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[09/10] mtd: spi-nor: aspeed: link controller with the ahb clock

Message ID 1491497808-25487-10-git-send-email-clg@kaod.org
State Rejected
Delegated to: Cyrille Pitchen
Headers show

Commit Message

Cédric Le Goater April 6, 2017, 4:56 p.m. UTC 
We will need the AHB frequency to set the HCLK settings in the SMC
controller to optimize the reads.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 drivers/mtd/spi-nor/aspeed-smc.c | 7 +++++++
 1 file changed, 7 insertions(+)
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Patch

diff --git a/drivers/mtd/spi-nor/aspeed-smc.c b/drivers/mtd/spi-nor/aspeed-smc.c
index 3c004dfaf873..1b398303f039 100644
--- a/drivers/mtd/spi-nor/aspeed-smc.c
+++ b/drivers/mtd/spi-nor/aspeed-smc.c
@@ -10,6 +10,7 @@ 
  */
 
 #include <linux/bug.h>
+#include <linux/clk.h>
 #include <linux/device.h>
 #include <linux/dma-direction.h>
 #include <linux/dma-mapping.h>
@@ -119,6 +120,8 @@  struct aspeed_smc_controller {
 	void __iomem *regs;			/* controller registers */
 	void __iomem *ahb_base;			/* per-chip windows resource */
 
+	struct clk *ahb_clk;
+
 	/* interrupt handling */
 	int irq;
 
@@ -1107,6 +1110,10 @@  static int aspeed_smc_probe(struct platform_device *pdev)
 	if (IS_ERR(controller->ahb_base))
 		return PTR_ERR(controller->ahb_base);
 
+	controller->ahb_clk = devm_clk_get(&pdev->dev, "ahb");
+	if (IS_ERR(controller->ahb_clk))
+		return PTR_ERR(controller->ahb_clk);
+
 	aspeed_smc_dma_setup(controller, pdev);
 
 	ret = aspeed_smc_setup_flash(controller, np, res);