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fsi: master: Add boolean parameter to link_enable function 

Add the ability to disable a link with a boolean parameter to the
link_enable function. This is necessary so that the master can disable
links that it isn't using; for example, links to slaves that fail
initialization.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>
This commit is contained in:
Eddie James 2020-06-09 16:39:27 -05:00 committed by Joel Stanley
parent 3c3c484850
commit 04635a30dd
6 changed files with 21 additions and 8 deletions
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2
drivers/fsi/fsi-core.c
View File

@ -1157,7 +1157,7 @@ static int fsi_master_write(struct fsi_master *master, int link,
static int fsi_master_link_enable(struct fsi_master *master, int link)
{
if (master->link_enable)
return master->link_enable(master, link);
return master->link_enable(master, link, true);
return 0;
}

7
drivers/fsi/fsi-master-aspeed.c
View File

@ -301,7 +301,8 @@ static int aspeed_master_write(struct fsi_master *master, int link,
return 0;
}
static int aspeed_master_link_enable(struct fsi_master *master, int link)
static int aspeed_master_link_enable(struct fsi_master *master, int link,
bool enable)
{
struct fsi_master_aspeed *aspeed = to_fsi_master_aspeed(master);
int idx, bit, ret;
@ -312,6 +313,10 @@ static int aspeed_master_link_enable(struct fsi_master *master, int link)
reg = cpu_to_be32(0x80000000 >> bit);
if (!enable)
return opb_writel(aspeed, ctrl_base + FSI_MCENP0 + (4 * idx),
reg);
ret = opb_writel(aspeed, ctrl_base + FSI_MSENP0 + (4 * idx), reg);
if (ret)
return ret;

5
drivers/fsi/fsi-master-ast-cf.c
View File

@ -1039,7 +1039,8 @@ static void fsi_master_acf_setup_external(struct fsi_master_acf *master)
gpiod_direction_input(master->gpio_data);
}
static int fsi_master_acf_link_enable(struct fsi_master *_master, int link)
static int fsi_master_acf_link_enable(struct fsi_master *_master, int link,
bool enable)
{
struct fsi_master_acf *master = to_fsi_master_acf(_master);
int rc = -EBUSY;
@ -1049,7 +1050,7 @@ static int fsi_master_acf_link_enable(struct fsi_master *_master, int link)
mutex_lock(&master->lock);
if (!master->external_mode) {
gpiod_set_value(master->gpio_enable, 1);
gpiod_set_value(master->gpio_enable, enable ? 1 : 0);
rc = 0;
}
mutex_unlock(&master->lock);

5
drivers/fsi/fsi-master-gpio.c
View File

@ -678,7 +678,8 @@ static void fsi_master_gpio_init_external(struct fsi_master_gpio *master)
gpiod_direction_input(master->gpio_data);
}
static int fsi_master_gpio_link_enable(struct fsi_master *_master, int link)
static int fsi_master_gpio_link_enable(struct fsi_master *_master, int link,
bool enable)
{
struct fsi_master_gpio *master = to_fsi_master_gpio(_master);
int rc = -EBUSY;
@ -688,7 +689,7 @@ static int fsi_master_gpio_link_enable(struct fsi_master *_master, int link)
mutex_lock(&master->cmd_lock);
if (!master->external_mode) {
gpiod_set_value(master->gpio_enable, 1);
gpiod_set_value(master->gpio_enable, enable ? 1 : 0);
rc = 0;
}
mutex_unlock(&master->cmd_lock);

7
drivers/fsi/fsi-master-hub.c
View File

@ -77,7 +77,8 @@ static int hub_master_break(struct fsi_master *master, int link)
return hub_master_write(master, link, 0, addr, &cmd, sizeof(cmd));
}
static int hub_master_link_enable(struct fsi_master *master, int link)
static int hub_master_link_enable(struct fsi_master *master, int link,
bool enable)
{
struct fsi_master_hub *hub = to_fsi_master_hub(master);
int idx, bit;
@ -89,6 +90,10 @@ static int hub_master_link_enable(struct fsi_master *master, int link)
reg = cpu_to_be32(0x80000000 >> bit);
if (!enable)
return fsi_device_write(hub->upstream, FSI_MCENP0 + (4 * idx),
&reg, 4);
rc = fsi_device_write(hub->upstream, FSI_MSENP0 + (4 * idx), &reg, 4);
mdelay(FSI_LINK_ENABLE_SETUP_TIME);

3
drivers/fsi/fsi-master.h
View File

@ -130,7 +130,8 @@ struct fsi_master {
uint32_t addr, const void *val, size_t size);
int (*term)(struct fsi_master *, int link, uint8_t id);
int (*send_break)(struct fsi_master *, int link);
int (*link_enable)(struct fsi_master *, int link);
int (*link_enable)(struct fsi_master *, int link,
bool enable);
int (*link_config)(struct fsi_master *, int link,
u8 t_send_delay, u8 t_echo_delay);
};