On 15/06/12 14:37, Srinidhi Kasagar wrote:
On Fri, Jun 15, 2012 at 15:18:58 +0200, Lee Jones wrote:
On 15/06/12 14:05, Srinidhi Kasagar wrote:
On Fri, Jun 15, 2012 at 14:45:11 +0200, Lee Jones wrote:
On 15/06/12 12:50, Srinidhi Kasagar wrote:
[...]
From: Lee Jones<lee.jones@xxxxxxxxxx>
Date: Tue, 17 Apr 2012 16:04:13 +0100
Subject: [PATCH 1/1] i2c: Add Device Tree support to the Nomadik I2C driver
Here we apply the bindings required for successful Device Tree
probing of the i2c-nomadik driver. We also apply a fall-back
configuration in case either one is not provided, or a required
element is missing from the one supplied.
Cc: linux-i2c@xxxxxxxxxxxxxxx
Signed-off-by: Lee Jones<lee.jones@xxxxxxxxxx>
---
drivers/i2c/busses/i2c-nomadik.c | 82 +++++++++++++++++++++++++++++++++++++-
1 file changed, 80 insertions(+), 2 deletions(-)
diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c
index a92440d..58e8114 100644
--- a/drivers/i2c/busses/i2c-nomadik.c
+++ b/drivers/i2c/busses/i2c-nomadik.c
@@ -23,6 +23,7 @@
#include<linux/io.h>
#include<linux/regulator/consumer.h>
#include<linux/pm_runtime.h>
+#include<linux/of.h>
#include<plat/i2c.h>
@@ -899,15 +900,86 @@ static const struct i2c_algorithm nmk_i2c_algo = {
.functionality = nmk_i2c_functionality
};
+static struct nmk_i2c_controller u8500_i2c = {
+ /*
+ * Slave data setup time; 250ns, 100ns, and 10ns, which
+ * is 14, 6 and 2 respectively for a 48Mhz i2c clock.
+ */
+ .slsu = 0xe,
And BTW, I forgot to mention: This slsu stuff is not needed at all.
It is required only in case of slave mode operation, which the
driver does not support. You can perhaps consider deprecating
this parameter from device tree list as well as from platform data.
Thanks. I will add it to my TODO list for a latter patch-set.
+ .tft = 1, /* Tx FIFO threshold */
+ .rft = 8, /* Rx FIFO threshold */
+ .clk_freq = 100000, /* std. mode operation */
+ .timeout = 200, /* Slave response timeout(ms) */
+ .sm = I2C_FREQ_MODE_FAST,
How is this possible? you are setting clk_freq as 100kb/s and mode
as fast mode which is supposed to be 400kb/s.
That's not how I read it:
But it is not readable. It confuses people.
I understood it. :)
If you think it's unclear speak to the author, Linus. He's CC'ed.
It is!
/srinidhi
--
Lee Jones
Linaro ST-Ericsson Landing Team Lead
M: +44 77 88 633 515
Linaro.org │ Open source software for ARM SoCs
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