openwrt/target/linux/lantiq/patches-3.2/0072-MIPS-lantiq-fix-spi-for-ase-update-for-clkdev-and-pl.patch

From d1cd860adbd87c42c90db1c5658cf10ed1dbdd3e Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Thu, 12 Apr 2012 13:25:42 +0200
Subject: [PATCH 72/73] MIPS: lantiq: fix spi for ase, update for clkdev and
 platform driver

irqs, gpios, chipselects
updated to use module_platform_driver()
clkdev is a bit hacky, using ltq_spi.0, as specifying no device numbering led to
the mtd driver not hooking up to an spi flash.

Signed-off-by: Conor O'Gorman <i@conorogorman.net>
---
 .../mips/include/asm/mach-lantiq/xway/lantiq_irq.h |    4 ++
 arch/mips/lantiq/xway/sysctrl.c                    |    2 +-
 drivers/spi/spi-xway.c                             |   58 ++++++++++----------
 3 files changed, 35 insertions(+), 29 deletions(-)

--- a/arch/mips/include/asm/mach-lantiq/xway/lantiq_irq.h
+++ b/arch/mips/include/asm/mach-lantiq/xway/lantiq_irq.h
@@ -30,6 +30,10 @@
 #define LTQ_SSC_TIR_AR9		(INT_NUM_IM0_IRL0 + 14)
 #define LTQ_SSC_RIR_AR9		(INT_NUM_IM0_IRL0 + 15)
 #define LTQ_SSC_EIR		(INT_NUM_IM0_IRL0 + 16)
+#define LTQ_SSC_RIR_ASE		(INT_NUM_IM0_IRL0 + 16)
+#define LTQ_SSC_TIR_ASE		(INT_NUM_IM0_IRL0 + 17)
+#define LTQ_SSC_EIR_ASE		(INT_NUM_IM0_IRL0 + 18)
+#define LTQ_SSC_FIR_ASE		(INT_NUM_IM0_IRL0 + 19)
 
 #define LTQ_MEI_DYING_GASP_INT	(INT_NUM_IM1_IRL0 + 21)
 #define LTQ_MEI_INT		(INT_NUM_IM1_IRL0 + 23)
--- a/arch/mips/lantiq/xway/sysctrl.c
+++ b/arch/mips/lantiq/xway/sysctrl.c
@@ -233,7 +233,7 @@ void __init ltq_soc_init(void)
 	clkdev_add_pmu("ltq_fpi", NULL, 0, PMU_FPI);
 	clkdev_add_pmu("ltq_dma", NULL, 0, PMU_DMA);
 	clkdev_add_pmu("ltq_stp", NULL, 0, PMU_STP);
-	clkdev_add_pmu("ltq_spi", NULL, 0, PMU_SPI);
+	clkdev_add_pmu("ltq_spi.0", NULL, 0, PMU_SPI);
         clkdev_add_pmu("ltq_gptu", NULL, 0, PMU_GPT);
         clkdev_add_pmu("ltq_ebu", NULL, 0, PMU_EBU);
 	if (!ltq_is_vr9())
--- a/drivers/spi/spi-xway.c
+++ b/drivers/spi/spi-xway.c
@@ -143,9 +143,9 @@
 #define LTQ_SPI_IRNEN_ALL	0xF
 
 /* Hard-wired GPIOs used by SPI controller */
-#define LTQ_SPI_GPIO_DI 	16
-#define LTQ_SPI_GPIO_DO		17
-#define LTQ_SPI_GPIO_CLK	18
+#define LTQ_SPI_GPIO_DI 	(ltq_is_ase()?  8 : 16)
+#define LTQ_SPI_GPIO_DO 	(ltq_is_ase()?  9 : 17)
+#define LTQ_SPI_GPIO_CLK	(ltq_is_ase()? 10 : 18)
 
 struct ltq_spi {
 	struct spi_bitbang	bitbang;
@@ -229,7 +229,7 @@ static void ltq_spi_hw_enable(struct ltq
 	u32 clc;
 
 	/* Power-up mdule */
-        clk_enable(hw->spiclk);
+	clk_enable(hw->spiclk);
 
 	/*
 	 * Set clock divider for run mode to 1 to
@@ -245,7 +245,7 @@ static void ltq_spi_hw_disable(struct lt
 	ltq_spi_reg_write(hw, LTQ_SPI_CLC_DISS, LTQ_SPI_CLC);
 
 	/* Power-down mdule */
-        clk_disable(hw->spiclk);
+	clk_disable(hw->spiclk);
 }
 
 static void ltq_spi_reset_fifos(struct ltq_spi *hw)
@@ -284,7 +284,7 @@ static inline int ltq_spi_wait_ready(str
 		cond_resched();
 	} while (!time_after_eq(jiffies, timeout));
 
