Unverified Commit 56b0bb7f authored by Vadim Pasternak's avatar Vadim Pasternak Committed by Ilpo Järvinen
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platform: mellanox: nvsw-sn2200: Add support for new system flavour 



Add support for SN2201 system flavour, which is fitting OCP rack
form-factor and feeded from external power source through the rack
standard busbar interface.

Validate system type through DMI decode.
For new system flavour:
- Skip internal power supply configuration.
- Attach power hotswap device.

Reviewed-by: default avatarMichael Shych <michaelsh@nvidia.com>
Signed-off-by: default avatarVadim Pasternak <vadimp@nvidia.com>
Link: https://lore.kernel.org/r/20250504165507.9003-2-vadimp@nvidia.com


Reviewed-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
parent c5925f43

drivers/platform/mellanox/nvsw-sn2201.c

+107 −3
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ 
 */



#include <linux/device.h>

#include <linux/dmi.h>

#include <linux/i2c.h>

#include <linux/interrupt.h>

#include <linux/irq.h>
@@ -104,6 +105,9 @@ 
	| NVSW_SN2201_CPLD_AGGR_PSU_MASK_DEF \

	| NVSW_SN2201_CPLD_AGGR_PWR_MASK_DEF \

	| NVSW_SN2201_CPLD_AGGR_FAN_MASK_DEF)

#define NVSW_SN2201_CPLD_AGGR_BUSBAR_MASK_DEF \

	(NVSW_SN2201_CPLD_AGGR_ASIC_MASK_DEF \

	| NVSW_SN2201_CPLD_AGGR_FAN_MASK_DEF)



#define NVSW_SN2201_CPLD_ASIC_MASK		GENMASK(3, 1)

#define NVSW_SN2201_CPLD_PSU_MASK		GENMASK(1, 0)
@@ -132,6 +136,7 @@ 
 * @cpld_devs: I2C devices for cpld;

 * @cpld_devs_num: number of I2C devices for cpld;

 * @main_mux_deferred_nr: I2C adapter number must be exist prior creating devices execution;

 * @ext_pwr_source: true if system powered by external power supply; false - by internal;

 */

struct nvsw_sn2201 {

	struct device *dev;
@@ -152,6 +157,7 @@ struct nvsw_sn2201 { 
	struct mlxreg_hotplug_device *cpld_devs;

	int cpld_devs_num;

	int main_mux_deferred_nr;

	bool ext_pwr_source;

};



static bool nvsw_sn2201_writeable_reg(struct device *dev, unsigned int reg)
@@ -522,6 +528,35 @@ struct mlxreg_core_hotplug_platform_data nvsw_sn2201_hotplug = { 
	.mask = NVSW_SN2201_CPLD_AGGR_MASK_DEF,

};



static struct mlxreg_core_item nvsw_sn2201_busbar_items[] = {

	{

		.data = nvsw_sn2201_fan_items_data,

		.aggr_mask = NVSW_SN2201_CPLD_AGGR_FAN_MASK_DEF,

		.reg = NVSW_SN2201_FAN_PRSNT_STATUS_OFFSET,

		.mask = NVSW_SN2201_CPLD_FAN_MASK,

		.count = ARRAY_SIZE(nvsw_sn2201_fan_items_data),

		.inversed = 1,

		.health = false,

	},

	{

		.data = nvsw_sn2201_sys_items_data,

		.aggr_mask = NVSW_SN2201_CPLD_AGGR_ASIC_MASK_DEF,

		.reg = NVSW_SN2201_ASIC_STATUS_OFFSET,

		.mask = NVSW_SN2201_CPLD_ASIC_MASK,

		.count = ARRAY_SIZE(nvsw_sn2201_sys_items_data),

		.inversed = 1,

		.health = false,

	},

};



static

struct mlxreg_core_hotplug_platform_data nvsw_sn2201_busbar_hotplug = {

	.items = nvsw_sn2201_items,

	.count = ARRAY_SIZE(nvsw_sn2201_busbar_items),

	.cell = NVSW_SN2201_SYS_INT_STATUS_OFFSET,

	.mask = NVSW_SN2201_CPLD_AGGR_BUSBAR_MASK_DEF,

};



/* SN2201 static devices. */

static struct i2c_board_info nvsw_sn2201_static_devices[] = {

	{
@@ -557,6 +592,9 @@ static struct i2c_board_info nvsw_sn2201_static_devices[] = { 
	{

		I2C_BOARD_INFO("pmbus", 0x40),

	},

	{

		I2C_BOARD_INFO("lm5066i", 0x15),

	},

};



/* SN2201 default static board info. */
@@ -607,6 +645,58 @@ static struct mlxreg_hotplug_device nvsw_sn2201_static_brdinfo[] = { 
	},

};



