Hello, This patch series adds drive strength control support to the sh-pfc driver for the R8A7795 (R-Car H3) SoC. The SoC can control the drive strength of all GPIO pins, as well as of some dedicated-purpose pins. As the R8A7795 pinctrl driver doesn't support non-GPIO pins yet, this series is limited to controlling the drive strength on the GPIO pins. Patch 1/2 adds drive strength support to the sh-pfc driver. It hardcodes a few assumptions that might be specific to the R8A7795, I'll revisit them if future SoCs break them. Patch 2/2 adds R8A7795-specific support by setting the drive strength configuration flag for all GPIO pins, and defining the drive strength registers layout. The series has been tested on the Salvator-X board with the GPIO pins connected to the on-board LEDs. The 4.7µF capacitor to ground provides a large enough load on the lines to make the effect of the drive strength easily measurable with an oscilloscope. Changes compared to v1: - Fix conversion from register value to mA - Fix boundary checking when setting drive strength Laurent Pinchart (2): pinctrl: sh-pfc: Add drive strength support pinctrl: sh-pfc: r8a7795: Add drive strength support .../bindings/pinctrl/renesas,pfc-pinctrl.txt | 4 +- drivers/pinctrl/sh-pfc/core.c | 15 ++ drivers/pinctrl/sh-pfc/core.h | 3 + drivers/pinctrl/sh-pfc/pfc-r8a7795.c | 218 ++++++++++++++++++++- drivers/pinctrl/sh-pfc/pinctrl.c | 111 +++++++++++ drivers/pinctrl/sh-pfc/sh_pfc.h | 17 ++ 6 files changed, 358 insertions(+), 10 deletions(-) -- Regards, Laurent Pinchart
