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remoteproc: pru: add support for configuring GPMUX based on client setup

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The GPMUX config value for a PRU device can now be configured by client
by specifying it in the device node ti,pruss-gp-mux-sel.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Link: https://lore.kernel.org/r/20230802064925.1895750-1-danishanwar@ti.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
This commit is contained in:
Tero Kristo 2023-08-02 12:19:25 +05:30 committed by Mathieu Poirier
parent fb2bdd32b2
commit 18cf4fcd7b
1 changed files with 22 additions and 0 deletions
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22
drivers/remoteproc/pru_rproc.c
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@ -110,6 +110,7 @@ struct pru_private_data {
* @dbg_single_step: debug state variable to set PRU into single step mode
* @dbg_continuous: debug state variable to restore PRU execution mode
* @evt_count: number of mapped events
* @gpmux_save: saved value for gpmux config
*/
struct pru_rproc {
int id;
@ -128,6 +129,7 @@ struct pru_rproc {
u32 dbg_single_step;
u32 dbg_continuous;
u8 evt_count;
u8 gpmux_save;
};
static inline u32 pru_control_read_reg(struct pru_rproc *pru, unsigned int reg)
@ -229,6 +231,7 @@ struct rproc *pru_rproc_get(struct device_node *np, int index,
struct device *dev;
const char *fw_name;
int ret;
u32 mux;
rproc = __pru_rproc_get(np, index);
if (IS_ERR(rproc))
@ -253,6 +256,23 @@ struct rproc *pru_rproc_get(struct device_node *np, int index,
if (pru_id)
*pru_id = pru->id;
ret = pruss_cfg_get_gpmux(pru->pruss, pru->id, &pru->gpmux_save);
if (ret) {
dev_err(dev, "failed to get cfg gpmux: %d\n", ret);
goto err;
}
/* An error here is acceptable for backward compatibility */
ret = of_property_read_u32_index(np, "ti,pruss-gp-mux-sel", index,
&mux);
if (!ret) {
ret = pruss_cfg_set_gpmux(pru->pruss, pru->id, mux);
if (ret) {
dev_err(dev, "failed to set cfg gpmux: %d\n", ret);
goto err;
}
}
ret = of_property_read_string_index(np, "firmware-name", index,
&fw_name);
if (!ret) {
@ -291,6 +311,8 @@ void pru_rproc_put(struct rproc *rproc)
pru = rproc->priv;
pruss_cfg_set_gpmux(pru->pruss, pru->id, pru->gpmux_save);
pru_rproc_set_firmware(rproc, NULL);
mutex_lock(&pru->lock);