brcm2708: remove linux 4.4 support

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 0 insertions, 327 deletions

diff --git a/target/linux/brcm2708/patches-4.4/0224-Revert-bcm2835-sdhost-Adjust-to-core-clock-changes.patch b/target/linux/brcm2708/patches-4.4/0224-Revert-bcm2835-sdhost-Adjust-to-core-clock-changes.patch
deleted file mode 100644
index 5469934375..0000000000
--- a/target/linux/brcm2708/patches-4.4/0224-Revert-bcm2835-sdhost-Adjust-to-core-clock-changes.patch
+++ /dev/null
@@ -1,327 +0,0 @@
-From a48331cf3aaa92e7290e8876b13bd1efd64541e6 Mon Sep 17 00:00:00 2001
-From: Phil Elwell <phil@raspberrypi.org>
-Date: Mon, 4 Apr 2016 12:35:51 +0100
-Subject: [PATCH] Revert "bcm2835-sdhost: Adjust to core clock changes"
-
-This reverts commit 4b89d07fd299a0f4e25321920cb74416ba2e638e.
----
- drivers/mmc/host/Kconfig          |   1 -
- drivers/mmc/host/bcm2835-sdhost.c | 140 ++++++--------------------------------
- 2 files changed, 22 insertions(+), 119 deletions(-)
-
---- a/drivers/mmc/host/Kconfig
-+++ b/drivers/mmc/host/Kconfig
-@@ -36,7 +36,6 @@ config MMC_BCM2835_PIO_DMA_BARRIER
- config MMC_BCM2835_SDHOST
- 	tristate "Support for the SDHost controller on BCM2708/9"
- 	depends on MACH_BCM2708 || MACH_BCM2709 || ARCH_BCM2835
--	depends on RASPBERRYPI_FIRMWARE
- 	help
- 	  This selects the SDHost controller on BCM2835/6.
- 
---- a/drivers/mmc/host/bcm2835-sdhost.c
-+++ b/drivers/mmc/host/bcm2835-sdhost.c
-@@ -50,10 +50,6 @@
- #include <linux/of_dma.h>
- #include <linux/time.h>
- #include <linux/workqueue.h>
--#include <linux/cpufreq.h>
--#include <linux/semaphore.h>
--#include <soc/bcm2835/raspberrypi-firmware.h>
--
- 
- #define DRIVER_NAME "sdhost-bcm2835"
- 
-@@ -140,8 +136,6 @@
- 
- #define MHZ 1000000
- 
--#define RPI_FIRMWARE_CLOCK_CORE  4
--
- 
- struct bcm2835_host {
- 	spinlock_t		lock;
-@@ -157,9 +151,7 @@ struct bcm2835_host {
- 
- 	bool			slow_card;	/* Force 11-bit divisor */
- 
--	unsigned int		max_clk;	/* Max src clock freq */
--	unsigned int		min_clk;	/* Min src clock freq */
--	unsigned int		cur_clk;	/* Current src clock freq */
-+	unsigned int		max_clk;	/* Max possible freq */
- 
- 	struct tasklet_struct	finish_tasklet;	/* Tasklet structures */
- 
-@@ -191,7 +183,6 @@ struct bcm2835_host {
- 	unsigned int			use_sbc:1;		/* Send CMD23 */
- 
- 	unsigned int			debug:1;		/* Enable debug output */
--	unsigned int			variable_clock:1;	/* The core clock may change */
- 
- 	/*DMA part*/
- 	struct dma_chan			*dma_chan_rxtx;		/* DMA channel for reads and writes */
-@@ -217,9 +208,6 @@ struct bcm2835_host {
- 	u32				pio_limit;	/* Maximum block count for PIO (0 = always DMA) */
- 
- 	u32				sectors;	/* Cached card size in sectors */
--
--	struct notifier_block		cpufreq_nb;	/* The cpufreq callback list item */
--	struct semaphore		cpufreq_semaphore; /* Interlock between SD activity and cpufreq changes */
- };
- 
- #if ENABLE_LOG
-@@ -239,10 +227,6 @@ static u32 sdhost_log_idx;
- static spinlock_t log_lock;
- static void __iomem *timer_base;
- 
--static int bcm2835_sdhost_cpufreq_callback(struct notifier_block *nb,
--					   unsigned long action, void *data);
--static unsigned int get_core_clock(unsigned int mode);
--
- #define LOG_ENTRIES (256*1)
- #define LOG_SIZE (sizeof(LOG_ENTRY_T)*LOG_ENTRIES)
- 
-@@ -464,14 +448,20 @@ static void bcm2835_sdhost_reset(struct
- 
- static void bcm2835_sdhost_set_ios(struct mmc_host *mmc, struct mmc_ios *ios);
- 
--static void bcm2835_sdhost_init(struct bcm2835_host *host)
-+static void bcm2835_sdhost_init(struct bcm2835_host *host, int soft)
