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>

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[] = {