diff options
| -rw-r--r-- | drivers/spi/spi-fsl-espi.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c index a7fdb87..0b03ae3 100644 --- a/drivers/spi/spi-fsl-espi.c +++ b/drivers/spi/spi-fsl-espi.c @@ -739,6 +739,35 @@ static int of_fsl_espi_remove(struct platform_device *dev) } #ifdef CONFIG_PM_SLEEP +#define DCFG_CCSR_DEVDISR4_OFF 0x7c +#define ESPI_BIT (1 << 27) + +static int hw_disable_espi(int disable) +{ + struct device_node *np; + void __iomem *gut_addr = NULL; /* Local Access Control registers */ + u32 regval; + + np = of_find_compatible_node(NULL, NULL, "fsl,t1040-device-config"); + if (!np) { + pr_err("could not find a guts node\n"); + return -ENODEV; + } + gut_addr = of_iomap(np, 0); + if (!gut_addr) + return -ENODEV; + + regval = in_be32(gut_addr + DCFG_CCSR_DEVDISR4_OFF); + if (disable == true) + regval |= ESPI_BIT; + else + regval &= ~ESPI_BIT; + + out_be32(gut_addr + DCFG_CCSR_DEVDISR4_OFF, regval); + + return 0; +} + static int of_fsl_espi_suspend(struct device *dev) { struct spi_master *master = dev_get_drvdata(dev); @@ -760,6 +789,8 @@ static int of_fsl_espi_suspend(struct device *dev) regval &= ~SPMODE_ENABLE; mpc8xxx_spi_write_reg(®_base->mode, regval); + hw_disable_espi(true); + return 0; } @@ -772,6 +803,8 @@ static int of_fsl_espi_resume(struct device *dev) u32 regval; int i; + hw_disable_espi(false); + mpc8xxx_spi = spi_master_get_devdata(master); reg_base = mpc8xxx_spi->reg_base; |