sci.h>
#include <linux/sh_dma.h>
@@ -192,11 +193,18 @@ static struct resource i2c4_resources[] = {
},
};
+static struct i2c_sh_mobile_platform_data i2c_platform_data = {
+ .clks_per_count = 2,
+};
+
static struct platform_device i2c0_device = {
.name = "i2c-sh_mobile",
.id = 0,
.resource = i2c0_resources,
.num_resources = ARRAY_SIZE(i2c0_resources),
+ .dev = {
+ .platform_data = &i2c_platform_data,
+ },
};
static struct platform_device i2c1_device = {
@@ -204,6 +212,9 @@ static struct platform_device i2c1_device = {
.id = 1,
.resource = i2c1_resources,
.num_resources = ARRAY_SIZE(i2c1_resources),
+ .dev = {
+ .platform_data = &i2c_platform_data,
+ },
};
static struct platform_device i2c2_device = {
@@ -211,6 +222,9 @@ static struct platform_device i2c2_device = {
.id = 2,
.resource = i2c2_resources,
.num_resources = ARRAY_SIZE(i2c2_resources),
+ .dev = {
+ .platform_data = &i2c_platform_data,
+ },
};
static struct platform_device i2c3_device = {
@@ -218,6 +232,9 @@ static struct platform_device i2c3_device = {
.id = 3,
.resource = i2c3_resources,
.num_resources = ARRAY_SIZE(i2c3_resources),
+ .dev = {
+ .platform_data = &i2c_platform_data,
+ },
};
static struct platform_device i2c4_device = {
@@ -225,6 +242,9 @@ static struct platform_device i2c4_device = {
.id = 4,
.resource = i2c4_resources,
.num_resources = ARRAY_SIZE(i2c4_resources),
+ .dev = {
+ .platform_data = &i2c_platform_data,
+ },
};
static const struct sh_dmae_slave_config sh73a0_dmae_slaves[] = {