diff options
author | Andrew Lunn <andrew@lunn.ch> | 2012-04-06 17:17:26 +0200 |
---|---|---|
committer | Mike Turquette <mturquette@linaro.org> | 2012-05-08 16:33:55 -0700 |
commit | 4574b886698dfad6209102fed6136622b5fe1c21 (patch) | |
tree | 2f1deee540c68261f4531d09337a19a130a7ea45 | |
parent | 2f129bf4aab684bef1e82e747b709a5025ecb698 (diff) | |
download | op-kernel-dev-4574b886698dfad6209102fed6136622b5fe1c21.zip op-kernel-dev-4574b886698dfad6209102fed6136622b5fe1c21.tar.gz |
ARM: Orion: SPI: Add clk/clkdev support.
Remove now redundant tclk from SPI platform data. This makes the platform
data empty, so remove it.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Jamie Lentin <jm@lentin.co.uk>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
-rw-r--r-- | arch/arm/mach-dove/common.c | 6 | ||||
-rw-r--r-- | arch/arm/mach-dove/dove-db-setup.c | 1 | ||||
-rw-r--r-- | arch/arm/mach-kirkwood/board-dreamplug.c | 1 | ||||
-rw-r--r-- | arch/arm/mach-kirkwood/common.c | 10 | ||||
-rw-r--r-- | arch/arm/mach-kirkwood/mv88f6281gtw_ge-setup.c | 1 | ||||
-rw-r--r-- | arch/arm/mach-kirkwood/rd88f6192-nas-setup.c | 1 | ||||
-rw-r--r-- | arch/arm/mach-kirkwood/t5325-setup.c | 1 | ||||
-rw-r--r-- | arch/arm/mach-kirkwood/tsx1x-common.c | 1 | ||||
-rw-r--r-- | arch/arm/mach-mv78xx0/common.c | 2 | ||||
-rw-r--r-- | arch/arm/mach-orion5x/common.c | 4 | ||||
-rw-r--r-- | arch/arm/mach-orion5x/rd88f6183ap-ge-setup.c | 1 | ||||
-rw-r--r-- | arch/arm/plat-orion/common.c | 38 | ||||
-rw-r--r-- | arch/arm/plat-orion/include/plat/common.h | 11 | ||||
-rw-r--r-- | drivers/spi/spi-orion.c | 30 | ||||
-rw-r--r-- | include/linux/spi/orion_spi.h | 17 |
15 files changed, 70 insertions, 55 deletions
diff --git a/arch/arm/mach-dove/common.c b/arch/arm/mach-dove/common.c index 63fe6e6..da5b404 100644 --- a/arch/arm/mach-dove/common.c +++ b/arch/arm/mach-dove/common.c @@ -76,6 +76,8 @@ static void __init clk_init(void) { tclk = clk_register_fixed_rate(NULL, "tclk", NULL, CLK_IS_ROOT, get_tclk()); + + orion_clkdev_init(tclk); } /***************************************************************************** @@ -162,12 +164,12 @@ void __init dove_uart3_init(void) ****************************************************************************/ void __init dove_spi0_init(void) { - orion_spi_init(DOVE_SPI0_PHYS_BASE, get_tclk()); + orion_spi_init(DOVE_SPI0_PHYS_BASE); } void __init dove_spi1_init(void) { - orion_spi_1_init(DOVE_SPI1_PHYS_BASE, get_tclk()); + orion_spi_1_init(DOVE_SPI1_PHYS_BASE); } /***************************************************************************** diff --git a/arch/arm/mach-dove/dove-db-setup.c b/arch/arm/mach-dove/dove-db-setup.c index ea77ae4..bc2867f 100644 --- a/arch/arm/mach-dove/dove-db-setup.c +++ b/arch/arm/mach-dove/dove-db-setup.c @@ -20,7 +20,6 @@ #include <linux/i2c.h> #include <linux/pci.h> #include <linux/spi/spi.h> -#include <linux/spi/orion_spi.h> #include <linux/spi/flash.h> #include <linux/gpio.h> #include <asm/mach-types.h> diff --git a/arch/arm/mach-kirkwood/board-dreamplug.c b/arch/arm/mach-kirkwood/board-dreamplug.c index 9854539..55e357a 100644 --- a/arch/arm/mach-kirkwood/board-dreamplug.c +++ b/arch/arm/mach-kirkwood/board-dreamplug.c @@ -27,7 +27,6 @@ #include <linux/mtd/physmap.h> #include <linux/spi/flash.h> #include <linux/spi/spi.h> -#include <linux/spi/orion_spi.h> #include <asm/mach-types.h> #include <asm/mach/arch.h> #include <asm/mach/map.h> diff --git a/arch/arm/mach-kirkwood/common.c b/arch/arm/mach-kirkwood/common.c index 57b8d1e..476e0b9 100644 --- a/arch/arm/mach-kirkwood/common.c +++ b/arch/arm/mach-kirkwood/common.c @@ -86,10 +86,12 @@ static struct clk __init *kirkwood_register_gate(const char *name, u8 bit_idx) void __init kirkwood_clk_init(void) { + struct clk *runit; + tclk = clk_register_fixed_rate(NULL, "tclk", NULL, CLK_IS_ROOT, kirkwood_tclk); - kirkwood_register_gate("runit", CGC_BIT_RUNIT); + runit = kirkwood_register_gate("runit", CGC_BIT_RUNIT); kirkwood_register_gate("ge0", CGC_BIT_GE0); kirkwood_register_gate("ge1", CGC_BIT_GE1); kirkwood_register_gate("sata0", CGC_BIT_SATA0); @@ -104,6 +106,10 @@ void __init kirkwood_clk_init(void) kirkwood_register_gate("audio", CGC_BIT_AUDIO); kirkwood_register_gate("tdm", CGC_BIT_TDM); kirkwood_register_gate("tsu", CGC_BIT_TSU); + + /* clkdev entries, mapping clks to devices */ + orion_clkdev_add(NULL, "orion_spi.0", runit); + orion_clkdev_add(NULL, "orion_spi.1", runit); } /***************************************************************************** @@ -270,7 +276,7 @@ void __init kirkwood_sdio_init(struct mvsdio_platform_data *mvsdio_data) void __init kirkwood_spi_init() { kirkwood_clk_ctrl |= CGC_RUNIT; - orion_spi_init(SPI_PHYS_BASE, kirkwood_tclk); + orion_spi_init(SPI_PHYS_BASE); } diff --git a/arch/arm/mach-kirkwood/mv88f6281gtw_ge-setup.c b/arch/arm/mach-kirkwood/mv88f6281gtw_ge-setup.c index 85f6169..6d8364a 100644 --- a/arch/arm/mach-kirkwood/mv88f6281gtw_ge-setup.c +++ b/arch/arm/mach-kirkwood/mv88f6281gtw_ge-setup.c @@ -23,7 +23,6 @@ #include <linux/gpio_keys.h> #include <linux/spi/flash.h> #include <linux/spi/spi.h> -#include <linux/spi/orion_spi.h> #include <net/dsa.h> #include <asm/mach-types.h> #include <asm/mach/arch.h> diff --git a/arch/arm/mach-kirkwood/rd88f6192-nas-setup.c b/arch/arm/mach-kirkwood/rd88f6192-nas-setup.c index fd2c9c8..f742a66 100644 --- a/arch/arm/mach-kirkwood/rd88f6192-nas-setup.c +++ b/arch/arm/mach-kirkwood/rd88f6192-nas-setup.c @@ -16,7 +16,6 @@ #include <linux/gpio.h> #include <linux/spi/flash.h> #include <linux/spi/spi.h> -#include <linux/spi/orion_spi.h> #include <asm/mach-types.h> #include <asm/mach/arch.h> #include <mach/kirkwood.h> diff --git a/arch/arm/mach-kirkwood/t5325-setup.c b/arch/arm/mach-kirkwood/t5325-setup.c index f9d2a11..bad738e 100644 --- a/arch/arm/mach-kirkwood/t5325-setup.c +++ b/arch/arm/mach-kirkwood/t5325-setup.c @@ -16,7 +16,6 @@ #include <linux/mtd/physmap.h> #include <linux/spi/flash.h> #include <linux/spi/spi.h> -#include <linux/spi/orion_spi.h> #include <linux/i2c.h> #include <linux/mv643xx_eth.h> #include <linux/ata_platform.h> diff --git a/arch/arm/mach-kirkwood/tsx1x-common.c b/arch/arm/mach-kirkwood/tsx1x-common.c index 24294b2..8943ede 100644 --- a/arch/arm/mach-kirkwood/tsx1x-common.c +++ b/arch/arm/mach-kirkwood/tsx1x-common.c @@ -4,7 +4,6 @@ #include <linux/mtd/physmap.h> #include <linux/spi/flash.h> #include <linux/spi/spi.h> -#include <linux/spi/orion_spi.h> #include <linux/serial_reg.h> #include <mach/kirkwood.h> #include "common.h" diff --git a/arch/arm/mach-mv78xx0/common.c b/arch/arm/mach-mv78xx0/common.c index 7373320..4c24b46 100644 --- a/arch/arm/mach-mv78xx0/common.c +++ b/arch/arm/mach-mv78xx0/common.c @@ -175,6 +175,8 @@ static void __init clk_init(void) { tclk = clk_register_fixed_rate(NULL, "tclk", NULL, CLK_IS_ROOT, get_tclk()); + + orion_clkdev_init(tclk); } /***************************************************************************** diff --git a/arch/arm/mach-orion5x/common.c b/arch/arm/mach-orion5x/common.c index 8166052..2ef82e2 100644 --- a/arch/arm/mach-orion5x/common.c +++ b/arch/arm/mach-orion5x/common.c @@ -79,6 +79,8 @@ static void __init clk_init(void) { tclk = clk_register_fixed_rate(NULL, "tclk", NULL, CLK_IS_ROOT, orion5x_tclk); + + orion_clkdev_init(tclk); } /***************************************************************************** @@ -144,7 +146,7 @@ void __init orion5x_sata_init(struct mv_sata_platform_data *sata_data) ****************************************************************************/ void __init orion5x_spi_init() { - orion_spi_init(SPI_PHYS_BASE, orion5x_tclk); + orion_spi_init(SPI_PHYS_BASE); } diff --git a/arch/arm/mach-orion5x/rd88f6183ap-ge-setup.c b/arch/arm/mach-orion5x/rd88f6183ap-ge-setup.c index 2c5fab0..7b97a9a 100644 --- a/arch/arm/mach-orion5x/rd88f6183ap-ge-setup.c +++ b/arch/arm/mach-orion5x/rd88f6183ap-ge-setup.c @@ -16,7 +16,6 @@ #include <linux/mtd/physmap.h> #include <linux/mv643xx_eth.h> #include <linux/spi/spi.h> -#include <linux/spi/orion_spi.h> #include <linux/spi/flash.h> #include <linux/ethtool.h> #include <net/dsa.h> diff --git a/arch/arm/plat-orion/common.c b/arch/arm/plat-orion/common.c index 4fdd2e7..bbe50a9 100644 --- a/arch/arm/plat-orion/common.c +++ b/arch/arm/plat-orion/common.c @@ -19,12 +19,32 @@ #include <linux/mv643xx_eth.h> #include <linux/mv643xx_i2c.h> #include <net/dsa.h> -#include <linux/spi/orion_spi.h> #include <plat/orion_wdt.h> #include <plat/mv_xor.h> #include <plat/ehci-orion.h> #include <mach/bridge-regs.h> +/* Create a clkdev entry for a given device/clk */ +void __init orion_clkdev_add(const char *con_id, const char *dev_id, + struct clk *clk) +{ + struct clk_lookup *cl; + + cl = clkdev_alloc(clk, con_id, dev_id); + if (cl) + clkdev_add(cl); +} + +/* Create clkdev entries for all orion platforms except kirkwood. + Kirkwood has gated clocks for some of its peripherals, so creates + its own clkdev entries. For all the other orion devices, create + clkdev entries to the tclk. */ +void __init orion_clkdev_init(struct clk *tclk) +{ + orion_clkdev_add(NULL, "orion_spi.0", tclk); + orion_clkdev_add(NULL, "orion_spi.1", tclk); +} + /* Fill in the resources structure and link it into the platform device structure. There is always a memory region, and nearly always an interrupt.*/ @@ -523,44 +543,32 @@ void __init orion_i2c_1_init(unsigned long mapbase, /***************************************************************************** * SPI ****************************************************************************/ -static struct orion_spi_info orion_spi_plat_data; static struct resource orion_spi_resources; static struct platform_device orion_spi = { .name = "orion_spi", .id = 0, - .dev = { - .platform_data = &orion_spi_plat_data, - }, }; -static struct orion_spi_info orion_spi_1_plat_data; static struct resource orion_spi_1_resources; static struct platform_device orion_spi_1 = { .name = "orion_spi", .id = 1, - .dev = { - .platform_data = &orion_spi_1_plat_data, - }, }; /* Note: The SPI silicon core does have interrupts. However the * current Linux software driver does not use interrupts. */ -void __init orion_spi_init(unsigned long mapbase, - unsigned long tclk) +void __init orion_spi_init(unsigned long mapbase) { - orion_spi_plat_data.tclk = tclk; fill_resources(&orion_spi, &orion_spi_resources, mapbase, SZ_512 - 1, NO_IRQ); platform_device_register(&orion_spi); } -void __init orion_spi_1_init(unsigned long mapbase, - unsigned long tclk) +void __init orion_spi_1_init(unsigned long mapbase) { - orion_spi_1_plat_data.tclk = tclk; fill_resources(&orion_spi_1, &orion_spi_1_resources, mapbase, SZ_512 - 1, NO_IRQ); platform_device_register(&orion_spi_1); diff --git a/arch/arm/plat-orion/include/plat/common.h b/arch/arm/plat-orion/include/plat/common.h index a7fa005..d188a1a 100644 --- a/arch/arm/plat-orion/include/plat/common.h +++ b/arch/arm/plat-orion/include/plat/common.h @@ -70,11 +70,9 @@ void __init orion_i2c_1_init(unsigned