linux-kernel - [PATCH v1 1/2] mfd: da9052: Fix register access via SPI

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Message-ID: <856964c7285656c88f23d0bcd5dae8519c2a1227.1425490309.git.adam.ward.opensource@diasemi.com>
Date:	Wed, 4 Mar 2015 16:13:12 +0000
From:	Adam Ward <adam.ward.opensource@...semi.com>
To:	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>
CC:	Support Opensource <support.opensource@...semi.com>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH v1 1/2] mfd: da9052: Fix register access via SPI

The range of registers used by this driver exceeds that available
via SPI with no paging (127), so we have to override the values
from the default config which is set-up for I2C access.
Also change SPI settings to match device's recommended OTP values.

Signed-off-by: Adam Ward <adam.ward.opensource@...semi.com>
Tested-by: Adam Ward <adam.ward.opensource@...semi.com>
---
 drivers/mfd/da9052-spi.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/mfd/da9052-spi.c b/drivers/mfd/da9052-spi.c
index 45ae0b7..b5de8a6 100644
--- a/drivers/mfd/da9052-spi.c
+++ b/drivers/mfd/da9052-spi.c
@@ -32,7 +32,7 @@ static int da9052_spi_probe(struct spi_device *spi)
 	if (!da9052)
 		return -ENOMEM;

-	spi->mode = SPI_MODE_0 | SPI_CPOL;
+	spi->mode = SPI_MODE_0;
 	spi->bits_per_word = 8;
 	spi_setup(spi);

@@ -43,6 +43,10 @@ static int da9052_spi_probe(struct spi_device *spi)

 	config = da9052_regmap_config;
 	config.read_flag_mask = 1;
+	config.reg_bits = 7;
+	config.pad_bits = 1;
+	config.val_bits = 8;
+	config.use_single_rw = 1;

 	da9052->regmap = devm_regmap_init_spi(spi, &config);
 	if (IS_ERR(da9052->regmap)) {
-- 
end-of-patch for mfd: da9052: Fix SPI access and IRQ config

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