-	dev_err(hw->dev, "SPI wait ready timed out\n");
+	dev_err(hw->dev, "SPI wait ready timed out stat: %x\n", stat);
 
 	return -ETIMEDOUT;
 }
@@ -556,6 +556,12 @@ static const struct ltq_spi_cs_gpio_map
 	{ 11, 3 },
 };
 
+static const struct ltq_spi_cs_gpio_map ltq_spi_cs_ase[] = {
+	{  7, 2 },
+	{ 15, 1 },
+	{ 14, 1 },
+};
+
 static int ltq_spi_setup(struct spi_device *spi)
 {
 	struct ltq_spi *hw = ltq_spi_to_hw(spi);
@@ -600,8 +606,10 @@ static int ltq_spi_setup(struct spi_devi
 		cstate->cs_activate = ltq_spi_gpio_cs_activate;
 		cstate->cs_deactivate = ltq_spi_gpio_cs_deactivate;
 	} else {
-		ret = ltq_gpio_request(&spi->dev, ltq_spi_cs[spi->chip_select].gpio,
-				ltq_spi_cs[spi->chip_select].mux,
+		struct ltq_spi_cs_gpio_map *cs_map =
+				ltq_is_ase() ? ltq_spi_cs_ase : ltq_spi_cs;
+		ret = ltq_gpio_request(&spi->dev, cs_map[spi->chip_select].gpio,
+				cs_map[spi->chip_select].mux,
 				1, "spi-cs");
 		if (ret)
 			return -EBUSY;
@@ -633,7 +641,8 @@ static void ltq_spi_cleanup(struct spi_d
 	if (cdata && cdata->gpio)
 		gpio = cdata->gpio;
 	else
-		gpio = ltq_spi_cs[spi->chip_select].gpio;
+		gpio = ltq_is_ase() ? ltq_spi_cs_ase[spi->chip_select].gpio :
+					 ltq_spi_cs[spi->chip_select].gpio;
 
 	gpio_free(gpio);
 	kfree(cstate);
@@ -868,7 +877,8 @@ static const struct ltq_spi_irq_map ltq_
 	{ "spi_err", ltq_spi_err_irq },
 };
 
-static int __init ltq_spi_probe(struct platform_device *pdev)
+static int __devinit
+ltq_spi_probe(struct platform_device *pdev)
 {
 	struct spi_master *master;
 	struct resource *r;
@@ -910,14 +920,14 @@ static int __init ltq_spi_probe(struct p
 
 	hw->fpiclk = clk_get_fpi();
 	if (IS_ERR(hw->fpiclk)) {
-		dev_err(&pdev->dev, "clk_get\n");
+		dev_err(&pdev->dev, "fpi clk\n");
 		ret = PTR_ERR(hw->fpiclk);
 		goto err_master;
 	}
 
 	hw->spiclk = clk_get(&pdev->dev, NULL);
 	if (IS_ERR(hw->spiclk)) {
-		dev_err(&pdev->dev, "clk_get\n");
+		dev_err(&pdev->dev, "spi clk\n");
 		ret = PTR_ERR(hw->spiclk);
 		goto err_master;
 	}
@@ -1014,7 +1024,8 @@ err:
 	return ret;
 }
 
-static int __exit ltq_spi_remove(struct platform_device *pdev)
+static int __devexit
+ltq_spi_remove(struct platform_device *pdev)
 {
 	struct ltq_spi *hw = platform_get_drvdata(pdev);
 	int ret, i;
@@ -1043,24 +1054,15 @@ static int __exit ltq_spi_remove(struct
 }
 
 static struct platform_driver ltq_spi_driver = {
+	.probe = ltq_spi_probe,
+	.remove = __devexit_p(ltq_spi_remove),
 	.driver = {
-		   .name = "ltq_spi",
-		   .owner = THIS_MODULE,
-		   },
-	.remove = __exit_p(ltq_spi_remove),
+		.name = "ltq_spi",
+		.owner = THIS_MODULE,
+		},
 };
 
-static int __init ltq_spi_init(void)
-{
-	return platform_driver_probe(&ltq_spi_driver, ltq_spi_probe);
-}
-module_init(ltq_spi_init);
-
-static void __exit ltq_spi_exit(void)
-{
-	platform_driver_unregister(&ltq_spi_driver);
-}
-module_exit(ltq_spi_exit);
+module_platform_driver(ltq_spi_driver);
 
 MODULE_DESCRIPTION("Lantiq SoC SPI controller driver");
 MODULE_AUTHOR("Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>");