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authorPrzemyslaw Gaj <pgaj@cadence.com>2019-04-16 09:36:14 +0100
committerBoris Brezillon <boris.brezillon@collabora.com>2019-05-28 09:39:53 +0200
commit88c50322449a4dea8687ed155968d19cfc763393 (patch)
treeac3e59e2c53670b035f7e5b9edff48b35eaf25cd /drivers/i3c
parenta188339ca5a396acc588e5851ed7e19f66b0ebd9 (diff)
downloadlinux-88c50322449a4dea8687ed155968d19cfc763393.tar.gz
i3c: Drop support for I2C 10 bit addresing
This patch drops support for I2C devices with 10 bit addressing. When I2C device with 10 bit address is defined in DT, I3C master registration fails. Address space for I2C devices has been reduced and ->i2c_funcs() hook has been removed. Because this patch series dropped support for 10 bit I2C devices, support is also dropped in Cadence I3C master driver and Synopsys DesignWare I3C master driver. Signed-off-by: Przemyslaw Gaj <pgaj@cadence.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Diffstat (limited to 'drivers/i3c')
-rw-r--r--drivers/i3c/master.c21
-rw-r--r--drivers/i3c/master/dw-i3c-master.c6
-rw-r--r--drivers/i3c/master/i3c-master-cdns.c10
3 files changed, 15 insertions, 22 deletions
diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index 5f4bd52121fe..b9d2b88928e1 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -1963,6 +1963,16 @@ of_i3c_master_add_i2c_boardinfo(struct i3c_master_controller *master,
if (ret)
return ret;
+ /*
+ * The I3C Specification does not clearly say I2C devices with 10-bit
+ * address are supported. These devices can't be passed properly through
+ * DEFSLVS command.
+ */
+ if (boardinfo->base.flags & I2C_CLIENT_TEN) {
+ dev_err(&master->dev, "I2C device with 10 bit address not supported.");
+ return -ENOTSUPP;
+ }
+
/* LVR is encoded in reg[2]. */
boardinfo->lvr = reg[2];
@@ -2111,16 +2121,14 @@ static int i3c_master_i2c_adapter_xfer(struct i2c_adapter *adap,
return ret ? ret : nxfers;
}
-static u32 i3c_master_i2c_functionalities(struct i2c_adapter *adap)
+static u32 i3c_master_i2c_funcs(struct i2c_adapter *adapter)
{
- struct i3c_master_controller *master = i2c_adapter_to_i3c_master(adap);
-
- return master->ops->i2c_funcs(master);
+ return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C;
}
static const struct i2c_algorithm i3c_master_i2c_algo = {
.master_xfer = i3c_master_i2c_adapter_xfer,
- .functionality = i3c_master_i2c_functionalities,
+ .functionality = i3c_master_i2c_funcs,
};
static int i3c_master_i2c_adapter_init(struct i3c_master_controller *master)
@@ -2379,8 +2387,7 @@ EXPORT_SYMBOL_GPL(i3c_generic_ibi_recycle_slot);
static int i3c_master_check_ops(const struct i3c_master_controller_ops *ops)
{
if (!ops || !ops->bus_init || !ops->priv_xfers ||
- !ops->send_ccc_cmd || !ops->do_daa || !ops->i2c_xfers ||
- !ops->i2c_funcs)
+ !ops->send_ccc_cmd || !ops->do_daa || !ops->i2c_xfers)
return -EINVAL;
if (ops->request_ibi &&
diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c
index 1d83c97431c7..d6e517e69f84 100644
--- a/drivers/i3c/master/dw-i3c-master.c
+++ b/drivers/i3c/master/dw-i3c-master.c
@@ -1060,11 +1060,6 @@ static void dw_i3c_master_detach_i2c_dev(struct i2c_dev_desc *dev)
kfree(data);
}
-static u32 dw_i3c_master_i2c_funcs(struct i3c_master_controller *m)
-{
- return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
-}
-
static irqreturn_t dw_i3c_master_irq_handler(int irq, void *dev_id)
{
struct dw_i3c_master *master = dev_id;
@@ -1099,7 +1094,6 @@ static const struct i3c_master_controller_ops dw_mipi_i3c_ops = {
.attach_i2c_dev = dw_i3c_master_attach_i2c_dev,
.detach_i2c_dev = dw_i3c_master_detach_i2c_dev,
.i2c_xfers = dw_i3c_master_i2c_xfers,
- .i2c_funcs = dw_i3c_master_i2c_funcs,
};
static int dw_i3c_probe(struct platform_device *pdev)
diff --git a/drivers/i3c/master/i3c-master-cdns.c b/drivers/i3c/master/i3c-master-cdns.c
index 8889a4fdb454..237f24adddc6 100644
--- a/drivers/i3c/master/i3c-master-cdns.c
+++ b/drivers/i3c/master/i3c-master-cdns.c
@@ -864,11 +864,6 @@ static int cdns_i3c_master_i2c_xfers(struct i2c_dev_desc *dev,
return ret;
}
-static u32 cdns_i3c_master_i2c_funcs(struct i3c_master_controller *m)
-{
- return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C | I2C_FUNC_10BIT_ADDR;
-}
-
struct cdns_i3c_i2c_dev_data {
u16 id;
s16 ibi;
@@ -1010,9 +1005,7 @@ static int cdns_i3c_master_attach_i2c_dev(struct i2c_dev_desc *dev)
master->free_rr_slots &= ~BIT(slot);
i2c_dev_set_master_data(dev, data);
- writel(prepare_rr0_dev_address(dev->boardinfo->base.addr) |
- (dev->boardinfo->base.flags & I2C_CLIENT_TEN ?
- DEV_ID_RR0_LVR_EXT_ADDR : 0),
+ writel(prepare_rr0_dev_address(dev->boardinfo->base.addr),
master->regs + DEV_ID_RR0(data->id));
writel(dev->boardinfo->lvr, master->regs + DEV_ID_RR2(data->id));
writel(readl(master->regs + DEVS_CTRL) |
@@ -1518,7 +1511,6 @@ static const struct i3c_master_controller_ops cdns_i3c_master_ops = {
.send_ccc_cmd = cdns_i3c_master_send_ccc_cmd,
.priv_xfers = cdns_i3c_master_priv_xfers,
.i2c_xfers = cdns_i3c_master_i2c_xfers,
- .i2c_funcs = cdns_i3c_master_i2c_funcs,
.enable_ibi = cdns_i3c_master_enable_ibi,
.disable_ibi = cdns_i3c_master_disable_ibi,
.request_ibi = cdns_i3c_master_request_ibi,