/* SN2201 default busbar static board info. */

static struct mlxreg_hotplug_device nvsw_sn2201_busbar_static_brdinfo[] = {

	{

		.brdinfo = &nvsw_sn2201_static_devices[0],

		.nr = NVSW_SN2201_MAIN_NR,

	},

	{

		.brdinfo = &nvsw_sn2201_static_devices[1],

		.nr = NVSW_SN2201_MAIN_MUX_CH0_NR,

	},

	{

		.brdinfo = &nvsw_sn2201_static_devices[2],

		.nr = NVSW_SN2201_MAIN_MUX_CH0_NR,

	},

	{

		.brdinfo = &nvsw_sn2201_static_devices[3],

		.nr = NVSW_SN2201_MAIN_MUX_CH0_NR,

	},

	{

		.brdinfo = &nvsw_sn2201_static_devices[4],

		.nr = NVSW_SN2201_MAIN_MUX_CH3_NR,

	},

	{

		.brdinfo = &nvsw_sn2201_static_devices[5],

		.nr = NVSW_SN2201_MAIN_MUX_CH5_NR,

	},

	{

		.brdinfo = &nvsw_sn2201_static_devices[6],

		.nr = NVSW_SN2201_MAIN_MUX_CH5_NR,

	},

	{

		.brdinfo = &nvsw_sn2201_static_devices[7],

		.nr = NVSW_SN2201_MAIN_MUX_CH5_NR,

	},

	{

		.brdinfo = &nvsw_sn2201_static_devices[8],

		.nr = NVSW_SN2201_MAIN_MUX_CH6_NR,

	},

	{

		.brdinfo = &nvsw_sn2201_static_devices[9],

		.nr = NVSW_SN2201_MAIN_MUX_CH6_NR,

	},

	{

		.brdinfo = &nvsw_sn2201_static_devices[10],

		.nr = NVSW_SN2201_MAIN_MUX_CH7_NR,

	},

	{

		.brdinfo = &nvsw_sn2201_static_devices[11],

		.nr = NVSW_SN2201_MAIN_MUX_CH1_NR,

	},

};



/* LED default data. */

static struct mlxreg_core_data nvsw_sn2201_led_data[] = {

	{
@@ -981,6 +1071,9 @@ static int nvsw_sn2201_config_init(struct nvsw_sn2201 *nvsw_sn2201, void *regmap 
	nvsw_sn2201->io_data = &nvsw_sn2201_regs_io;

	nvsw_sn2201->led_data = &nvsw_sn2201_led;

	nvsw_sn2201->wd_data = &nvsw_sn2201_wd;

	if (nvsw_sn2201->ext_pwr_source)

		nvsw_sn2201->hotplug_data = &nvsw_sn2201_busbar_hotplug;

	else

		nvsw_sn2201->hotplug_data = &nvsw_sn2201_hotplug;



	/* Register IO access driver. */
@@ -1198,12 +1291,18 @@ static int nvsw_sn2201_config_pre_init(struct nvsw_sn2201 *nvsw_sn2201) 
static int nvsw_sn2201_probe(struct platform_device *pdev)

{

	struct nvsw_sn2201 *nvsw_sn2201;

	const char *sku;

	int ret;



	nvsw_sn2201 = devm_kzalloc(&pdev->dev, sizeof(*nvsw_sn2201), GFP_KERNEL);

	if (!nvsw_sn2201)

		return -ENOMEM;



	/* Validate system powering type - only HI168 SKU supports external power. */

	sku = dmi_get_system_info(DMI_PRODUCT_SKU);

	if (sku && !strcmp(sku, "HI168"))

		nvsw_sn2201->ext_pwr_source = true;



	nvsw_sn2201->dev = &pdev->dev;

	platform_set_drvdata(pdev, nvsw_sn2201);

	ret = platform_device_add_resources(pdev, nvsw_sn2201_lpc_io_resources,
@@ -1214,8 +1313,13 @@ static int nvsw_sn2201_probe(struct platform_device *pdev) 
	nvsw_sn2201->main_mux_deferred_nr = NVSW_SN2201_MAIN_MUX_DEFER_NR;

	nvsw_sn2201->main_mux_devs = nvsw_sn2201_main_mux_brdinfo;

	nvsw_sn2201->cpld_devs = nvsw_sn2201_cpld_brdinfo;

	if (nvsw_sn2201->ext_pwr_source) {

		nvsw_sn2201->sn2201_devs = nvsw_sn2201_busbar_static_brdinfo;

		nvsw_sn2201->sn2201_devs_num = ARRAY_SIZE(nvsw_sn2201_busbar_static_brdinfo);

	} else {

		nvsw_sn2201->sn2201_devs = nvsw_sn2201_static_brdinfo;

		nvsw_sn2201->sn2201_devs_num = ARRAY_SIZE(nvsw_sn2201_static_brdinfo);

	}



	return nvsw_sn2201_config_pre_init(nvsw_sn2201);

}