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openwrt-xburst/target/linux/lantiq/patches-3.2/0072-MIPS-lantiq-fix-spi-for-ase-update-for-clkdev-and-pl.patch
jogo d1f448b466 kernel: update linux 3.2 to 3.2.15 
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31335 3c298f89-4303-0410-b956-a3cf2f4a3e73
2012-04-17 12:50:54 +00:00

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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>");
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