From bd751808f9ff5e1822c627f6c4283009e66b2e53 Mon Sep 17 00:00:00 2001 From: Geoff Lansberry Date: Thu, 27 Apr 2017 17:28:46 -0400 Subject: [PATCH] NFC: trf7970a: Correct register settings for 27MHz clock In prior commits the selected clock frequency does not propagate correctly to what is written to the TRF7970A_MODULATOR_SYS_CLK_CTRL register. Signed-off-by: Geoff Lansberry Acked-by: Mark Greer Signed-off-by: Samuel Ortiz --- drivers/nfc/trf7970a.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c index 6ee7b03..eee5cc1 100644 --- a/drivers/nfc/trf7970a.c +++ b/drivers/nfc/trf7970a.c @@ -2049,6 +2049,13 @@ static int trf7970a_probe(struct spi_device *spi) return -EINVAL; } + if (clk_freq == TRF7970A_27MHZ_CLOCK_FREQUENCY) { + trf->modulator_sys_clk_ctrl = TRF7970A_MODULATOR_27MHZ; + dev_dbg(trf->dev, "trf7970a configured for 27MHz crystal\n"); + } else { + trf->modulator_sys_clk_ctrl = 0; + } + ret = devm_request_threaded_irq(trf->dev, spi->irq, NULL, trf7970a_irq, IRQF_TRIGGER_RISING | IRQF_ONESHOT, -- 2.7.4