remoteproc: pru: add support for configuring GPMUX based on client setup
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>
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fb2bdd32b2
Коммит
18cf4fcd7b
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@ -110,6 +110,7 @@ struct pru_private_data {
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* @dbg_single_step: debug state variable to set PRU into single step mode
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* @dbg_continuous: debug state variable to restore PRU execution mode
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* @evt_count: number of mapped events
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* @gpmux_save: saved value for gpmux config
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*/
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struct pru_rproc {
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int id;
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@ -128,6 +129,7 @@ struct pru_rproc {
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u32 dbg_single_step;
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u32 dbg_continuous;
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u8 evt_count;
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u8 gpmux_save;
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};
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static inline u32 pru_control_read_reg(struct pru_rproc *pru, unsigned int reg)
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@ -229,6 +231,7 @@ struct rproc *pru_rproc_get(struct device_node *np, int index,
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struct device *dev;
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const char *fw_name;
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int ret;
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u32 mux;
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rproc = __pru_rproc_get(np, index);
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if (IS_ERR(rproc))
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@ -253,6 +256,23 @@ struct rproc *pru_rproc_get(struct device_node *np, int index,
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if (pru_id)
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*pru_id = pru->id;
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ret = pruss_cfg_get_gpmux(pru->pruss, pru->id, &pru->gpmux_save);
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if (ret) {
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dev_err(dev, "failed to get cfg gpmux: %d\n", ret);
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goto err;
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}
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/* An error here is acceptable for backward compatibility */
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ret = of_property_read_u32_index(np, "ti,pruss-gp-mux-sel", index,
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&mux);
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if (!ret) {
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ret = pruss_cfg_set_gpmux(pru->pruss, pru->id, mux);
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if (ret) {
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dev_err(dev, "failed to set cfg gpmux: %d\n", ret);
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goto err;
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}
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}
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ret = of_property_read_string_index(np, "firmware-name", index,
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&fw_name);
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if (!ret) {
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@ -291,6 +311,8 @@ void pru_rproc_put(struct rproc *rproc)
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pru = rproc->priv;
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pruss_cfg_set_gpmux(pru->pruss, pru->id, pru->gpmux_save);
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pru_rproc_set_firmware(rproc, NULL);
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mutex_lock(&pru->lock);
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