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https://github.com/brain-hackers/u-boot-brain
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73e4ba9868
Copy missing Kernel patch to make SLEWCTRL_SLOW available in device tree and to correct the value of SLEWCTRL_FAST. After this patch, the Kernel and U-boot device tree settings for SLEWCTRL have the same effect. Original Kernel patch message: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=424e0f039bfa8a51fb5c5178b6ece8baa4996469 " According to AM335x TRM, Document spruh73l, Revised February 2015, Section 9.2.2 Pad Control Registers, setting bit 6 of the pad control registers actually sets the SLEWCTRL value to slow rather than fast as the current macro indicates. Introduce a new macro, SLEWCTRL_SLOW, that sets the bit, and modify SLEWCTRL_FAST to 0 but keep it for completeness. Current users of the macro (i2c and mdio) are left unmodified as SLEWCTRL_FAST was the macro used and actual desired state. Tested on am335x-gp-evm with no difference in software performance seen. Signed-off-by: Dave Gerlach <d-gerlach@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com> " Signed-off-by: Christian Amann <Christian.Amann@de.bosch.com>
44 lines
1004 B
C
44 lines
1004 B
C
/*
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* This header provides constants specific to AM33XX pinctrl bindings.
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*/
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#ifndef _DT_BINDINGS_PINCTRL_AM33XX_H
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#define _DT_BINDINGS_PINCTRL_AM33XX_H
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#include <dt-bindings/pinctrl/omap.h>
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/* am33xx specific mux bit defines */
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#undef PULL_ENA
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#undef INPUT_EN
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#define PULL_DISABLE (1 << 3)
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#define INPUT_EN (1 << 5)
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#define SLEWCTRL_SLOW (1 << 6)
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#define SLEWCTRL_FAST 0
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/* update macro depending on INPUT_EN and PULL_ENA */
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#undef PIN_OUTPUT
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#undef PIN_OUTPUT_PULLUP
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#undef PIN_OUTPUT_PULLDOWN
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#undef PIN_INPUT
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#undef PIN_INPUT_PULLUP
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#undef PIN_INPUT_PULLDOWN
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#define PIN_OUTPUT (PULL_DISABLE)
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#define PIN_OUTPUT_PULLUP (PULL_UP)
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#define PIN_OUTPUT_PULLDOWN 0
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#define PIN_INPUT (INPUT_EN | PULL_DISABLE)
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#define PIN_INPUT_PULLUP (INPUT_EN | PULL_UP)
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#define PIN_INPUT_PULLDOWN (INPUT_EN)
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/* undef non-existing modes */
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#undef PIN_OFF_NONE
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#undef PIN_OFF_OUTPUT_HIGH
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#undef PIN_OFF_OUTPUT_LOW
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#undef PIN_OFF_INPUT_PULLUP
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#undef PIN_OFF_INPUT_PULLDOWN
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#undef PIN_OFF_WAKEUPENABLE
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#endif
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