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authorSuman Anna <s-anna@ti.com>2020-01-23 20:13:24 -0600
committerGrzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>2020-12-21 23:25:41 +0100
commit2ff2f48a8f789ea53158d973d101280d8a000b37 (patch)
tree1bd1183e9b37bfc6b3645ca1c8fd3b15f0a14ec5
parent9877ac8fa05ed6fe71572720408026ea12c38d6c (diff)
downloadlinux-2ff2f48a8f789ea53158d973d101280d8a000b37.tar.gz
soc: ti: pruss: Add helper functions to set GPI mode, MII_RT_event and XFR
The PRUSS CFG module is represented as a syscon node and is currently managed by the PRUSS platform driver. Add easy accessor functions to set GPI mode, MII_RT event enable/disable and XFR (XIN XOUT) enable/disable to enable the PRUSS Ethernet usecase. These functions reuse the generic pruss_cfg_update() API function. Signed-off-by: Suman Anna <s-anna@ti.com> Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org> Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
-rw-r--r--include/linux/pruss.h55
1 files changed, 55 insertions, 0 deletions
diff --git a/include/linux/pruss.h b/include/linux/pruss.h
index 9cef536c6cb5..c8d73cc6baa9 100644
--- a/include/linux/pruss.h
+++ b/include/linux/pruss.h
@@ -235,4 +235,59 @@ static inline bool is_pru_rproc(struct device *dev)
return true;
}
+/**
+ * pruss_cfg_gpimode() - set the GPI mode of the PRU
+ * @pruss: the pruss instance handle
+ * @pru_id: id of the PRU core within the PRUSS
+ * @mode: GPI mode to set
+ *
+ * Sets the GPI mode for a given PRU by programming the
+ * corresponding PRUSS_CFG_GPCFGx register
+ *
+ * Return: 0 on success, or an error code otherwise
+ */
+static inline int pruss_cfg_gpimode(struct pruss *pruss,
+ enum pruss_pru_id pru_id,
+ enum pruss_gpi_mode mode)
+{
+ if (pru_id < 0 || pru_id >= PRUSS_NUM_PRUS)
+ return -EINVAL;
+
+ return pruss_cfg_update(pruss, PRUSS_CFG_GPCFG(pru_id),
+ PRUSS_GPCFG_PRU_GPI_MODE_MASK,
+ mode << PRUSS_GPCFG_PRU_GPI_MODE_SHIFT);
+}
+
+/**
+ * pruss_cfg_miirt_enable() - Enable/disable MII RT Events
+ * @pruss: the pruss instance
+ * @enable: enable/disable
+ *
+ * Enable/disable the MII RT Events for the PRUSS.
+ *
+ * Return: 0 on success, or an error code otherwise
+ */
+static inline int pruss_cfg_miirt_enable(struct pruss *pruss, bool enable)
+{
+ u32 set = enable ? PRUSS_MII_RT_EVENT_EN : 0;
+
+ return pruss_cfg_update(pruss, PRUSS_CFG_MII_RT,
+ PRUSS_MII_RT_EVENT_EN, set);
+}
+
+/**
+ * pruss_cfg_xfr_enable() - Enable/disable XIN XOUT shift functionality
+ * @pruss: the pruss instance
+ * @enable: enable/disable
+ *
+ * Return: 0 on success, or an error code otherwise
+ */
+static inline int pruss_cfg_xfr_enable(struct pruss *pruss, bool enable)
+{
+ u32 set = enable ? PRUSS_SPP_XFER_SHIFT_EN : 0;
+
+ return pruss_cfg_update(pruss, PRUSS_CFG_SPP,
+ PRUSS_SPP_XFER_SHIFT_EN, set);
+}
+
#endif /* __LINUX_PRUSS_H */