long mapbase, unsigned long irq, unsigned long freq_m); -void __init orion_spi_init(unsigned long mapbase, - unsigned long tclk); +void __init orion_spi_init(unsigned long mapbase); -void __init orion_spi_1_init(unsigned long mapbase, - unsigned long tclk); +void __init orion_spi_1_init(unsigned long mapbase); void __init orion_wdt_init(unsigned long tclk); @@ -106,4 +104,9 @@ void __init orion_crypto_init(unsigned long mapbase, unsigned long srambase, unsigned long sram_size, unsigned long irq); + +void __init orion_clkdev_add(const char *con_id, const char *dev_id, + struct clk *clk); + +void __init orion_clkdev_init(struct clk *tclk); #endif diff --git a/drivers/spi/spi-orion.c b/drivers/spi/spi-orion.c index e496f79..dfd04e9 100644 --- a/drivers/spi/spi-orion.c +++ b/drivers/spi/spi-orion.c @@ -16,8 +16,8 @@ #include <linux/err.h> #include <linux/io.h> #include <linux/spi/spi.h> -#include <linux/spi/orion_spi.h> #include <linux/module.h> +#include <linux/clk.h> #include <asm/unaligned.h> #define DRIVER_NAME "orion_spi" @@ -46,6 +46,7 @@ struct orion_spi { unsigned int max_speed; unsigned int min_speed; struct orion_spi_info *spi_info; + struct clk *clk; }; static struct workqueue_struct *orion_spi_wq; @@ -104,7 +105,7 @@ static int orion_spi_baudrate_set(struct spi_device *spi, unsigned int speed) orion_spi = spi_master_get_devdata(spi->master); - tclk_hz = orion_spi->spi_info->tclk; + tclk_hz = clk_get_rate(orion_spi->clk); /* * the supported rates are: 4,6,8...30 @@ -450,6 +451,7 @@ static int __init orion_spi_probe(struct platform_device *pdev) struct orion_spi *spi; struct resource *r; struct orion_spi_info *spi_info; + unsigned long tclk_hz; int status = 0; spi_info = pdev->dev.platform_data; @@ -476,19 +478,28 @@ static int __init orion_spi_probe(struct platform_device *pdev) spi->master = master; spi->spi_info = spi_info; - spi->max_speed = DIV_ROUND_UP(spi_info->tclk, 4); - spi->min_speed = DIV_ROUND_UP(spi_info->tclk, 30); + spi->clk = clk_get(&pdev->dev, NULL); + if (IS_ERR(spi->clk)) { + status = PTR_ERR(spi->clk); + goto out; + } + + clk_prepare(spi->clk); + clk_enable(spi->clk); + tclk_hz = clk_get_rate(spi->clk); + spi->max_speed = DIV_ROUND_UP(tclk_hz, 4); + spi->min_speed = DIV_ROUND_UP(tclk_hz, 30); r = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (r == NULL) { status = -ENODEV; - goto out; + goto out_rel_clk; } if (!request_mem_region(r->start, resource_size(r), dev_name(&pdev->dev))) { status = -EBUSY; - goto out; + goto out_rel_clk; } spi->base = ioremap(r->start, SZ_1K); @@ -508,7 +519,9 @@ static int __init orion_spi_probe(struct platform_device *pdev) out_rel_mem: release_mem_region(r->start, resource_size(r)); - +out_rel_clk: + clk_disable_unprepare(spi->clk); + clk_put(spi->clk); out: spi_master_put(master); return status; @@ -526,6 +539,9 @@ static int __exit orion_spi_remove(struct platform_device *pdev) cancel_work_sync(&spi->work); + clk_disable_unprepare(spi->clk); + clk_put(spi->clk); + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); release_mem_region(r->start, resource_size(r)); diff --git a/include/linux/spi/orion_spi.h b/include/linux/spi/orion_spi.h deleted file mode 100644 index b4d9fa6..0000000 --- a/include/linux/spi/orion_spi.h +++ /dev/null @@ -1,17 +0,0 @@ -/* - * orion_spi.h - * - * This file is licensed under the terms of the GNU General Public - * License version 2. This program is licensed "as is" without any - * warranty of any kind, whether express or implied. - */ - -#ifndef __LINUX_SPI_ORION_SPI_H -#define __LINUX_SPI_ORION_SPI_H - -struct orion_spi_info { - u32 tclk; /* no <linux/clk.h> support yet */ -}; - - -#endif |