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Commit 0741bfb9 authored by Roger Quadros's avatar Roger Quadros Committed by Marc Kleine-Budde
Browse files

can: c_can: Add support for START pulse in RAMINIT sequence 



Some SoCs e.g. (TI DRA7xx) need a START pulse to start the
RAMINIT sequence i.e. START bit must be set and cleared before
checking for the DONE bit status.

Signed-off-by: default avatarRoger Quadros <rogerq@ti.com>
Signed-off-by: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
parent 3ff9027c

drivers/net/can/c_can/c_can.h

+1 −0
Original line number Diff line number Diff line
@@ -188,6 +188,7 @@ struct c_can_raminit { 
	struct regmap *syscon;	/* for raminit ctrl. reg. access */

	unsigned int reg;	/* register index within syscon */

	struct raminit_bits bits;

	bool needs_pulse;

};



/* c_can private data structure */

drivers/net/can/c_can/c_can_platform.c

+7 −0
Original line number Diff line number Diff line
@@ -120,6 +120,12 @@ static void c_can_hw_raminit_syscon(const struct c_can_priv *priv, bool enable) 
		ctrl |= 1 << raminit->bits.start;

		regmap_write(raminit->syscon, raminit->reg, ctrl);



		/* clear START bit if start pulse is needed */

		if (raminit->needs_pulse) {

			ctrl &= ~(1 << raminit->bits.start);

			regmap_write(raminit->syscon, raminit->reg, ctrl);

		}



		ctrl |= 1 << raminit->bits.done;

		c_can_hw_raminit_wait_syscon(priv, mask, ctrl);

	}
@@ -325,6 +331,7 @@ static int c_can_plat_probe(struct platform_device *pdev) 
			}



			raminit->bits = drvdata->raminit_bits[id];

			raminit->needs_pulse = drvdata->raminit_pulse;



			priv->raminit = c_can_hw_raminit_syscon;

		} else {