linux-dev/drivers/pinctrl/renesas/core.c, branch linus/master

pinctrl: renesas: checker: Add reserved field checks

2022-05-05T10:02:28Z

Add checks for discovering registers with reserved fields that could benefit from being described using variable-width reserved field shorthands, reducing kernel size. Signed-off-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/f5a5159ba7b396e6f09dd3f23c864a74ed8e342d.1649865241.git.geert+renesas@glider.be

pinctrl: renesas: Add shorthand for reserved register fields

2022-05-05T10:02:25Z

Currently, reserved register fields must be fully described using dummy enum IDs (zeroes), one for each possible state (2^bits states). Add support for describing reserved fields using negative field width values as shorthands, thus removing the need for dummy values. Apart from the obvious size reduction due to the removal of the dummy values, this will also enable merging adjacent reserved fields into a single field, reducing the number of fields to describe, and thus kernel size. Update the checker accordingly. Signed-off-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/cad7c92ef039d9a4d039807efc15886a7aa862be.1649865241.git.geert+renesas@glider.be

pinctrl: renesas: core: Fix possible null-ptr-deref in sh_pfc_map_resources()

2022-05-03T08:03:12Z

It will cause null-ptr-deref when using 'res', if platform_get_resource() returns NULL, so move using 'res' after devm_ioremap_resource() that will check it to avoid null-ptr-deref. And use devm_platform_get_and_ioremap_resource() to simplify code. Fixes: c7977ec4a336 ("pinctrl: sh-pfc: Convert to platform_get_*()") Signed-off-by: Yang Yingliang Link: https://lore.kernel.org/r/20220429082637.1308182-1-yangyingliang@huawei.com Signed-off-by: Geert Uytterhoeven

pinctrl: renesas: checker: Rework drive and bias pin iteration

2022-04-20T09:53:46Z

The checker code to iterate over all drive strength and bias register description items is cumbersome, due to the repeated calculation of indices, and the use of hardcoded array sizes. The latter was done under the assumption they would never need to be changed, which turned out to be false. Increase readability by introducing helper macros to access drive strength and bias register description items. Increase maintainability by replacing hardcoded numbers by array sizes calculated at compile-time. Signed-off-by: Geert Uytterhoeven Reviewed-by: Wolfram Sang Link: https://lore.kernel.org/r/5051ae56a1388ccf2d283dfc9624de2991cce914.1650355619.git.geert+renesas@glider.be

pinctrl: renesas: Initial R8A779F0 PFC support

2022-02-25T12:45:48Z

Add initial Pin Function Controller (PFC) support for the Renesas R-Car S4-8 (R8A779F0) SoC, including bias, drive strength and voltage control. Based on a larger patch in the BSP by LUU HOAI. Signed-off-by: Geert Uytterhoeven Acked-by: Yoshihiro Shimoda Link: https://lore.kernel.org/r/fd8201da404b7b0897130b254380ffc97f437266.1645457792.git.geert+renesas@glider.be

pinctrl: renesas: checker: Fix miscalculation of number of states

2022-02-24T12:59:49Z

The checker failed to validate all enum IDs in the description of a register with fixed-width register fields, due to a miscalculation of the number of described states: each register field of n bits can have "1 << n" possible states, not "1". Increase SH_PFC_MAX_ENUMS accordingly, now more enum IDs are checked (SH-Mobile AG5 has more than 4000 enum IDs defined). Fixes: 12d057bad683b1c6 ("pinctrl: sh-pfc: checker: Add check for enum ID conflicts") Signed-off-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/6d8a6a05564f38f9d20464c1c17f96e52740cf6a.1645460429.git.geert+renesas@glider.be

pinctrl: renesas: checker: Check drive pin conflicts

2022-02-22T08:57:19Z

Check that there is only a single entry for each pin with drive strength capabilities. Signed-off-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/382206e737710afd3059abe75bc41e324823e657.1640270559.git.geert+renesas@glider.be

pinctrl: renesas: checker: Check bias pin conflicts

2022-02-22T08:57:19Z

Check that there is only a single entry for each pin with pull-up and/or pull-down capabilities. Signed-off-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/dbda76f342258f8029f0420fbe3f341a9abd6f01.1640270559.git.geert+renesas@glider.be

pinctrl: renesas: checker: Validate I/O voltage configs consistency

2022-02-22T08:57:19Z

Validate consistency of the pin control tables for pins with I/O voltage capabilities. If a pin has I/O voltage register bits declarations through .pin_to_pocctrl(), the SH_PFC_PIN_CFG_IO_VOLTAGE flag should be set in the pin's configs, and vice versa. Signed-off-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/de81cced01ae3f26d341177d66d4b8e918fbfb76.1640270559.git.geert+renesas@glider.be

pinctrl: renesas: checker: Validate drive strength configs consistency

2022-02-22T08:57:19Z

Validate consistency of the pin control tables for pins with drive strength capabilities. If a pin has drive strength register bits declarations in drive_regs[], the SH_PFC_PIN_CFG_DRIVE_STRENGTH flag should be set in the pin's configs, and vice versa. Signed-off-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/0d5de01b5fe2c5fd23c3bea41077dc57ad105b9e.1640270559.git.geert+renesas@glider.be