* [PATCH 2/3] spi: clps711x: Add devicetree support
[not found] ` <1411196710-4961-1-git-send-email-shc_work-JGs/UdohzUI@public.gmane.org>
@ 2014-09-20 7:05 ` Alexander Shiyan
2014-09-24 8:40 ` [PATCH 1/3] spi: clps711x: Migrate to the new clk subsystem Mark Brown
1 sibling, 0 replies; 3+ messages in thread
From: Alexander Shiyan @ 2014-09-20 7:05 UTC (permalink / raw)
To: linux-spi-u79uwXL29TY76Z2rM5mHXA; +Cc: Mark Brown, Alexander Shiyan
This patch adds devicetree support for the clps711x-spi driver and
completely removes the non-DT support.
This change is safe, because the current kernel code does not have
a users of this driver.
Signed-off-by: Alexander Shiyan <shc_work-JGs/UdohzUI@public.gmane.org>
---
drivers/spi/spi-clps711x.c | 61 ++++++++++--------------------
include/linux/platform_data/spi-clps711x.h | 21 ----------
2 files changed, 20 insertions(+), 62 deletions(-)
delete mode 100644 include/linux/platform_data/spi-clps711x.h
diff --git a/drivers/spi/spi-clps711x.c b/drivers/spi/spi-clps711x.c
index 181cf22..355a6cc 100644
--- a/drivers/spi/spi-clps711x.c
+++ b/drivers/spi/spi-clps711x.c
@@ -12,7 +12,6 @@
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/gpio.h>
-#include <linux/delay.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
@@ -20,9 +19,8 @@
#include <linux/mfd/syscon.h>
#include <linux/mfd/syscon/clps711x.h>
#include <linux/spi/spi.h>
-#include <linux/platform_data/spi-clps711x.h>
-#define DRIVER_NAME "spi-clps711x"
+#define DRIVER_NAME "clps711x-spi"
#define SYNCIO_FRMLEN(x) ((x) << 8)
#define SYNCIO_TXFRMEN (1 << 14)
@@ -104,21 +102,10 @@ static irqreturn_t spi_clps711x_isr(int irq, void *dev_id)
static int spi_clps711x_probe(struct platform_device *pdev)
{
struct spi_clps711x_data *hw;
- struct spi_clps711x_pdata *pdata = dev_get_platdata(&pdev->dev);
struct spi_master *master;
struct resource *res;
int i, irq, ret;
- if (!pdata) {
- dev_err(&pdev->dev, "No platform data supplied\n");
- return -EINVAL;
- }
-
- if (pdata->num_chipselect < 1) {
- dev_err(&pdev->dev, "At least one CS must be defined\n");
- return -EINVAL;
- }
-
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
@@ -127,40 +114,24 @@ static int spi_clps711x_probe(struct platform_device *pdev)
if (!master)
return -ENOMEM;
- master->cs_gpios = devm_kzalloc(&pdev->dev, sizeof(int) *
- pdata->num_chipselect, GFP_KERNEL);
- if (!master->cs_gpios) {
- ret = -ENOMEM;
- goto err_out;
- }
-
- master->bus_num = pdev->id;
+ master->bus_num = -1;
master->mode_bits = SPI_CPHA | SPI_CS_HIGH;
master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 8);
- master->num_chipselect = pdata->num_chipselect;
+ master->dev.of_node = pdev->dev.of_node;
master->setup = spi_clps711x_setup;
master->prepare_message = spi_clps711x_prepare_message;
master->transfer_one = spi_clps711x_transfer_one;
hw = spi_master_get_devdata(master);
- for (i = 0; i < master->num_chipselect; i++) {
- master->cs_gpios[i] = pdata->chipselect[i];
- ret = devm_gpio_request(&pdev->dev, master->cs_gpios[i],
- DRIVER_NAME);
- if (ret) {
- dev_err(&pdev->dev, "Can't get CS GPIO %i\n", i);
- goto err_out;
- }
- }
-
hw->spi_clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(hw->spi_clk)) {
ret = PTR_ERR(hw->spi_clk);
goto err_out;
}
- hw->syscon = syscon_regmap_lookup_by_pdevname("syscon.3");
+ hw->syscon =
+ syscon_regmap_lookup_by_compatible("cirrus,clps711x-syscon3");
if (IS_ERR(hw->syscon)) {
ret = PTR_ERR(hw->syscon);
goto err_out;
@@ -185,14 +156,15 @@ static int spi_clps711x_probe(struct platform_device *pdev)
goto err_out;
ret = devm_spi_register_master(&pdev->dev, master);
- if (!ret) {
- dev_info(&pdev->dev,
- "SPI bus driver initialized. Master clock %u Hz\n",
- master->max_speed_hz);
- return 0;
- }
+ if (ret)
+ goto err_out;
- dev_err(&pdev->dev, "Failed to register master\n");
+ for (i = 0; i < master->num_chipselect; i++) {
+ ret = devm_gpio_request(&pdev->dev, master->cs_gpios[i],
+ dev_name(&pdev->dev));
+ if (ret)
+ goto err_out;
+ }
err_out:
spi_master_put(master);
@@ -200,10 +172,17 @@ err_out:
return ret;
}
+static const struct of_device_id clps711x_spi_dt_ids[] = {
+ { .compatible = "cirrus,clps711x-spi", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, clps711x_spi_dt_ids);
+
static struct platform_driver clps711x_spi_driver = {
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
+ .of_match_table = clps711x_spi_dt_ids,
},
.probe = spi_clps711x_probe,
};
diff --git a/include/linux/platform_data/spi-clps711x.h b/include/linux/platform_data/spi-clps711x.h
deleted file mode 100644
index 301956e..0000000
--- a/include/linux/platform_data/spi-clps711x.h
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- * CLPS711X SPI bus driver definitions
- *
- * Copyright (C) 2012 Alexander Shiyan <shc_work-JGs/UdohzUI@public.gmane.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef ____LINUX_PLATFORM_DATA_SPI_CLPS711X_H
-#define ____LINUX_PLATFORM_DATA_SPI_CLPS711X_H
-
-/* Board specific platform_data */
-struct spi_clps711x_pdata {
- int *chipselect; /* Array of GPIO-numbers */
- int num_chipselect; /* Total count of GPIOs */
-};
-
-#endif
--
1.8.5.5
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