spi: dw: add reset control (7830c0ef) · Commits · 戴 / test

drivers/spi/spi-dw-mmio.c

+13 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@
		#include <linux/acpi.h>
		#include <linux/property.h>
		#include <linux/regmap.h>
		#include <linux/reset.h>

		#include "spi-dw.h"

		@@ -29,6 +30,7 @@ struct dw_spi_mmio {
		struct clk *clk;
		struct clk *pclk;
		void *priv;
		struct reset_control *rstc;
		};

		#define MSCC_CPU_SYSTEM_CTRL_GENERAL_CTRL 0x24
		@@ -224,6 +226,14 @@ static int dw_spi_mmio_probe(struct platform_device *pdev)
		if (ret)
		goto out_clk;

		/* find an optional reset controller */
		dwsmmio->rstc = devm_reset_control_get_optional_exclusive(&pdev->dev, "spi");
		if (IS_ERR(dwsmmio->rstc)) {
		ret = PTR_ERR(dwsmmio->rstc);
		goto out_clk;
		}
		reset_control_deassert(dwsmmio->rstc);

		dws->bus_num = pdev->id;

		dws->max_freq = clk_get_rate(dwsmmio->clk);
		@@ -257,6 +267,8 @@ out:
		clk_disable_unprepare(dwsmmio->pclk);
		out_clk:
		clk_disable_unprepare(dwsmmio->clk);
		reset_control_assert(dwsmmio->rstc);

		return ret;
		}

		@@ -268,6 +280,7 @@ static int dw_spi_mmio_remove(struct platform_device *pdev)
		pm_runtime_disable(&pdev->dev);
		clk_disable_unprepare(dwsmmio->pclk);
		clk_disable_unprepare(dwsmmio->clk);
		reset_control_assert(dwsmmio->rstc);

		return 0;
		}