diff options
| author | Neelesh Gupta <neelegup@linux.vnet.ibm.com> | 2014-12-13 23:31:05 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2014-12-14 12:44:46 +1100 |
| commit | 470834508f87877f680738a10a305280582c7aed (patch) | |
| tree | 62cf343202cd77e25285d164bad5c5f6c0bc4877 /arch/powerpc/platforms | |
| parent | 63f13448d81c910a284b096149411a719cbed501 (diff) | |
| download | op-kernel-dev-470834508f87877f680738a10a305280582c7aed.zip op-kernel-dev-470834508f87877f680738a10a305280582c7aed.tar.gz | |
i2c: Driver to expose PowerNV platform i2c busses
The patch exposes the available i2c busses on the PowerNV platform
to the kernel and implements the bus driver to support i2c and
smbus commands.
The driver uses the platform device infrastructure to probe the busses
on the platform and registers them with the i2c driver framework.
Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Wolfram Sang <wsa@the-dreams.de> (I2C part, excluding the bindings)
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/platforms')
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal-wrappers.S | 1 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal.c | 12 |
2 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S index 0a299be..2111e08 100644 --- a/arch/powerpc/platforms/powernv/opal-wrappers.S +++ b/arch/powerpc/platforms/powernv/opal-wrappers.S @@ -254,3 +254,4 @@ OPAL_CALL(opal_tpo_write, OPAL_WRITE_TPO); OPAL_CALL(opal_tpo_read, OPAL_READ_TPO); OPAL_CALL(opal_ipmi_send, OPAL_IPMI_SEND); OPAL_CALL(opal_ipmi_recv, OPAL_IPMI_RECV); +OPAL_CALL(opal_i2c_request, OPAL_I2C_REQUEST); diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c index cb0b6de..aa316d8 100644 --- a/arch/powerpc/platforms/powernv/opal.c +++ b/arch/powerpc/platforms/powernv/opal.c @@ -653,6 +653,14 @@ static void opal_ipmi_init(struct device_node *opal_node) of_platform_device_create(np, NULL, NULL); } +static void opal_i2c_create_devs(void) +{ + struct device_node *np; + + for_each_compatible_node(np, NULL, "ibm,opal-i2c") + of_platform_device_create(np, NULL, NULL); +} + static int __init opal_init(void) { struct device_node *np, *consoles; @@ -679,6 +687,9 @@ static int __init opal_init(void) of_node_put(consoles); } + /* Create i2c platform devices */ + opal_i2c_create_devs(); + /* Find all OPAL interrupts and request them */ irqs = of_get_property(opal_node, "opal-interrupts", &irqlen); pr_debug("opal: Found %d interrupts reserved for OPAL\n", @@ -824,3 +835,4 @@ EXPORT_SYMBOL_GPL(opal_rtc_read); EXPORT_SYMBOL_GPL(opal_rtc_write); EXPORT_SYMBOL_GPL(opal_tpo_read); EXPORT_SYMBOL_GPL(opal_tpo_write); +EXPORT_SYMBOL_GPL(opal_i2c_request); |
