diff options
| -rw-r--r-- | Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt | 21 | ||||
| -rw-r--r-- | drivers/i2c/busses/i2c-mv64xxx.c | 11 |
2 files changed, 25 insertions, 7 deletions
diff --git a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt index 21062bc3408d..befd4fb4764f 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt @@ -4,19 +4,26 @@ Required properties : - reg : Offset and length of the register set for the device - - compatible : Should be "marvell,mv64xxx-i2c" or "allwinner,sun4i-i2c" - or "marvell,mv78230-i2c" or "marvell,mv78230-a0-i2c" - Note: Only use "marvell,mv78230-a0-i2c" for a very rare, - initial version of the SoC which had broken offload - support. Linux auto-detects this and sets it - appropriately. + - compatible : Should be either: + - "allwinner,sun4i-i2c" + - "allwinner,sun6i-a31-i2c" + - "marvell,mv64xxx-i2c" + - "marvell,mv78230-i2c" + - "marvell,mv78230-a0-i2c" + * Note: Only use "marvell,mv78230-a0-i2c" for a + very rare, initial version of the SoC which + had broken offload support. Linux + auto-detects this and sets it appropriately. - interrupts : The interrupt number Optional properties : - clock-frequency : Desired I2C bus clock frequency in Hz. If not set the default frequency is 100kHz - - resets : phandle to the parent reset controller + + - resets : phandle to the parent reset controller. Mandatory + whenever you're using the "allwinner,sun6i-a31-i2c" + compatible. Examples: diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c index 1bb69b6f746d..203a5482a866 100644 --- a/drivers/i2c/busses/i2c-mv64xxx.c +++ b/drivers/i2c/busses/i2c-mv64xxx.c @@ -150,6 +150,7 @@ struct mv64xxx_i2c_data { /* 5us delay in order to avoid repeated start timing violation */ bool errata_delay; struct reset_control *rstc; + bool irq_clear_inverted; }; static struct mv64xxx_i2c_regs mv64xxx_i2c_regs_mv64xxx = { @@ -568,6 +569,11 @@ mv64xxx_i2c_intr(int irq, void *dev_id) status = readl(drv_data->reg_base + drv_data->reg_offsets.status); mv64xxx_i2c_fsm(drv_data, status); mv64xxx_i2c_do_action(drv_data); + + if (drv_data->irq_clear_inverted) + writel(drv_data->cntl_bits | MV64XXX_I2C_REG_CONTROL_IFLG, + drv_data->reg_base + drv_data->reg_offsets.control); + rc = IRQ_HANDLED; } spin_unlock_irqrestore(&drv_data->lock, flags); @@ -687,6 +693,7 @@ static const struct i2c_algorithm mv64xxx_i2c_algo = { */ static const struct of_device_id mv64xxx_i2c_of_match_table[] = { { .compatible = "allwinner,sun4i-i2c", .data = &mv64xxx_i2c_regs_sun4i}, + { .compatible = "allwinner,sun6i-a31-i2c", .data = &mv64xxx_i2c_regs_sun4i}, { .compatible = "marvell,mv64xxx-i2c", .data = &mv64xxx_i2c_regs_mv64xxx}, { .compatible = "marvell,mv78230-i2c", .data = &mv64xxx_i2c_regs_mv64xxx}, { .compatible = "marvell,mv78230-a0-i2c", .data = &mv64xxx_i2c_regs_mv64xxx}, @@ -795,6 +802,10 @@ mv64xxx_of_config(struct mv64xxx_i2c_data *drv_data, drv_data->offload_enabled = false; drv_data->errata_delay = true; } + + if (of_device_is_compatible(np, "allwinner,sun6i-a31-i2c")) + drv_data->irq_clear_inverted = true; + out: return rc; #endif |