ARM: dts: dra7x-evm: avoid possible contention while muxing on CAN lines
DCAN1 RX and TX lines are internally pulled high according to [1]. While muxing between DCAN mode and SAFE mode we make sure that the same pull direction is set to minimize opposite pull contention during the switching window. [1] in DRA7 data manual, Ball characteristics table 4-2, DSIS colum shows the state driven to the peripheral input while in the deselcted mode. DSIS - De-Selected Input State. Signed-off-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
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@ -263,15 +263,15 @@ davinci_mdio_sleep: davinci_mdio_sleep {
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dcan1_pins_default: dcan1_pins_default {
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pinctrl-single,pins = <
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0x3d0 (PIN_OUTPUT | MUX_MODE0) /* dcan1_tx */
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0x418 (PULL_DIS | MUX_MODE1) /* wakeup0.dcan1_rx */
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0x3d0 (PIN_OUTPUT_PULLUP | MUX_MODE0) /* dcan1_tx */
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0x418 (PULL_UP | MUX_MODE1) /* wakeup0.dcan1_rx */
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>;
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};
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dcan1_pins_sleep: dcan1_pins_sleep {
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pinctrl-single,pins = <
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0x3d0 (MUX_MODE15) /* dcan1_tx.off */
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0x418 (MUX_MODE15) /* wakeup0.off */
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0x3d0 (MUX_MODE15 | PULL_UP) /* dcan1_tx.off */
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0x418 (MUX_MODE15 | PULL_UP) /* wakeup0.off */
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>;
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};
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};
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@ -119,15 +119,15 @@ mmc2_pins_default: mmc2_pins_default {
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dcan1_pins_default: dcan1_pins_default {
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pinctrl-single,pins = <
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0x3d0 (PIN_OUTPUT | MUX_MODE0) /* dcan1_tx */
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0x418 (PULL_DIS | MUX_MODE1) /* wakeup0.dcan1_rx */
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0x3d0 (PIN_OUTPUT_PULLUP | MUX_MODE0) /* dcan1_tx */
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0x418 (PULL_UP | MUX_MODE1) /* wakeup0.dcan1_rx */
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>;
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};
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dcan1_pins_sleep: dcan1_pins_sleep {
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pinctrl-single,pins = <
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0x3d0 (MUX_MODE15) /* dcan1_tx.off */
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0x418 (MUX_MODE15) /* wakeup0.off */
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0x3d0 (MUX_MODE15 | PULL_UP) /* dcan1_tx.off */
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0x418 (MUX_MODE15 | PULL_UP) /* wakeup0.off */
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>;
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};
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