diff options
Diffstat (limited to 'meta-rcar-gen2/recipes-kernel/linux/linux-renesas/0019-i2c-busses-rcar-Workaround-arbitration-loss-error.patch')
| -rw-r--r-- | meta-rcar-gen2/recipes-kernel/linux/linux-renesas/0019-i2c-busses-rcar-Workaround-arbitration-loss-error.patch | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/meta-rcar-gen2/recipes-kernel/linux/linux-renesas/0019-i2c-busses-rcar-Workaround-arbitration-loss-error.patch b/meta-rcar-gen2/recipes-kernel/linux/linux-renesas/0019-i2c-busses-rcar-Workaround-arbitration-loss-error.patch new file mode 100644 index 0000000..209d1b4 --- /dev/null +++ b/meta-rcar-gen2/recipes-kernel/linux/linux-renesas/0019-i2c-busses-rcar-Workaround-arbitration-loss-error.patch @@ -0,0 +1,31 @@ +From 23fa8d125ca1be9c03ac7d2f42530a57d6ca28f2 Mon Sep 17 00:00:00 2001 +From: Valentine Barshak <valentine.barshak@cogentembedded.com> +Date: Tue, 3 Mar 2015 18:30:16 +0300 +Subject: [PATCH] i2c: busses: rcar: Workaround arbitration loss error + +Sometimes I2C master enable/disable at every transmission +causes arbitration loss errors making the bus unusable. +Workaround the issue by enabling I2C master +in the rcar_i2c_init() function. + +Signed-off-by: Valentine Barshak <valentine.barshak@cogentembedded.com> +--- + drivers/i2c/busses/i2c-rcar.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c +index 0e863f3..4334006 100644 +--- a/drivers/i2c/busses/i2c-rcar.c ++++ b/drivers/i2c/busses/i2c-rcar.c +@@ -161,7 +161,7 @@ static void rcar_i2c_init(struct rcar_i2c_priv *priv) + + /* reset master mode */ + rcar_i2c_write(priv, ICMIER, 0); +- rcar_i2c_write(priv, ICMCR, 0); ++ rcar_i2c_write(priv, ICMCR, MDBS | MIE); + rcar_i2c_write(priv, ICMSR, 0); + rcar_i2c_write(priv, ICMAR, 0); + } +-- +1.9.3 + |