pinctrl: rockchip: base regmap supplied by a syscon
From: Heiko Stuebner <heiko@...> Date: Tue, 29 Apr 2014 10:45:55 +0200
Commit-Message
This allows the basic registers of the general register files to be supplied by a syscon instead of being mapped locally. The GRF registers contain a lot more than pinctrl functions like dma, usb-phy and general soc control and status registers, intermixed with the iomux, pull and drive-strength registers. Signed-off-by: Heiko Stuebner <heiko@...>
Patch-Comment
drivers/pinctrl/pinctrl-rockchip.c | 47 +++++++++++++++++++++++--------------- 1 file changed, 28 insertions(+), 19 deletions(-)
Statistics
- 28 lines added
- 19 lines removed
Changes
---------------------- drivers/pinctrl/pinctrl-rockchip.c ----------------------
index d6e2401..bb805d5 100644
@@ -1574,30 +1574,39 @@ static int rockchip_pinctrl_probe(struct platform_device *pdev)
}
info->ctrl = ctrl;
+ node = of_parse_phandle(np, "rockchip,grf", 0);
+ if (node) {
+ info->regmap_base = syscon_node_to_regmap(node);
+ if (IS_ERR(info->regmap_base))
+ return PTR_ERR(info->regmap_base);
+ } else {
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(base))
return PTR_ERR(base);
rockchip_regmap_config.max_register = resource_size(res) - 4;
+ rockchip_regmap_config.name = "rockchip,pinctrl";
+ info->regmap_base = devm_regmap_init_mmio(&pdev->dev, base,
+ &rockchip_regmap_config);
+
+ /* to check for the old dt-bindings */
+ info->reg_size = resource_size(res);
+
+ /* Honor the old binding, with pull registers as 2nd resource */
+ if (ctrl->type == RK3188 && info->reg_size < 0x200) {
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ rockchip_regmap_config.max_register =
+ resource_size(res) - 4;
+ rockchip_regmap_config.name = "rockchip,pinctrl-pull";
+ info->regmap_pull = devm_regmap_init_mmio(&pdev->dev,
+ base,
+ &rockchip_regmap_config);
+ }
}
/* try to find the optional reference to the pmu syscon */