- {
--	pr_debug("bcm2835_sdhost_init()\n");
-+	pr_debug("bcm2835_sdhost_init(%d)\n", soft);
- 
- 	/* Set interrupt enables */
- 	host->hcfg = SDHCFG_BUSY_IRPT_EN;
- 
- 	bcm2835_sdhost_reset_internal(host);
-+
-+	if (soft) {
-+		/* force clock reconfiguration */
-+		host->clock = 0;
-+		bcm2835_sdhost_set_ios(host->mmc, &host->mmc->ios);
-+	}
- }
- 
- static void bcm2835_sdhost_wait_transfer_complete(struct bcm2835_host *host)
-@@ -1509,10 +1499,10 @@ static irqreturn_t bcm2835_sdhost_irq(in
- 	return result;
- }
- 
--void bcm2835_sdhost_set_clock(struct bcm2835_host *host)
-+void bcm2835_sdhost_set_clock(struct bcm2835_host *host, unsigned int clock)
- {
- 	int div = 0; /* Initialized for compiler warning */
--	unsigned int clock = host->clock;
-+	unsigned int input_clock = clock;
- 
- 	if (host->debug)
- 		pr_info("%s: set_clock(%d)\n", mmc_hostname(host->mmc), clock);
-@@ -1553,17 +1543,17 @@ void bcm2835_sdhost_set_clock(struct bcm
- 	    return;
- 	}
- 
--	div = host->cur_clk / clock;
-+	div = host->max_clk / clock;
- 	if (div < 2)
- 		div = 2;
--	if ((host->cur_clk / div) > clock)
-+	if ((host->max_clk / div) > clock)
- 		div++;
- 	div -= 2;
- 
- 	if (div > SDCDIV_MAX_CDIV)
- 	    div = SDCDIV_MAX_CDIV;
- 
--	clock = host->cur_clk / (div + 2);
-+	clock = host->max_clk / (div + 2);
- 	host->mmc->actual_clock = clock;
- 
- 	/* Calibrate some delays */
-@@ -1571,7 +1561,7 @@ void bcm2835_sdhost_set_clock(struct bcm
- 	host->ns_per_fifo_word = (1000000000/clock) *
- 		((host->mmc->caps & MMC_CAP_4_BIT_DATA) ? 8 : 32);
- 
--	if (clock > host->clock) {
-+	if (clock > input_clock) {
- 		/* Save the closest value, to make it easier
- 		   to reduce in the event of error */
- 		host->overclock_50 = (clock/MHZ);
-@@ -1597,9 +1587,9 @@ void bcm2835_sdhost_set_clock(struct bcm
- 	bcm2835_sdhost_write(host, host->mmc->actual_clock/2, SDTOUT);
- 
- 	if (host->debug)
--		pr_info("%s: clock=%d -> cur_clk=%d, cdiv=%x (actual clock %d)\n",
--			mmc_hostname(host->mmc), host->clock,
--			host->cur_clk, host->cdiv, host->mmc->actual_clock);
-+		pr_info("%s: clock=%d -> max_clk=%d, cdiv=%x (actual clock %d)\n",
-+			mmc_hostname(host->mmc), input_clock,
-+			host->max_clk, host->cdiv, host->mmc->actual_clock);
- }
- 
- static void bcm2835_sdhost_request(struct mmc_host *mmc, struct mmc_request *mrq)
-@@ -1648,13 +1638,6 @@ static void bcm2835_sdhost_request(struc
- 	    (mrq->data->blocks > host->pio_limit))
- 		bcm2835_sdhost_prepare_dma(host, mrq->data);
- 
--	if (host->variable_clock &&
--	    (down_killable(&host->cpufreq_semaphore) != 0)) {
--		mrq->cmd->error = -EINTR;
--		mmc_request_done(mmc, mrq);
--		return;
--	}
--
- 	spin_lock_irqsave(&host->lock, flags);
- 
- 	WARN_ON(host->mrq != NULL);
-@@ -1704,52 +1687,6 @@ static void bcm2835_sdhost_request(struc
- 	spin_unlock_irqrestore(&host->lock, flags);
- }
- 
--static int bcm2835_sdhost_cpufreq_callback(struct notifier_block *nb,
--					   unsigned long action, void *data)
--{
--	struct cpufreq_freqs *freq = data;
--	struct bcm2835_host *host;
--
--	host = container_of(nb, struct bcm2835_host, cpufreq_nb);
--
--	if (freq->cpu == 0) {
--		switch (action) {
--		case CPUFREQ_PRECHANGE:
--			if (down_killable(&host->cpufreq_semaphore) != 0)
--				return NOTIFY_BAD;
--			break;
--		case CPUFREQ_POSTCHANGE:
--			if (freq->new > freq->old)
--				host->cur_clk = host->max_clk;
--			else
--				host->cur_clk = host->min_clk;
--			bcm2835_sdhost_set_clock(host);
--			up(&host->cpufreq_semaphore);
--			break;
--		default:
--			break;
--		}
