diff mbox series

[i2c-next,v4,5/6] i2c: mux: mlxcpld: Extend supported mux number

Message ID 20210204162451.29518-6-vadimp@nvidia.com
State Superseded
Delegated to: Peter Rosin
Headers show
Series i2c: mux: mlxcpld: Extend driver functionality | expand

Commit Message

Vadim Pasternak Feb. 4, 2021, 4:24 p.m. UTC 
Allow to extend mux number supported by driver.
Currently it is limited by eight, which is not enough for new coming
Mellanox modular system with line cards, which require up to 64 mux
support.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Michael Shych <michaelsh@nvidia.com>
---
v3->v4:
 Comments pointed out by Peter:
 - Move changes for i2c_mux_add_adapter(): use 'chan_id' instead of
  'force_nr' to patch #4.
v1->v2:
 Comments pointed out by Peter:
 - Remove introducing of 'base_nr' field.
 - Drop chan increment in mlxcpld_mux_select_chan().
 Added by Vadim:
 - Rename 'adaps_ids' array to 'chan_ids' array.
 - Drop forcing of adapter 'nr'.
---
 drivers/i2c/muxes/i2c-mux-mlxcpld.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/i2c/muxes/i2c-mux-mlxcpld.c b/drivers/i2c/muxes/i2c-mux-mlxcpld.c
index ba307ee6b034..5e0672f9979b 100644
--- a/drivers/i2c/muxes/i2c-mux-mlxcpld.c
+++ b/drivers/i2c/muxes/i2c-mux-mlxcpld.c
@@ -15,8 +15,6 @@ 
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 
-#define CPLD_MUX_MAX_NCHANS	8
-
 /* mlxcpld_mux - mux control structure:
  * @last_val - last selected register value or -1 if mux deselected
  * @client - I2C device client
@@ -142,7 +140,7 @@  static int mlxcpld_mux_probe(struct platform_device *pdev)
 	if (!i2c_check_functionality(client->adapter, func))
 		return -ENODEV;
 
-	muxc = i2c_mux_alloc(client->adapter, &pdev->dev, CPLD_MUX_MAX_NCHANS,
+	muxc = i2c_mux_alloc(client->adapter, &pdev->dev, pdata->num_adaps,
 			     sizeof(*data), 0, mlxcpld_mux_select_chan,
 			     mlxcpld_mux_deselect);
 	if (!muxc)
@@ -155,7 +153,7 @@  static int mlxcpld_mux_probe(struct platform_device *pdev)
 	data->last_val = -1; /* force the first selection */
 
 	/* Create an adapter for each channel. */
-	for (num = 0; num < CPLD_MUX_MAX_NCHANS; num++) {
+	for (num = 0; num < pdata->num_adaps; num++) {
 		err = i2c_mux_add_adapter(muxc, 0, pdata->chan_ids[num], 0);
 		if (err)
 			goto virt_reg_failed;