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| author | Conor Dooley <conor.dooley@microchip.com> | 2023-10-20 15:18:40 +0200 |
|---|---|---|
| committer | Conor Dooley <conor.dooley@microchip.com> | 2023-12-06 13:06:18 +0100 |
| commit | 742aa6c563d29c367edbf0ef7236a7a853ed9be4 (patch) | |
| tree | 27d34bd5c6ee9c581a6aa527386e1928acaa2a04 /drivers/soc/microchip | |
| parent | dt-bindings: soc: microchip: add a property for system controller flash (diff) | |
| download | linux-742aa6c563d29c367edbf0ef7236a7a853ed9be4.tar.xz linux-742aa6c563d29c367edbf0ef7236a7a853ed9be4.zip | |
soc: microchip: mpfs: enable access to the system controller's flash
The system controller has a flash that contains images used to reprogram
the FPGA using IAP (In-Application Programming).
Introduce a function that allows a driver with a reference to the system
controller to get one to a flash device attached to it.
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Diffstat (limited to 'drivers/soc/microchip')
| -rw-r--r-- | drivers/soc/microchip/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/soc/microchip/mpfs-sys-controller.c | 20 |
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/soc/microchip/Kconfig b/drivers/soc/microchip/Kconfig index eb656b33156b..9b0fdd95276e 100644 --- a/drivers/soc/microchip/Kconfig +++ b/drivers/soc/microchip/Kconfig @@ -1,6 +1,7 @@ config POLARFIRE_SOC_SYS_CTRL tristate "POLARFIRE_SOC_SYS_CTRL" depends on POLARFIRE_SOC_MAILBOX + depends on MTD help This driver adds support for the PolarFire SoC (MPFS) system controller. diff --git a/drivers/soc/microchip/mpfs-sys-controller.c b/drivers/soc/microchip/mpfs-sys-controller.c index 0935e9e94172..c7e063993d92 100644 --- a/drivers/soc/microchip/mpfs-sys-controller.c +++ b/drivers/soc/microchip/mpfs-sys-controller.c @@ -12,6 +12,8 @@ #include <linux/kref.h> #include <linux/module.h> #include <linux/jiffies.h> +#include <linux/mtd/mtd.h> +#include <linux/spi/spi.h> #include <linux/interrupt.h> #include <linux/of.h> #include <linux/mailbox_client.h> @@ -30,6 +32,7 @@ struct mpfs_sys_controller { struct mbox_client client; struct mbox_chan *chan; struct completion c; + struct mtd_info *flash; struct kref consumers; }; @@ -99,6 +102,12 @@ static void mpfs_sys_controller_put(void *data) kref_put(&sys_controller->consumers, mpfs_sys_controller_delete); } +struct mtd_info *mpfs_sys_controller_get_flash(struct mpfs_sys_controller *mpfs_client) +{ + return mpfs_client->flash; +} +EXPORT_SYMBOL(mpfs_sys_controller_get_flash); + static struct platform_device subdevs[] = { { .name = "mpfs-rng", @@ -114,12 +123,23 @@ static int mpfs_sys_controller_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct mpfs_sys_controller *sys_controller; + struct device_node *np; int i, ret; sys_controller = kzalloc(sizeof(*sys_controller), GFP_KERNEL); if (!sys_controller) return -ENOMEM; + np = of_parse_phandle(dev->of_node, "microchip,bitstream-flash", 0); + if (!np) + goto no_flash; + + sys_controller->flash = of_get_mtd_device_by_node(np); + of_node_put(np); + if (IS_ERR(sys_controller->flash)) + return dev_err_probe(dev, PTR_ERR(sys_controller->flash), "Failed to get flash\n"); + +no_flash: sys_controller->client.dev = dev; sys_controller->client.rx_callback = mpfs_sys_controller_rx_callback; sys_controller->client.tx_block = 1U; |