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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This patch adds afi ioctl to support dynamic PS-PL bus width settings. Signed-off-by: Nava kishore Manne --- drivers/firmware/xilinx/zynqmp.c | 13 +++++++++++++ include/linux/firmware/xlnx-zynqmp.h | 7 +++++++ 2 files changed, 20 insertions(+) diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c index 7eb9958662dd..ada9eb9e26e3 100644 --- a/drivers/firmware/xilinx/zynqmp.c +++ b/drivers/firmware/xilinx/zynqmp.c @@ -713,6 +713,19 @@ int zynqmp_pm_read_pggs(u32 index, u32 *value) } EXPORT_SYMBOL_GPL(zynqmp_pm_read_pggs); +/** + * zynqmp_pm_afi() - PM API for setting the PS-PL bus width + * @index: Register index value + * @value: value to be written into the register + * + * Return: Returns status, either success or error+reason + */ +int zynqmp_pm_afi(u32 index, u32 value) +{ + return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_AFI, index, value, NULL); +} +EXPORT_SYMBOL_GPL(zynqmp_pm_afi); + /** * zynqmp_pm_set_boot_health_status() - PM API for setting healthy boot status * @value: Status value to be written diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h index 71177b17eee5..792fb4f5d86f 100644 --- a/include/linux/firmware/xlnx-zynqmp.h +++ b/include/linux/firmware/xlnx-zynqmp.h @@ -113,6 +113,7 @@ enum pm_ioctl_id { IOCTL_READ_PGGS = 15, /* Set healthy bit value */ IOCTL_SET_BOOT_HEALTH_STATUS = 17, + IOCTL_AFI = 18, }; enum pm_query_id { @@ -353,6 +354,7 @@ int zynqmp_pm_write_pggs(u32 index, u32 value); int zynqmp_pm_read_pggs(u32 index, u32 *value); int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype); int zynqmp_pm_set_boot_health_status(u32 value); +int zynqmp_pm_afi(u32 index, u32 value); #else static inline struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void) { @@ -537,6 +539,11 @@ static inline int zynqmp_pm_set_boot_health_status(u32 value) { return -ENODEV; } + +static inline int zynqmp_pm_afi(u32 index, u32 value) +{ + return -ENODEV; +} #endif #endif /* __FIRMWARE_ZYNQMP_H__ */