diff options
| author | blogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2013-07-08 09:01:57 +0000 |
|---|---|---|
| committer | blogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2013-07-08 09:01:57 +0000 |
| commit | 91bf0a9f9d4b452b5cf597ff66898008f0fefd0e (patch) | |
| tree | 913eee4c23fd84f87742c7350f5e459c902c0c6f /target/linux | |
| parent | 3c640196ba89452d67e57553de352a2d3216c17b (diff) | |
ralink: unbreak ralink i2c support
Signed-off-by: John Crispin <blogic@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37202 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux')
| -rw-r--r-- | target/linux/ramips/patches-3.9/0153-i2c-MIPS-adds-ralink-I2C-driver.patch | 38 |
1 files changed, 23 insertions, 15 deletions
diff --git a/target/linux/ramips/patches-3.9/0153-i2c-MIPS-adds-ralink-I2C-driver.patch b/target/linux/ramips/patches-3.9/0153-i2c-MIPS-adds-ralink-I2C-driver.patch index 88d6ec9ef2..0daf217a93 100644 --- a/target/linux/ramips/patches-3.9/0153-i2c-MIPS-adds-ralink-I2C-driver.patch +++ b/target/linux/ramips/patches-3.9/0153-i2c-MIPS-adds-ralink-I2C-driver.patch @@ -13,8 +13,10 @@ Signed-off-by: John Crispin <blogic@openwrt.org> create mode 100644 Documentation/devicetree/bindings/i2c/i2c-ralink.txt create mode 100644 drivers/i2c/busses/i2c-ralink.c ---- /dev/null -+++ b/Documentation/devicetree/bindings/i2c/i2c-ralink.txt +Index: linux-3.9.8/Documentation/devicetree/bindings/i2c/i2c-ralink.txt +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-3.9.8/Documentation/devicetree/bindings/i2c/i2c-ralink.txt 2013-07-02 11:36:42.944155612 +0200 @@ -0,0 +1,27 @@ +I2C for Ralink platforms + @@ -43,9 +45,11 @@ Signed-off-by: John Crispin <blogic@openwrt.org> + }; + }; +}; ---- a/drivers/i2c/busses/Kconfig -+++ b/drivers/i2c/busses/Kconfig -@@ -628,6 +628,10 @@ config I2C_PXA_SLAVE +Index: linux-3.9.8/drivers/i2c/busses/Kconfig +=================================================================== +--- linux-3.9.8.orig/drivers/i2c/busses/Kconfig 2013-06-27 19:41:32.000000000 +0200 ++++ linux-3.9.8/drivers/i2c/busses/Kconfig 2013-07-02 11:36:42.944155612 +0200 +@@ -628,6 +628,10 @@ is necessary for systems where the PXA may be a target on the I2C bus. @@ -56,9 +60,11 @@ Signed-off-by: John Crispin <blogic@openwrt.org> config HAVE_S3C2410_I2C bool help ---- a/drivers/i2c/busses/Makefile -+++ b/drivers/i2c/busses/Makefile -@@ -62,6 +62,7 @@ obj-$(CONFIG_I2C_PNX) += i2c-pnx.o +Index: linux-3.9.8/drivers/i2c/busses/Makefile +=================================================================== +--- linux-3.9.8.orig/drivers/i2c/busses/Makefile 2013-06-27 19:41:32.000000000 +0200 ++++ linux-3.9.8/drivers/i2c/busses/Makefile 2013-07-02 11:36:42.944155612 +0200 +@@ -62,6 +62,7 @@ obj-$(CONFIG_I2C_PUV3) += i2c-puv3.o obj-$(CONFIG_I2C_PXA) += i2c-pxa.o obj-$(CONFIG_I2C_PXA_PCI) += i2c-pxa-pci.o @@ -66,8 +72,10 @@ Signed-off-by: John Crispin <blogic@openwrt.org> obj-$(CONFIG_I2C_S3C2410) += i2c-s3c2410.o obj-$(CONFIG_I2C_S6000) += i2c-s6000.o obj-$(CONFIG_I2C_SH7760) += i2c-sh7760.o ---- /dev/null -+++ b/drivers/i2c/busses/i2c-ralink.c +Index: linux-3.9.8/drivers/i2c/busses/i2c-ralink.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-3.9.8/drivers/i2c/busses/i2c-ralink.c 2013-07-08 10:56:00.068287905 +0200 @@ -0,0 +1,274 @@ +/* + * drivers/i2c/busses/i2c-ralink.c @@ -122,7 +130,8 @@ Signed-off-by: John Crispin <blogic@openwrt.org> + +#define I2C_RETRY 0x400 + -+#define CLKDIV_VALUE 600 ++#define CLKDIV_VALUE 200 // clock rate is 40M, 40M / (200*2) = 100k (standard i2c bus rate). ++//#define CLKDIV_VALUE 50 // clock rate is 40M, 40M / (50*2) = 400k (fast i2c bus rate). + +#define READ_CMD 0x01 +#define WRITE_CMD 0x00 @@ -211,16 +220,15 @@ Signed-off-by: John Crispin <blogic@openwrt.org> + } else { + rt_i2c_wait_idle(); + rt_i2c_w32(msg->len - 1, REG_BYTECNT_REG); -+ rt_i2c_w32(msg->buf[0], REG_DATAOUT_REG); -+ rt_i2c_w32(WRITE_CMD, REG_STARTXFR_REG); -+ for (i = 1; i < msg->len; i++) { ++ for (i = 0; i < msg->len; i++) { + rt_i2c_w32(msg->buf[i], REG_DATAOUT_REG); ++ rt_i2c_w32(WRITE_CMD, REG_STARTXFR_REG); + if (rt_i2c_wait_tx_done()) + return -1; + } + } + -+ return msg->len; ++ return 0; +} + +static int rt_i2c_master_xfer(struct i2c_adapter *a, struct i2c_msg *m, int n) |