--	}
--	return NOTIFY_OK;
--}
--
--static unsigned int get_core_clock(unsigned int mode)
--{
--	struct rpi_firmware *fw = rpi_firmware_get(NULL);
--	struct {
--		u32 id;
--		u32 val;
--	} packet;
--	int ret;
--
--	packet.id = RPI_FIRMWARE_CLOCK_CORE;
--	ret = rpi_firmware_property(fw, mode, &packet, sizeof(packet));
--	if (ret)
--		return 0;
--
--	return packet.val;
--}
--
- static void bcm2835_sdhost_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
- {
- 
-@@ -1763,16 +1700,13 @@ static void bcm2835_sdhost_set_ios(struc
- 			ios->clock, ios->power_mode, ios->bus_width,
- 			ios->timing, ios->signal_voltage, ios->drv_type);
- 
--	if (ios->clock && !host->cur_clk)
--		host->cur_clk = get_core_clock(RPI_FIRMWARE_GET_CLOCK_RATE);
--
- 	spin_lock_irqsave(&host->lock, flags);
- 
- 	log_event("IOS<", ios->clock, 0);
- 
- 	if (!ios->clock || ios->clock != host->clock) {
-+		bcm2835_sdhost_set_clock(host, ios->clock);
- 		host->clock = ios->clock;
--		bcm2835_sdhost_set_clock(host);
- 	}
- 
- 	/* set bus width */
-@@ -1861,7 +1795,7 @@ static void bcm2835_sdhost_tasklet_finis
- 			host->overclock_50--;
- 			pr_warn("%s: reducing overclock due to errors\n",
- 				mmc_hostname(host->mmc));
--			bcm2835_sdhost_set_clock(host);
-+			bcm2835_sdhost_set_clock(host,50*MHZ);
- 			mrq->cmd->error = -EILSEQ;
- 			mrq->cmd->retries = 1;
- 		}
-@@ -1879,9 +1813,6 @@ static void bcm2835_sdhost_tasklet_finis
- 
- 	spin_unlock_irqrestore(&host->lock, flags);
- 
--	if (host->variable_clock)
--		up(&host->cpufreq_semaphore);
--
- 	if (terminate_chan)
- 	{
- 		int err = dmaengine_terminate_all(terminate_chan);
-@@ -1984,10 +1915,10 @@ int bcm2835_sdhost_add_host(struct bcm28
- 	setup_timer(&host->timer, bcm2835_sdhost_timeout,
- 		    (unsigned long)host);
- 
--	bcm2835_sdhost_init(host);
-+	bcm2835_sdhost_init(host, 0);
- 
- 	ret = request_irq(host->irq, bcm2835_sdhost_irq, 0 /*IRQF_SHARED*/,
--			  mmc_hostname(mmc), host);
-+				  mmc_hostname(mmc), host);
- 	if (ret) {
- 		pr_err("%s: failed to request IRQ %d: %d\n",
- 		       mmc_hostname(mmc), host->irq, ret);
-@@ -2022,7 +1953,6 @@ static int bcm2835_sdhost_probe(struct p
- 	struct bcm2835_host *host;
- 	struct mmc_host *mmc;
- 	const __be32 *addr;
--	unsigned int max_clk;
- 	int ret;
- 
- 	pr_debug("bcm2835_sdhost_probe\n");
-@@ -2132,28 +2062,6 @@ static int bcm2835_sdhost_probe(struct p
- 	if (ret)
- 		goto err;
- 
--	/* Query the core clock frequencies */
--	host->min_clk = get_core_clock(RPI_FIRMWARE_GET_MIN_CLOCK_RATE);
--	max_clk = get_core_clock(RPI_FIRMWARE_GET_MAX_CLOCK_RATE);
--	if (max_clk != host->max_clk) {
--		pr_warn("%s: Expected max clock %d, found %d\n",
--			mmc_hostname(mmc), host->max_clk, max_clk);
--		host->max_clk = max_clk;
--	}
--
--	if (host->min_clk != host->max_clk) {
--		host->cpufreq_nb.notifier_call =
--			bcm2835_sdhost_cpufreq_callback;
--		sema_init(&host->cpufreq_semaphore, 1);
--		cpufreq_register_notifier(&host->cpufreq_nb,
--					  CPUFREQ_TRANSITION_NOTIFIER);
--		host->variable_clock = 1;
--		host->cur_clk = 0; /* Get this later */
--	} else {
--		host->variable_clock = 0;
--		host->cur_clk = host->max_clk;
--	}
--
- 	platform_set_drvdata(pdev, host);
- 
- 	pr_debug("bcm2835_sdhost_probe -> OK\n");
-@@ -2173,10 +2081,6 @@ static int bcm2835_sdhost_remove(struct
- 
- 	pr_debug("bcm2835_sdhost_remove\n");
- 
--	if (host->variable_clock)
--		cpufreq_unregister_notifier(&host->cpufreq_nb,
--					    CPUFREQ_TRANSITION_NOTIFIER);
--
- 	mmc_remove_host(host->mmc);
- 
- 	bcm2835_sdhost_set_power(host, false);