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spi: pxa2xx: Make LPSS SPI general register optional 

General register located in LPSS SPI private register space is not found in
upcoming Intel LPSS platforms. Access it conditionally depending is it
defined in configuration.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jarkko Nikula 2015-06-04 16:55:12 +03:00 committed by Mark Brown
parent dccf736965
commit 82ba2c2ab3
1 changed files with 7 additions and 3 deletions
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10
drivers/spi/spi-pxa2xx.c
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@ -245,9 +245,13 @@ static void lpss_ssp_setup(struct driver_data *drv_data)
if (drv_data->master_info->enable_dma) {
__lpss_ssp_write_priv(drv_data, config->reg_ssp, 1);
value = __lpss_ssp_read_priv(drv_data, config->reg_general);
value |= GENERAL_REG_RXTO_HOLDOFF_DISABLE;
__lpss_ssp_write_priv(drv_data, config->reg_general, value);
if (config->reg_general >= 0) {
value = __lpss_ssp_read_priv(drv_data,
config->reg_general);
value |= GENERAL_REG_RXTO_HOLDOFF_DISABLE;
__lpss_ssp_write_priv(drv_data,
config->reg_general, value);
}
}
}