diff options
| author | Roy Pledge <roy.pledge@nxp.com> | 2018-12-10 17:50:17 +0100 |
|---|---|---|
| committer | Li Yang <leoyang.li@nxp.com> | 2019-01-11 22:06:54 +0100 |
| commit | 11c8bac9b3877fb8d8b4674f4744c1b5937956ba (patch) | |
| tree | 356decf725fffb72f8f58a8de624b49a55254ac7 /drivers/soc/fsl | |
| parent | soc: fsl: dpio: use a cpumask to identify which cpus are unused (diff) | |
| download | linux-11c8bac9b3877fb8d8b4674f4744c1b5937956ba.tar.xz linux-11c8bac9b3877fb8d8b4674f4744c1b5937956ba.zip | |
soc: fsl: dpio: perform DPIO Reset on Probe
Invoke a DPIO reset command when a DPIO device is probed. This
will ensure the QBMan portal is in the state the driver expects.
Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
Signed-off-by: Li Yang <leoyang.li@nxp.com>
Diffstat (limited to 'drivers/soc/fsl')
| -rw-r--r-- | drivers/soc/fsl/dpio/dpio-cmd.h | 1 | ||||
| -rw-r--r-- | drivers/soc/fsl/dpio/dpio-driver.c | 7 | ||||
| -rw-r--r-- | drivers/soc/fsl/dpio/dpio.c | 23 | ||||
| -rw-r--r-- | drivers/soc/fsl/dpio/dpio.h | 4 |
4 files changed, 35 insertions, 0 deletions
diff --git a/drivers/soc/fsl/dpio/dpio-cmd.h b/drivers/soc/fsl/dpio/dpio-cmd.h index ab8f82ee7ee5..5814d2f395a4 100644 --- a/drivers/soc/fsl/dpio/dpio-cmd.h +++ b/drivers/soc/fsl/dpio/dpio-cmd.h @@ -25,6 +25,7 @@ #define DPIO_CMDID_ENABLE DPIO_CMD(0x002) #define DPIO_CMDID_DISABLE DPIO_CMD(0x003) #define DPIO_CMDID_GET_ATTR DPIO_CMD(0x004) +#define DPIO_CMDID_RESET DPIO_CMD(0x005) struct dpio_cmd_open { __le32 dpio_id; diff --git a/drivers/soc/fsl/dpio/dpio-driver.c b/drivers/soc/fsl/dpio/dpio-driver.c index 832175cac739..38ee9dba1c96 100644 --- a/drivers/soc/fsl/dpio/dpio-driver.c +++ b/drivers/soc/fsl/dpio/dpio-driver.c @@ -110,6 +110,12 @@ static int dpaa2_dpio_probe(struct fsl_mc_device *dpio_dev) goto err_open; } + err = dpio_reset(dpio_dev->mc_io, 0, dpio_dev->mc_handle); + if (err) { + dev_err(dev, "dpio_reset() failed\n"); + goto err_reset; + } + err = dpio_get_attributes(dpio_dev->mc_io, 0, dpio_dev->mc_handle, &dpio_attrs); if (err) { @@ -192,6 +198,7 @@ err_register_dpio_irq: err_allocate_irqs: dpio_disable(dpio_dev->mc_io, 0, dpio_dev->mc_handle); err_get_attr: +err_reset: dpio_close(dpio_dev->mc_io, 0, dpio_dev->mc_handle); err_open: fsl_mc_portal_free(dpio_dev->mc_io); diff --git a/drivers/soc/fsl/dpio/dpio.c b/drivers/soc/fsl/dpio/dpio.c index ff37c80e11a0..521bc6946317 100644 --- a/drivers/soc/fsl/dpio/dpio.c +++ b/drivers/soc/fsl/dpio/dpio.c @@ -196,3 +196,26 @@ int dpio_get_api_version(struct fsl_mc_io *mc_io, return 0; } + +/** + * dpio_reset() - Reset the DPIO, returns the object to initial state. + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPIO object + * + * Return: '0' on Success; Error code otherwise. + */ +int dpio_reset(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token) +{ + struct fsl_mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPIO_CMDID_RESET, + cmd_flags, + token); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} diff --git a/drivers/soc/fsl/dpio/dpio.h b/drivers/soc/fsl/dpio/dpio.h index 49194c8e45f1..b2ac4ba4fb8e 100644 --- a/drivers/soc/fsl/dpio/dpio.h +++ b/drivers/soc/fsl/dpio/dpio.h @@ -80,4 +80,8 @@ int dpio_get_api_version(struct fsl_mc_io *mc_io, u16 *major_ver, u16 *minor_ver); +int dpio_reset(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token); + #endif /* __FSL_DPIO_H */ |