SSSR_BSY
} while (Ser4SSSR & SSSR_BSY);
while (!(Ser4SSSR & SSSR_BSY)) {
while (pxa2xx_spi_read(drv_data, SSSR) & SSSR_BSY &&
} while ((pxa2xx_spi_read(drv_data, SSSR) & SSSR_BSY) && --limit);
while (pxa_ssp_read_reg(ssp, SSSR) & SSSR_BSY)